1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2021 Sieć Badawcza Łukasiewicz 4 * - Przemysłowy Instytut Automatyki i Pomiarów PIAP 5 * Written by Krzysztof Hałasa 6 */ 7 8 #include <linux/clk.h> 9 #include <linux/delay.h> 10 #include <linux/pm_runtime.h> 11 12 #include <media/v4l2-ctrls.h> 13 #include <media/v4l2-fwnode.h> 14 #include <media/v4l2-subdev.h> 15 16 /* External clock (extclk) frequencies */ 17 #define AR0521_EXTCLK_MIN (10 * 1000 * 1000) 18 #define AR0521_EXTCLK_MAX (48 * 1000 * 1000) 19 20 /* PLL and PLL2 */ 21 #define AR0521_PLL_MIN (320 * 1000 * 1000) 22 #define AR0521_PLL_MAX (1280 * 1000 * 1000) 23 24 /* Effective pixel sample rate on the pixel array. */ 25 #define AR0521_PIXEL_CLOCK_RATE (184 * 1000 * 1000) 26 #define AR0521_PIXEL_CLOCK_MIN (168 * 1000 * 1000) 27 #define AR0521_PIXEL_CLOCK_MAX (414 * 1000 * 1000) 28 29 #define AR0521_NATIVE_WIDTH 2604u 30 #define AR0521_NATIVE_HEIGHT 1964u 31 #define AR0521_MIN_X_ADDR_START 0u 32 #define AR0521_MIN_Y_ADDR_START 0u 33 #define AR0521_MAX_X_ADDR_END 2603u 34 #define AR0521_MAX_Y_ADDR_END 1955u 35 36 #define AR0521_WIDTH_MIN 8u 37 #define AR0521_WIDTH_MAX 2592u 38 #define AR0521_HEIGHT_MIN 8u 39 #define AR0521_HEIGHT_MAX 1944u 40 41 #define AR0521_WIDTH_BLANKING_MIN 572u 42 #define AR0521_HEIGHT_BLANKING_MIN 38u /* must be even */ 43 #define AR0521_TOTAL_HEIGHT_MAX 65535u /* max_frame_length_lines */ 44 #define AR0521_TOTAL_WIDTH_MAX 65532u /* max_line_length_pck */ 45 46 #define AR0521_ANA_GAIN_MIN 0x00 47 #define AR0521_ANA_GAIN_MAX 0x3f 48 #define AR0521_ANA_GAIN_STEP 0x01 49 #define AR0521_ANA_GAIN_DEFAULT 0x00 50 51 /* AR0521 registers */ 52 #define AR0521_REG_VT_PIX_CLK_DIV 0x0300 53 #define AR0521_REG_FRAME_LENGTH_LINES 0x0340 54 55 #define AR0521_REG_CHIP_ID 0x3000 56 #define AR0521_REG_COARSE_INTEGRATION_TIME 0x3012 57 #define AR0521_REG_ROW_SPEED 0x3016 58 #define AR0521_REG_EXTRA_DELAY 0x3018 59 #define AR0521_REG_RESET 0x301A 60 #define AR0521_REG_RESET_DEFAULTS 0x0238 61 #define AR0521_REG_RESET_GROUP_PARAM_HOLD 0x8000 62 #define AR0521_REG_RESET_STREAM BIT(2) 63 #define AR0521_REG_RESET_RESTART BIT(1) 64 #define AR0521_REG_RESET_INIT BIT(0) 65 66 #define AR0521_REG_ANA_GAIN_CODE_GLOBAL 0x3028 67 68 #define AR0521_REG_GREEN1_GAIN 0x3056 69 #define AR0521_REG_BLUE_GAIN 0x3058 70 #define AR0521_REG_RED_GAIN 0x305A 71 #define AR0521_REG_GREEN2_GAIN 0x305C 72 #define AR0521_REG_GLOBAL_GAIN 0x305E 73 74 #define AR0521_REG_HISPI_TEST_MODE 0x3066 75 #define AR0521_REG_HISPI_TEST_MODE_LP11 0x0004 76 77 #define AR0521_REG_TEST_PATTERN_MODE 0x3070 78 79 #define AR0521_REG_SERIAL_FORMAT 0x31AE 80 #define AR0521_REG_SERIAL_FORMAT_MIPI 0x0200 81 82 #define AR0521_REG_HISPI_CONTROL_STATUS 0x31C6 83 #define AR0521_REG_HISPI_CONTROL_STATUS_FRAMER_TEST_MODE_ENABLE 0x80 84 85 #define be cpu_to_be16 86 87 static const char * const ar0521_supply_names[] = { 88 "vdd_io", /* I/O (1.8V) supply */ 89 "vdd", /* Core, PLL and MIPI (1.2V) supply */ 90 "vaa", /* Analog (2.7V) supply */ 91 }; 92 93 static const s64 ar0521_link_frequencies[] = { 94 184000000, 95 }; 96 97 struct ar0521_ctrls { 98 struct v4l2_ctrl_handler handler; 99 struct { 100 struct v4l2_ctrl *gain; 101 struct v4l2_ctrl *red_balance; 102 struct v4l2_ctrl *blue_balance; 103 }; 104 struct { 105 struct v4l2_ctrl *hblank; 106 struct v4l2_ctrl *vblank; 107 }; 108 struct v4l2_ctrl *pixrate; 109 struct v4l2_ctrl *exposure; 110 struct v4l2_ctrl *test_pattern; 111 }; 112 113 struct ar0521_dev { 114 struct i2c_client *i2c_client; 115 struct v4l2_subdev sd; 116 struct media_pad pad; 117 struct clk *extclk; 118 u32 extclk_freq; 119 120 struct regulator *supplies[ARRAY_SIZE(ar0521_supply_names)]; 121 struct gpio_desc *reset_gpio; 122 123 /* lock to protect all members below */ 124 struct mutex lock; 125 126 struct v4l2_mbus_framefmt fmt; 127 struct ar0521_ctrls ctrls; 128 unsigned int lane_count; 129 struct { 130 u16 pre; 131 u16 mult; 132 u16 pre2; 133 u16 mult2; 134 u16 vt_pix; 135 } pll; 136 }; 137 138 static inline struct ar0521_dev *to_ar0521_dev(struct v4l2_subdev *sd) 139 { 140 return container_of(sd, struct ar0521_dev, sd); 141 } 142 143 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl) 144 { 145 return &container_of(ctrl->handler, struct ar0521_dev, 146 ctrls.handler)->sd; 147 } 148 149 static u32 div64_round(u64 v, u32 d) 150 { 151 return div_u64(v + (d >> 1), d); 152 } 153 154 static u32 div64_round_up(u64 v, u32 d) 155 { 156 return div_u64(v + d - 1, d); 157 } 158 159 static int ar0521_code_to_bpp(struct ar0521_dev *sensor) 160 { 161 switch (sensor->fmt.code) { 162 case MEDIA_BUS_FMT_SGRBG8_1X8: 163 return 8; 164 } 165 166 return -EINVAL; 167 } 168 169 /* Data must be BE16, the first value is the register address */ 170 static int ar0521_write_regs(struct ar0521_dev *sensor, const __be16 *data, 171 unsigned int count) 172 { 173 struct i2c_client *client = sensor->i2c_client; 174 struct i2c_msg msg; 175 int ret; 176 177 msg.addr = client->addr; 178 msg.flags = client->flags; 179 msg.buf = (u8 *)data; 180 msg.len = count * sizeof(*data); 181 182 ret = i2c_transfer(client->adapter, &msg, 1); 183 184 if (ret < 0) { 185 v4l2_err(&sensor->sd, "%s: I2C write error\n", __func__); 186 return ret; 187 } 188 189 return 0; 190 } 191 192 static int ar0521_write_reg(struct ar0521_dev *sensor, u16 reg, u16 val) 193 { 194 __be16 buf[2] = {be(reg), be(val)}; 195 196 return ar0521_write_regs(sensor, buf, 2); 197 } 198 199 static int ar0521_set_geometry(struct ar0521_dev *sensor) 200 { 201 /* Center the image in the visible output window. */ 202 u16 x = clamp((AR0521_WIDTH_MAX - sensor->fmt.width) / 2, 203 AR0521_MIN_X_ADDR_START, AR0521_MAX_X_ADDR_END); 204 u16 y = clamp(((AR0521_HEIGHT_MAX - sensor->fmt.height) / 2) & ~1, 205 AR0521_MIN_Y_ADDR_START, AR0521_MAX_Y_ADDR_END); 206 207 /* All dimensions are unsigned 12-bit integers */ 208 __be16 regs[] = { 209 be(AR0521_REG_FRAME_LENGTH_LINES), 210 be(sensor->fmt.height + sensor->ctrls.vblank->val), 211 be(sensor->fmt.width + sensor->ctrls.hblank->val), 212 be(x), 213 be(y), 214 be(x + sensor->fmt.width - 1), 215 be(y + sensor->fmt.height - 1), 216 be(sensor->fmt.width), 217 be(sensor->fmt.height) 218 }; 219 220 return ar0521_write_regs(sensor, regs, ARRAY_SIZE(regs)); 221 } 222 223 static int ar0521_set_gains(struct ar0521_dev *sensor) 224 { 225 int green = sensor->ctrls.gain->val; 226 int red = max(green + sensor->ctrls.red_balance->val, 0); 227 int blue = max(green + sensor->ctrls.blue_balance->val, 0); 228 unsigned int gain = min(red, min(green, blue)); 229 unsigned int analog = min(gain, 64u); /* range is 0 - 127 */ 230 __be16 regs[5]; 231 232 red = min(red - analog + 64, 511u); 233 green = min(green - analog + 64, 511u); 234 blue = min(blue - analog + 64, 511u); 235 regs[0] = be(AR0521_REG_GREEN1_GAIN); 236 regs[1] = be(green << 7 | analog); 237 regs[2] = be(blue << 7 | analog); 238 regs[3] = be(red << 7 | analog); 239 regs[4] = be(green << 7 | analog); 240 241 return ar0521_write_regs(sensor, regs, ARRAY_SIZE(regs)); 242 } 243 244 static u32 calc_pll(struct ar0521_dev *sensor, u32 freq, u16 *pre_ptr, u16 *mult_ptr) 245 { 246 u16 pre = 1, mult = 1, new_pre; 247 u32 pll = AR0521_PLL_MAX + 1; 248 249 for (new_pre = 1; new_pre < 64; new_pre++) { 250 u32 new_pll; 251 u32 new_mult = div64_round_up((u64)freq * new_pre, 252 sensor->extclk_freq); 253 254 if (new_mult < 32) 255 continue; /* Minimum value */ 256 if (new_mult > 254) 257 break; /* Maximum, larger pre won't work either */ 258 if (sensor->extclk_freq * (u64)new_mult < AR0521_PLL_MIN * 259 new_pre) 260 continue; 261 if (sensor->extclk_freq * (u64)new_mult > AR0521_PLL_MAX * 262 new_pre) 263 break; /* Larger pre won't work either */ 264 new_pll = div64_round_up(sensor->extclk_freq * (u64)new_mult, 265 new_pre); 266 if (new_pll < pll) { 267 pll = new_pll; 268 pre = new_pre; 269 mult = new_mult; 270 } 271 } 272 273 pll = div64_round(sensor->extclk_freq * (u64)mult, pre); 274 *pre_ptr = pre; 275 *mult_ptr = mult; 276 return pll; 277 } 278 279 static void ar0521_calc_pll(struct ar0521_dev *sensor) 280 { 281 unsigned int pixel_clock; 282 u16 pre, mult; 283 u32 vco; 284 int bpp; 285 286 /* 287 * PLL1 and PLL2 are computed equally even if the application note 288 * suggests a slower PLL1 clock. Maintain pll1 and pll2 divider and 289 * multiplier separated to later specialize the calculation procedure. 290 * 291 * PLL1: 292 * - mclk -> / pre_div1 * pre_mul1 = VCO1 = COUNTER_CLOCK 293 * 294 * PLL2: 295 * - mclk -> / pre_div * pre_mul = VCO 296 * 297 * VCO -> / vt_pix = PIXEL_CLOCK 298 * VCO -> / vt_pix / 2 = WORD_CLOCK 299 * VCO -> / op_sys = SERIAL_CLOCK 300 * 301 * With: 302 * - vt_pix = bpp / 2 303 * - WORD_CLOCK = PIXEL_CLOCK / 2 304 * - SERIAL_CLOCK = MIPI data rate (Mbps / lane) = WORD_CLOCK * bpp 305 * NOTE: this implies the MIPI clock is divided internally by 2 306 * to account for DDR. 307 * 308 * As op_sys_div is fixed to 1: 309 * 310 * SERIAL_CLOCK = VCO 311 * VCO = 2 * MIPI_CLK 312 * VCO = PIXEL_CLOCK * bpp / 2 313 * 314 * In the clock tree: 315 * MIPI_CLK = PIXEL_CLOCK * bpp / 2 / 2 316 * 317 * Generic pixel_rate to bus clock frequencey equation: 318 * MIPI_CLK = V4L2_CID_PIXEL_RATE * bpp / lanes / 2 319 * 320 * From which we derive the PIXEL_CLOCK to use in the clock tree: 321 * PIXEL_CLOCK = V4L2_CID_PIXEL_RATE * 2 / lanes 322 * 323 * Documented clock ranges: 324 * WORD_CLOCK = (35MHz - 120 MHz) 325 * PIXEL_CLOCK = (84MHz - 207MHz) 326 * VCO = (320MHz - 1280MHz) 327 * 328 * TODO: in case we have less data lanes we have to reduce the desired 329 * VCO not to exceed the limits specified by the datasheet and 330 * consequentially reduce the obtained pixel clock. 331 */ 332 pixel_clock = AR0521_PIXEL_CLOCK_RATE * 2 / sensor->lane_count; 333 bpp = ar0521_code_to_bpp(sensor); 334 sensor->pll.vt_pix = bpp / 2; 335 vco = pixel_clock * sensor->pll.vt_pix; 336 337 calc_pll(sensor, vco, &pre, &mult); 338 339 sensor->pll.pre = sensor->pll.pre2 = pre; 340 sensor->pll.mult = sensor->pll.mult2 = mult; 341 } 342 343 static int ar0521_pll_config(struct ar0521_dev *sensor) 344 { 345 __be16 pll_regs[] = { 346 be(AR0521_REG_VT_PIX_CLK_DIV), 347 /* 0x300 */ be(sensor->pll.vt_pix), /* vt_pix_clk_div = bpp / 2 */ 348 /* 0x302 */ be(1), /* vt_sys_clk_div */ 349 /* 0x304 */ be((sensor->pll.pre2 << 8) | sensor->pll.pre), 350 /* 0x306 */ be((sensor->pll.mult2 << 8) | sensor->pll.mult), 351 /* 0x308 */ be(sensor->pll.vt_pix * 2), /* op_pix_clk_div = 2 * vt_pix_clk_div */ 352 /* 0x30A */ be(1) /* op_sys_clk_div */ 353 }; 354 355 ar0521_calc_pll(sensor); 356 return ar0521_write_regs(sensor, pll_regs, ARRAY_SIZE(pll_regs)); 357 } 358 359 static int ar0521_set_stream(struct ar0521_dev *sensor, bool on) 360 { 361 int ret; 362 363 if (on) { 364 ret = pm_runtime_resume_and_get(&sensor->i2c_client->dev); 365 if (ret < 0) 366 return ret; 367 368 /* Stop streaming for just a moment */ 369 ret = ar0521_write_reg(sensor, AR0521_REG_RESET, 370 AR0521_REG_RESET_DEFAULTS); 371 if (ret) 372 return ret; 373 374 ret = ar0521_set_geometry(sensor); 375 if (ret) 376 return ret; 377 378 ret = ar0521_pll_config(sensor); 379 if (ret) 380 goto err; 381 382 ret = __v4l2_ctrl_handler_setup(&sensor->ctrls.handler); 383 if (ret) 384 goto err; 385 386 /* Exit LP-11 mode on clock and data lanes */ 387 ret = ar0521_write_reg(sensor, AR0521_REG_HISPI_CONTROL_STATUS, 388 0); 389 if (ret) 390 goto err; 391 392 /* Start streaming */ 393 ret = ar0521_write_reg(sensor, AR0521_REG_RESET, 394 AR0521_REG_RESET_DEFAULTS | 395 AR0521_REG_RESET_STREAM); 396 if (ret) 397 goto err; 398 399 return 0; 400 401 err: 402 pm_runtime_put(&sensor->i2c_client->dev); 403 return ret; 404 405 } else { 406 /* 407 * Reset gain, the sensor may produce all white pixels without 408 * this 409 */ 410 ret = ar0521_write_reg(sensor, AR0521_REG_GLOBAL_GAIN, 0x2000); 411 if (ret) 412 return ret; 413 414 /* Stop streaming */ 415 ret = ar0521_write_reg(sensor, AR0521_REG_RESET, 416 AR0521_REG_RESET_DEFAULTS); 417 if (ret) 418 return ret; 419 420 pm_runtime_put(&sensor->i2c_client->dev); 421 return 0; 422 } 423 } 424 425 static void ar0521_adj_fmt(struct v4l2_mbus_framefmt *fmt) 426 { 427 fmt->width = clamp(ALIGN(fmt->width, 4), AR0521_WIDTH_MIN, 428 AR0521_WIDTH_MAX); 429 fmt->height = clamp(ALIGN(fmt->height, 4), AR0521_HEIGHT_MIN, 430 AR0521_HEIGHT_MAX); 431 fmt->code = MEDIA_BUS_FMT_SGRBG8_1X8; 432 fmt->field = V4L2_FIELD_NONE; 433 fmt->colorspace = V4L2_COLORSPACE_SRGB; 434 fmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT; 435 fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE; 436 fmt->xfer_func = V4L2_XFER_FUNC_DEFAULT; 437 } 438 439 static int ar0521_get_fmt(struct v4l2_subdev *sd, 440 struct v4l2_subdev_state *sd_state, 441 struct v4l2_subdev_format *format) 442 { 443 struct ar0521_dev *sensor = to_ar0521_dev(sd); 444 struct v4l2_mbus_framefmt *fmt; 445 446 mutex_lock(&sensor->lock); 447 448 if (format->which == V4L2_SUBDEV_FORMAT_TRY) 449 fmt = v4l2_subdev_get_try_format(&sensor->sd, sd_state, 0 450 /* pad */); 451 else 452 fmt = &sensor->fmt; 453 454 format->format = *fmt; 455 456 mutex_unlock(&sensor->lock); 457 return 0; 458 } 459 460 static int ar0521_set_fmt(struct v4l2_subdev *sd, 461 struct v4l2_subdev_state *sd_state, 462 struct v4l2_subdev_format *format) 463 { 464 struct ar0521_dev *sensor = to_ar0521_dev(sd); 465 int max_vblank, max_hblank, exposure_max; 466 int ret; 467 468 ar0521_adj_fmt(&format->format); 469 470 mutex_lock(&sensor->lock); 471 472 if (format->which == V4L2_SUBDEV_FORMAT_TRY) { 473 struct v4l2_mbus_framefmt *fmt; 474 475 fmt = v4l2_subdev_get_try_format(sd, sd_state, 0 /* pad */); 476 *fmt = format->format; 477 478 mutex_unlock(&sensor->lock); 479 480 return 0; 481 } 482 483 sensor->fmt = format->format; 484 ar0521_calc_pll(sensor); 485 486 /* 487 * Update the exposure and blankings limits. Blankings are also reset 488 * to the minimum. 489 */ 490 max_hblank = AR0521_TOTAL_WIDTH_MAX - sensor->fmt.width; 491 ret = __v4l2_ctrl_modify_range(sensor->ctrls.hblank, 492 sensor->ctrls.hblank->minimum, 493 max_hblank, sensor->ctrls.hblank->step, 494 sensor->ctrls.hblank->minimum); 495 if (ret) 496 goto unlock; 497 498 ret = __v4l2_ctrl_s_ctrl(sensor->ctrls.hblank, 499 sensor->ctrls.hblank->minimum); 500 if (ret) 501 goto unlock; 502 503 max_vblank = AR0521_TOTAL_HEIGHT_MAX - sensor->fmt.height; 504 ret = __v4l2_ctrl_modify_range(sensor->ctrls.vblank, 505 sensor->ctrls.vblank->minimum, 506 max_vblank, sensor->ctrls.vblank->step, 507 sensor->ctrls.vblank->minimum); 508 if (ret) 509 goto unlock; 510 511 ret = __v4l2_ctrl_s_ctrl(sensor->ctrls.vblank, 512 sensor->ctrls.vblank->minimum); 513 if (ret) 514 goto unlock; 515 516 exposure_max = sensor->fmt.height + AR0521_HEIGHT_BLANKING_MIN - 4; 517 ret = __v4l2_ctrl_modify_range(sensor->ctrls.exposure, 518 sensor->ctrls.exposure->minimum, 519 exposure_max, 520 sensor->ctrls.exposure->step, 521 sensor->ctrls.exposure->default_value); 522 unlock: 523 mutex_unlock(&sensor->lock); 524 525 return ret; 526 } 527 528 static int ar0521_s_ctrl(struct v4l2_ctrl *ctrl) 529 { 530 struct v4l2_subdev *sd = ctrl_to_sd(ctrl); 531 struct ar0521_dev *sensor = to_ar0521_dev(sd); 532 int exp_max; 533 int ret; 534 535 /* v4l2_ctrl_lock() locks our own mutex */ 536 537 switch (ctrl->id) { 538 case V4L2_CID_VBLANK: 539 exp_max = sensor->fmt.height + ctrl->val - 4; 540 __v4l2_ctrl_modify_range(sensor->ctrls.exposure, 541 sensor->ctrls.exposure->minimum, 542 exp_max, sensor->ctrls.exposure->step, 543 sensor->ctrls.exposure->default_value); 544 break; 545 } 546 547 /* access the sensor only if it's powered up */ 548 if (!pm_runtime_get_if_in_use(&sensor->i2c_client->dev)) 549 return 0; 550 551 switch (ctrl->id) { 552 case V4L2_CID_HBLANK: 553 case V4L2_CID_VBLANK: 554 ret = ar0521_set_geometry(sensor); 555 break; 556 case V4L2_CID_ANALOGUE_GAIN: 557 ret = ar0521_write_reg(sensor, AR0521_REG_ANA_GAIN_CODE_GLOBAL, 558 ctrl->val); 559 break; 560 case V4L2_CID_GAIN: 561 case V4L2_CID_RED_BALANCE: 562 case V4L2_CID_BLUE_BALANCE: 563 ret = ar0521_set_gains(sensor); 564 break; 565 case V4L2_CID_EXPOSURE: 566 ret = ar0521_write_reg(sensor, 567 AR0521_REG_COARSE_INTEGRATION_TIME, 568 ctrl->val); 569 break; 570 case V4L2_CID_TEST_PATTERN: 571 ret = ar0521_write_reg(sensor, AR0521_REG_TEST_PATTERN_MODE, 572 ctrl->val); 573 break; 574 default: 575 dev_err(&sensor->i2c_client->dev, 576 "Unsupported control %x\n", ctrl->id); 577 ret = -EINVAL; 578 break; 579 } 580 581 pm_runtime_put(&sensor->i2c_client->dev); 582 return ret; 583 } 584 585 static const struct v4l2_ctrl_ops ar0521_ctrl_ops = { 586 .s_ctrl = ar0521_s_ctrl, 587 }; 588 589 static const char * const test_pattern_menu[] = { 590 "Disabled", 591 "Solid color", 592 "Color bars", 593 "Faded color bars" 594 }; 595 596 static int ar0521_init_controls(struct ar0521_dev *sensor) 597 { 598 const struct v4l2_ctrl_ops *ops = &ar0521_ctrl_ops; 599 struct ar0521_ctrls *ctrls = &sensor->ctrls; 600 struct v4l2_ctrl_handler *hdl = &ctrls->handler; 601 int max_vblank, max_hblank, exposure_max; 602 struct v4l2_ctrl *link_freq; 603 int ret; 604 605 v4l2_ctrl_handler_init(hdl, 32); 606 607 /* We can use our own mutex for the ctrl lock */ 608 hdl->lock = &sensor->lock; 609 610 /* Analog gain */ 611 v4l2_ctrl_new_std(hdl, ops, V4L2_CID_ANALOGUE_GAIN, 612 AR0521_ANA_GAIN_MIN, AR0521_ANA_GAIN_MAX, 613 AR0521_ANA_GAIN_STEP, AR0521_ANA_GAIN_DEFAULT); 614 615 /* Manual gain */ 616 ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN, 0, 511, 1, 0); 617 ctrls->red_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_RED_BALANCE, 618 -512, 511, 1, 0); 619 ctrls->blue_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BLUE_BALANCE, 620 -512, 511, 1, 0); 621 v4l2_ctrl_cluster(3, &ctrls->gain); 622 623 /* Initialize blanking limits using the default 2592x1944 format. */ 624 max_hblank = AR0521_TOTAL_WIDTH_MAX - AR0521_WIDTH_MAX; 625 ctrls->hblank = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HBLANK, 626 AR0521_WIDTH_BLANKING_MIN, 627 max_hblank, 1, 628 AR0521_WIDTH_BLANKING_MIN); 629 630 max_vblank = AR0521_TOTAL_HEIGHT_MAX - AR0521_HEIGHT_MAX; 631 ctrls->vblank = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VBLANK, 632 AR0521_HEIGHT_BLANKING_MIN, 633 max_vblank, 2, 634 AR0521_HEIGHT_BLANKING_MIN); 635 v4l2_ctrl_cluster(2, &ctrls->hblank); 636 637 /* Read-only */ 638 ctrls->pixrate = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_PIXEL_RATE, 639 AR0521_PIXEL_CLOCK_MIN, 640 AR0521_PIXEL_CLOCK_MAX, 1, 641 AR0521_PIXEL_CLOCK_RATE); 642 643 /* Manual exposure time: max exposure time = visible + blank - 4 */ 644 exposure_max = AR0521_HEIGHT_MAX + AR0521_HEIGHT_BLANKING_MIN - 4; 645 ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE, 0, 646 exposure_max, 1, 0x70); 647 648 link_freq = v4l2_ctrl_new_int_menu(hdl, ops, V4L2_CID_LINK_FREQ, 649 ARRAY_SIZE(ar0521_link_frequencies) - 1, 650 0, ar0521_link_frequencies); 651 if (link_freq) 652 link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY; 653 654 ctrls->test_pattern = v4l2_ctrl_new_std_menu_items(hdl, ops, 655 V4L2_CID_TEST_PATTERN, 656 ARRAY_SIZE(test_pattern_menu) - 1, 657 0, 0, test_pattern_menu); 658 659 if (hdl->error) { 660 ret = hdl->error; 661 goto free_ctrls; 662 } 663 664 sensor->sd.ctrl_handler = hdl; 665 return 0; 666 667 free_ctrls: 668 v4l2_ctrl_handler_free(hdl); 669 return ret; 670 } 671 672 #define REGS_ENTRY(a) {(a), ARRAY_SIZE(a)} 673 #define REGS(...) REGS_ENTRY(((const __be16[]){__VA_ARGS__})) 674 675 static const struct initial_reg { 676 const __be16 *data; /* data[0] is register address */ 677 unsigned int count; 678 } initial_regs[] = { 679 REGS(be(0x0112), be(0x0808)), /* 8-bit/8-bit mode */ 680 681 /* PEDESTAL+2 :+2 is a workaround for 10bit mode +0.5 rounding */ 682 REGS(be(0x301E), be(0x00AA)), 683 684 /* corrections_recommended_bayer */ 685 REGS(be(0x3042), 686 be(0x0004), /* 3042: RNC: enable b/w rnc mode */ 687 be(0x4580)), /* 3044: RNC: enable row noise correction */ 688 689 REGS(be(0x30D2), 690 be(0x0000), /* 30D2: CRM/CC: enable crm on Visible and CC rows */ 691 be(0x0000), /* 30D4: CC: CC enabled with 16 samples per column */ 692 /* 30D6: CC: bw mode enabled/12 bit data resolution/bw mode */ 693 be(0x2FFF)), 694 695 REGS(be(0x30DA), 696 be(0x0FFF), /* 30DA: CC: column correction clip level 2 is 0 */ 697 be(0x0FFF), /* 30DC: CC: column correction clip level 3 is 0 */ 698 be(0x0000)), /* 30DE: CC: Group FPN correction */ 699 700 /* RNC: rnc scaling factor = * 54 / 64 (32 / 38 * 64 = 53.9) */ 701 REGS(be(0x30EE), be(0x1136)), 702 REGS(be(0x30FA), be(0xFD00)), /* GPIO0 = flash, GPIO1 = shutter */ 703 REGS(be(0x3120), be(0x0005)), /* p1 dither enabled for 10bit mode */ 704 REGS(be(0x3172), be(0x0206)), /* txlo clk divider options */ 705 /* FDOC:fdoc settings with fdoc every frame turned of */ 706 REGS(be(0x3180), be(0x9434)), 707 708 REGS(be(0x31B0), 709 be(0x008B), /* 31B0: frame_preamble - FIXME check WRT lanes# */ 710 be(0x0050)), /* 31B2: line_preamble - FIXME check WRT lanes# */ 711 712 /* don't use continuous clock mode while shut down */ 713 REGS(be(0x31BC), be(0x068C)), 714 REGS(be(0x31E0), be(0x0781)), /* Fuse/2DDC: enable 2ddc */ 715 716 /* analog_setup_recommended_10bit */ 717 REGS(be(0x341A), be(0x4735)), /* Samp&Hold pulse in ADC */ 718 REGS(be(0x3420), be(0x4735)), /* Samp&Hold pulse in ADC */ 719 REGS(be(0x3426), be(0x8A1A)), /* ADC offset distribution pulse */ 720 REGS(be(0x342A), be(0x0018)), /* pulse_config */ 721 722 /* pixel_timing_recommended */ 723 REGS(be(0x3D00), 724 /* 3D00 */ be(0x043E), be(0x4760), be(0xFFFF), be(0xFFFF), 725 /* 3D08 */ be(0x8000), be(0x0510), be(0xAF08), be(0x0252), 726 /* 3D10 */ be(0x486F), be(0x5D5D), be(0x8056), be(0x8313), 727 /* 3D18 */ be(0x0087), be(0x6A48), be(0x6982), be(0x0280), 728 /* 3D20 */ be(0x8359), be(0x8D02), be(0x8020), be(0x4882), 729 /* 3D28 */ be(0x4269), be(0x6A95), be(0x5988), be(0x5A83), 730 /* 3D30 */ be(0x5885), be(0x6280), be(0x6289), be(0x6097), 731 /* 3D38 */ be(0x5782), be(0x605C), be(0xBF18), be(0x0961), 732 /* 3D40 */ be(0x5080), be(0x2090), be(0x4390), be(0x4382), 733 /* 3D48 */ be(0x5F8A), be(0x5D5D), be(0x9C63), be(0x8063), 734 /* 3D50 */ be(0xA960), be(0x9757), be(0x8260), be(0x5CFF), 735 /* 3D58 */ be(0xBF10), be(0x1681), be(0x0802), be(0x8000), 736 /* 3D60 */ be(0x141C), be(0x6000), be(0x6022), be(0x4D80), 737 /* 3D68 */ be(0x5C97), be(0x6A69), be(0xAC6F), be(0x4645), 738 /* 3D70 */ be(0x4400), be(0x0513), be(0x8069), be(0x6AC6), 739 /* 3D78 */ be(0x5F95), be(0x5F70), be(0x8040), be(0x4A81), 740 /* 3D80 */ be(0x0300), be(0xE703), be(0x0088), be(0x4A83), 741 /* 3D88 */ be(0x40FF), be(0xFFFF), be(0xFD70), be(0x8040), 742 /* 3D90 */ be(0x4A85), be(0x4FA8), be(0x4F8C), be(0x0070), 743 /* 3D98 */ be(0xBE47), be(0x8847), be(0xBC78), be(0x6B89), 744 /* 3DA0 */ be(0x6A80), be(0x6986), be(0x6B8E), be(0x6B80), 745 /* 3DA8 */ be(0x6980), be(0x6A88), be(0x7C9F), be(0x866B), 746 /* 3DB0 */ be(0x8765), be(0x46FF), be(0xE365), be(0xA679), 747 /* 3DB8 */ be(0x4A40), be(0x4580), be(0x44BC), be(0x7000), 748 /* 3DC0 */ be(0x8040), be(0x0802), be(0x10EF), be(0x0104), 749 /* 3DC8 */ be(0x3860), be(0x5D5D), be(0x5682), be(0x1300), 750 /* 3DD0 */ be(0x8648), be(0x8202), be(0x8082), be(0x598A), 751 /* 3DD8 */ be(0x0280), be(0x2048), be(0x3060), be(0x8042), 752 /* 3DE0 */ be(0x9259), be(0x865A), be(0x8258), be(0x8562), 753 /* 3DE8 */ be(0x8062), be(0x8560), be(0x9257), be(0x8221), 754 /* 3DF0 */ be(0x10FF), be(0xB757), be(0x9361), be(0x1019), 755 /* 3DF8 */ be(0x8020), be(0x9043), be(0x8E43), be(0x845F), 756 /* 3E00 */ be(0x835D), be(0x805D), be(0x8163), be(0x8063), 757 /* 3E08 */ be(0xA060), be(0x9157), be(0x8260), be(0x5CFF), 758 /* 3E10 */ be(0xFFFF), be(0xFFE5), be(0x1016), be(0x2048), 759 /* 3E18 */ be(0x0802), be(0x1C60), be(0x0014), be(0x0060), 760 /* 3E20 */ be(0x2205), be(0x8120), be(0x908F), be(0x6A80), 761 /* 3E28 */ be(0x6982), be(0x5F9F), be(0x6F46), be(0x4544), 762 /* 3E30 */ be(0x0005), be(0x8013), be(0x8069), be(0x6A80), 763 /* 3E38 */ be(0x7000), be(0x0000), be(0x0000), be(0x0000), 764 /* 3E40 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 765 /* 3E48 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 766 /* 3E50 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 767 /* 3E58 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 768 /* 3E60 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 769 /* 3E68 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 770 /* 3E70 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 771 /* 3E78 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 772 /* 3E80 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 773 /* 3E88 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 774 /* 3E90 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 775 /* 3E98 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 776 /* 3EA0 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 777 /* 3EA8 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 778 /* 3EB0 */ be(0x0000), be(0x0000), be(0x0000)), 779 780 REGS(be(0x3EB6), be(0x004C)), /* ECL */ 781 782 REGS(be(0x3EBA), 783 be(0xAAAD), /* 3EBA */ 784 be(0x0086)), /* 3EBC: Bias currents for FSC/ECL */ 785 786 REGS(be(0x3EC0), 787 be(0x1E00), /* 3EC0: SFbin/SH mode settings */ 788 be(0x100A), /* 3EC2: CLK divider for ramp for 10 bit 400MH */ 789 /* 3EC4: FSC clamps for HDR mode and adc comp power down co */ 790 be(0x3300), 791 be(0xEA44), /* 3EC6: VLN and clk gating controls */ 792 be(0x6F6F), /* 3EC8: Txl0 and Txlo1 settings for normal mode */ 793 be(0x2F4A), /* 3ECA: CDAC/Txlo2/RSTGHI/RSTGLO settings */ 794 be(0x0506), /* 3ECC: RSTDHI/RSTDLO/CDAC/TXHI settings */ 795 /* 3ECE: Ramp buffer settings and Booster enable (bits 0-5) */ 796 be(0x203B), 797 be(0x13F0), /* 3ED0: TXLO from atest/sf bin settings */ 798 be(0xA53D), /* 3ED2: Ramp offset */ 799 be(0x862F), /* 3ED4: TXLO open loop/row driver settings */ 800 be(0x4081), /* 3ED6: Txlatch fr cfpn rows/vln bias */ 801 be(0x8003), /* 3ED8: Ramp step setting for 10 bit 400 Mhz */ 802 be(0xA580), /* 3EDA: Ramp Offset */ 803 be(0xC000), /* 3EDC: over range for rst and under range for sig */ 804 be(0xC103)), /* 3EDE: over range for sig and col dec clk settings */ 805 806 /* corrections_recommended_bayer */ 807 REGS(be(0x3F00), 808 be(0x0017), /* 3F00: BM_T0 */ 809 be(0x02DD), /* 3F02: BM_T1 */ 810 /* 3F04: if Ana_gain less than 2, use noise_floor0, multipl */ 811 be(0x0020), 812 /* 3F06: if Ana_gain between 4 and 7, use noise_floor2 and */ 813 be(0x0040), 814 /* 3F08: if Ana_gain between 4 and 7, use noise_floor2 and */ 815 be(0x0070), 816 /* 3F0A: Define noise_floor0(low address) and noise_floor1 */ 817 be(0x0101), 818 be(0x0302)), /* 3F0C: Define noise_floor2 and noise_floor3 */ 819 820 REGS(be(0x3F10), 821 be(0x0505), /* 3F10: single k factor 0 */ 822 be(0x0505), /* 3F12: single k factor 1 */ 823 be(0x0505), /* 3F14: single k factor 2 */ 824 be(0x01FF), /* 3F16: cross factor 0 */ 825 be(0x01FF), /* 3F18: cross factor 1 */ 826 be(0x01FF), /* 3F1A: cross factor 2 */ 827 be(0x0022)), /* 3F1E */ 828 829 /* GTH_THRES_RTN: 4max,4min filtered out of every 46 samples and */ 830 REGS(be(0x3F2C), be(0x442E)), 831 832 REGS(be(0x3F3E), 833 be(0x0000), /* 3F3E: Switch ADC from 12 bit to 10 bit mode */ 834 be(0x1511), /* 3F40: couple k factor 0 */ 835 be(0x1511), /* 3F42: couple k factor 1 */ 836 be(0x0707)), /* 3F44: couple k factor 2 */ 837 }; 838 839 static int ar0521_power_off(struct device *dev) 840 { 841 struct v4l2_subdev *sd = dev_get_drvdata(dev); 842 struct ar0521_dev *sensor = to_ar0521_dev(sd); 843 int i; 844 845 clk_disable_unprepare(sensor->extclk); 846 847 if (sensor->reset_gpio) 848 gpiod_set_value(sensor->reset_gpio, 1); /* assert RESET signal */ 849 850 for (i = ARRAY_SIZE(ar0521_supply_names) - 1; i >= 0; i--) { 851 if (sensor->supplies[i]) 852 regulator_disable(sensor->supplies[i]); 853 } 854 return 0; 855 } 856 857 static int ar0521_power_on(struct device *dev) 858 { 859 struct v4l2_subdev *sd = dev_get_drvdata(dev); 860 struct ar0521_dev *sensor = to_ar0521_dev(sd); 861 unsigned int cnt; 862 int ret; 863 864 for (cnt = 0; cnt < ARRAY_SIZE(ar0521_supply_names); cnt++) 865 if (sensor->supplies[cnt]) { 866 ret = regulator_enable(sensor->supplies[cnt]); 867 if (ret < 0) 868 goto off; 869 870 usleep_range(1000, 1500); /* min 1 ms */ 871 } 872 873 ret = clk_prepare_enable(sensor->extclk); 874 if (ret < 0) { 875 v4l2_err(&sensor->sd, "error enabling sensor clock\n"); 876 goto off; 877 } 878 usleep_range(1000, 1500); /* min 1 ms */ 879 880 if (sensor->reset_gpio) 881 /* deassert RESET signal */ 882 gpiod_set_value(sensor->reset_gpio, 0); 883 usleep_range(4500, 5000); /* min 45000 clocks */ 884 885 for (cnt = 0; cnt < ARRAY_SIZE(initial_regs); cnt++) { 886 ret = ar0521_write_regs(sensor, initial_regs[cnt].data, 887 initial_regs[cnt].count); 888 if (ret) 889 goto off; 890 } 891 892 ret = ar0521_write_reg(sensor, AR0521_REG_SERIAL_FORMAT, 893 AR0521_REG_SERIAL_FORMAT_MIPI | 894 sensor->lane_count); 895 if (ret) 896 goto off; 897 898 /* set MIPI test mode - disabled for now */ 899 ret = ar0521_write_reg(sensor, AR0521_REG_HISPI_TEST_MODE, 900 ((0x40 << sensor->lane_count) - 0x40) | 901 AR0521_REG_HISPI_TEST_MODE_LP11); 902 if (ret) 903 goto off; 904 905 ret = ar0521_write_reg(sensor, AR0521_REG_ROW_SPEED, 0x110 | 906 4 / sensor->lane_count); 907 if (ret) 908 goto off; 909 910 return 0; 911 off: 912 ar0521_power_off(dev); 913 return ret; 914 } 915 916 static int ar0521_enum_mbus_code(struct v4l2_subdev *sd, 917 struct v4l2_subdev_state *sd_state, 918 struct v4l2_subdev_mbus_code_enum *code) 919 { 920 struct ar0521_dev *sensor = to_ar0521_dev(sd); 921 922 if (code->index) 923 return -EINVAL; 924 925 code->code = sensor->fmt.code; 926 return 0; 927 } 928 929 static int ar0521_enum_frame_size(struct v4l2_subdev *sd, 930 struct v4l2_subdev_state *sd_state, 931 struct v4l2_subdev_frame_size_enum *fse) 932 { 933 if (fse->index) 934 return -EINVAL; 935 936 if (fse->code != MEDIA_BUS_FMT_SGRBG8_1X8) 937 return -EINVAL; 938 939 fse->min_width = AR0521_WIDTH_MIN; 940 fse->max_width = AR0521_WIDTH_MAX; 941 fse->min_height = AR0521_HEIGHT_MIN; 942 fse->max_height = AR0521_HEIGHT_MAX; 943 944 return 0; 945 } 946 947 static int ar0521_pre_streamon(struct v4l2_subdev *sd, u32 flags) 948 { 949 struct ar0521_dev *sensor = to_ar0521_dev(sd); 950 int ret; 951 952 if (!(flags & V4L2_SUBDEV_PRE_STREAMON_FL_MANUAL_LP)) 953 return -EACCES; 954 955 ret = pm_runtime_resume_and_get(&sensor->i2c_client->dev); 956 if (ret < 0) 957 return ret; 958 959 /* Set LP-11 on clock and data lanes */ 960 ret = ar0521_write_reg(sensor, AR0521_REG_HISPI_CONTROL_STATUS, 961 AR0521_REG_HISPI_CONTROL_STATUS_FRAMER_TEST_MODE_ENABLE); 962 if (ret) 963 goto err; 964 965 /* Start streaming LP-11 */ 966 ret = ar0521_write_reg(sensor, AR0521_REG_RESET, 967 AR0521_REG_RESET_DEFAULTS | 968 AR0521_REG_RESET_STREAM); 969 if (ret) 970 goto err; 971 return 0; 972 973 err: 974 pm_runtime_put(&sensor->i2c_client->dev); 975 return ret; 976 } 977 978 static int ar0521_post_streamoff(struct v4l2_subdev *sd) 979 { 980 struct ar0521_dev *sensor = to_ar0521_dev(sd); 981 982 pm_runtime_put(&sensor->i2c_client->dev); 983 return 0; 984 } 985 986 static int ar0521_s_stream(struct v4l2_subdev *sd, int enable) 987 { 988 struct ar0521_dev *sensor = to_ar0521_dev(sd); 989 int ret; 990 991 mutex_lock(&sensor->lock); 992 ret = ar0521_set_stream(sensor, enable); 993 mutex_unlock(&sensor->lock); 994 995 return ret; 996 } 997 998 static const struct v4l2_subdev_core_ops ar0521_core_ops = { 999 .log_status = v4l2_ctrl_subdev_log_status, 1000 }; 1001 1002 static const struct v4l2_subdev_video_ops ar0521_video_ops = { 1003 .s_stream = ar0521_s_stream, 1004 .pre_streamon = ar0521_pre_streamon, 1005 .post_streamoff = ar0521_post_streamoff, 1006 }; 1007 1008 static const struct v4l2_subdev_pad_ops ar0521_pad_ops = { 1009 .enum_mbus_code = ar0521_enum_mbus_code, 1010 .enum_frame_size = ar0521_enum_frame_size, 1011 .get_fmt = ar0521_get_fmt, 1012 .set_fmt = ar0521_set_fmt, 1013 }; 1014 1015 static const struct v4l2_subdev_ops ar0521_subdev_ops = { 1016 .core = &ar0521_core_ops, 1017 .video = &ar0521_video_ops, 1018 .pad = &ar0521_pad_ops, 1019 }; 1020 1021 static int ar0521_probe(struct i2c_client *client) 1022 { 1023 struct v4l2_fwnode_endpoint ep = { 1024 .bus_type = V4L2_MBUS_CSI2_DPHY 1025 }; 1026 struct device *dev = &client->dev; 1027 struct fwnode_handle *endpoint; 1028 struct ar0521_dev *sensor; 1029 unsigned int cnt; 1030 int ret; 1031 1032 sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL); 1033 if (!sensor) 1034 return -ENOMEM; 1035 1036 sensor->i2c_client = client; 1037 sensor->fmt.width = AR0521_WIDTH_MAX; 1038 sensor->fmt.height = AR0521_HEIGHT_MAX; 1039 1040 endpoint = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), 0, 0, 1041 FWNODE_GRAPH_ENDPOINT_NEXT); 1042 if (!endpoint) { 1043 dev_err(dev, "endpoint node not found\n"); 1044 return -EINVAL; 1045 } 1046 1047 ret = v4l2_fwnode_endpoint_parse(endpoint, &ep); 1048 fwnode_handle_put(endpoint); 1049 if (ret) { 1050 dev_err(dev, "could not parse endpoint\n"); 1051 return ret; 1052 } 1053 1054 if (ep.bus_type != V4L2_MBUS_CSI2_DPHY) { 1055 dev_err(dev, "invalid bus type, must be MIPI CSI2\n"); 1056 return -EINVAL; 1057 } 1058 1059 sensor->lane_count = ep.bus.mipi_csi2.num_data_lanes; 1060 switch (sensor->lane_count) { 1061 case 1: 1062 case 2: 1063 case 4: 1064 break; 1065 default: 1066 dev_err(dev, "invalid number of MIPI data lanes\n"); 1067 return -EINVAL; 1068 } 1069 1070 /* Get master clock (extclk) */ 1071 sensor->extclk = devm_clk_get(dev, "extclk"); 1072 if (IS_ERR(sensor->extclk)) { 1073 dev_err(dev, "failed to get extclk\n"); 1074 return PTR_ERR(sensor->extclk); 1075 } 1076 1077 sensor->extclk_freq = clk_get_rate(sensor->extclk); 1078 1079 if (sensor->extclk_freq < AR0521_EXTCLK_MIN || 1080 sensor->extclk_freq > AR0521_EXTCLK_MAX) { 1081 dev_err(dev, "extclk frequency out of range: %u Hz\n", 1082 sensor->extclk_freq); 1083 return -EINVAL; 1084 } 1085 1086 /* Request optional reset pin (usually active low) and assert it */ 1087 sensor->reset_gpio = devm_gpiod_get_optional(dev, "reset", 1088 GPIOD_OUT_HIGH); 1089 1090 v4l2_i2c_subdev_init(&sensor->sd, client, &ar0521_subdev_ops); 1091 1092 sensor->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE; 1093 sensor->pad.flags = MEDIA_PAD_FL_SOURCE; 1094 sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; 1095 ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad); 1096 if (ret) 1097 return ret; 1098 1099 for (cnt = 0; cnt < ARRAY_SIZE(ar0521_supply_names); cnt++) { 1100 struct regulator *supply = devm_regulator_get(dev, 1101 ar0521_supply_names[cnt]); 1102 1103 if (IS_ERR(supply)) { 1104 dev_info(dev, "no %s regulator found: %li\n", 1105 ar0521_supply_names[cnt], PTR_ERR(supply)); 1106 return PTR_ERR(supply); 1107 } 1108 sensor->supplies[cnt] = supply; 1109 } 1110 1111 mutex_init(&sensor->lock); 1112 1113 ret = ar0521_init_controls(sensor); 1114 if (ret) 1115 goto entity_cleanup; 1116 1117 ar0521_adj_fmt(&sensor->fmt); 1118 1119 ret = v4l2_async_register_subdev(&sensor->sd); 1120 if (ret) 1121 goto free_ctrls; 1122 1123 /* Turn on the device and enable runtime PM */ 1124 ret = ar0521_power_on(&client->dev); 1125 if (ret) 1126 goto disable; 1127 pm_runtime_set_active(&client->dev); 1128 pm_runtime_enable(&client->dev); 1129 pm_runtime_idle(&client->dev); 1130 return 0; 1131 1132 disable: 1133 v4l2_async_unregister_subdev(&sensor->sd); 1134 media_entity_cleanup(&sensor->sd.entity); 1135 free_ctrls: 1136 v4l2_ctrl_handler_free(&sensor->ctrls.handler); 1137 entity_cleanup: 1138 media_entity_cleanup(&sensor->sd.entity); 1139 mutex_destroy(&sensor->lock); 1140 return ret; 1141 } 1142 1143 static void ar0521_remove(struct i2c_client *client) 1144 { 1145 struct v4l2_subdev *sd = i2c_get_clientdata(client); 1146 struct ar0521_dev *sensor = to_ar0521_dev(sd); 1147 1148 v4l2_async_unregister_subdev(&sensor->sd); 1149 media_entity_cleanup(&sensor->sd.entity); 1150 v4l2_ctrl_handler_free(&sensor->ctrls.handler); 1151 pm_runtime_disable(&client->dev); 1152 if (!pm_runtime_status_suspended(&client->dev)) 1153 ar0521_power_off(&client->dev); 1154 pm_runtime_set_suspended(&client->dev); 1155 mutex_destroy(&sensor->lock); 1156 } 1157 1158 static const struct dev_pm_ops ar0521_pm_ops = { 1159 SET_RUNTIME_PM_OPS(ar0521_power_off, ar0521_power_on, NULL) 1160 }; 1161 static const struct of_device_id ar0521_dt_ids[] = { 1162 {.compatible = "onnn,ar0521"}, 1163 {} 1164 }; 1165 MODULE_DEVICE_TABLE(of, ar0521_dt_ids); 1166 1167 static struct i2c_driver ar0521_i2c_driver = { 1168 .driver = { 1169 .name = "ar0521", 1170 .pm = &ar0521_pm_ops, 1171 .of_match_table = ar0521_dt_ids, 1172 }, 1173 .probe = ar0521_probe, 1174 .remove = ar0521_remove, 1175 }; 1176 1177 module_i2c_driver(ar0521_i2c_driver); 1178 1179 MODULE_DESCRIPTION("AR0521 MIPI Camera subdev driver"); 1180 MODULE_AUTHOR("Krzysztof Hałasa <khalasa@piap.pl>"); 1181 MODULE_LICENSE("GPL"); 1182