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 bool streaming; 138 }; 139 to_ar0521_dev(struct v4l2_subdev * sd)140 static inline struct ar0521_dev *to_ar0521_dev(struct v4l2_subdev *sd) 141 { 142 return container_of(sd, struct ar0521_dev, sd); 143 } 144 ctrl_to_sd(struct v4l2_ctrl * ctrl)145 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl) 146 { 147 return &container_of(ctrl->handler, struct ar0521_dev, 148 ctrls.handler)->sd; 149 } 150 div64_round(u64 v,u32 d)151 static u32 div64_round(u64 v, u32 d) 152 { 153 return div_u64(v + (d >> 1), d); 154 } 155 div64_round_up(u64 v,u32 d)156 static u32 div64_round_up(u64 v, u32 d) 157 { 158 return div_u64(v + d - 1, d); 159 } 160 ar0521_code_to_bpp(struct ar0521_dev * sensor)161 static int ar0521_code_to_bpp(struct ar0521_dev *sensor) 162 { 163 switch (sensor->fmt.code) { 164 case MEDIA_BUS_FMT_SGRBG8_1X8: 165 return 8; 166 } 167 168 return -EINVAL; 169 } 170 171 /* Data must be BE16, the first value is the register address */ ar0521_write_regs(struct ar0521_dev * sensor,const __be16 * data,unsigned int count)172 static int ar0521_write_regs(struct ar0521_dev *sensor, const __be16 *data, 173 unsigned int count) 174 { 175 struct i2c_client *client = sensor->i2c_client; 176 struct i2c_msg msg; 177 int ret; 178 179 msg.addr = client->addr; 180 msg.flags = client->flags; 181 msg.buf = (u8 *)data; 182 msg.len = count * sizeof(*data); 183 184 ret = i2c_transfer(client->adapter, &msg, 1); 185 186 if (ret < 0) { 187 v4l2_err(&sensor->sd, "%s: I2C write error\n", __func__); 188 return ret; 189 } 190 191 return 0; 192 } 193 ar0521_write_reg(struct ar0521_dev * sensor,u16 reg,u16 val)194 static int ar0521_write_reg(struct ar0521_dev *sensor, u16 reg, u16 val) 195 { 196 __be16 buf[2] = {be(reg), be(val)}; 197 198 return ar0521_write_regs(sensor, buf, 2); 199 } 200 ar0521_set_geometry(struct ar0521_dev * sensor)201 static int ar0521_set_geometry(struct ar0521_dev *sensor) 202 { 203 /* Center the image in the visible output window. */ 204 u16 x = clamp((AR0521_WIDTH_MAX - sensor->fmt.width) / 2, 205 AR0521_MIN_X_ADDR_START, AR0521_MAX_X_ADDR_END); 206 u16 y = clamp(((AR0521_HEIGHT_MAX - sensor->fmt.height) / 2) & ~1, 207 AR0521_MIN_Y_ADDR_START, AR0521_MAX_Y_ADDR_END); 208 209 /* All dimensions are unsigned 12-bit integers */ 210 __be16 regs[] = { 211 be(AR0521_REG_FRAME_LENGTH_LINES), 212 be(sensor->fmt.height + sensor->ctrls.vblank->val), 213 be(sensor->fmt.width + sensor->ctrls.hblank->val), 214 be(x), 215 be(y), 216 be(x + sensor->fmt.width - 1), 217 be(y + sensor->fmt.height - 1), 218 be(sensor->fmt.width), 219 be(sensor->fmt.height) 220 }; 221 222 return ar0521_write_regs(sensor, regs, ARRAY_SIZE(regs)); 223 } 224 ar0521_set_gains(struct ar0521_dev * sensor)225 static int ar0521_set_gains(struct ar0521_dev *sensor) 226 { 227 int green = sensor->ctrls.gain->val; 228 int red = max(green + sensor->ctrls.red_balance->val, 0); 229 int blue = max(green + sensor->ctrls.blue_balance->val, 0); 230 unsigned int gain = min(red, min(green, blue)); 231 unsigned int analog = min(gain, 64u); /* range is 0 - 127 */ 232 __be16 regs[5]; 233 234 red = min(red - analog + 64, 511u); 235 green = min(green - analog + 64, 511u); 236 blue = min(blue - analog + 64, 511u); 237 regs[0] = be(AR0521_REG_GREEN1_GAIN); 238 regs[1] = be(green << 7 | analog); 239 regs[2] = be(blue << 7 | analog); 240 regs[3] = be(red << 7 | analog); 241 regs[4] = be(green << 7 | analog); 242 243 return ar0521_write_regs(sensor, regs, ARRAY_SIZE(regs)); 244 } 245 calc_pll(struct ar0521_dev * sensor,u32 freq,u16 * pre_ptr,u16 * mult_ptr)246 static u32 calc_pll(struct ar0521_dev *sensor, u32 freq, u16 *pre_ptr, u16 *mult_ptr) 247 { 248 u16 pre = 1, mult = 1, new_pre; 249 u32 pll = AR0521_PLL_MAX + 1; 250 251 for (new_pre = 1; new_pre < 64; new_pre++) { 252 u32 new_pll; 253 u32 new_mult = div64_round_up((u64)freq * new_pre, 254 sensor->extclk_freq); 255 256 if (new_mult < 32) 257 continue; /* Minimum value */ 258 if (new_mult > 254) 259 break; /* Maximum, larger pre won't work either */ 260 if (sensor->extclk_freq * (u64)new_mult < (u64)AR0521_PLL_MIN * 261 new_pre) 262 continue; 263 if (sensor->extclk_freq * (u64)new_mult > (u64)AR0521_PLL_MAX * 264 new_pre) 265 break; /* Larger pre won't work either */ 266 new_pll = div64_round_up(sensor->extclk_freq * (u64)new_mult, 267 new_pre); 268 if (new_pll < pll) { 269 pll = new_pll; 270 pre = new_pre; 271 mult = new_mult; 272 } 273 } 274 275 pll = div64_round(sensor->extclk_freq * (u64)mult, pre); 276 *pre_ptr = pre; 277 *mult_ptr = mult; 278 return pll; 279 } 280 ar0521_calc_pll(struct ar0521_dev * sensor)281 static void ar0521_calc_pll(struct ar0521_dev *sensor) 282 { 283 unsigned int pixel_clock; 284 u16 pre, mult; 285 u32 vco; 286 int bpp; 287 288 /* 289 * PLL1 and PLL2 are computed equally even if the application note 290 * suggests a slower PLL1 clock. Maintain pll1 and pll2 divider and 291 * multiplier separated to later specialize the calculation procedure. 292 * 293 * PLL1: 294 * - mclk -> / pre_div1 * pre_mul1 = VCO1 = COUNTER_CLOCK 295 * 296 * PLL2: 297 * - mclk -> / pre_div * pre_mul = VCO 298 * 299 * VCO -> / vt_pix = PIXEL_CLOCK 300 * VCO -> / vt_pix / 2 = WORD_CLOCK 301 * VCO -> / op_sys = SERIAL_CLOCK 302 * 303 * With: 304 * - vt_pix = bpp / 2 305 * - WORD_CLOCK = PIXEL_CLOCK / 2 306 * - SERIAL_CLOCK = MIPI data rate (Mbps / lane) = WORD_CLOCK * bpp 307 * NOTE: this implies the MIPI clock is divided internally by 2 308 * to account for DDR. 309 * 310 * As op_sys_div is fixed to 1: 311 * 312 * SERIAL_CLOCK = VCO 313 * VCO = 2 * MIPI_CLK 314 * VCO = PIXEL_CLOCK * bpp / 2 315 * 316 * In the clock tree: 317 * MIPI_CLK = PIXEL_CLOCK * bpp / 2 / 2 318 * 319 * Generic pixel_rate to bus clock frequencey equation: 320 * MIPI_CLK = V4L2_CID_PIXEL_RATE * bpp / lanes / 2 321 * 322 * From which we derive the PIXEL_CLOCK to use in the clock tree: 323 * PIXEL_CLOCK = V4L2_CID_PIXEL_RATE * 2 / lanes 324 * 325 * Documented clock ranges: 326 * WORD_CLOCK = (35MHz - 120 MHz) 327 * PIXEL_CLOCK = (84MHz - 207MHz) 328 * VCO = (320MHz - 1280MHz) 329 * 330 * TODO: in case we have less data lanes we have to reduce the desired 331 * VCO not to exceed the limits specified by the datasheet and 332 * consequentially reduce the obtained pixel clock. 333 */ 334 pixel_clock = AR0521_PIXEL_CLOCK_RATE * 2 / sensor->lane_count; 335 bpp = ar0521_code_to_bpp(sensor); 336 sensor->pll.vt_pix = bpp / 2; 337 vco = pixel_clock * sensor->pll.vt_pix; 338 339 calc_pll(sensor, vco, &pre, &mult); 340 341 sensor->pll.pre = sensor->pll.pre2 = pre; 342 sensor->pll.mult = sensor->pll.mult2 = mult; 343 } 344 ar0521_pll_config(struct ar0521_dev * sensor)345 static int ar0521_pll_config(struct ar0521_dev *sensor) 346 { 347 __be16 pll_regs[] = { 348 be(AR0521_REG_VT_PIX_CLK_DIV), 349 /* 0x300 */ be(sensor->pll.vt_pix), /* vt_pix_clk_div = bpp / 2 */ 350 /* 0x302 */ be(1), /* vt_sys_clk_div */ 351 /* 0x304 */ be((sensor->pll.pre2 << 8) | sensor->pll.pre), 352 /* 0x306 */ be((sensor->pll.mult2 << 8) | sensor->pll.mult), 353 /* 0x308 */ be(sensor->pll.vt_pix * 2), /* op_pix_clk_div = 2 * vt_pix_clk_div */ 354 /* 0x30A */ be(1) /* op_sys_clk_div */ 355 }; 356 357 ar0521_calc_pll(sensor); 358 return ar0521_write_regs(sensor, pll_regs, ARRAY_SIZE(pll_regs)); 359 } 360 ar0521_set_stream(struct ar0521_dev * sensor,bool on)361 static int ar0521_set_stream(struct ar0521_dev *sensor, bool on) 362 { 363 int ret; 364 365 if (on) { 366 ret = pm_runtime_resume_and_get(&sensor->i2c_client->dev); 367 if (ret < 0) 368 return ret; 369 370 /* Stop streaming for just a moment */ 371 ret = ar0521_write_reg(sensor, AR0521_REG_RESET, 372 AR0521_REG_RESET_DEFAULTS); 373 if (ret) 374 return ret; 375 376 ret = ar0521_set_geometry(sensor); 377 if (ret) 378 return ret; 379 380 ret = ar0521_pll_config(sensor); 381 if (ret) 382 goto err; 383 384 ret = __v4l2_ctrl_handler_setup(&sensor->ctrls.handler); 385 if (ret) 386 goto err; 387 388 /* Exit LP-11 mode on clock and data lanes */ 389 ret = ar0521_write_reg(sensor, AR0521_REG_HISPI_CONTROL_STATUS, 390 0); 391 if (ret) 392 goto err; 393 394 /* Start streaming */ 395 ret = ar0521_write_reg(sensor, AR0521_REG_RESET, 396 AR0521_REG_RESET_DEFAULTS | 397 AR0521_REG_RESET_STREAM); 398 if (ret) 399 goto err; 400 401 return 0; 402 403 err: 404 pm_runtime_put(&sensor->i2c_client->dev); 405 return ret; 406 407 } else { 408 /* 409 * Reset gain, the sensor may produce all white pixels without 410 * this 411 */ 412 ret = ar0521_write_reg(sensor, AR0521_REG_GLOBAL_GAIN, 0x2000); 413 if (ret) 414 return ret; 415 416 /* Stop streaming */ 417 ret = ar0521_write_reg(sensor, AR0521_REG_RESET, 418 AR0521_REG_RESET_DEFAULTS); 419 if (ret) 420 return ret; 421 422 pm_runtime_put(&sensor->i2c_client->dev); 423 return 0; 424 } 425 } 426 ar0521_adj_fmt(struct v4l2_mbus_framefmt * fmt)427 static void ar0521_adj_fmt(struct v4l2_mbus_framefmt *fmt) 428 { 429 fmt->width = clamp(ALIGN(fmt->width, 4), AR0521_WIDTH_MIN, 430 AR0521_WIDTH_MAX); 431 fmt->height = clamp(ALIGN(fmt->height, 4), AR0521_HEIGHT_MIN, 432 AR0521_HEIGHT_MAX); 433 fmt->code = MEDIA_BUS_FMT_SGRBG8_1X8; 434 fmt->field = V4L2_FIELD_NONE; 435 fmt->colorspace = V4L2_COLORSPACE_SRGB; 436 fmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT; 437 fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE; 438 fmt->xfer_func = V4L2_XFER_FUNC_DEFAULT; 439 } 440 ar0521_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * format)441 static int ar0521_get_fmt(struct v4l2_subdev *sd, 442 struct v4l2_subdev_state *sd_state, 443 struct v4l2_subdev_format *format) 444 { 445 struct ar0521_dev *sensor = to_ar0521_dev(sd); 446 struct v4l2_mbus_framefmt *fmt; 447 448 mutex_lock(&sensor->lock); 449 450 if (format->which == V4L2_SUBDEV_FORMAT_TRY) 451 fmt = v4l2_subdev_get_try_format(&sensor->sd, sd_state, 0 452 /* pad */); 453 else 454 fmt = &sensor->fmt; 455 456 format->format = *fmt; 457 458 mutex_unlock(&sensor->lock); 459 return 0; 460 } 461 ar0521_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * format)462 static int ar0521_set_fmt(struct v4l2_subdev *sd, 463 struct v4l2_subdev_state *sd_state, 464 struct v4l2_subdev_format *format) 465 { 466 struct ar0521_dev *sensor = to_ar0521_dev(sd); 467 int max_vblank, max_hblank, exposure_max; 468 int ret; 469 470 ar0521_adj_fmt(&format->format); 471 472 mutex_lock(&sensor->lock); 473 474 if (format->which == V4L2_SUBDEV_FORMAT_TRY) { 475 struct v4l2_mbus_framefmt *fmt; 476 477 fmt = v4l2_subdev_get_try_format(sd, sd_state, 0 /* pad */); 478 *fmt = format->format; 479 480 mutex_unlock(&sensor->lock); 481 482 return 0; 483 } 484 485 sensor->fmt = format->format; 486 ar0521_calc_pll(sensor); 487 488 /* 489 * Update the exposure and blankings limits. Blankings are also reset 490 * to the minimum. 491 */ 492 max_hblank = AR0521_TOTAL_WIDTH_MAX - sensor->fmt.width; 493 ret = __v4l2_ctrl_modify_range(sensor->ctrls.hblank, 494 sensor->ctrls.hblank->minimum, 495 max_hblank, sensor->ctrls.hblank->step, 496 sensor->ctrls.hblank->minimum); 497 if (ret) 498 goto unlock; 499 500 ret = __v4l2_ctrl_s_ctrl(sensor->ctrls.hblank, 501 sensor->ctrls.hblank->minimum); 502 if (ret) 503 goto unlock; 504 505 max_vblank = AR0521_TOTAL_HEIGHT_MAX - sensor->fmt.height; 506 ret = __v4l2_ctrl_modify_range(sensor->ctrls.vblank, 507 sensor->ctrls.vblank->minimum, 508 max_vblank, sensor->ctrls.vblank->step, 509 sensor->ctrls.vblank->minimum); 510 if (ret) 511 goto unlock; 512 513 ret = __v4l2_ctrl_s_ctrl(sensor->ctrls.vblank, 514 sensor->ctrls.vblank->minimum); 515 if (ret) 516 goto unlock; 517 518 exposure_max = sensor->fmt.height + AR0521_HEIGHT_BLANKING_MIN - 4; 519 ret = __v4l2_ctrl_modify_range(sensor->ctrls.exposure, 520 sensor->ctrls.exposure->minimum, 521 exposure_max, 522 sensor->ctrls.exposure->step, 523 sensor->ctrls.exposure->default_value); 524 unlock: 525 mutex_unlock(&sensor->lock); 526 527 return ret; 528 } 529 ar0521_s_ctrl(struct v4l2_ctrl * ctrl)530 static int ar0521_s_ctrl(struct v4l2_ctrl *ctrl) 531 { 532 struct v4l2_subdev *sd = ctrl_to_sd(ctrl); 533 struct ar0521_dev *sensor = to_ar0521_dev(sd); 534 int exp_max; 535 int ret; 536 537 /* v4l2_ctrl_lock() locks our own mutex */ 538 539 switch (ctrl->id) { 540 case V4L2_CID_VBLANK: 541 exp_max = sensor->fmt.height + ctrl->val - 4; 542 __v4l2_ctrl_modify_range(sensor->ctrls.exposure, 543 sensor->ctrls.exposure->minimum, 544 exp_max, sensor->ctrls.exposure->step, 545 sensor->ctrls.exposure->default_value); 546 break; 547 } 548 549 /* access the sensor only if it's powered up */ 550 if (!pm_runtime_get_if_in_use(&sensor->i2c_client->dev)) 551 return 0; 552 553 switch (ctrl->id) { 554 case V4L2_CID_HBLANK: 555 case V4L2_CID_VBLANK: 556 ret = ar0521_set_geometry(sensor); 557 break; 558 case V4L2_CID_ANALOGUE_GAIN: 559 ret = ar0521_write_reg(sensor, AR0521_REG_ANA_GAIN_CODE_GLOBAL, 560 ctrl->val); 561 break; 562 case V4L2_CID_GAIN: 563 case V4L2_CID_RED_BALANCE: 564 case V4L2_CID_BLUE_BALANCE: 565 ret = ar0521_set_gains(sensor); 566 break; 567 case V4L2_CID_EXPOSURE: 568 ret = ar0521_write_reg(sensor, 569 AR0521_REG_COARSE_INTEGRATION_TIME, 570 ctrl->val); 571 break; 572 case V4L2_CID_TEST_PATTERN: 573 ret = ar0521_write_reg(sensor, AR0521_REG_TEST_PATTERN_MODE, 574 ctrl->val); 575 break; 576 default: 577 dev_err(&sensor->i2c_client->dev, 578 "Unsupported control %x\n", ctrl->id); 579 ret = -EINVAL; 580 break; 581 } 582 583 pm_runtime_put(&sensor->i2c_client->dev); 584 return ret; 585 } 586 587 static const struct v4l2_ctrl_ops ar0521_ctrl_ops = { 588 .s_ctrl = ar0521_s_ctrl, 589 }; 590 591 static const char * const test_pattern_menu[] = { 592 "Disabled", 593 "Solid color", 594 "Color bars", 595 "Faded color bars" 596 }; 597 ar0521_init_controls(struct ar0521_dev * sensor)598 static int ar0521_init_controls(struct ar0521_dev *sensor) 599 { 600 const struct v4l2_ctrl_ops *ops = &ar0521_ctrl_ops; 601 struct ar0521_ctrls *ctrls = &sensor->ctrls; 602 struct v4l2_ctrl_handler *hdl = &ctrls->handler; 603 int max_vblank, max_hblank, exposure_max; 604 struct v4l2_ctrl *link_freq; 605 int ret; 606 607 v4l2_ctrl_handler_init(hdl, 32); 608 609 /* We can use our own mutex for the ctrl lock */ 610 hdl->lock = &sensor->lock; 611 612 /* Analog gain */ 613 v4l2_ctrl_new_std(hdl, ops, V4L2_CID_ANALOGUE_GAIN, 614 AR0521_ANA_GAIN_MIN, AR0521_ANA_GAIN_MAX, 615 AR0521_ANA_GAIN_STEP, AR0521_ANA_GAIN_DEFAULT); 616 617 /* Manual gain */ 618 ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN, 0, 511, 1, 0); 619 ctrls->red_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_RED_BALANCE, 620 -512, 511, 1, 0); 621 ctrls->blue_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BLUE_BALANCE, 622 -512, 511, 1, 0); 623 v4l2_ctrl_cluster(3, &ctrls->gain); 624 625 /* Initialize blanking limits using the default 2592x1944 format. */ 626 max_hblank = AR0521_TOTAL_WIDTH_MAX - AR0521_WIDTH_MAX; 627 ctrls->hblank = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HBLANK, 628 AR0521_WIDTH_BLANKING_MIN, 629 max_hblank, 1, 630 AR0521_WIDTH_BLANKING_MIN); 631 632 max_vblank = AR0521_TOTAL_HEIGHT_MAX - AR0521_HEIGHT_MAX; 633 ctrls->vblank = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VBLANK, 634 AR0521_HEIGHT_BLANKING_MIN, 635 max_vblank, 2, 636 AR0521_HEIGHT_BLANKING_MIN); 637 v4l2_ctrl_cluster(2, &ctrls->hblank); 638 639 /* Read-only */ 640 ctrls->pixrate = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_PIXEL_RATE, 641 AR0521_PIXEL_CLOCK_MIN, 642 AR0521_PIXEL_CLOCK_MAX, 1, 643 AR0521_PIXEL_CLOCK_RATE); 644 645 /* Manual exposure time: max exposure time = visible + blank - 4 */ 646 exposure_max = AR0521_HEIGHT_MAX + AR0521_HEIGHT_BLANKING_MIN - 4; 647 ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE, 0, 648 exposure_max, 1, 0x70); 649 650 link_freq = v4l2_ctrl_new_int_menu(hdl, ops, V4L2_CID_LINK_FREQ, 651 ARRAY_SIZE(ar0521_link_frequencies) - 1, 652 0, ar0521_link_frequencies); 653 if (link_freq) 654 link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY; 655 656 ctrls->test_pattern = v4l2_ctrl_new_std_menu_items(hdl, ops, 657 V4L2_CID_TEST_PATTERN, 658 ARRAY_SIZE(test_pattern_menu) - 1, 659 0, 0, test_pattern_menu); 660 661 if (hdl->error) { 662 ret = hdl->error; 663 goto free_ctrls; 664 } 665 666 sensor->sd.ctrl_handler = hdl; 667 return 0; 668 669 free_ctrls: 670 v4l2_ctrl_handler_free(hdl); 671 return ret; 672 } 673 674 #define REGS_ENTRY(a) {(a), ARRAY_SIZE(a)} 675 #define REGS(...) REGS_ENTRY(((const __be16[]){__VA_ARGS__})) 676 677 static const struct initial_reg { 678 const __be16 *data; /* data[0] is register address */ 679 unsigned int count; 680 } initial_regs[] = { 681 REGS(be(0x0112), be(0x0808)), /* 8-bit/8-bit mode */ 682 683 /* PEDESTAL+2 :+2 is a workaround for 10bit mode +0.5 rounding */ 684 REGS(be(0x301E), be(0x00AA)), 685 686 /* corrections_recommended_bayer */ 687 REGS(be(0x3042), 688 be(0x0004), /* 3042: RNC: enable b/w rnc mode */ 689 be(0x4580)), /* 3044: RNC: enable row noise correction */ 690 691 REGS(be(0x30D2), 692 be(0x0000), /* 30D2: CRM/CC: enable crm on Visible and CC rows */ 693 be(0x0000), /* 30D4: CC: CC enabled with 16 samples per column */ 694 /* 30D6: CC: bw mode enabled/12 bit data resolution/bw mode */ 695 be(0x2FFF)), 696 697 REGS(be(0x30DA), 698 be(0x0FFF), /* 30DA: CC: column correction clip level 2 is 0 */ 699 be(0x0FFF), /* 30DC: CC: column correction clip level 3 is 0 */ 700 be(0x0000)), /* 30DE: CC: Group FPN correction */ 701 702 /* RNC: rnc scaling factor = * 54 / 64 (32 / 38 * 64 = 53.9) */ 703 REGS(be(0x30EE), be(0x1136)), 704 REGS(be(0x30FA), be(0xFD00)), /* GPIO0 = flash, GPIO1 = shutter */ 705 REGS(be(0x3120), be(0x0005)), /* p1 dither enabled for 10bit mode */ 706 REGS(be(0x3172), be(0x0206)), /* txlo clk divider options */ 707 /* FDOC:fdoc settings with fdoc every frame turned of */ 708 REGS(be(0x3180), be(0x9434)), 709 710 REGS(be(0x31B0), 711 be(0x008B), /* 31B0: frame_preamble - FIXME check WRT lanes# */ 712 be(0x0050)), /* 31B2: line_preamble - FIXME check WRT lanes# */ 713 714 /* don't use continuous clock mode while shut down */ 715 REGS(be(0x31BC), be(0x068C)), 716 REGS(be(0x31E0), be(0x0781)), /* Fuse/2DDC: enable 2ddc */ 717 718 /* analog_setup_recommended_10bit */ 719 REGS(be(0x341A), be(0x4735)), /* Samp&Hold pulse in ADC */ 720 REGS(be(0x3420), be(0x4735)), /* Samp&Hold pulse in ADC */ 721 REGS(be(0x3426), be(0x8A1A)), /* ADC offset distribution pulse */ 722 REGS(be(0x342A), be(0x0018)), /* pulse_config */ 723 724 /* pixel_timing_recommended */ 725 REGS(be(0x3D00), 726 /* 3D00 */ be(0x043E), be(0x4760), be(0xFFFF), be(0xFFFF), 727 /* 3D08 */ be(0x8000), be(0x0510), be(0xAF08), be(0x0252), 728 /* 3D10 */ be(0x486F), be(0x5D5D), be(0x8056), be(0x8313), 729 /* 3D18 */ be(0x0087), be(0x6A48), be(0x6982), be(0x0280), 730 /* 3D20 */ be(0x8359), be(0x8D02), be(0x8020), be(0x4882), 731 /* 3D28 */ be(0x4269), be(0x6A95), be(0x5988), be(0x5A83), 732 /* 3D30 */ be(0x5885), be(0x6280), be(0x6289), be(0x6097), 733 /* 3D38 */ be(0x5782), be(0x605C), be(0xBF18), be(0x0961), 734 /* 3D40 */ be(0x5080), be(0x2090), be(0x4390), be(0x4382), 735 /* 3D48 */ be(0x5F8A), be(0x5D5D), be(0x9C63), be(0x8063), 736 /* 3D50 */ be(0xA960), be(0x9757), be(0x8260), be(0x5CFF), 737 /* 3D58 */ be(0xBF10), be(0x1681), be(0x0802), be(0x8000), 738 /* 3D60 */ be(0x141C), be(0x6000), be(0x6022), be(0x4D80), 739 /* 3D68 */ be(0x5C97), be(0x6A69), be(0xAC6F), be(0x4645), 740 /* 3D70 */ be(0x4400), be(0x0513), be(0x8069), be(0x6AC6), 741 /* 3D78 */ be(0x5F95), be(0x5F70), be(0x8040), be(0x4A81), 742 /* 3D80 */ be(0x0300), be(0xE703), be(0x0088), be(0x4A83), 743 /* 3D88 */ be(0x40FF), be(0xFFFF), be(0xFD70), be(0x8040), 744 /* 3D90 */ be(0x4A85), be(0x4FA8), be(0x4F8C), be(0x0070), 745 /* 3D98 */ be(0xBE47), be(0x8847), be(0xBC78), be(0x6B89), 746 /* 3DA0 */ be(0x6A80), be(0x6986), be(0x6B8E), be(0x6B80), 747 /* 3DA8 */ be(0x6980), be(0x6A88), be(0x7C9F), be(0x866B), 748 /* 3DB0 */ be(0x8765), be(0x46FF), be(0xE365), be(0xA679), 749 /* 3DB8 */ be(0x4A40), be(0x4580), be(0x44BC), be(0x7000), 750 /* 3DC0 */ be(0x8040), be(0x0802), be(0x10EF), be(0x0104), 751 /* 3DC8 */ be(0x3860), be(0x5D5D), be(0x5682), be(0x1300), 752 /* 3DD0 */ be(0x8648), be(0x8202), be(0x8082), be(0x598A), 753 /* 3DD8 */ be(0x0280), be(0x2048), be(0x3060), be(0x8042), 754 /* 3DE0 */ be(0x9259), be(0x865A), be(0x8258), be(0x8562), 755 /* 3DE8 */ be(0x8062), be(0x8560), be(0x9257), be(0x8221), 756 /* 3DF0 */ be(0x10FF), be(0xB757), be(0x9361), be(0x1019), 757 /* 3DF8 */ be(0x8020), be(0x9043), be(0x8E43), be(0x845F), 758 /* 3E00 */ be(0x835D), be(0x805D), be(0x8163), be(0x8063), 759 /* 3E08 */ be(0xA060), be(0x9157), be(0x8260), be(0x5CFF), 760 /* 3E10 */ be(0xFFFF), be(0xFFE5), be(0x1016), be(0x2048), 761 /* 3E18 */ be(0x0802), be(0x1C60), be(0x0014), be(0x0060), 762 /* 3E20 */ be(0x2205), be(0x8120), be(0x908F), be(0x6A80), 763 /* 3E28 */ be(0x6982), be(0x5F9F), be(0x6F46), be(0x4544), 764 /* 3E30 */ be(0x0005), be(0x8013), be(0x8069), be(0x6A80), 765 /* 3E38 */ be(0x7000), be(0x0000), be(0x0000), be(0x0000), 766 /* 3E40 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 767 /* 3E48 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 768 /* 3E50 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 769 /* 3E58 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 770 /* 3E60 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 771 /* 3E68 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 772 /* 3E70 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 773 /* 3E78 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 774 /* 3E80 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 775 /* 3E88 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 776 /* 3E90 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 777 /* 3E98 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 778 /* 3EA0 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 779 /* 3EA8 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 780 /* 3EB0 */ be(0x0000), be(0x0000), be(0x0000)), 781 782 REGS(be(0x3EB6), be(0x004C)), /* ECL */ 783 784 REGS(be(0x3EBA), 785 be(0xAAAD), /* 3EBA */ 786 be(0x0086)), /* 3EBC: Bias currents for FSC/ECL */ 787 788 REGS(be(0x3EC0), 789 be(0x1E00), /* 3EC0: SFbin/SH mode settings */ 790 be(0x100A), /* 3EC2: CLK divider for ramp for 10 bit 400MH */ 791 /* 3EC4: FSC clamps for HDR mode and adc comp power down co */ 792 be(0x3300), 793 be(0xEA44), /* 3EC6: VLN and clk gating controls */ 794 be(0x6F6F), /* 3EC8: Txl0 and Txlo1 settings for normal mode */ 795 be(0x2F4A), /* 3ECA: CDAC/Txlo2/RSTGHI/RSTGLO settings */ 796 be(0x0506), /* 3ECC: RSTDHI/RSTDLO/CDAC/TXHI settings */ 797 /* 3ECE: Ramp buffer settings and Booster enable (bits 0-5) */ 798 be(0x203B), 799 be(0x13F0), /* 3ED0: TXLO from atest/sf bin settings */ 800 be(0xA53D), /* 3ED2: Ramp offset */ 801 be(0x862F), /* 3ED4: TXLO open loop/row driver settings */ 802 be(0x4081), /* 3ED6: Txlatch fr cfpn rows/vln bias */ 803 be(0x8003), /* 3ED8: Ramp step setting for 10 bit 400 Mhz */ 804 be(0xA580), /* 3EDA: Ramp Offset */ 805 be(0xC000), /* 3EDC: over range for rst and under range for sig */ 806 be(0xC103)), /* 3EDE: over range for sig and col dec clk settings */ 807 808 /* corrections_recommended_bayer */ 809 REGS(be(0x3F00), 810 be(0x0017), /* 3F00: BM_T0 */ 811 be(0x02DD), /* 3F02: BM_T1 */ 812 /* 3F04: if Ana_gain less than 2, use noise_floor0, multipl */ 813 be(0x0020), 814 /* 3F06: if Ana_gain between 4 and 7, use noise_floor2 and */ 815 be(0x0040), 816 /* 3F08: if Ana_gain between 4 and 7, use noise_floor2 and */ 817 be(0x0070), 818 /* 3F0A: Define noise_floor0(low address) and noise_floor1 */ 819 be(0x0101), 820 be(0x0302)), /* 3F0C: Define noise_floor2 and noise_floor3 */ 821 822 REGS(be(0x3F10), 823 be(0x0505), /* 3F10: single k factor 0 */ 824 be(0x0505), /* 3F12: single k factor 1 */ 825 be(0x0505), /* 3F14: single k factor 2 */ 826 be(0x01FF), /* 3F16: cross factor 0 */ 827 be(0x01FF), /* 3F18: cross factor 1 */ 828 be(0x01FF), /* 3F1A: cross factor 2 */ 829 be(0x0022)), /* 3F1E */ 830 831 /* GTH_THRES_RTN: 4max,4min filtered out of every 46 samples and */ 832 REGS(be(0x3F2C), be(0x442E)), 833 834 REGS(be(0x3F3E), 835 be(0x0000), /* 3F3E: Switch ADC from 12 bit to 10 bit mode */ 836 be(0x1511), /* 3F40: couple k factor 0 */ 837 be(0x1511), /* 3F42: couple k factor 1 */ 838 be(0x0707)), /* 3F44: couple k factor 2 */ 839 }; 840 ar0521_power_off(struct device * dev)841 static int ar0521_power_off(struct device *dev) 842 { 843 struct v4l2_subdev *sd = dev_get_drvdata(dev); 844 struct ar0521_dev *sensor = to_ar0521_dev(sd); 845 int i; 846 847 clk_disable_unprepare(sensor->extclk); 848 849 if (sensor->reset_gpio) 850 /* assert RESET signal */ 851 gpiod_set_value_cansleep(sensor->reset_gpio, 1); 852 853 for (i = ARRAY_SIZE(ar0521_supply_names) - 1; i >= 0; i--) { 854 if (sensor->supplies[i]) 855 regulator_disable(sensor->supplies[i]); 856 } 857 return 0; 858 } 859 ar0521_power_on(struct device * dev)860 static int ar0521_power_on(struct device *dev) 861 { 862 struct v4l2_subdev *sd = dev_get_drvdata(dev); 863 struct ar0521_dev *sensor = to_ar0521_dev(sd); 864 unsigned int cnt; 865 int ret; 866 867 for (cnt = 0; cnt < ARRAY_SIZE(ar0521_supply_names); cnt++) 868 if (sensor->supplies[cnt]) { 869 ret = regulator_enable(sensor->supplies[cnt]); 870 if (ret < 0) 871 goto off; 872 873 usleep_range(1000, 1500); /* min 1 ms */ 874 } 875 876 ret = clk_prepare_enable(sensor->extclk); 877 if (ret < 0) { 878 v4l2_err(&sensor->sd, "error enabling sensor clock\n"); 879 goto off; 880 } 881 usleep_range(1000, 1500); /* min 1 ms */ 882 883 if (sensor->reset_gpio) 884 /* deassert RESET signal */ 885 gpiod_set_value_cansleep(sensor->reset_gpio, 0); 886 usleep_range(4500, 5000); /* min 45000 clocks */ 887 888 for (cnt = 0; cnt < ARRAY_SIZE(initial_regs); cnt++) { 889 ret = ar0521_write_regs(sensor, initial_regs[cnt].data, 890 initial_regs[cnt].count); 891 if (ret) 892 goto off; 893 } 894 895 ret = ar0521_write_reg(sensor, AR0521_REG_SERIAL_FORMAT, 896 AR0521_REG_SERIAL_FORMAT_MIPI | 897 sensor->lane_count); 898 if (ret) 899 goto off; 900 901 /* set MIPI test mode - disabled for now */ 902 ret = ar0521_write_reg(sensor, AR0521_REG_HISPI_TEST_MODE, 903 ((0x40 << sensor->lane_count) - 0x40) | 904 AR0521_REG_HISPI_TEST_MODE_LP11); 905 if (ret) 906 goto off; 907 908 ret = ar0521_write_reg(sensor, AR0521_REG_ROW_SPEED, 0x110 | 909 4 / sensor->lane_count); 910 if (ret) 911 goto off; 912 913 return 0; 914 off: 915 ar0521_power_off(dev); 916 return ret; 917 } 918 ar0521_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)919 static int ar0521_enum_mbus_code(struct v4l2_subdev *sd, 920 struct v4l2_subdev_state *sd_state, 921 struct v4l2_subdev_mbus_code_enum *code) 922 { 923 struct ar0521_dev *sensor = to_ar0521_dev(sd); 924 925 if (code->index) 926 return -EINVAL; 927 928 code->code = sensor->fmt.code; 929 return 0; 930 } 931 ar0521_enum_frame_size(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_frame_size_enum * fse)932 static int ar0521_enum_frame_size(struct v4l2_subdev *sd, 933 struct v4l2_subdev_state *sd_state, 934 struct v4l2_subdev_frame_size_enum *fse) 935 { 936 if (fse->index) 937 return -EINVAL; 938 939 if (fse->code != MEDIA_BUS_FMT_SGRBG8_1X8) 940 return -EINVAL; 941 942 fse->min_width = AR0521_WIDTH_MIN; 943 fse->max_width = AR0521_WIDTH_MAX; 944 fse->min_height = AR0521_HEIGHT_MIN; 945 fse->max_height = AR0521_HEIGHT_MAX; 946 947 return 0; 948 } 949 ar0521_pre_streamon(struct v4l2_subdev * sd,u32 flags)950 static int ar0521_pre_streamon(struct v4l2_subdev *sd, u32 flags) 951 { 952 struct ar0521_dev *sensor = to_ar0521_dev(sd); 953 int ret; 954 955 if (!(flags & V4L2_SUBDEV_PRE_STREAMON_FL_MANUAL_LP)) 956 return -EACCES; 957 958 ret = pm_runtime_resume_and_get(&sensor->i2c_client->dev); 959 if (ret < 0) 960 return ret; 961 962 /* Set LP-11 on clock and data lanes */ 963 ret = ar0521_write_reg(sensor, AR0521_REG_HISPI_CONTROL_STATUS, 964 AR0521_REG_HISPI_CONTROL_STATUS_FRAMER_TEST_MODE_ENABLE); 965 if (ret) 966 goto err; 967 968 /* Start streaming LP-11 */ 969 ret = ar0521_write_reg(sensor, AR0521_REG_RESET, 970 AR0521_REG_RESET_DEFAULTS | 971 AR0521_REG_RESET_STREAM); 972 if (ret) 973 goto err; 974 return 0; 975 976 err: 977 pm_runtime_put(&sensor->i2c_client->dev); 978 return ret; 979 } 980 ar0521_post_streamoff(struct v4l2_subdev * sd)981 static int ar0521_post_streamoff(struct v4l2_subdev *sd) 982 { 983 struct ar0521_dev *sensor = to_ar0521_dev(sd); 984 985 pm_runtime_put(&sensor->i2c_client->dev); 986 return 0; 987 } 988 ar0521_s_stream(struct v4l2_subdev * sd,int enable)989 static int ar0521_s_stream(struct v4l2_subdev *sd, int enable) 990 { 991 struct ar0521_dev *sensor = to_ar0521_dev(sd); 992 int ret; 993 994 mutex_lock(&sensor->lock); 995 996 ret = ar0521_set_stream(sensor, enable); 997 if (!ret) 998 sensor->streaming = enable; 999 1000 mutex_unlock(&sensor->lock); 1001 return ret; 1002 } 1003 1004 static const struct v4l2_subdev_core_ops ar0521_core_ops = { 1005 .log_status = v4l2_ctrl_subdev_log_status, 1006 }; 1007 1008 static const struct v4l2_subdev_video_ops ar0521_video_ops = { 1009 .s_stream = ar0521_s_stream, 1010 .pre_streamon = ar0521_pre_streamon, 1011 .post_streamoff = ar0521_post_streamoff, 1012 }; 1013 1014 static const struct v4l2_subdev_pad_ops ar0521_pad_ops = { 1015 .enum_mbus_code = ar0521_enum_mbus_code, 1016 .enum_frame_size = ar0521_enum_frame_size, 1017 .get_fmt = ar0521_get_fmt, 1018 .set_fmt = ar0521_set_fmt, 1019 }; 1020 1021 static const struct v4l2_subdev_ops ar0521_subdev_ops = { 1022 .core = &ar0521_core_ops, 1023 .video = &ar0521_video_ops, 1024 .pad = &ar0521_pad_ops, 1025 }; 1026 ar0521_suspend(struct device * dev)1027 static int __maybe_unused ar0521_suspend(struct device *dev) 1028 { 1029 struct v4l2_subdev *sd = dev_get_drvdata(dev); 1030 struct ar0521_dev *sensor = to_ar0521_dev(sd); 1031 1032 if (sensor->streaming) 1033 ar0521_set_stream(sensor, 0); 1034 1035 return 0; 1036 } 1037 ar0521_resume(struct device * dev)1038 static int __maybe_unused ar0521_resume(struct device *dev) 1039 { 1040 struct v4l2_subdev *sd = dev_get_drvdata(dev); 1041 struct ar0521_dev *sensor = to_ar0521_dev(sd); 1042 1043 if (sensor->streaming) 1044 return ar0521_set_stream(sensor, 1); 1045 1046 return 0; 1047 } 1048 ar0521_probe(struct i2c_client * client)1049 static int ar0521_probe(struct i2c_client *client) 1050 { 1051 struct v4l2_fwnode_endpoint ep = { 1052 .bus_type = V4L2_MBUS_CSI2_DPHY 1053 }; 1054 struct device *dev = &client->dev; 1055 struct fwnode_handle *endpoint; 1056 struct ar0521_dev *sensor; 1057 unsigned int cnt; 1058 int ret; 1059 1060 sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL); 1061 if (!sensor) 1062 return -ENOMEM; 1063 1064 sensor->i2c_client = client; 1065 sensor->fmt.width = AR0521_WIDTH_MAX; 1066 sensor->fmt.height = AR0521_HEIGHT_MAX; 1067 1068 endpoint = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), 0, 0, 1069 FWNODE_GRAPH_ENDPOINT_NEXT); 1070 if (!endpoint) { 1071 dev_err(dev, "endpoint node not found\n"); 1072 return -EINVAL; 1073 } 1074 1075 ret = v4l2_fwnode_endpoint_parse(endpoint, &ep); 1076 fwnode_handle_put(endpoint); 1077 if (ret) { 1078 dev_err(dev, "could not parse endpoint\n"); 1079 return ret; 1080 } 1081 1082 if (ep.bus_type != V4L2_MBUS_CSI2_DPHY) { 1083 dev_err(dev, "invalid bus type, must be MIPI CSI2\n"); 1084 return -EINVAL; 1085 } 1086 1087 sensor->lane_count = ep.bus.mipi_csi2.num_data_lanes; 1088 switch (sensor->lane_count) { 1089 case 1: 1090 case 2: 1091 case 4: 1092 break; 1093 default: 1094 dev_err(dev, "invalid number of MIPI data lanes\n"); 1095 return -EINVAL; 1096 } 1097 1098 /* Get master clock (extclk) */ 1099 sensor->extclk = devm_clk_get(dev, "extclk"); 1100 if (IS_ERR(sensor->extclk)) { 1101 dev_err(dev, "failed to get extclk\n"); 1102 return PTR_ERR(sensor->extclk); 1103 } 1104 1105 sensor->extclk_freq = clk_get_rate(sensor->extclk); 1106 1107 if (sensor->extclk_freq < AR0521_EXTCLK_MIN || 1108 sensor->extclk_freq > AR0521_EXTCLK_MAX) { 1109 dev_err(dev, "extclk frequency out of range: %u Hz\n", 1110 sensor->extclk_freq); 1111 return -EINVAL; 1112 } 1113 1114 /* Request optional reset pin (usually active low) and assert it */ 1115 sensor->reset_gpio = devm_gpiod_get_optional(dev, "reset", 1116 GPIOD_OUT_HIGH); 1117 1118 v4l2_i2c_subdev_init(&sensor->sd, client, &ar0521_subdev_ops); 1119 1120 sensor->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE; 1121 sensor->pad.flags = MEDIA_PAD_FL_SOURCE; 1122 sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; 1123 ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad); 1124 if (ret) 1125 return ret; 1126 1127 for (cnt = 0; cnt < ARRAY_SIZE(ar0521_supply_names); cnt++) { 1128 struct regulator *supply = devm_regulator_get(dev, 1129 ar0521_supply_names[cnt]); 1130 1131 if (IS_ERR(supply)) { 1132 dev_info(dev, "no %s regulator found: %li\n", 1133 ar0521_supply_names[cnt], PTR_ERR(supply)); 1134 return PTR_ERR(supply); 1135 } 1136 sensor->supplies[cnt] = supply; 1137 } 1138 1139 mutex_init(&sensor->lock); 1140 1141 ret = ar0521_init_controls(sensor); 1142 if (ret) 1143 goto entity_cleanup; 1144 1145 ar0521_adj_fmt(&sensor->fmt); 1146 1147 ret = v4l2_async_register_subdev(&sensor->sd); 1148 if (ret) 1149 goto free_ctrls; 1150 1151 /* Turn on the device and enable runtime PM */ 1152 ret = ar0521_power_on(&client->dev); 1153 if (ret) 1154 goto disable; 1155 pm_runtime_set_active(&client->dev); 1156 pm_runtime_enable(&client->dev); 1157 pm_runtime_idle(&client->dev); 1158 return 0; 1159 1160 disable: 1161 v4l2_async_unregister_subdev(&sensor->sd); 1162 media_entity_cleanup(&sensor->sd.entity); 1163 free_ctrls: 1164 v4l2_ctrl_handler_free(&sensor->ctrls.handler); 1165 entity_cleanup: 1166 media_entity_cleanup(&sensor->sd.entity); 1167 mutex_destroy(&sensor->lock); 1168 return ret; 1169 } 1170 ar0521_remove(struct i2c_client * client)1171 static void ar0521_remove(struct i2c_client *client) 1172 { 1173 struct v4l2_subdev *sd = i2c_get_clientdata(client); 1174 struct ar0521_dev *sensor = to_ar0521_dev(sd); 1175 1176 v4l2_async_unregister_subdev(&sensor->sd); 1177 media_entity_cleanup(&sensor->sd.entity); 1178 v4l2_ctrl_handler_free(&sensor->ctrls.handler); 1179 pm_runtime_disable(&client->dev); 1180 if (!pm_runtime_status_suspended(&client->dev)) 1181 ar0521_power_off(&client->dev); 1182 pm_runtime_set_suspended(&client->dev); 1183 mutex_destroy(&sensor->lock); 1184 } 1185 1186 static const struct dev_pm_ops ar0521_pm_ops = { 1187 SET_SYSTEM_SLEEP_PM_OPS(ar0521_suspend, ar0521_resume) 1188 SET_RUNTIME_PM_OPS(ar0521_power_off, ar0521_power_on, NULL) 1189 }; 1190 static const struct of_device_id ar0521_dt_ids[] = { 1191 {.compatible = "onnn,ar0521"}, 1192 {} 1193 }; 1194 MODULE_DEVICE_TABLE(of, ar0521_dt_ids); 1195 1196 static struct i2c_driver ar0521_i2c_driver = { 1197 .driver = { 1198 .name = "ar0521", 1199 .pm = &ar0521_pm_ops, 1200 .of_match_table = ar0521_dt_ids, 1201 }, 1202 .probe = ar0521_probe, 1203 .remove = ar0521_remove, 1204 }; 1205 1206 module_i2c_driver(ar0521_i2c_driver); 1207 1208 MODULE_DESCRIPTION("AR0521 MIPI Camera subdev driver"); 1209 MODULE_AUTHOR("Krzysztof Hałasa <khalasa@piap.pl>"); 1210 MODULE_LICENSE("GPL"); 1211