1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (c) 2020 MediaTek Inc. 3 4 #include <linux/clk.h> 5 #include <linux/delay.h> 6 #include <linux/device.h> 7 #include <linux/gpio/consumer.h> 8 #include <linux/i2c.h> 9 #include <linux/module.h> 10 #include <linux/pm_runtime.h> 11 #include <linux/regulator/consumer.h> 12 #include <linux/units.h> 13 #include <media/media-entity.h> 14 #include <media/v4l2-async.h> 15 #include <media/v4l2-ctrls.h> 16 #include <media/v4l2-fwnode.h> 17 #include <media/v4l2-subdev.h> 18 19 #define OV02A10_ID 0x2509 20 #define OV02A10_ID_MASK GENMASK(15, 0) 21 22 #define OV02A10_REG_CHIP_ID 0x02 23 24 /* Bit[1] vertical upside down */ 25 /* Bit[0] horizontal mirror */ 26 #define REG_MIRROR_FLIP_CONTROL 0x3f 27 28 /* Orientation */ 29 #define REG_MIRROR_FLIP_ENABLE 0x03 30 31 /* Bit[2:0] MIPI transmission speed select */ 32 #define TX_SPEED_AREA_SEL 0xa1 33 #define OV02A10_MIPI_TX_SPEED_DEFAULT 0x04 34 35 #define REG_PAGE_SWITCH 0xfd 36 #define REG_GLOBAL_EFFECTIVE 0x01 37 #define REG_ENABLE BIT(0) 38 39 #define REG_SC_CTRL_MODE 0xac 40 #define SC_CTRL_MODE_STANDBY 0x00 41 #define SC_CTRL_MODE_STREAMING 0x01 42 43 /* Exposure control */ 44 #define OV02A10_EXP_SHIFT 8 45 #define OV02A10_REG_EXPOSURE_H 0x03 46 #define OV02A10_REG_EXPOSURE_L 0x04 47 #define OV02A10_EXPOSURE_MIN 4 48 #define OV02A10_EXPOSURE_MAX_MARGIN 4 49 #define OV02A10_EXPOSURE_STEP 1 50 51 /* Vblanking control */ 52 #define OV02A10_VTS_SHIFT 8 53 #define OV02A10_REG_VTS_H 0x05 54 #define OV02A10_REG_VTS_L 0x06 55 #define OV02A10_VTS_MAX 0x209f 56 #define OV02A10_BASE_LINES 1224 57 58 /* Analog gain control */ 59 #define OV02A10_REG_GAIN 0x24 60 #define OV02A10_GAIN_MIN 0x10 61 #define OV02A10_GAIN_MAX 0xf8 62 #define OV02A10_GAIN_STEP 0x01 63 #define OV02A10_GAIN_DEFAULT 0x40 64 65 /* Test pattern control */ 66 #define OV02A10_REG_TEST_PATTERN 0xb6 67 68 #define OV02A10_LINK_FREQ_390MHZ (390 * HZ_PER_MHZ) 69 #define OV02A10_ECLK_FREQ (24 * HZ_PER_MHZ) 70 71 /* Number of lanes supported by this driver */ 72 #define OV02A10_DATA_LANES 1 73 74 /* Bits per sample of sensor output */ 75 #define OV02A10_BITS_PER_SAMPLE 10 76 77 static const char * const ov02a10_supply_names[] = { 78 "dovdd", /* Digital I/O power */ 79 "avdd", /* Analog power */ 80 "dvdd", /* Digital core power */ 81 }; 82 83 struct ov02a10_reg { 84 u8 addr; 85 u8 val; 86 }; 87 88 struct ov02a10_reg_list { 89 u32 num_of_regs; 90 const struct ov02a10_reg *regs; 91 }; 92 93 struct ov02a10_mode { 94 u32 width; 95 u32 height; 96 u32 exp_def; 97 u32 hts_def; 98 u32 vts_def; 99 const struct ov02a10_reg_list reg_list; 100 }; 101 102 struct ov02a10 { 103 u32 eclk_freq; 104 /* Indication of MIPI transmission speed select */ 105 u32 mipi_clock_voltage; 106 107 struct clk *eclk; 108 struct gpio_desc *pd_gpio; 109 struct gpio_desc *rst_gpio; 110 struct regulator_bulk_data supplies[ARRAY_SIZE(ov02a10_supply_names)]; 111 112 bool streaming; 113 bool upside_down; 114 115 /* 116 * Serialize control access, get/set format, get selection 117 * and start streaming. 118 */ 119 struct mutex mutex; 120 struct v4l2_subdev subdev; 121 struct media_pad pad; 122 struct v4l2_mbus_framefmt fmt; 123 struct v4l2_ctrl_handler ctrl_handler; 124 struct v4l2_ctrl *exposure; 125 126 const struct ov02a10_mode *cur_mode; 127 }; 128 129 static inline struct ov02a10 *to_ov02a10(struct v4l2_subdev *sd) 130 { 131 return container_of(sd, struct ov02a10, subdev); 132 } 133 134 /* 135 * eclk 24Mhz 136 * pclk 39Mhz 137 * linelength 934(0x3a6) 138 * framelength 1390(0x56E) 139 * grabwindow_width 1600 140 * grabwindow_height 1200 141 * max_framerate 30fps 142 * mipi_datarate per lane 780Mbps 143 */ 144 static const struct ov02a10_reg ov02a10_1600x1200_regs[] = { 145 {0xfd, 0x01}, 146 {0xac, 0x00}, 147 {0xfd, 0x00}, 148 {0x2f, 0x29}, 149 {0x34, 0x00}, 150 {0x35, 0x21}, 151 {0x30, 0x15}, 152 {0x33, 0x01}, 153 {0xfd, 0x01}, 154 {0x44, 0x00}, 155 {0x2a, 0x4c}, 156 {0x2b, 0x1e}, 157 {0x2c, 0x60}, 158 {0x25, 0x11}, 159 {0x03, 0x01}, 160 {0x04, 0xae}, 161 {0x09, 0x00}, 162 {0x0a, 0x02}, 163 {0x06, 0xa6}, 164 {0x31, 0x00}, 165 {0x24, 0x40}, 166 {0x01, 0x01}, 167 {0xfb, 0x73}, 168 {0xfd, 0x01}, 169 {0x16, 0x04}, 170 {0x1c, 0x09}, 171 {0x21, 0x42}, 172 {0x12, 0x04}, 173 {0x13, 0x10}, 174 {0x11, 0x40}, 175 {0x33, 0x81}, 176 {0xd0, 0x00}, 177 {0xd1, 0x01}, 178 {0xd2, 0x00}, 179 {0x50, 0x10}, 180 {0x51, 0x23}, 181 {0x52, 0x20}, 182 {0x53, 0x10}, 183 {0x54, 0x02}, 184 {0x55, 0x20}, 185 {0x56, 0x02}, 186 {0x58, 0x48}, 187 {0x5d, 0x15}, 188 {0x5e, 0x05}, 189 {0x66, 0x66}, 190 {0x68, 0x68}, 191 {0x6b, 0x00}, 192 {0x6c, 0x00}, 193 {0x6f, 0x40}, 194 {0x70, 0x40}, 195 {0x71, 0x0a}, 196 {0x72, 0xf0}, 197 {0x73, 0x10}, 198 {0x75, 0x80}, 199 {0x76, 0x10}, 200 {0x84, 0x00}, 201 {0x85, 0x10}, 202 {0x86, 0x10}, 203 {0x87, 0x00}, 204 {0x8a, 0x22}, 205 {0x8b, 0x22}, 206 {0x19, 0xf1}, 207 {0x29, 0x01}, 208 {0xfd, 0x01}, 209 {0x9d, 0x16}, 210 {0xa0, 0x29}, 211 {0xa1, 0x04}, 212 {0xad, 0x62}, 213 {0xae, 0x00}, 214 {0xaf, 0x85}, 215 {0xb1, 0x01}, 216 {0x8e, 0x06}, 217 {0x8f, 0x40}, 218 {0x90, 0x04}, 219 {0x91, 0xb0}, 220 {0x45, 0x01}, 221 {0x46, 0x00}, 222 {0x47, 0x6c}, 223 {0x48, 0x03}, 224 {0x49, 0x8b}, 225 {0x4a, 0x00}, 226 {0x4b, 0x07}, 227 {0x4c, 0x04}, 228 {0x4d, 0xb7}, 229 {0xf0, 0x40}, 230 {0xf1, 0x40}, 231 {0xf2, 0x40}, 232 {0xf3, 0x40}, 233 {0x3f, 0x00}, 234 {0xfd, 0x01}, 235 {0x05, 0x00}, 236 {0x06, 0xa6}, 237 {0xfd, 0x01}, 238 }; 239 240 static const char * const ov02a10_test_pattern_menu[] = { 241 "Disabled", 242 "Eight Vertical Colour Bars", 243 }; 244 245 static const s64 link_freq_menu_items[] = { 246 OV02A10_LINK_FREQ_390MHZ, 247 }; 248 249 static u64 to_pixel_rate(u32 f_index) 250 { 251 u64 pixel_rate = link_freq_menu_items[f_index] * 2 * OV02A10_DATA_LANES; 252 253 do_div(pixel_rate, OV02A10_BITS_PER_SAMPLE); 254 255 return pixel_rate; 256 } 257 258 static const struct ov02a10_mode supported_modes[] = { 259 { 260 .width = 1600, 261 .height = 1200, 262 .exp_def = 0x01ae, 263 .hts_def = 0x03a6, 264 .vts_def = 0x056e, 265 .reg_list = { 266 .num_of_regs = ARRAY_SIZE(ov02a10_1600x1200_regs), 267 .regs = ov02a10_1600x1200_regs, 268 }, 269 }, 270 }; 271 272 static int ov02a10_write_array(struct ov02a10 *ov02a10, 273 const struct ov02a10_reg_list *r_list) 274 { 275 struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); 276 unsigned int i; 277 int ret; 278 279 for (i = 0; i < r_list->num_of_regs; i++) { 280 ret = i2c_smbus_write_byte_data(client, r_list->regs[i].addr, 281 r_list->regs[i].val); 282 if (ret < 0) 283 return ret; 284 } 285 286 return 0; 287 } 288 289 static void ov02a10_fill_fmt(const struct ov02a10_mode *mode, 290 struct v4l2_mbus_framefmt *fmt) 291 { 292 fmt->width = mode->width; 293 fmt->height = mode->height; 294 fmt->field = V4L2_FIELD_NONE; 295 } 296 297 static int ov02a10_set_fmt(struct v4l2_subdev *sd, 298 struct v4l2_subdev_state *sd_state, 299 struct v4l2_subdev_format *fmt) 300 { 301 struct ov02a10 *ov02a10 = to_ov02a10(sd); 302 struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format; 303 struct v4l2_mbus_framefmt *frame_fmt; 304 int ret = 0; 305 306 mutex_lock(&ov02a10->mutex); 307 308 if (ov02a10->streaming && fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) { 309 ret = -EBUSY; 310 goto out_unlock; 311 } 312 313 /* Only one sensor mode supported */ 314 mbus_fmt->code = ov02a10->fmt.code; 315 ov02a10_fill_fmt(ov02a10->cur_mode, mbus_fmt); 316 317 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) 318 frame_fmt = v4l2_subdev_get_try_format(sd, sd_state, 0); 319 else 320 frame_fmt = &ov02a10->fmt; 321 322 *frame_fmt = *mbus_fmt; 323 324 out_unlock: 325 mutex_unlock(&ov02a10->mutex); 326 return ret; 327 } 328 329 static int ov02a10_get_fmt(struct v4l2_subdev *sd, 330 struct v4l2_subdev_state *sd_state, 331 struct v4l2_subdev_format *fmt) 332 { 333 struct ov02a10 *ov02a10 = to_ov02a10(sd); 334 struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format; 335 336 mutex_lock(&ov02a10->mutex); 337 338 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { 339 fmt->format = *v4l2_subdev_get_try_format(sd, sd_state, 340 fmt->pad); 341 } else { 342 fmt->format = ov02a10->fmt; 343 mbus_fmt->code = ov02a10->fmt.code; 344 ov02a10_fill_fmt(ov02a10->cur_mode, mbus_fmt); 345 } 346 347 mutex_unlock(&ov02a10->mutex); 348 349 return 0; 350 } 351 352 static int ov02a10_enum_mbus_code(struct v4l2_subdev *sd, 353 struct v4l2_subdev_state *sd_state, 354 struct v4l2_subdev_mbus_code_enum *code) 355 { 356 struct ov02a10 *ov02a10 = to_ov02a10(sd); 357 358 if (code->index != 0) 359 return -EINVAL; 360 361 code->code = ov02a10->fmt.code; 362 363 return 0; 364 } 365 366 static int ov02a10_enum_frame_sizes(struct v4l2_subdev *sd, 367 struct v4l2_subdev_state *sd_state, 368 struct v4l2_subdev_frame_size_enum *fse) 369 { 370 if (fse->index >= ARRAY_SIZE(supported_modes)) 371 return -EINVAL; 372 373 fse->min_width = supported_modes[fse->index].width; 374 fse->max_width = supported_modes[fse->index].width; 375 fse->max_height = supported_modes[fse->index].height; 376 fse->min_height = supported_modes[fse->index].height; 377 378 return 0; 379 } 380 381 static int ov02a10_check_sensor_id(struct ov02a10 *ov02a10) 382 { 383 struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); 384 u16 chip_id; 385 int ret; 386 387 /* Validate the chip ID */ 388 ret = i2c_smbus_read_word_swapped(client, OV02A10_REG_CHIP_ID); 389 if (ret < 0) 390 return ret; 391 392 chip_id = le16_to_cpu((__force __le16)ret); 393 394 if ((chip_id & OV02A10_ID_MASK) != OV02A10_ID) { 395 dev_err(&client->dev, "unexpected sensor id(0x%04x)\n", chip_id); 396 return -EINVAL; 397 } 398 399 return 0; 400 } 401 402 static int ov02a10_power_on(struct device *dev) 403 { 404 struct i2c_client *client = to_i2c_client(dev); 405 struct v4l2_subdev *sd = i2c_get_clientdata(client); 406 struct ov02a10 *ov02a10 = to_ov02a10(sd); 407 int ret; 408 409 gpiod_set_value_cansleep(ov02a10->rst_gpio, 1); 410 gpiod_set_value_cansleep(ov02a10->pd_gpio, 1); 411 412 ret = clk_prepare_enable(ov02a10->eclk); 413 if (ret < 0) { 414 dev_err(dev, "failed to enable eclk\n"); 415 return ret; 416 } 417 418 ret = regulator_bulk_enable(ARRAY_SIZE(ov02a10_supply_names), 419 ov02a10->supplies); 420 if (ret < 0) { 421 dev_err(dev, "failed to enable regulators\n"); 422 goto disable_clk; 423 } 424 usleep_range(5000, 6000); 425 426 gpiod_set_value_cansleep(ov02a10->pd_gpio, 0); 427 usleep_range(5000, 6000); 428 429 gpiod_set_value_cansleep(ov02a10->rst_gpio, 0); 430 usleep_range(5000, 6000); 431 432 ret = ov02a10_check_sensor_id(ov02a10); 433 if (ret) 434 goto disable_regulator; 435 436 return 0; 437 438 disable_regulator: 439 regulator_bulk_disable(ARRAY_SIZE(ov02a10_supply_names), 440 ov02a10->supplies); 441 disable_clk: 442 clk_disable_unprepare(ov02a10->eclk); 443 444 return ret; 445 } 446 447 static int ov02a10_power_off(struct device *dev) 448 { 449 struct i2c_client *client = to_i2c_client(dev); 450 struct v4l2_subdev *sd = i2c_get_clientdata(client); 451 struct ov02a10 *ov02a10 = to_ov02a10(sd); 452 453 gpiod_set_value_cansleep(ov02a10->rst_gpio, 1); 454 clk_disable_unprepare(ov02a10->eclk); 455 gpiod_set_value_cansleep(ov02a10->pd_gpio, 1); 456 regulator_bulk_disable(ARRAY_SIZE(ov02a10_supply_names), 457 ov02a10->supplies); 458 459 return 0; 460 } 461 462 static int __ov02a10_start_stream(struct ov02a10 *ov02a10) 463 { 464 struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); 465 const struct ov02a10_reg_list *reg_list; 466 int ret; 467 468 /* Apply default values of current mode */ 469 reg_list = &ov02a10->cur_mode->reg_list; 470 ret = ov02a10_write_array(ov02a10, reg_list); 471 if (ret) 472 return ret; 473 474 /* Apply customized values from user */ 475 ret = __v4l2_ctrl_handler_setup(ov02a10->subdev.ctrl_handler); 476 if (ret) 477 return ret; 478 479 /* Set orientation to 180 degree */ 480 if (ov02a10->upside_down) { 481 ret = i2c_smbus_write_byte_data(client, REG_MIRROR_FLIP_CONTROL, 482 REG_MIRROR_FLIP_ENABLE); 483 if (ret < 0) { 484 dev_err(&client->dev, "failed to set orientation\n"); 485 return ret; 486 } 487 ret = i2c_smbus_write_byte_data(client, REG_GLOBAL_EFFECTIVE, 488 REG_ENABLE); 489 if (ret < 0) 490 return ret; 491 } 492 493 /* Set MIPI TX speed according to DT property */ 494 if (ov02a10->mipi_clock_voltage != OV02A10_MIPI_TX_SPEED_DEFAULT) { 495 ret = i2c_smbus_write_byte_data(client, TX_SPEED_AREA_SEL, 496 ov02a10->mipi_clock_voltage); 497 if (ret < 0) 498 return ret; 499 } 500 501 /* Set stream on register */ 502 return i2c_smbus_write_byte_data(client, REG_SC_CTRL_MODE, 503 SC_CTRL_MODE_STREAMING); 504 } 505 506 static int __ov02a10_stop_stream(struct ov02a10 *ov02a10) 507 { 508 struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); 509 510 return i2c_smbus_write_byte_data(client, REG_SC_CTRL_MODE, 511 SC_CTRL_MODE_STANDBY); 512 } 513 514 static int ov02a10_entity_init_cfg(struct v4l2_subdev *sd, 515 struct v4l2_subdev_state *sd_state) 516 { 517 struct v4l2_subdev_format fmt = { 518 .which = V4L2_SUBDEV_FORMAT_TRY, 519 .format = { 520 .width = 1600, 521 .height = 1200, 522 } 523 }; 524 525 ov02a10_set_fmt(sd, sd_state, &fmt); 526 527 return 0; 528 } 529 530 static int ov02a10_s_stream(struct v4l2_subdev *sd, int on) 531 { 532 struct ov02a10 *ov02a10 = to_ov02a10(sd); 533 struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); 534 int ret; 535 536 mutex_lock(&ov02a10->mutex); 537 538 if (ov02a10->streaming == on) { 539 ret = 0; 540 goto unlock_and_return; 541 } 542 543 if (on) { 544 ret = pm_runtime_resume_and_get(&client->dev); 545 if (ret < 0) 546 goto unlock_and_return; 547 548 ret = __ov02a10_start_stream(ov02a10); 549 if (ret) { 550 __ov02a10_stop_stream(ov02a10); 551 ov02a10->streaming = !on; 552 goto err_rpm_put; 553 } 554 } else { 555 __ov02a10_stop_stream(ov02a10); 556 pm_runtime_put(&client->dev); 557 } 558 559 ov02a10->streaming = on; 560 mutex_unlock(&ov02a10->mutex); 561 562 return 0; 563 564 err_rpm_put: 565 pm_runtime_put(&client->dev); 566 unlock_and_return: 567 mutex_unlock(&ov02a10->mutex); 568 569 return ret; 570 } 571 572 static const struct dev_pm_ops ov02a10_pm_ops = { 573 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 574 pm_runtime_force_resume) 575 SET_RUNTIME_PM_OPS(ov02a10_power_off, ov02a10_power_on, NULL) 576 }; 577 578 static int ov02a10_set_exposure(struct ov02a10 *ov02a10, int val) 579 { 580 struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); 581 int ret; 582 583 ret = i2c_smbus_write_byte_data(client, REG_PAGE_SWITCH, REG_ENABLE); 584 if (ret < 0) 585 return ret; 586 587 ret = i2c_smbus_write_byte_data(client, OV02A10_REG_EXPOSURE_H, 588 val >> OV02A10_EXP_SHIFT); 589 if (ret < 0) 590 return ret; 591 592 ret = i2c_smbus_write_byte_data(client, OV02A10_REG_EXPOSURE_L, val); 593 if (ret < 0) 594 return ret; 595 596 return i2c_smbus_write_byte_data(client, REG_GLOBAL_EFFECTIVE, 597 REG_ENABLE); 598 } 599 600 static int ov02a10_set_gain(struct ov02a10 *ov02a10, int val) 601 { 602 struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); 603 int ret; 604 605 ret = i2c_smbus_write_byte_data(client, REG_PAGE_SWITCH, REG_ENABLE); 606 if (ret < 0) 607 return ret; 608 609 ret = i2c_smbus_write_byte_data(client, OV02A10_REG_GAIN, val); 610 if (ret < 0) 611 return ret; 612 613 return i2c_smbus_write_byte_data(client, REG_GLOBAL_EFFECTIVE, 614 REG_ENABLE); 615 } 616 617 static int ov02a10_set_vblank(struct ov02a10 *ov02a10, int val) 618 { 619 struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); 620 u32 vts = val + ov02a10->cur_mode->height - OV02A10_BASE_LINES; 621 int ret; 622 623 ret = i2c_smbus_write_byte_data(client, REG_PAGE_SWITCH, REG_ENABLE); 624 if (ret < 0) 625 return ret; 626 627 ret = i2c_smbus_write_byte_data(client, OV02A10_REG_VTS_H, 628 vts >> OV02A10_VTS_SHIFT); 629 if (ret < 0) 630 return ret; 631 632 ret = i2c_smbus_write_byte_data(client, OV02A10_REG_VTS_L, vts); 633 if (ret < 0) 634 return ret; 635 636 return i2c_smbus_write_byte_data(client, REG_GLOBAL_EFFECTIVE, 637 REG_ENABLE); 638 } 639 640 static int ov02a10_set_test_pattern(struct ov02a10 *ov02a10, int pattern) 641 { 642 struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); 643 int ret; 644 645 ret = i2c_smbus_write_byte_data(client, REG_PAGE_SWITCH, REG_ENABLE); 646 if (ret < 0) 647 return ret; 648 649 ret = i2c_smbus_write_byte_data(client, OV02A10_REG_TEST_PATTERN, 650 pattern); 651 if (ret < 0) 652 return ret; 653 654 ret = i2c_smbus_write_byte_data(client, REG_GLOBAL_EFFECTIVE, 655 REG_ENABLE); 656 if (ret < 0) 657 return ret; 658 659 return i2c_smbus_write_byte_data(client, REG_SC_CTRL_MODE, 660 SC_CTRL_MODE_STREAMING); 661 } 662 663 static int ov02a10_set_ctrl(struct v4l2_ctrl *ctrl) 664 { 665 struct ov02a10 *ov02a10 = container_of(ctrl->handler, 666 struct ov02a10, ctrl_handler); 667 struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); 668 s64 max_expo; 669 int ret; 670 671 /* Propagate change of current control to all related controls */ 672 if (ctrl->id == V4L2_CID_VBLANK) { 673 /* Update max exposure while meeting expected vblanking */ 674 max_expo = ov02a10->cur_mode->height + ctrl->val - 675 OV02A10_EXPOSURE_MAX_MARGIN; 676 __v4l2_ctrl_modify_range(ov02a10->exposure, 677 ov02a10->exposure->minimum, max_expo, 678 ov02a10->exposure->step, 679 ov02a10->exposure->default_value); 680 } 681 682 /* V4L2 controls values will be applied only when power is already up */ 683 if (!pm_runtime_get_if_in_use(&client->dev)) 684 return 0; 685 686 switch (ctrl->id) { 687 case V4L2_CID_EXPOSURE: 688 ret = ov02a10_set_exposure(ov02a10, ctrl->val); 689 break; 690 case V4L2_CID_ANALOGUE_GAIN: 691 ret = ov02a10_set_gain(ov02a10, ctrl->val); 692 break; 693 case V4L2_CID_VBLANK: 694 ret = ov02a10_set_vblank(ov02a10, ctrl->val); 695 break; 696 case V4L2_CID_TEST_PATTERN: 697 ret = ov02a10_set_test_pattern(ov02a10, ctrl->val); 698 break; 699 default: 700 ret = -EINVAL; 701 break; 702 } 703 704 pm_runtime_put(&client->dev); 705 706 return ret; 707 } 708 709 static const struct v4l2_subdev_video_ops ov02a10_video_ops = { 710 .s_stream = ov02a10_s_stream, 711 }; 712 713 static const struct v4l2_subdev_pad_ops ov02a10_pad_ops = { 714 .init_cfg = ov02a10_entity_init_cfg, 715 .enum_mbus_code = ov02a10_enum_mbus_code, 716 .enum_frame_size = ov02a10_enum_frame_sizes, 717 .get_fmt = ov02a10_get_fmt, 718 .set_fmt = ov02a10_set_fmt, 719 }; 720 721 static const struct v4l2_subdev_ops ov02a10_subdev_ops = { 722 .video = &ov02a10_video_ops, 723 .pad = &ov02a10_pad_ops, 724 }; 725 726 static const struct media_entity_operations ov02a10_subdev_entity_ops = { 727 .link_validate = v4l2_subdev_link_validate, 728 }; 729 730 static const struct v4l2_ctrl_ops ov02a10_ctrl_ops = { 731 .s_ctrl = ov02a10_set_ctrl, 732 }; 733 734 static int ov02a10_initialize_controls(struct ov02a10 *ov02a10) 735 { 736 struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); 737 const struct ov02a10_mode *mode; 738 struct v4l2_ctrl_handler *handler; 739 struct v4l2_ctrl *ctrl; 740 s64 exposure_max; 741 s64 vblank_def; 742 s64 pixel_rate; 743 s64 h_blank; 744 int ret; 745 746 handler = &ov02a10->ctrl_handler; 747 mode = ov02a10->cur_mode; 748 ret = v4l2_ctrl_handler_init(handler, 7); 749 if (ret) 750 return ret; 751 752 handler->lock = &ov02a10->mutex; 753 754 ctrl = v4l2_ctrl_new_int_menu(handler, NULL, V4L2_CID_LINK_FREQ, 0, 0, 755 link_freq_menu_items); 756 if (ctrl) 757 ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; 758 759 pixel_rate = to_pixel_rate(0); 760 v4l2_ctrl_new_std(handler, NULL, V4L2_CID_PIXEL_RATE, 0, pixel_rate, 1, 761 pixel_rate); 762 763 h_blank = mode->hts_def - mode->width; 764 v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK, h_blank, h_blank, 1, 765 h_blank); 766 767 vblank_def = mode->vts_def - mode->height; 768 v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops, V4L2_CID_VBLANK, 769 vblank_def, OV02A10_VTS_MAX - mode->height, 1, 770 vblank_def); 771 772 exposure_max = mode->vts_def - 4; 773 ov02a10->exposure = v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops, 774 V4L2_CID_EXPOSURE, 775 OV02A10_EXPOSURE_MIN, 776 exposure_max, 777 OV02A10_EXPOSURE_STEP, 778 mode->exp_def); 779 780 v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops, 781 V4L2_CID_ANALOGUE_GAIN, OV02A10_GAIN_MIN, 782 OV02A10_GAIN_MAX, OV02A10_GAIN_STEP, 783 OV02A10_GAIN_DEFAULT); 784 785 v4l2_ctrl_new_std_menu_items(handler, &ov02a10_ctrl_ops, 786 V4L2_CID_TEST_PATTERN, 787 ARRAY_SIZE(ov02a10_test_pattern_menu) - 1, 788 0, 0, ov02a10_test_pattern_menu); 789 790 if (handler->error) { 791 ret = handler->error; 792 dev_err(&client->dev, "failed to init controls(%d)\n", ret); 793 goto err_free_handler; 794 } 795 796 ov02a10->subdev.ctrl_handler = handler; 797 798 return 0; 799 800 err_free_handler: 801 v4l2_ctrl_handler_free(handler); 802 803 return ret; 804 } 805 806 static int ov02a10_check_hwcfg(struct device *dev, struct ov02a10 *ov02a10) 807 { 808 struct fwnode_handle *ep; 809 struct fwnode_handle *fwnode = dev_fwnode(dev); 810 struct v4l2_fwnode_endpoint bus_cfg = { 811 .bus_type = V4L2_MBUS_CSI2_DPHY, 812 }; 813 unsigned int i, j; 814 u32 clk_volt; 815 int ret; 816 817 if (!fwnode) 818 return -EINVAL; 819 820 ep = fwnode_graph_get_next_endpoint(fwnode, NULL); 821 if (!ep) 822 return -ENXIO; 823 824 ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg); 825 fwnode_handle_put(ep); 826 if (ret) 827 return ret; 828 829 /* Optional indication of MIPI clock voltage unit */ 830 ret = fwnode_property_read_u32(ep, "ovti,mipi-clock-voltage", 831 &clk_volt); 832 833 if (!ret) 834 ov02a10->mipi_clock_voltage = clk_volt; 835 836 for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) { 837 for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) { 838 if (link_freq_menu_items[i] == 839 bus_cfg.link_frequencies[j]) 840 break; 841 } 842 843 if (j == bus_cfg.nr_of_link_frequencies) { 844 dev_err(dev, "no link frequency %lld supported\n", 845 link_freq_menu_items[i]); 846 ret = -EINVAL; 847 break; 848 } 849 } 850 851 v4l2_fwnode_endpoint_free(&bus_cfg); 852 853 return ret; 854 } 855 856 static int ov02a10_probe(struct i2c_client *client) 857 { 858 struct device *dev = &client->dev; 859 struct ov02a10 *ov02a10; 860 unsigned int i; 861 unsigned int rotation; 862 int ret; 863 864 ov02a10 = devm_kzalloc(dev, sizeof(*ov02a10), GFP_KERNEL); 865 if (!ov02a10) 866 return -ENOMEM; 867 868 ret = ov02a10_check_hwcfg(dev, ov02a10); 869 if (ret) 870 return dev_err_probe(dev, ret, 871 "failed to check HW configuration\n"); 872 873 v4l2_i2c_subdev_init(&ov02a10->subdev, client, &ov02a10_subdev_ops); 874 875 ov02a10->mipi_clock_voltage = OV02A10_MIPI_TX_SPEED_DEFAULT; 876 ov02a10->fmt.code = MEDIA_BUS_FMT_SBGGR10_1X10; 877 878 /* Optional indication of physical rotation of sensor */ 879 rotation = 0; 880 device_property_read_u32(dev, "rotation", &rotation); 881 if (rotation == 180) { 882 ov02a10->upside_down = true; 883 ov02a10->fmt.code = MEDIA_BUS_FMT_SRGGB10_1X10; 884 } 885 886 ov02a10->eclk = devm_clk_get(dev, "eclk"); 887 if (IS_ERR(ov02a10->eclk)) 888 return dev_err_probe(dev, PTR_ERR(ov02a10->eclk), 889 "failed to get eclk\n"); 890 891 ret = device_property_read_u32(dev, "clock-frequency", 892 &ov02a10->eclk_freq); 893 if (ret < 0) 894 return dev_err_probe(dev, ret, 895 "failed to get eclk frequency\n"); 896 897 ret = clk_set_rate(ov02a10->eclk, ov02a10->eclk_freq); 898 if (ret < 0) 899 return dev_err_probe(dev, ret, 900 "failed to set eclk frequency (24MHz)\n"); 901 902 if (clk_get_rate(ov02a10->eclk) != OV02A10_ECLK_FREQ) 903 dev_warn(dev, "eclk mismatched, mode is based on 24MHz\n"); 904 905 ov02a10->pd_gpio = devm_gpiod_get(dev, "powerdown", GPIOD_OUT_HIGH); 906 if (IS_ERR(ov02a10->pd_gpio)) 907 return dev_err_probe(dev, PTR_ERR(ov02a10->pd_gpio), 908 "failed to get powerdown-gpios\n"); 909 910 ov02a10->rst_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); 911 if (IS_ERR(ov02a10->rst_gpio)) 912 return dev_err_probe(dev, PTR_ERR(ov02a10->rst_gpio), 913 "failed to get reset-gpios\n"); 914 915 for (i = 0; i < ARRAY_SIZE(ov02a10_supply_names); i++) 916 ov02a10->supplies[i].supply = ov02a10_supply_names[i]; 917 918 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ov02a10_supply_names), 919 ov02a10->supplies); 920 if (ret) 921 return dev_err_probe(dev, ret, "failed to get regulators\n"); 922 923 mutex_init(&ov02a10->mutex); 924 925 /* Set default mode */ 926 ov02a10->cur_mode = &supported_modes[0]; 927 928 ret = ov02a10_initialize_controls(ov02a10); 929 if (ret) { 930 dev_err_probe(dev, ret, "failed to initialize controls\n"); 931 goto err_destroy_mutex; 932 } 933 934 /* Initialize subdev */ 935 ov02a10->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 936 ov02a10->subdev.entity.ops = &ov02a10_subdev_entity_ops; 937 ov02a10->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR; 938 ov02a10->pad.flags = MEDIA_PAD_FL_SOURCE; 939 940 ret = media_entity_pads_init(&ov02a10->subdev.entity, 1, &ov02a10->pad); 941 if (ret < 0) { 942 dev_err_probe(dev, ret, "failed to initialize entity pads\n"); 943 goto err_free_handler; 944 } 945 946 pm_runtime_enable(dev); 947 if (!pm_runtime_enabled(dev)) { 948 ret = ov02a10_power_on(dev); 949 if (ret < 0) { 950 dev_err_probe(dev, ret, "failed to power on\n"); 951 goto err_clean_entity; 952 } 953 } 954 955 ret = v4l2_async_register_subdev(&ov02a10->subdev); 956 if (ret) { 957 dev_err_probe(dev, ret, "failed to register V4L2 subdev\n"); 958 goto err_power_off; 959 } 960 961 return 0; 962 963 err_power_off: 964 if (pm_runtime_enabled(dev)) 965 pm_runtime_disable(dev); 966 else 967 ov02a10_power_off(dev); 968 err_clean_entity: 969 media_entity_cleanup(&ov02a10->subdev.entity); 970 err_free_handler: 971 v4l2_ctrl_handler_free(ov02a10->subdev.ctrl_handler); 972 err_destroy_mutex: 973 mutex_destroy(&ov02a10->mutex); 974 975 return ret; 976 } 977 978 static int ov02a10_remove(struct i2c_client *client) 979 { 980 struct v4l2_subdev *sd = i2c_get_clientdata(client); 981 struct ov02a10 *ov02a10 = to_ov02a10(sd); 982 983 v4l2_async_unregister_subdev(sd); 984 media_entity_cleanup(&sd->entity); 985 v4l2_ctrl_handler_free(sd->ctrl_handler); 986 pm_runtime_disable(&client->dev); 987 if (!pm_runtime_status_suspended(&client->dev)) 988 ov02a10_power_off(&client->dev); 989 pm_runtime_set_suspended(&client->dev); 990 mutex_destroy(&ov02a10->mutex); 991 992 return 0; 993 } 994 995 static const struct of_device_id ov02a10_of_match[] = { 996 { .compatible = "ovti,ov02a10" }, 997 {} 998 }; 999 MODULE_DEVICE_TABLE(of, ov02a10_of_match); 1000 1001 static struct i2c_driver ov02a10_i2c_driver = { 1002 .driver = { 1003 .name = "ov02a10", 1004 .pm = &ov02a10_pm_ops, 1005 .of_match_table = ov02a10_of_match, 1006 }, 1007 .probe_new = &ov02a10_probe, 1008 .remove = &ov02a10_remove, 1009 }; 1010 module_i2c_driver(ov02a10_i2c_driver); 1011 1012 MODULE_AUTHOR("Dongchun Zhu <dongchun.zhu@mediatek.com>"); 1013 MODULE_DESCRIPTION("OmniVision OV02A10 sensor driver"); 1014 MODULE_LICENSE("GPL v2"); 1015