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 clocks, the registers may be DDR */ 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_WIDTH_MIN 8u 30 #define AR0521_WIDTH_MAX 2608u 31 #define AR0521_HEIGHT_MIN 8u 32 #define AR0521_HEIGHT_MAX 1958u 33 34 #define AR0521_WIDTH_BLANKING_MIN 572u 35 #define AR0521_HEIGHT_BLANKING_MIN 38u /* must be even */ 36 #define AR0521_TOTAL_WIDTH_MIN 2968u 37 38 /* AR0521 registers */ 39 #define AR0521_REG_VT_PIX_CLK_DIV 0x0300 40 #define AR0521_REG_FRAME_LENGTH_LINES 0x0340 41 42 #define AR0521_REG_CHIP_ID 0x3000 43 #define AR0521_REG_COARSE_INTEGRATION_TIME 0x3012 44 #define AR0521_REG_ROW_SPEED 0x3016 45 #define AR0521_REG_EXTRA_DELAY 0x3018 46 #define AR0521_REG_RESET 0x301A 47 #define AR0521_REG_RESET_DEFAULTS 0x0238 48 #define AR0521_REG_RESET_GROUP_PARAM_HOLD 0x8000 49 #define AR0521_REG_RESET_STREAM BIT(2) 50 #define AR0521_REG_RESET_RESTART BIT(1) 51 #define AR0521_REG_RESET_INIT BIT(0) 52 53 #define AR0521_REG_GREEN1_GAIN 0x3056 54 #define AR0521_REG_BLUE_GAIN 0x3058 55 #define AR0521_REG_RED_GAIN 0x305A 56 #define AR0521_REG_GREEN2_GAIN 0x305C 57 #define AR0521_REG_GLOBAL_GAIN 0x305E 58 59 #define AR0521_REG_HISPI_TEST_MODE 0x3066 60 #define AR0521_REG_HISPI_TEST_MODE_LP11 0x0004 61 62 #define AR0521_REG_TEST_PATTERN_MODE 0x3070 63 64 #define AR0521_REG_SERIAL_FORMAT 0x31AE 65 #define AR0521_REG_SERIAL_FORMAT_MIPI 0x0200 66 67 #define AR0521_REG_HISPI_CONTROL_STATUS 0x31C6 68 #define AR0521_REG_HISPI_CONTROL_STATUS_FRAMER_TEST_MODE_ENABLE 0x80 69 70 #define be cpu_to_be16 71 72 static const char * const ar0521_supply_names[] = { 73 "vdd_io", /* I/O (1.8V) supply */ 74 "vdd", /* Core, PLL and MIPI (1.2V) supply */ 75 "vaa", /* Analog (2.7V) supply */ 76 }; 77 78 struct ar0521_ctrls { 79 struct v4l2_ctrl_handler handler; 80 struct { 81 struct v4l2_ctrl *gain; 82 struct v4l2_ctrl *red_balance; 83 struct v4l2_ctrl *blue_balance; 84 }; 85 struct { 86 struct v4l2_ctrl *hblank; 87 struct v4l2_ctrl *vblank; 88 }; 89 struct v4l2_ctrl *pixrate; 90 struct v4l2_ctrl *exposure; 91 struct v4l2_ctrl *test_pattern; 92 }; 93 94 struct ar0521_dev { 95 struct i2c_client *i2c_client; 96 struct v4l2_subdev sd; 97 struct media_pad pad; 98 struct clk *extclk; 99 u32 extclk_freq; 100 101 struct regulator *supplies[ARRAY_SIZE(ar0521_supply_names)]; 102 struct gpio_desc *reset_gpio; 103 104 /* lock to protect all members below */ 105 struct mutex lock; 106 107 struct v4l2_mbus_framefmt fmt; 108 struct ar0521_ctrls ctrls; 109 unsigned int lane_count; 110 u16 total_width; 111 u16 total_height; 112 u16 pll_pre; 113 u16 pll_mult; 114 u16 pll_pre2; 115 u16 pll_mult2; 116 bool streaming; 117 }; 118 119 static inline struct ar0521_dev *to_ar0521_dev(struct v4l2_subdev *sd) 120 { 121 return container_of(sd, struct ar0521_dev, sd); 122 } 123 124 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl) 125 { 126 return &container_of(ctrl->handler, struct ar0521_dev, 127 ctrls.handler)->sd; 128 } 129 130 static u32 div64_round(u64 v, u32 d) 131 { 132 return div_u64(v + (d >> 1), d); 133 } 134 135 static u32 div64_round_up(u64 v, u32 d) 136 { 137 return div_u64(v + d - 1, d); 138 } 139 140 /* Data must be BE16, the first value is the register address */ 141 static int ar0521_write_regs(struct ar0521_dev *sensor, const __be16 *data, 142 unsigned int count) 143 { 144 struct i2c_client *client = sensor->i2c_client; 145 struct i2c_msg msg; 146 int ret; 147 148 msg.addr = client->addr; 149 msg.flags = client->flags; 150 msg.buf = (u8 *)data; 151 msg.len = count * sizeof(*data); 152 153 ret = i2c_transfer(client->adapter, &msg, 1); 154 155 if (ret < 0) { 156 v4l2_err(&sensor->sd, "%s: I2C write error\n", __func__); 157 return ret; 158 } 159 160 return 0; 161 } 162 163 static int ar0521_write_reg(struct ar0521_dev *sensor, u16 reg, u16 val) 164 { 165 __be16 buf[2] = {be(reg), be(val)}; 166 167 return ar0521_write_regs(sensor, buf, 2); 168 } 169 170 static int ar0521_set_geometry(struct ar0521_dev *sensor) 171 { 172 /* All dimensions are unsigned 12-bit integers */ 173 u16 x = (AR0521_WIDTH_MAX - sensor->fmt.width) / 2; 174 u16 y = ((AR0521_HEIGHT_MAX - sensor->fmt.height) / 2) & ~1; 175 __be16 regs[] = { 176 be(AR0521_REG_FRAME_LENGTH_LINES), 177 be(sensor->total_height), 178 be(sensor->total_width), 179 be(x), 180 be(y), 181 be(x + sensor->fmt.width - 1), 182 be(y + sensor->fmt.height - 1), 183 be(sensor->fmt.width), 184 be(sensor->fmt.height) 185 }; 186 187 return ar0521_write_regs(sensor, regs, ARRAY_SIZE(regs)); 188 } 189 190 static int ar0521_set_gains(struct ar0521_dev *sensor) 191 { 192 int green = sensor->ctrls.gain->val; 193 int red = max(green + sensor->ctrls.red_balance->val, 0); 194 int blue = max(green + sensor->ctrls.blue_balance->val, 0); 195 unsigned int gain = min(red, min(green, blue)); 196 unsigned int analog = min(gain, 64u); /* range is 0 - 127 */ 197 __be16 regs[5]; 198 199 red = min(red - analog + 64, 511u); 200 green = min(green - analog + 64, 511u); 201 blue = min(blue - analog + 64, 511u); 202 regs[0] = be(AR0521_REG_GREEN1_GAIN); 203 regs[1] = be(green << 7 | analog); 204 regs[2] = be(blue << 7 | analog); 205 regs[3] = be(red << 7 | analog); 206 regs[4] = be(green << 7 | analog); 207 208 return ar0521_write_regs(sensor, regs, ARRAY_SIZE(regs)); 209 } 210 211 static u32 calc_pll(struct ar0521_dev *sensor, int num, u32 freq, u16 *pre_ptr, 212 u16 *mult_ptr) 213 { 214 u16 pre = 1, mult = 1, new_pre; 215 u32 pll = AR0521_PLL_MAX + 1; 216 217 for (new_pre = 1; new_pre < 64; new_pre++) { 218 u32 new_pll; 219 u32 new_mult = div64_round_up((u64)freq * new_pre, 220 sensor->extclk_freq); 221 222 if (new_mult < 32) 223 continue; /* Minimum value */ 224 if (new_mult > 254) 225 break; /* Maximum, larger pre won't work either */ 226 if (sensor->extclk_freq * (u64)new_mult < AR0521_PLL_MIN * 227 new_pre) 228 continue; 229 if (sensor->extclk_freq * (u64)new_mult > AR0521_PLL_MAX * 230 new_pre) 231 break; /* Larger pre won't work either */ 232 new_pll = div64_round_up(sensor->extclk_freq * (u64)new_mult, 233 new_pre); 234 if (new_pll < pll) { 235 pll = new_pll; 236 pre = new_pre; 237 mult = new_mult; 238 } 239 } 240 241 pll = div64_round(sensor->extclk_freq * (u64)mult, pre); 242 *pre_ptr = pre; 243 *mult_ptr = mult; 244 return pll; 245 } 246 247 #define DIV 4 248 static void ar0521_calc_mode(struct ar0521_dev *sensor) 249 { 250 unsigned int speed_mod = 4 / sensor->lane_count; /* 1 with 4 DDR lanes */ 251 u16 total_width = max(sensor->fmt.width + AR0521_WIDTH_BLANKING_MIN, 252 AR0521_TOTAL_WIDTH_MIN); 253 u16 total_height = sensor->fmt.height + AR0521_HEIGHT_BLANKING_MIN; 254 255 /* Calculate approximate pixel clock first */ 256 u64 pix_clk = AR0521_PIXEL_CLOCK_RATE; 257 258 /* PLL1 drives pixel clock - dual rate */ 259 pix_clk = calc_pll(sensor, 1, pix_clk * (DIV / 2), &sensor->pll_pre, 260 &sensor->pll_mult); 261 pix_clk = div64_round(pix_clk, (DIV / 2)); 262 calc_pll(sensor, 2, pix_clk * (DIV / 2) * speed_mod, &sensor->pll_pre2, 263 &sensor->pll_mult2); 264 265 sensor->total_width = total_width; 266 sensor->total_height = total_height; 267 } 268 269 static int ar0521_write_mode(struct ar0521_dev *sensor) 270 { 271 __be16 pll_regs[] = { 272 be(AR0521_REG_VT_PIX_CLK_DIV), 273 /* 0x300 */ be(4), /* vt_pix_clk_div = number of bits / 2 */ 274 /* 0x302 */ be(1), /* vt_sys_clk_div */ 275 /* 0x304 */ be((sensor->pll_pre2 << 8) | sensor->pll_pre), 276 /* 0x306 */ be((sensor->pll_mult2 << 8) | sensor->pll_mult), 277 /* 0x308 */ be(8), /* op_pix_clk_div = 2 * vt_pix_clk_div */ 278 /* 0x30A */ be(1) /* op_sys_clk_div */ 279 }; 280 int ret; 281 282 /* Stop streaming for just a moment */ 283 ret = ar0521_write_reg(sensor, AR0521_REG_RESET, 284 AR0521_REG_RESET_DEFAULTS); 285 if (ret) 286 return ret; 287 288 ret = ar0521_set_geometry(sensor); 289 if (ret) 290 return ret; 291 292 ret = ar0521_write_regs(sensor, pll_regs, ARRAY_SIZE(pll_regs)); 293 if (ret) 294 return ret; 295 296 ret = ar0521_write_reg(sensor, AR0521_REG_COARSE_INTEGRATION_TIME, 297 sensor->ctrls.exposure->val); 298 if (ret) 299 return ret; 300 301 ret = ar0521_write_reg(sensor, AR0521_REG_RESET, 302 AR0521_REG_RESET_DEFAULTS | 303 AR0521_REG_RESET_STREAM); 304 if (ret) 305 return ret; 306 307 ret = ar0521_write_reg(sensor, AR0521_REG_TEST_PATTERN_MODE, 308 sensor->ctrls.test_pattern->val); 309 return ret; 310 } 311 312 static int ar0521_set_stream(struct ar0521_dev *sensor, bool on) 313 { 314 int ret; 315 316 if (on) { 317 ret = pm_runtime_resume_and_get(&sensor->i2c_client->dev); 318 if (ret < 0) 319 return ret; 320 321 ar0521_calc_mode(sensor); 322 ret = ar0521_write_mode(sensor); 323 if (ret) 324 goto err; 325 326 ret = ar0521_set_gains(sensor); 327 if (ret) 328 goto err; 329 330 /* Exit LP-11 mode on clock and data lanes */ 331 ret = ar0521_write_reg(sensor, AR0521_REG_HISPI_CONTROL_STATUS, 332 0); 333 if (ret) 334 goto err; 335 336 /* Start streaming */ 337 ret = ar0521_write_reg(sensor, AR0521_REG_RESET, 338 AR0521_REG_RESET_DEFAULTS | 339 AR0521_REG_RESET_STREAM); 340 if (ret) 341 goto err; 342 343 return 0; 344 345 err: 346 pm_runtime_put(&sensor->i2c_client->dev); 347 return ret; 348 349 } else { 350 /* 351 * Reset gain, the sensor may produce all white pixels without 352 * this 353 */ 354 ret = ar0521_write_reg(sensor, AR0521_REG_GLOBAL_GAIN, 0x2000); 355 if (ret) 356 return ret; 357 358 /* Stop streaming */ 359 ret = ar0521_write_reg(sensor, AR0521_REG_RESET, 360 AR0521_REG_RESET_DEFAULTS); 361 if (ret) 362 return ret; 363 364 pm_runtime_put(&sensor->i2c_client->dev); 365 return 0; 366 } 367 } 368 369 static void ar0521_adj_fmt(struct v4l2_mbus_framefmt *fmt) 370 { 371 fmt->width = clamp(ALIGN(fmt->width, 4), AR0521_WIDTH_MIN, 372 AR0521_WIDTH_MAX); 373 fmt->height = clamp(ALIGN(fmt->height, 4), AR0521_HEIGHT_MIN, 374 AR0521_HEIGHT_MAX); 375 fmt->code = MEDIA_BUS_FMT_SGRBG8_1X8; 376 fmt->field = V4L2_FIELD_NONE; 377 fmt->colorspace = V4L2_COLORSPACE_SRGB; 378 fmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT; 379 fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE; 380 fmt->xfer_func = V4L2_XFER_FUNC_DEFAULT; 381 } 382 383 static int ar0521_get_fmt(struct v4l2_subdev *sd, 384 struct v4l2_subdev_state *sd_state, 385 struct v4l2_subdev_format *format) 386 { 387 struct ar0521_dev *sensor = to_ar0521_dev(sd); 388 struct v4l2_mbus_framefmt *fmt; 389 390 mutex_lock(&sensor->lock); 391 392 if (format->which == V4L2_SUBDEV_FORMAT_TRY) 393 fmt = v4l2_subdev_get_try_format(&sensor->sd, sd_state, 0 394 /* pad */); 395 else 396 fmt = &sensor->fmt; 397 398 format->format = *fmt; 399 400 mutex_unlock(&sensor->lock); 401 return 0; 402 } 403 404 static int ar0521_set_fmt(struct v4l2_subdev *sd, 405 struct v4l2_subdev_state *sd_state, 406 struct v4l2_subdev_format *format) 407 { 408 struct ar0521_dev *sensor = to_ar0521_dev(sd); 409 410 ar0521_adj_fmt(&format->format); 411 412 mutex_lock(&sensor->lock); 413 414 if (format->which == V4L2_SUBDEV_FORMAT_TRY) { 415 struct v4l2_mbus_framefmt *fmt; 416 417 fmt = v4l2_subdev_get_try_format(sd, sd_state, 0 /* pad */); 418 *fmt = format->format; 419 } else { 420 sensor->fmt = format->format; 421 ar0521_calc_mode(sensor); 422 } 423 424 mutex_unlock(&sensor->lock); 425 return 0; 426 } 427 428 static int ar0521_s_ctrl(struct v4l2_ctrl *ctrl) 429 { 430 struct v4l2_subdev *sd = ctrl_to_sd(ctrl); 431 struct ar0521_dev *sensor = to_ar0521_dev(sd); 432 int ret; 433 434 /* v4l2_ctrl_lock() locks our own mutex */ 435 436 switch (ctrl->id) { 437 case V4L2_CID_HBLANK: 438 case V4L2_CID_VBLANK: 439 sensor->total_width = sensor->fmt.width + 440 sensor->ctrls.hblank->val; 441 sensor->total_height = sensor->fmt.width + 442 sensor->ctrls.vblank->val; 443 break; 444 default: 445 ret = -EINVAL; 446 break; 447 } 448 449 /* access the sensor only if it's powered up */ 450 if (!pm_runtime_get_if_in_use(&sensor->i2c_client->dev)) 451 return 0; 452 453 switch (ctrl->id) { 454 case V4L2_CID_HBLANK: 455 case V4L2_CID_VBLANK: 456 ret = ar0521_set_geometry(sensor); 457 break; 458 case V4L2_CID_GAIN: 459 case V4L2_CID_RED_BALANCE: 460 case V4L2_CID_BLUE_BALANCE: 461 ret = ar0521_set_gains(sensor); 462 break; 463 case V4L2_CID_EXPOSURE: 464 ret = ar0521_write_reg(sensor, 465 AR0521_REG_COARSE_INTEGRATION_TIME, 466 ctrl->val); 467 break; 468 case V4L2_CID_TEST_PATTERN: 469 ret = ar0521_write_reg(sensor, AR0521_REG_TEST_PATTERN_MODE, 470 ctrl->val); 471 break; 472 } 473 474 pm_runtime_put(&sensor->i2c_client->dev); 475 return ret; 476 } 477 478 static const struct v4l2_ctrl_ops ar0521_ctrl_ops = { 479 .s_ctrl = ar0521_s_ctrl, 480 }; 481 482 static const char * const test_pattern_menu[] = { 483 "Disabled", 484 "Solid color", 485 "Color bars", 486 "Faded color bars" 487 }; 488 489 static int ar0521_init_controls(struct ar0521_dev *sensor) 490 { 491 const struct v4l2_ctrl_ops *ops = &ar0521_ctrl_ops; 492 struct ar0521_ctrls *ctrls = &sensor->ctrls; 493 struct v4l2_ctrl_handler *hdl = &ctrls->handler; 494 int ret; 495 496 v4l2_ctrl_handler_init(hdl, 32); 497 498 /* We can use our own mutex for the ctrl lock */ 499 hdl->lock = &sensor->lock; 500 501 /* Manual gain */ 502 ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN, 0, 511, 1, 0); 503 ctrls->red_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_RED_BALANCE, 504 -512, 511, 1, 0); 505 ctrls->blue_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BLUE_BALANCE, 506 -512, 511, 1, 0); 507 v4l2_ctrl_cluster(3, &ctrls->gain); 508 509 ctrls->hblank = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HBLANK, 510 AR0521_WIDTH_BLANKING_MIN, 4094, 1, 511 AR0521_WIDTH_BLANKING_MIN); 512 ctrls->vblank = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VBLANK, 513 AR0521_HEIGHT_BLANKING_MIN, 4094, 2, 514 AR0521_HEIGHT_BLANKING_MIN); 515 v4l2_ctrl_cluster(2, &ctrls->hblank); 516 517 /* Read-only */ 518 ctrls->pixrate = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_PIXEL_RATE, 519 AR0521_PIXEL_CLOCK_MIN, 520 AR0521_PIXEL_CLOCK_MAX, 1, 521 AR0521_PIXEL_CLOCK_RATE); 522 523 /* Manual exposure time */ 524 ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE, 0, 525 65535, 1, 360); 526 527 ctrls->test_pattern = v4l2_ctrl_new_std_menu_items(hdl, ops, 528 V4L2_CID_TEST_PATTERN, 529 ARRAY_SIZE(test_pattern_menu) - 1, 530 0, 0, test_pattern_menu); 531 532 if (hdl->error) { 533 ret = hdl->error; 534 goto free_ctrls; 535 } 536 537 sensor->sd.ctrl_handler = hdl; 538 return 0; 539 540 free_ctrls: 541 v4l2_ctrl_handler_free(hdl); 542 return ret; 543 } 544 545 #define REGS_ENTRY(a) {(a), ARRAY_SIZE(a)} 546 #define REGS(...) REGS_ENTRY(((const __be16[]){__VA_ARGS__})) 547 548 static const struct initial_reg { 549 const __be16 *data; /* data[0] is register address */ 550 unsigned int count; 551 } initial_regs[] = { 552 REGS(be(0x0112), be(0x0808)), /* 8-bit/8-bit mode */ 553 554 /* PEDESTAL+2 :+2 is a workaround for 10bit mode +0.5 rounding */ 555 REGS(be(0x301E), be(0x00AA)), 556 557 /* corrections_recommended_bayer */ 558 REGS(be(0x3042), 559 be(0x0004), /* 3042: RNC: enable b/w rnc mode */ 560 be(0x4580)), /* 3044: RNC: enable row noise correction */ 561 562 REGS(be(0x30D2), 563 be(0x0000), /* 30D2: CRM/CC: enable crm on Visible and CC rows */ 564 be(0x0000), /* 30D4: CC: CC enabled with 16 samples per column */ 565 /* 30D6: CC: bw mode enabled/12 bit data resolution/bw mode */ 566 be(0x2FFF)), 567 568 REGS(be(0x30DA), 569 be(0x0FFF), /* 30DA: CC: column correction clip level 2 is 0 */ 570 be(0x0FFF), /* 30DC: CC: column correction clip level 3 is 0 */ 571 be(0x0000)), /* 30DE: CC: Group FPN correction */ 572 573 /* RNC: rnc scaling factor = * 54 / 64 (32 / 38 * 64 = 53.9) */ 574 REGS(be(0x30EE), be(0x1136)), 575 REGS(be(0x30FA), be(0xFD00)), /* GPIO0 = flash, GPIO1 = shutter */ 576 REGS(be(0x3120), be(0x0005)), /* p1 dither enabled for 10bit mode */ 577 REGS(be(0x3172), be(0x0206)), /* txlo clk divider options */ 578 /* FDOC:fdoc settings with fdoc every frame turned of */ 579 REGS(be(0x3180), be(0x9434)), 580 581 REGS(be(0x31B0), 582 be(0x008B), /* 31B0: frame_preamble - FIXME check WRT lanes# */ 583 be(0x0050)), /* 31B2: line_preamble - FIXME check WRT lanes# */ 584 585 /* don't use continuous clock mode while shut down */ 586 REGS(be(0x31BC), be(0x068C)), 587 REGS(be(0x31E0), be(0x0781)), /* Fuse/2DDC: enable 2ddc */ 588 589 /* analog_setup_recommended_10bit */ 590 REGS(be(0x341A), be(0x4735)), /* Samp&Hold pulse in ADC */ 591 REGS(be(0x3420), be(0x4735)), /* Samp&Hold pulse in ADC */ 592 REGS(be(0x3426), be(0x8A1A)), /* ADC offset distribution pulse */ 593 REGS(be(0x342A), be(0x0018)), /* pulse_config */ 594 595 /* pixel_timing_recommended */ 596 REGS(be(0x3D00), 597 /* 3D00 */ be(0x043E), be(0x4760), be(0xFFFF), be(0xFFFF), 598 /* 3D08 */ be(0x8000), be(0x0510), be(0xAF08), be(0x0252), 599 /* 3D10 */ be(0x486F), be(0x5D5D), be(0x8056), be(0x8313), 600 /* 3D18 */ be(0x0087), be(0x6A48), be(0x6982), be(0x0280), 601 /* 3D20 */ be(0x8359), be(0x8D02), be(0x8020), be(0x4882), 602 /* 3D28 */ be(0x4269), be(0x6A95), be(0x5988), be(0x5A83), 603 /* 3D30 */ be(0x5885), be(0x6280), be(0x6289), be(0x6097), 604 /* 3D38 */ be(0x5782), be(0x605C), be(0xBF18), be(0x0961), 605 /* 3D40 */ be(0x5080), be(0x2090), be(0x4390), be(0x4382), 606 /* 3D48 */ be(0x5F8A), be(0x5D5D), be(0x9C63), be(0x8063), 607 /* 3D50 */ be(0xA960), be(0x9757), be(0x8260), be(0x5CFF), 608 /* 3D58 */ be(0xBF10), be(0x1681), be(0x0802), be(0x8000), 609 /* 3D60 */ be(0x141C), be(0x6000), be(0x6022), be(0x4D80), 610 /* 3D68 */ be(0x5C97), be(0x6A69), be(0xAC6F), be(0x4645), 611 /* 3D70 */ be(0x4400), be(0x0513), be(0x8069), be(0x6AC6), 612 /* 3D78 */ be(0x5F95), be(0x5F70), be(0x8040), be(0x4A81), 613 /* 3D80 */ be(0x0300), be(0xE703), be(0x0088), be(0x4A83), 614 /* 3D88 */ be(0x40FF), be(0xFFFF), be(0xFD70), be(0x8040), 615 /* 3D90 */ be(0x4A85), be(0x4FA8), be(0x4F8C), be(0x0070), 616 /* 3D98 */ be(0xBE47), be(0x8847), be(0xBC78), be(0x6B89), 617 /* 3DA0 */ be(0x6A80), be(0x6986), be(0x6B8E), be(0x6B80), 618 /* 3DA8 */ be(0x6980), be(0x6A88), be(0x7C9F), be(0x866B), 619 /* 3DB0 */ be(0x8765), be(0x46FF), be(0xE365), be(0xA679), 620 /* 3DB8 */ be(0x4A40), be(0x4580), be(0x44BC), be(0x7000), 621 /* 3DC0 */ be(0x8040), be(0x0802), be(0x10EF), be(0x0104), 622 /* 3DC8 */ be(0x3860), be(0x5D5D), be(0x5682), be(0x1300), 623 /* 3DD0 */ be(0x8648), be(0x8202), be(0x8082), be(0x598A), 624 /* 3DD8 */ be(0x0280), be(0x2048), be(0x3060), be(0x8042), 625 /* 3DE0 */ be(0x9259), be(0x865A), be(0x8258), be(0x8562), 626 /* 3DE8 */ be(0x8062), be(0x8560), be(0x9257), be(0x8221), 627 /* 3DF0 */ be(0x10FF), be(0xB757), be(0x9361), be(0x1019), 628 /* 3DF8 */ be(0x8020), be(0x9043), be(0x8E43), be(0x845F), 629 /* 3E00 */ be(0x835D), be(0x805D), be(0x8163), be(0x8063), 630 /* 3E08 */ be(0xA060), be(0x9157), be(0x8260), be(0x5CFF), 631 /* 3E10 */ be(0xFFFF), be(0xFFE5), be(0x1016), be(0x2048), 632 /* 3E18 */ be(0x0802), be(0x1C60), be(0x0014), be(0x0060), 633 /* 3E20 */ be(0x2205), be(0x8120), be(0x908F), be(0x6A80), 634 /* 3E28 */ be(0x6982), be(0x5F9F), be(0x6F46), be(0x4544), 635 /* 3E30 */ be(0x0005), be(0x8013), be(0x8069), be(0x6A80), 636 /* 3E38 */ be(0x7000), be(0x0000), be(0x0000), be(0x0000), 637 /* 3E40 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 638 /* 3E48 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 639 /* 3E50 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 640 /* 3E58 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 641 /* 3E60 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 642 /* 3E68 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 643 /* 3E70 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 644 /* 3E78 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 645 /* 3E80 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 646 /* 3E88 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 647 /* 3E90 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 648 /* 3E98 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 649 /* 3EA0 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 650 /* 3EA8 */ be(0x0000), be(0x0000), be(0x0000), be(0x0000), 651 /* 3EB0 */ be(0x0000), be(0x0000), be(0x0000)), 652 653 REGS(be(0x3EB6), be(0x004C)), /* ECL */ 654 655 REGS(be(0x3EBA), 656 be(0xAAAD), /* 3EBA */ 657 be(0x0086)), /* 3EBC: Bias currents for FSC/ECL */ 658 659 REGS(be(0x3EC0), 660 be(0x1E00), /* 3EC0: SFbin/SH mode settings */ 661 be(0x100A), /* 3EC2: CLK divider for ramp for 10 bit 400MH */ 662 /* 3EC4: FSC clamps for HDR mode and adc comp power down co */ 663 be(0x3300), 664 be(0xEA44), /* 3EC6: VLN and clk gating controls */ 665 be(0x6F6F), /* 3EC8: Txl0 and Txlo1 settings for normal mode */ 666 be(0x2F4A), /* 3ECA: CDAC/Txlo2/RSTGHI/RSTGLO settings */ 667 be(0x0506), /* 3ECC: RSTDHI/RSTDLO/CDAC/TXHI settings */ 668 /* 3ECE: Ramp buffer settings and Booster enable (bits 0-5) */ 669 be(0x203B), 670 be(0x13F0), /* 3ED0: TXLO from atest/sf bin settings */ 671 be(0xA53D), /* 3ED2: Ramp offset */ 672 be(0x862F), /* 3ED4: TXLO open loop/row driver settings */ 673 be(0x4081), /* 3ED6: Txlatch fr cfpn rows/vln bias */ 674 be(0x8003), /* 3ED8: Ramp step setting for 10 bit 400 Mhz */ 675 be(0xA580), /* 3EDA: Ramp Offset */ 676 be(0xC000), /* 3EDC: over range for rst and under range for sig */ 677 be(0xC103)), /* 3EDE: over range for sig and col dec clk settings */ 678 679 /* corrections_recommended_bayer */ 680 REGS(be(0x3F00), 681 be(0x0017), /* 3F00: BM_T0 */ 682 be(0x02DD), /* 3F02: BM_T1 */ 683 /* 3F04: if Ana_gain less than 2, use noise_floor0, multipl */ 684 be(0x0020), 685 /* 3F06: if Ana_gain between 4 and 7, use noise_floor2 and */ 686 be(0x0040), 687 /* 3F08: if Ana_gain between 4 and 7, use noise_floor2 and */ 688 be(0x0070), 689 /* 3F0A: Define noise_floor0(low address) and noise_floor1 */ 690 be(0x0101), 691 be(0x0302)), /* 3F0C: Define noise_floor2 and noise_floor3 */ 692 693 REGS(be(0x3F10), 694 be(0x0505), /* 3F10: single k factor 0 */ 695 be(0x0505), /* 3F12: single k factor 1 */ 696 be(0x0505), /* 3F14: single k factor 2 */ 697 be(0x01FF), /* 3F16: cross factor 0 */ 698 be(0x01FF), /* 3F18: cross factor 1 */ 699 be(0x01FF), /* 3F1A: cross factor 2 */ 700 be(0x0022)), /* 3F1E */ 701 702 /* GTH_THRES_RTN: 4max,4min filtered out of every 46 samples and */ 703 REGS(be(0x3F2C), be(0x442E)), 704 705 REGS(be(0x3F3E), 706 be(0x0000), /* 3F3E: Switch ADC from 12 bit to 10 bit mode */ 707 be(0x1511), /* 3F40: couple k factor 0 */ 708 be(0x1511), /* 3F42: couple k factor 1 */ 709 be(0x0707)), /* 3F44: couple k factor 2 */ 710 }; 711 712 static int ar0521_power_off(struct device *dev) 713 { 714 struct v4l2_subdev *sd = dev_get_drvdata(dev); 715 struct ar0521_dev *sensor = to_ar0521_dev(sd); 716 int i; 717 718 clk_disable_unprepare(sensor->extclk); 719 720 if (sensor->reset_gpio) 721 gpiod_set_value(sensor->reset_gpio, 1); /* assert RESET signal */ 722 723 for (i = ARRAY_SIZE(ar0521_supply_names) - 1; i >= 0; i--) { 724 if (sensor->supplies[i]) 725 regulator_disable(sensor->supplies[i]); 726 } 727 return 0; 728 } 729 730 static int ar0521_power_on(struct device *dev) 731 { 732 struct v4l2_subdev *sd = dev_get_drvdata(dev); 733 struct ar0521_dev *sensor = to_ar0521_dev(sd); 734 unsigned int cnt; 735 int ret; 736 737 for (cnt = 0; cnt < ARRAY_SIZE(ar0521_supply_names); cnt++) 738 if (sensor->supplies[cnt]) { 739 ret = regulator_enable(sensor->supplies[cnt]); 740 if (ret < 0) 741 goto off; 742 743 usleep_range(1000, 1500); /* min 1 ms */ 744 } 745 746 ret = clk_prepare_enable(sensor->extclk); 747 if (ret < 0) { 748 v4l2_err(&sensor->sd, "error enabling sensor clock\n"); 749 goto off; 750 } 751 usleep_range(1000, 1500); /* min 1 ms */ 752 753 if (sensor->reset_gpio) 754 /* deassert RESET signal */ 755 gpiod_set_value(sensor->reset_gpio, 0); 756 usleep_range(4500, 5000); /* min 45000 clocks */ 757 758 for (cnt = 0; cnt < ARRAY_SIZE(initial_regs); cnt++) { 759 ret = ar0521_write_regs(sensor, initial_regs[cnt].data, 760 initial_regs[cnt].count); 761 if (ret) 762 goto off; 763 } 764 765 ret = ar0521_write_reg(sensor, AR0521_REG_SERIAL_FORMAT, 766 AR0521_REG_SERIAL_FORMAT_MIPI | 767 sensor->lane_count); 768 if (ret) 769 goto off; 770 771 /* set MIPI test mode - disabled for now */ 772 ret = ar0521_write_reg(sensor, AR0521_REG_HISPI_TEST_MODE, 773 ((0x40 << sensor->lane_count) - 0x40) | 774 AR0521_REG_HISPI_TEST_MODE_LP11); 775 if (ret) 776 goto off; 777 778 ret = ar0521_write_reg(sensor, AR0521_REG_ROW_SPEED, 0x110 | 779 4 / sensor->lane_count); 780 if (ret) 781 goto off; 782 783 return 0; 784 off: 785 ar0521_power_off(dev); 786 return ret; 787 } 788 789 static int ar0521_enum_mbus_code(struct v4l2_subdev *sd, 790 struct v4l2_subdev_state *sd_state, 791 struct v4l2_subdev_mbus_code_enum *code) 792 { 793 struct ar0521_dev *sensor = to_ar0521_dev(sd); 794 795 if (code->index) 796 return -EINVAL; 797 798 code->code = sensor->fmt.code; 799 return 0; 800 } 801 802 static int ar0521_pre_streamon(struct v4l2_subdev *sd, u32 flags) 803 { 804 struct ar0521_dev *sensor = to_ar0521_dev(sd); 805 int ret; 806 807 if (!(flags & V4L2_SUBDEV_PRE_STREAMON_FL_MANUAL_LP)) 808 return -EACCES; 809 810 ret = pm_runtime_resume_and_get(&sensor->i2c_client->dev); 811 if (ret < 0) 812 return ret; 813 814 /* Set LP-11 on clock and data lanes */ 815 ret = ar0521_write_reg(sensor, AR0521_REG_HISPI_CONTROL_STATUS, 816 AR0521_REG_HISPI_CONTROL_STATUS_FRAMER_TEST_MODE_ENABLE); 817 if (ret) 818 goto err; 819 820 /* Start streaming LP-11 */ 821 ret = ar0521_write_reg(sensor, AR0521_REG_RESET, 822 AR0521_REG_RESET_DEFAULTS | 823 AR0521_REG_RESET_STREAM); 824 if (ret) 825 goto err; 826 return 0; 827 828 err: 829 pm_runtime_put(&sensor->i2c_client->dev); 830 return ret; 831 } 832 833 static int ar0521_post_streamoff(struct v4l2_subdev *sd) 834 { 835 struct ar0521_dev *sensor = to_ar0521_dev(sd); 836 837 pm_runtime_put(&sensor->i2c_client->dev); 838 return 0; 839 } 840 841 static int ar0521_s_stream(struct v4l2_subdev *sd, int enable) 842 { 843 struct ar0521_dev *sensor = to_ar0521_dev(sd); 844 int ret; 845 846 mutex_lock(&sensor->lock); 847 848 ret = ar0521_set_stream(sensor, enable); 849 if (!ret) 850 sensor->streaming = enable; 851 852 mutex_unlock(&sensor->lock); 853 return ret; 854 } 855 856 static const struct v4l2_subdev_core_ops ar0521_core_ops = { 857 .log_status = v4l2_ctrl_subdev_log_status, 858 }; 859 860 static const struct v4l2_subdev_video_ops ar0521_video_ops = { 861 .s_stream = ar0521_s_stream, 862 .pre_streamon = ar0521_pre_streamon, 863 .post_streamoff = ar0521_post_streamoff, 864 }; 865 866 static const struct v4l2_subdev_pad_ops ar0521_pad_ops = { 867 .enum_mbus_code = ar0521_enum_mbus_code, 868 .get_fmt = ar0521_get_fmt, 869 .set_fmt = ar0521_set_fmt, 870 }; 871 872 static const struct v4l2_subdev_ops ar0521_subdev_ops = { 873 .core = &ar0521_core_ops, 874 .video = &ar0521_video_ops, 875 .pad = &ar0521_pad_ops, 876 }; 877 878 static int __maybe_unused ar0521_suspend(struct device *dev) 879 { 880 struct v4l2_subdev *sd = dev_get_drvdata(dev); 881 struct ar0521_dev *sensor = to_ar0521_dev(sd); 882 883 if (sensor->streaming) 884 ar0521_set_stream(sensor, 0); 885 886 return 0; 887 } 888 889 static int __maybe_unused ar0521_resume(struct device *dev) 890 { 891 struct v4l2_subdev *sd = dev_get_drvdata(dev); 892 struct ar0521_dev *sensor = to_ar0521_dev(sd); 893 894 if (sensor->streaming) 895 return ar0521_set_stream(sensor, 1); 896 897 return 0; 898 } 899 900 static int ar0521_probe(struct i2c_client *client) 901 { 902 struct v4l2_fwnode_endpoint ep = { 903 .bus_type = V4L2_MBUS_CSI2_DPHY 904 }; 905 struct device *dev = &client->dev; 906 struct fwnode_handle *endpoint; 907 struct ar0521_dev *sensor; 908 unsigned int cnt; 909 int ret; 910 911 sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL); 912 if (!sensor) 913 return -ENOMEM; 914 915 sensor->i2c_client = client; 916 sensor->fmt.width = AR0521_WIDTH_MAX; 917 sensor->fmt.height = AR0521_HEIGHT_MAX; 918 919 endpoint = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), 0, 0, 920 FWNODE_GRAPH_ENDPOINT_NEXT); 921 if (!endpoint) { 922 dev_err(dev, "endpoint node not found\n"); 923 return -EINVAL; 924 } 925 926 ret = v4l2_fwnode_endpoint_parse(endpoint, &ep); 927 fwnode_handle_put(endpoint); 928 if (ret) { 929 dev_err(dev, "could not parse endpoint\n"); 930 return ret; 931 } 932 933 if (ep.bus_type != V4L2_MBUS_CSI2_DPHY) { 934 dev_err(dev, "invalid bus type, must be MIPI CSI2\n"); 935 return -EINVAL; 936 } 937 938 sensor->lane_count = ep.bus.mipi_csi2.num_data_lanes; 939 switch (sensor->lane_count) { 940 case 1: 941 case 2: 942 case 4: 943 break; 944 default: 945 dev_err(dev, "invalid number of MIPI data lanes\n"); 946 return -EINVAL; 947 } 948 949 /* Get master clock (extclk) */ 950 sensor->extclk = devm_clk_get(dev, "extclk"); 951 if (IS_ERR(sensor->extclk)) { 952 dev_err(dev, "failed to get extclk\n"); 953 return PTR_ERR(sensor->extclk); 954 } 955 956 sensor->extclk_freq = clk_get_rate(sensor->extclk); 957 958 if (sensor->extclk_freq < AR0521_EXTCLK_MIN || 959 sensor->extclk_freq > AR0521_EXTCLK_MAX) { 960 dev_err(dev, "extclk frequency out of range: %u Hz\n", 961 sensor->extclk_freq); 962 return -EINVAL; 963 } 964 965 /* Request optional reset pin (usually active low) and assert it */ 966 sensor->reset_gpio = devm_gpiod_get_optional(dev, "reset", 967 GPIOD_OUT_HIGH); 968 969 v4l2_i2c_subdev_init(&sensor->sd, client, &ar0521_subdev_ops); 970 971 sensor->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE; 972 sensor->pad.flags = MEDIA_PAD_FL_SOURCE; 973 sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; 974 ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad); 975 if (ret) 976 return ret; 977 978 for (cnt = 0; cnt < ARRAY_SIZE(ar0521_supply_names); cnt++) { 979 struct regulator *supply = devm_regulator_get(dev, 980 ar0521_supply_names[cnt]); 981 982 if (IS_ERR(supply)) { 983 dev_info(dev, "no %s regulator found: %li\n", 984 ar0521_supply_names[cnt], PTR_ERR(supply)); 985 return PTR_ERR(supply); 986 } 987 sensor->supplies[cnt] = supply; 988 } 989 990 mutex_init(&sensor->lock); 991 992 ret = ar0521_init_controls(sensor); 993 if (ret) 994 goto entity_cleanup; 995 996 ar0521_adj_fmt(&sensor->fmt); 997 998 ret = v4l2_async_register_subdev(&sensor->sd); 999 if (ret) 1000 goto free_ctrls; 1001 1002 /* Turn on the device and enable runtime PM */ 1003 ret = ar0521_power_on(&client->dev); 1004 if (ret) 1005 goto disable; 1006 pm_runtime_set_active(&client->dev); 1007 pm_runtime_enable(&client->dev); 1008 pm_runtime_idle(&client->dev); 1009 return 0; 1010 1011 disable: 1012 v4l2_async_unregister_subdev(&sensor->sd); 1013 media_entity_cleanup(&sensor->sd.entity); 1014 free_ctrls: 1015 v4l2_ctrl_handler_free(&sensor->ctrls.handler); 1016 entity_cleanup: 1017 media_entity_cleanup(&sensor->sd.entity); 1018 mutex_destroy(&sensor->lock); 1019 return ret; 1020 } 1021 1022 static int ar0521_remove(struct i2c_client *client) 1023 { 1024 struct v4l2_subdev *sd = i2c_get_clientdata(client); 1025 struct ar0521_dev *sensor = to_ar0521_dev(sd); 1026 1027 v4l2_async_unregister_subdev(&sensor->sd); 1028 media_entity_cleanup(&sensor->sd.entity); 1029 v4l2_ctrl_handler_free(&sensor->ctrls.handler); 1030 pm_runtime_disable(&client->dev); 1031 if (!pm_runtime_status_suspended(&client->dev)) 1032 ar0521_power_off(&client->dev); 1033 pm_runtime_set_suspended(&client->dev); 1034 mutex_destroy(&sensor->lock); 1035 return 0; 1036 } 1037 1038 static const struct dev_pm_ops ar0521_pm_ops = { 1039 SET_SYSTEM_SLEEP_PM_OPS(ar0521_suspend, ar0521_resume) 1040 SET_RUNTIME_PM_OPS(ar0521_power_off, ar0521_power_on, NULL) 1041 }; 1042 static const struct of_device_id ar0521_dt_ids[] = { 1043 {.compatible = "onnn,ar0521"}, 1044 {} 1045 }; 1046 MODULE_DEVICE_TABLE(of, ar0521_dt_ids); 1047 1048 static struct i2c_driver ar0521_i2c_driver = { 1049 .driver = { 1050 .name = "ar0521", 1051 .pm = &ar0521_pm_ops, 1052 .of_match_table = ar0521_dt_ids, 1053 }, 1054 .probe_new = ar0521_probe, 1055 .remove = ar0521_remove, 1056 }; 1057 1058 module_i2c_driver(ar0521_i2c_driver); 1059 1060 MODULE_DESCRIPTION("AR0521 MIPI Camera subdev driver"); 1061 MODULE_AUTHOR("Krzysztof Hałasa <khalasa@piap.pl>"); 1062 MODULE_LICENSE("GPL"); 1063