1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * Device driver for monitoring ambient light intensity in (lux) and proximity 4 * detection (prox) within the TAOS TSL2571, TSL2671, TMD2671, TSL2771, TMD2771, 5 * TSL2572, TSL2672, TMD2672, TSL2772, and TMD2772 devices. 6 * 7 * Copyright (c) 2012, TAOS Corporation. 8 * Copyright (c) 2017-2018 Brian Masney <masneyb@onstation.org> 9 */ 10 11#include <linux/delay.h> 12#include <linux/errno.h> 13#include <linux/i2c.h> 14#include <linux/interrupt.h> 15#include <linux/kernel.h> 16#include <linux/module.h> 17#include <linux/mutex.h> 18#include <linux/property.h> 19#include <linux/slab.h> 20 21#include <linux/iio/events.h> 22#include <linux/iio/iio.h> 23#include <linux/iio/sysfs.h> 24#include <linux/platform_data/tsl2772.h> 25#include <linux/regulator/consumer.h> 26 27/* Cal defs */ 28#define PROX_STAT_CAL 0 29#define PROX_STAT_SAMP 1 30#define MAX_SAMPLES_CAL 200 31 32/* TSL2772 Device ID */ 33#define TRITON_ID 0x00 34#define SWORDFISH_ID 0x30 35#define HALIBUT_ID 0x20 36 37/* Lux calculation constants */ 38#define TSL2772_LUX_CALC_OVER_FLOW 65535 39 40/* 41 * TAOS Register definitions - Note: depending on device, some of these register 42 * are not used and the register address is benign. 43 */ 44 45/* Register offsets */ 46#define TSL2772_MAX_CONFIG_REG 16 47 48/* Device Registers and Masks */ 49#define TSL2772_CNTRL 0x00 50#define TSL2772_ALS_TIME 0X01 51#define TSL2772_PRX_TIME 0x02 52#define TSL2772_WAIT_TIME 0x03 53#define TSL2772_ALS_MINTHRESHLO 0X04 54#define TSL2772_ALS_MINTHRESHHI 0X05 55#define TSL2772_ALS_MAXTHRESHLO 0X06 56#define TSL2772_ALS_MAXTHRESHHI 0X07 57#define TSL2772_PRX_MINTHRESHLO 0X08 58#define TSL2772_PRX_MINTHRESHHI 0X09 59#define TSL2772_PRX_MAXTHRESHLO 0X0A 60#define TSL2772_PRX_MAXTHRESHHI 0X0B 61#define TSL2772_PERSISTENCE 0x0C 62#define TSL2772_ALS_PRX_CONFIG 0x0D 63#define TSL2772_PRX_COUNT 0x0E 64#define TSL2772_GAIN 0x0F 65#define TSL2772_NOTUSED 0x10 66#define TSL2772_REVID 0x11 67#define TSL2772_CHIPID 0x12 68#define TSL2772_STATUS 0x13 69#define TSL2772_ALS_CHAN0LO 0x14 70#define TSL2772_ALS_CHAN0HI 0x15 71#define TSL2772_ALS_CHAN1LO 0x16 72#define TSL2772_ALS_CHAN1HI 0x17 73#define TSL2772_PRX_LO 0x18 74#define TSL2772_PRX_HI 0x19 75 76/* tsl2772 cmd reg masks */ 77#define TSL2772_CMD_REG 0x80 78#define TSL2772_CMD_SPL_FN 0x60 79#define TSL2772_CMD_REPEAT_PROTO 0x00 80#define TSL2772_CMD_AUTOINC_PROTO 0x20 81 82#define TSL2772_CMD_PROX_INT_CLR 0X05 83#define TSL2772_CMD_ALS_INT_CLR 0x06 84#define TSL2772_CMD_PROXALS_INT_CLR 0X07 85 86/* tsl2772 cntrl reg masks */ 87#define TSL2772_CNTL_ADC_ENBL 0x02 88#define TSL2772_CNTL_PWR_ON 0x01 89 90/* tsl2772 status reg masks */ 91#define TSL2772_STA_ADC_VALID 0x01 92#define TSL2772_STA_PRX_VALID 0x02 93#define TSL2772_STA_ADC_PRX_VALID (TSL2772_STA_ADC_VALID | \ 94 TSL2772_STA_PRX_VALID) 95#define TSL2772_STA_ALS_INTR 0x10 96#define TSL2772_STA_PRX_INTR 0x20 97 98/* tsl2772 cntrl reg masks */ 99#define TSL2772_CNTL_REG_CLEAR 0x00 100#define TSL2772_CNTL_PROX_INT_ENBL 0X20 101#define TSL2772_CNTL_ALS_INT_ENBL 0X10 102#define TSL2772_CNTL_WAIT_TMR_ENBL 0X08 103#define TSL2772_CNTL_PROX_DET_ENBL 0X04 104#define TSL2772_CNTL_PWRON 0x01 105#define TSL2772_CNTL_ALSPON_ENBL 0x03 106#define TSL2772_CNTL_INTALSPON_ENBL 0x13 107#define TSL2772_CNTL_PROXPON_ENBL 0x0F 108#define TSL2772_CNTL_INTPROXPON_ENBL 0x2F 109 110#define TSL2772_ALS_GAIN_TRIM_MIN 250 111#define TSL2772_ALS_GAIN_TRIM_MAX 4000 112 113#define TSL2772_MAX_PROX_LEDS 2 114 115#define TSL2772_BOOT_MIN_SLEEP_TIME 10000 116#define TSL2772_BOOT_MAX_SLEEP_TIME 28000 117 118/* Device family members */ 119enum { 120 tsl2571, 121 tsl2671, 122 tmd2671, 123 tsl2771, 124 tmd2771, 125 tsl2572, 126 tsl2672, 127 tmd2672, 128 tsl2772, 129 tmd2772, 130 apds9930, 131}; 132 133enum { 134 TSL2772_CHIP_UNKNOWN = 0, 135 TSL2772_CHIP_WORKING = 1, 136 TSL2772_CHIP_SUSPENDED = 2 137}; 138 139enum { 140 TSL2772_SUPPLY_VDD = 0, 141 TSL2772_SUPPLY_VDDIO = 1, 142 TSL2772_NUM_SUPPLIES = 2 143}; 144 145/* Per-device data */ 146struct tsl2772_als_info { 147 u16 als_ch0; 148 u16 als_ch1; 149 u16 lux; 150}; 151 152struct tsl2772_chip_info { 153 int chan_table_elements; 154 struct iio_chan_spec channel_with_events[4]; 155 struct iio_chan_spec channel_without_events[4]; 156 const struct iio_info *info; 157}; 158 159static const int tsl2772_led_currents[][2] = { 160 { 100000, TSL2772_100_mA }, 161 { 50000, TSL2772_50_mA }, 162 { 25000, TSL2772_25_mA }, 163 { 13000, TSL2772_13_mA }, 164 { 0, 0 } 165}; 166 167struct tsl2772_chip { 168 kernel_ulong_t id; 169 struct mutex prox_mutex; 170 struct mutex als_mutex; 171 struct i2c_client *client; 172 struct regulator_bulk_data supplies[TSL2772_NUM_SUPPLIES]; 173 u16 prox_data; 174 struct tsl2772_als_info als_cur_info; 175 struct tsl2772_settings settings; 176 struct tsl2772_platform_data *pdata; 177 int als_gain_time_scale; 178 int als_saturation; 179 int tsl2772_chip_status; 180 u8 tsl2772_config[TSL2772_MAX_CONFIG_REG]; 181 const struct tsl2772_chip_info *chip_info; 182 const struct iio_info *info; 183 s64 event_timestamp; 184 /* 185 * This structure is intentionally large to accommodate 186 * updates via sysfs. 187 * Sized to 9 = max 8 segments + 1 termination segment 188 */ 189 struct tsl2772_lux tsl2772_device_lux[TSL2772_MAX_LUX_TABLE_SIZE]; 190}; 191 192/* 193 * Different devices require different coefficents, and these numbers were 194 * derived from the 'Lux Equation' section of the various device datasheets. 195 * All of these coefficients assume a Glass Attenuation (GA) factor of 1. 196 * The coefficients are multiplied by 1000 to avoid floating point operations. 197 * The two rows in each table correspond to the Lux1 and Lux2 equations from 198 * the datasheets. 199 */ 200static const struct tsl2772_lux tsl2x71_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = { 201 { 53000, 106000 }, 202 { 31800, 53000 }, 203 { 0, 0 }, 204}; 205 206static const struct tsl2772_lux tmd2x71_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = { 207 { 24000, 48000 }, 208 { 14400, 24000 }, 209 { 0, 0 }, 210}; 211 212static const struct tsl2772_lux tsl2x72_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = { 213 { 60000, 112200 }, 214 { 37800, 60000 }, 215 { 0, 0 }, 216}; 217 218static const struct tsl2772_lux tmd2x72_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = { 219 { 20000, 35000 }, 220 { 12600, 20000 }, 221 { 0, 0 }, 222}; 223 224static const struct tsl2772_lux apds9930_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = { 225 { 52000, 96824 }, 226 { 38792, 67132 }, 227 { 0, 0 }, 228}; 229 230static const struct tsl2772_lux *tsl2772_default_lux_table_group[] = { 231 [tsl2571] = tsl2x71_lux_table, 232 [tsl2671] = tsl2x71_lux_table, 233 [tmd2671] = tmd2x71_lux_table, 234 [tsl2771] = tsl2x71_lux_table, 235 [tmd2771] = tmd2x71_lux_table, 236 [tsl2572] = tsl2x72_lux_table, 237 [tsl2672] = tsl2x72_lux_table, 238 [tmd2672] = tmd2x72_lux_table, 239 [tsl2772] = tsl2x72_lux_table, 240 [tmd2772] = tmd2x72_lux_table, 241 [apds9930] = apds9930_lux_table, 242}; 243 244static const struct tsl2772_settings tsl2772_default_settings = { 245 .als_time = 255, /* 2.72 / 2.73 ms */ 246 .als_gain = 0, 247 .prox_time = 255, /* 2.72 / 2.73 ms */ 248 .prox_gain = 0, 249 .wait_time = 255, 250 .als_prox_config = 0, 251 .als_gain_trim = 1000, 252 .als_cal_target = 150, 253 .als_persistence = 1, 254 .als_interrupt_en = false, 255 .als_thresh_low = 200, 256 .als_thresh_high = 256, 257 .prox_persistence = 1, 258 .prox_interrupt_en = false, 259 .prox_thres_low = 0, 260 .prox_thres_high = 512, 261 .prox_max_samples_cal = 30, 262 .prox_pulse_count = 8, 263 .prox_diode = TSL2772_DIODE1, 264 .prox_power = TSL2772_100_mA 265}; 266 267static const s16 tsl2772_als_gain[] = { 268 1, 269 8, 270 16, 271 120 272}; 273 274static const s16 tsl2772_prox_gain[] = { 275 1, 276 2, 277 4, 278 8 279}; 280 281static const int tsl2772_int_time_avail[][6] = { 282 [tsl2571] = { 0, 2720, 0, 2720, 0, 696000 }, 283 [tsl2671] = { 0, 2720, 0, 2720, 0, 696000 }, 284 [tmd2671] = { 0, 2720, 0, 2720, 0, 696000 }, 285 [tsl2771] = { 0, 2720, 0, 2720, 0, 696000 }, 286 [tmd2771] = { 0, 2720, 0, 2720, 0, 696000 }, 287 [tsl2572] = { 0, 2730, 0, 2730, 0, 699000 }, 288 [tsl2672] = { 0, 2730, 0, 2730, 0, 699000 }, 289 [tmd2672] = { 0, 2730, 0, 2730, 0, 699000 }, 290 [tsl2772] = { 0, 2730, 0, 2730, 0, 699000 }, 291 [tmd2772] = { 0, 2730, 0, 2730, 0, 699000 }, 292 [apds9930] = { 0, 2730, 0, 2730, 0, 699000 }, 293}; 294 295static int tsl2772_int_calibscale_avail[] = { 1, 8, 16, 120 }; 296 297static int tsl2772_prox_calibscale_avail[] = { 1, 2, 4, 8 }; 298 299/* Channel variations */ 300enum { 301 ALS, 302 PRX, 303 ALSPRX, 304 PRX2, 305 ALSPRX2, 306}; 307 308static const u8 device_channel_config[] = { 309 [tsl2571] = ALS, 310 [tsl2671] = PRX, 311 [tmd2671] = PRX, 312 [tsl2771] = ALSPRX, 313 [tmd2771] = ALSPRX, 314 [tsl2572] = ALS, 315 [tsl2672] = PRX2, 316 [tmd2672] = PRX2, 317 [tsl2772] = ALSPRX2, 318 [tmd2772] = ALSPRX2, 319 [apds9930] = ALSPRX2, 320}; 321 322static int tsl2772_read_status(struct tsl2772_chip *chip) 323{ 324 int ret; 325 326 ret = i2c_smbus_read_byte_data(chip->client, 327 TSL2772_CMD_REG | TSL2772_STATUS); 328 if (ret < 0) 329 dev_err(&chip->client->dev, 330 "%s: failed to read STATUS register: %d\n", __func__, 331 ret); 332 333 return ret; 334} 335 336static int tsl2772_write_control_reg(struct tsl2772_chip *chip, u8 data) 337{ 338 int ret; 339 340 ret = i2c_smbus_write_byte_data(chip->client, 341 TSL2772_CMD_REG | TSL2772_CNTRL, data); 342 if (ret < 0) { 343 dev_err(&chip->client->dev, 344 "%s: failed to write to control register %x: %d\n", 345 __func__, data, ret); 346 } 347 348 return ret; 349} 350 351static int tsl2772_read_autoinc_regs(struct tsl2772_chip *chip, int lower_reg, 352 int upper_reg) 353{ 354 u8 buf[2]; 355 int ret; 356 357 ret = i2c_smbus_write_byte(chip->client, 358 TSL2772_CMD_REG | TSL2772_CMD_AUTOINC_PROTO | 359 lower_reg); 360 if (ret < 0) { 361 dev_err(&chip->client->dev, 362 "%s: failed to enable auto increment protocol: %d\n", 363 __func__, ret); 364 return ret; 365 } 366 367 ret = i2c_smbus_read_byte_data(chip->client, 368 TSL2772_CMD_REG | lower_reg); 369 if (ret < 0) { 370 dev_err(&chip->client->dev, 371 "%s: failed to read from register %x: %d\n", __func__, 372 lower_reg, ret); 373 return ret; 374 } 375 buf[0] = ret; 376 377 ret = i2c_smbus_read_byte_data(chip->client, 378 TSL2772_CMD_REG | upper_reg); 379 if (ret < 0) { 380 dev_err(&chip->client->dev, 381 "%s: failed to read from register %x: %d\n", __func__, 382 upper_reg, ret); 383 return ret; 384 } 385 buf[1] = ret; 386 387 ret = i2c_smbus_write_byte(chip->client, 388 TSL2772_CMD_REG | TSL2772_CMD_REPEAT_PROTO | 389 lower_reg); 390 if (ret < 0) { 391 dev_err(&chip->client->dev, 392 "%s: failed to enable repeated byte protocol: %d\n", 393 __func__, ret); 394 return ret; 395 } 396 397 return le16_to_cpup((const __le16 *)&buf[0]); 398} 399 400/** 401 * tsl2772_get_lux() - Reads and calculates current lux value. 402 * @indio_dev: pointer to IIO device 403 * 404 * The raw ch0 and ch1 values of the ambient light sensed in the last 405 * integration cycle are read from the device. The raw values are multiplied 406 * by a device-specific scale factor, and divided by the integration time and 407 * device gain. The code supports multiple lux equations through the lux table 408 * coefficients. A lux gain trim is applied to each lux equation, and then the 409 * maximum lux within the interval 0..65535 is selected. 410 */ 411static int tsl2772_get_lux(struct iio_dev *indio_dev) 412{ 413 struct tsl2772_chip *chip = iio_priv(indio_dev); 414 struct tsl2772_lux *p; 415 int max_lux, ret; 416 bool overflow; 417 418 mutex_lock(&chip->als_mutex); 419 420 if (chip->tsl2772_chip_status != TSL2772_CHIP_WORKING) { 421 dev_err(&chip->client->dev, "%s: device is not enabled\n", 422 __func__); 423 ret = -EBUSY; 424 goto out_unlock; 425 } 426 427 ret = tsl2772_read_status(chip); 428 if (ret < 0) 429 goto out_unlock; 430 431 if (!(ret & TSL2772_STA_ADC_VALID)) { 432 dev_err(&chip->client->dev, 433 "%s: data not valid yet\n", __func__); 434 ret = chip->als_cur_info.lux; /* return LAST VALUE */ 435 goto out_unlock; 436 } 437 438 ret = tsl2772_read_autoinc_regs(chip, TSL2772_ALS_CHAN0LO, 439 TSL2772_ALS_CHAN0HI); 440 if (ret < 0) 441 goto out_unlock; 442 chip->als_cur_info.als_ch0 = ret; 443 444 ret = tsl2772_read_autoinc_regs(chip, TSL2772_ALS_CHAN1LO, 445 TSL2772_ALS_CHAN1HI); 446 if (ret < 0) 447 goto out_unlock; 448 chip->als_cur_info.als_ch1 = ret; 449 450 if (chip->als_cur_info.als_ch0 >= chip->als_saturation) { 451 max_lux = TSL2772_LUX_CALC_OVER_FLOW; 452 goto update_struct_with_max_lux; 453 } 454 455 if (!chip->als_cur_info.als_ch0) { 456 /* have no data, so return LAST VALUE */ 457 ret = chip->als_cur_info.lux; 458 goto out_unlock; 459 } 460 461 max_lux = 0; 462 overflow = false; 463 for (p = (struct tsl2772_lux *)chip->tsl2772_device_lux; p->ch0 != 0; 464 p++) { 465 int lux; 466 467 lux = ((chip->als_cur_info.als_ch0 * p->ch0) - 468 (chip->als_cur_info.als_ch1 * p->ch1)) / 469 chip->als_gain_time_scale; 470 471 /* 472 * The als_gain_trim can have a value within the range 250..4000 473 * and is a multiplier for the lux. A trim of 1000 makes no 474 * changes to the lux, less than 1000 scales it down, and 475 * greater than 1000 scales it up. 476 */ 477 lux = (lux * chip->settings.als_gain_trim) / 1000; 478 479 if (lux > TSL2772_LUX_CALC_OVER_FLOW) { 480 overflow = true; 481 continue; 482 } 483 484 max_lux = max(max_lux, lux); 485 } 486 487 if (overflow && max_lux == 0) 488 max_lux = TSL2772_LUX_CALC_OVER_FLOW; 489 490update_struct_with_max_lux: 491 chip->als_cur_info.lux = max_lux; 492 ret = max_lux; 493 494out_unlock: 495 mutex_unlock(&chip->als_mutex); 496 497 return ret; 498} 499 500/** 501 * tsl2772_get_prox() - Reads proximity data registers and updates 502 * chip->prox_data. 503 * 504 * @indio_dev: pointer to IIO device 505 */ 506static int tsl2772_get_prox(struct iio_dev *indio_dev) 507{ 508 struct tsl2772_chip *chip = iio_priv(indio_dev); 509 int ret; 510 511 mutex_lock(&chip->prox_mutex); 512 513 ret = tsl2772_read_status(chip); 514 if (ret < 0) 515 goto prox_poll_err; 516 517 switch (chip->id) { 518 case tsl2571: 519 case tsl2671: 520 case tmd2671: 521 case tsl2771: 522 case tmd2771: 523 if (!(ret & TSL2772_STA_ADC_VALID)) { 524 ret = -EINVAL; 525 goto prox_poll_err; 526 } 527 break; 528 case tsl2572: 529 case tsl2672: 530 case tmd2672: 531 case tsl2772: 532 case tmd2772: 533 case apds9930: 534 if (!(ret & TSL2772_STA_PRX_VALID)) { 535 ret = -EINVAL; 536 goto prox_poll_err; 537 } 538 break; 539 } 540 541 ret = tsl2772_read_autoinc_regs(chip, TSL2772_PRX_LO, TSL2772_PRX_HI); 542 if (ret < 0) 543 goto prox_poll_err; 544 chip->prox_data = ret; 545 546prox_poll_err: 547 mutex_unlock(&chip->prox_mutex); 548 549 return ret; 550} 551 552static int tsl2772_read_prox_led_current(struct tsl2772_chip *chip) 553{ 554 struct device *dev = &chip->client->dev; 555 int ret, tmp, i; 556 557 ret = device_property_read_u32(dev, "led-max-microamp", &tmp); 558 if (ret < 0) 559 return ret; 560 561 for (i = 0; tsl2772_led_currents[i][0] != 0; i++) { 562 if (tmp == tsl2772_led_currents[i][0]) { 563 chip->settings.prox_power = tsl2772_led_currents[i][1]; 564 return 0; 565 } 566 } 567 568 dev_err(dev, "Invalid value %d for led-max-microamp\n", tmp); 569 570 return -EINVAL; 571} 572 573static int tsl2772_read_prox_diodes(struct tsl2772_chip *chip) 574{ 575 struct device *dev = &chip->client->dev; 576 int i, ret, num_leds, prox_diode_mask; 577 u32 leds[TSL2772_MAX_PROX_LEDS]; 578 579 ret = device_property_count_u32(dev, "amstaos,proximity-diodes"); 580 if (ret < 0) 581 return ret; 582 583 num_leds = ret; 584 if (num_leds > TSL2772_MAX_PROX_LEDS) 585 num_leds = TSL2772_MAX_PROX_LEDS; 586 587 ret = device_property_read_u32_array(dev, "amstaos,proximity-diodes", leds, num_leds); 588 if (ret < 0) { 589 dev_err(dev, "Invalid value for amstaos,proximity-diodes: %d.\n", ret); 590 return ret; 591 } 592 593 prox_diode_mask = 0; 594 for (i = 0; i < num_leds; i++) { 595 if (leds[i] == 0) 596 prox_diode_mask |= TSL2772_DIODE0; 597 else if (leds[i] == 1) 598 prox_diode_mask |= TSL2772_DIODE1; 599 else { 600 dev_err(dev, "Invalid value %d in amstaos,proximity-diodes.\n", leds[i]); 601 return -EINVAL; 602 } 603 } 604 chip->settings.prox_diode = prox_diode_mask; 605 606 return 0; 607} 608 609static void tsl2772_parse_dt(struct tsl2772_chip *chip) 610{ 611 tsl2772_read_prox_led_current(chip); 612 tsl2772_read_prox_diodes(chip); 613} 614 615/** 616 * tsl2772_defaults() - Populates the device nominal operating parameters 617 * with those provided by a 'platform' data struct or 618 * with prefined defaults. 619 * 620 * @chip: pointer to device structure. 621 */ 622static void tsl2772_defaults(struct tsl2772_chip *chip) 623{ 624 /* If Operational settings defined elsewhere.. */ 625 if (chip->pdata && chip->pdata->platform_default_settings) 626 memcpy(&chip->settings, chip->pdata->platform_default_settings, 627 sizeof(tsl2772_default_settings)); 628 else 629 memcpy(&chip->settings, &tsl2772_default_settings, 630 sizeof(tsl2772_default_settings)); 631 632 /* Load up the proper lux table. */ 633 if (chip->pdata && chip->pdata->platform_lux_table[0].ch0 != 0) 634 memcpy(chip->tsl2772_device_lux, 635 chip->pdata->platform_lux_table, 636 sizeof(chip->pdata->platform_lux_table)); 637 else 638 memcpy(chip->tsl2772_device_lux, 639 tsl2772_default_lux_table_group[chip->id], 640 TSL2772_DEFAULT_TABLE_BYTES); 641 642 tsl2772_parse_dt(chip); 643} 644 645/** 646 * tsl2772_als_calibrate() - Obtain single reading and calculate 647 * the als_gain_trim. 648 * 649 * @indio_dev: pointer to IIO device 650 */ 651static int tsl2772_als_calibrate(struct iio_dev *indio_dev) 652{ 653 struct tsl2772_chip *chip = iio_priv(indio_dev); 654 int ret, lux_val; 655 656 ret = i2c_smbus_read_byte_data(chip->client, 657 TSL2772_CMD_REG | TSL2772_CNTRL); 658 if (ret < 0) { 659 dev_err(&chip->client->dev, 660 "%s: failed to read from the CNTRL register\n", 661 __func__); 662 return ret; 663 } 664 665 if ((ret & (TSL2772_CNTL_ADC_ENBL | TSL2772_CNTL_PWR_ON)) 666 != (TSL2772_CNTL_ADC_ENBL | TSL2772_CNTL_PWR_ON)) { 667 dev_err(&chip->client->dev, 668 "%s: Device is not powered on and/or ADC is not enabled\n", 669 __func__); 670 return -EINVAL; 671 } else if ((ret & TSL2772_STA_ADC_VALID) != TSL2772_STA_ADC_VALID) { 672 dev_err(&chip->client->dev, 673 "%s: The two ADC channels have not completed an integration cycle\n", 674 __func__); 675 return -ENODATA; 676 } 677 678 lux_val = tsl2772_get_lux(indio_dev); 679 if (lux_val < 0) { 680 dev_err(&chip->client->dev, 681 "%s: failed to get lux\n", __func__); 682 return lux_val; 683 } 684 if (lux_val == 0) 685 return -ERANGE; 686 687 ret = (chip->settings.als_cal_target * chip->settings.als_gain_trim) / 688 lux_val; 689 if (ret < TSL2772_ALS_GAIN_TRIM_MIN || ret > TSL2772_ALS_GAIN_TRIM_MAX) 690 return -ERANGE; 691 692 chip->settings.als_gain_trim = ret; 693 694 return ret; 695} 696 697static void tsl2772_disable_regulators_action(void *_data) 698{ 699 struct tsl2772_chip *chip = _data; 700 701 regulator_bulk_disable(ARRAY_SIZE(chip->supplies), chip->supplies); 702} 703 704static int tsl2772_chip_on(struct iio_dev *indio_dev) 705{ 706 struct tsl2772_chip *chip = iio_priv(indio_dev); 707 int ret, i, als_count, als_time_us; 708 u8 *dev_reg, reg_val; 709 710 /* Non calculated parameters */ 711 chip->tsl2772_config[TSL2772_ALS_TIME] = chip->settings.als_time; 712 chip->tsl2772_config[TSL2772_PRX_TIME] = chip->settings.prox_time; 713 chip->tsl2772_config[TSL2772_WAIT_TIME] = chip->settings.wait_time; 714 chip->tsl2772_config[TSL2772_ALS_PRX_CONFIG] = 715 chip->settings.als_prox_config; 716 717 chip->tsl2772_config[TSL2772_ALS_MINTHRESHLO] = 718 (chip->settings.als_thresh_low) & 0xFF; 719 chip->tsl2772_config[TSL2772_ALS_MINTHRESHHI] = 720 (chip->settings.als_thresh_low >> 8) & 0xFF; 721 chip->tsl2772_config[TSL2772_ALS_MAXTHRESHLO] = 722 (chip->settings.als_thresh_high) & 0xFF; 723 chip->tsl2772_config[TSL2772_ALS_MAXTHRESHHI] = 724 (chip->settings.als_thresh_high >> 8) & 0xFF; 725 chip->tsl2772_config[TSL2772_PERSISTENCE] = 726 (chip->settings.prox_persistence & 0xFF) << 4 | 727 (chip->settings.als_persistence & 0xFF); 728 729 chip->tsl2772_config[TSL2772_PRX_COUNT] = 730 chip->settings.prox_pulse_count; 731 chip->tsl2772_config[TSL2772_PRX_MINTHRESHLO] = 732 (chip->settings.prox_thres_low) & 0xFF; 733 chip->tsl2772_config[TSL2772_PRX_MINTHRESHHI] = 734 (chip->settings.prox_thres_low >> 8) & 0xFF; 735 chip->tsl2772_config[TSL2772_PRX_MAXTHRESHLO] = 736 (chip->settings.prox_thres_high) & 0xFF; 737 chip->tsl2772_config[TSL2772_PRX_MAXTHRESHHI] = 738 (chip->settings.prox_thres_high >> 8) & 0xFF; 739 740 /* and make sure we're not already on */ 741 if (chip->tsl2772_chip_status == TSL2772_CHIP_WORKING) { 742 /* if forcing a register update - turn off, then on */ 743 dev_info(&chip->client->dev, "device is already enabled\n"); 744 return -EINVAL; 745 } 746 747 /* Set the gain based on tsl2772_settings struct */ 748 chip->tsl2772_config[TSL2772_GAIN] = 749 (chip->settings.als_gain & 0xFF) | 750 ((chip->settings.prox_gain & 0xFF) << 2) | 751 (chip->settings.prox_diode << 4) | 752 (chip->settings.prox_power << 6); 753 754 /* set chip time scaling and saturation */ 755 als_count = 256 - chip->settings.als_time; 756 als_time_us = als_count * tsl2772_int_time_avail[chip->id][3]; 757 chip->als_saturation = als_count * 768; /* 75% of full scale */ 758 chip->als_gain_time_scale = als_time_us * 759 tsl2772_als_gain[chip->settings.als_gain]; 760 761 /* 762 * TSL2772 Specific power-on / adc enable sequence 763 * Power on the device 1st. 764 */ 765 ret = tsl2772_write_control_reg(chip, TSL2772_CNTL_PWR_ON); 766 if (ret < 0) 767 return ret; 768 769 /* 770 * Use the following shadow copy for our delay before enabling ADC. 771 * Write all the registers. 772 */ 773 for (i = 0, dev_reg = chip->tsl2772_config; 774 i < TSL2772_MAX_CONFIG_REG; i++) { 775 int reg = TSL2772_CMD_REG + i; 776 777 ret = i2c_smbus_write_byte_data(chip->client, reg, 778 *dev_reg++); 779 if (ret < 0) { 780 dev_err(&chip->client->dev, 781 "%s: failed to write to register %x: %d\n", 782 __func__, reg, ret); 783 return ret; 784 } 785 } 786 787 /* Power-on settling time */ 788 usleep_range(3000, 3500); 789 790 reg_val = TSL2772_CNTL_PWR_ON | TSL2772_CNTL_ADC_ENBL | 791 TSL2772_CNTL_PROX_DET_ENBL; 792 if (chip->settings.als_interrupt_en) 793 reg_val |= TSL2772_CNTL_ALS_INT_ENBL; 794 if (chip->settings.prox_interrupt_en) 795 reg_val |= TSL2772_CNTL_PROX_INT_ENBL; 796 797 ret = tsl2772_write_control_reg(chip, reg_val); 798 if (ret < 0) 799 return ret; 800 801 ret = i2c_smbus_write_byte(chip->client, 802 TSL2772_CMD_REG | TSL2772_CMD_SPL_FN | 803 TSL2772_CMD_PROXALS_INT_CLR); 804 if (ret < 0) { 805 dev_err(&chip->client->dev, 806 "%s: failed to clear interrupt status: %d\n", 807 __func__, ret); 808 return ret; 809 } 810 811 chip->tsl2772_chip_status = TSL2772_CHIP_WORKING; 812 813 return ret; 814} 815 816static int tsl2772_chip_off(struct iio_dev *indio_dev) 817{ 818 struct tsl2772_chip *chip = iio_priv(indio_dev); 819 820 /* turn device off */ 821 chip->tsl2772_chip_status = TSL2772_CHIP_SUSPENDED; 822 return tsl2772_write_control_reg(chip, 0x00); 823} 824 825static void tsl2772_chip_off_action(void *data) 826{ 827 struct iio_dev *indio_dev = data; 828 829 tsl2772_chip_off(indio_dev); 830} 831 832/** 833 * tsl2772_invoke_change - power cycle the device to implement the user 834 * parameters 835 * @indio_dev: pointer to IIO device 836 * 837 * Obtain and lock both ALS and PROX resources, determine and save device state 838 * (On/Off), cycle device to implement updated parameter, put device back into 839 * proper state, and unlock resource. 840 */ 841static int tsl2772_invoke_change(struct iio_dev *indio_dev) 842{ 843 struct tsl2772_chip *chip = iio_priv(indio_dev); 844 int device_status = chip->tsl2772_chip_status; 845 int ret; 846 847 mutex_lock(&chip->als_mutex); 848 mutex_lock(&chip->prox_mutex); 849 850 if (device_status == TSL2772_CHIP_WORKING) { 851 ret = tsl2772_chip_off(indio_dev); 852 if (ret < 0) 853 goto unlock; 854 } 855 856 ret = tsl2772_chip_on(indio_dev); 857 858unlock: 859 mutex_unlock(&chip->prox_mutex); 860 mutex_unlock(&chip->als_mutex); 861 862 return ret; 863} 864 865static int tsl2772_prox_cal(struct iio_dev *indio_dev) 866{ 867 struct tsl2772_chip *chip = iio_priv(indio_dev); 868 int prox_history[MAX_SAMPLES_CAL + 1]; 869 int i, ret, mean, max, sample_sum; 870 871 if (chip->settings.prox_max_samples_cal < 1 || 872 chip->settings.prox_max_samples_cal > MAX_SAMPLES_CAL) 873 return -EINVAL; 874 875 for (i = 0; i < chip->settings.prox_max_samples_cal; i++) { 876 usleep_range(15000, 17500); 877 ret = tsl2772_get_prox(indio_dev); 878 if (ret < 0) 879 return ret; 880 881 prox_history[i] = chip->prox_data; 882 } 883 884 sample_sum = 0; 885 max = INT_MIN; 886 for (i = 0; i < chip->settings.prox_max_samples_cal; i++) { 887 sample_sum += prox_history[i]; 888 max = max(max, prox_history[i]); 889 } 890 mean = sample_sum / chip->settings.prox_max_samples_cal; 891 892 chip->settings.prox_thres_high = (max << 1) - mean; 893 894 return tsl2772_invoke_change(indio_dev); 895} 896 897static int tsl2772_read_avail(struct iio_dev *indio_dev, 898 struct iio_chan_spec const *chan, 899 const int **vals, int *type, int *length, 900 long mask) 901{ 902 struct tsl2772_chip *chip = iio_priv(indio_dev); 903 904 switch (mask) { 905 case IIO_CHAN_INFO_CALIBSCALE: 906 if (chan->type == IIO_INTENSITY) { 907 *length = ARRAY_SIZE(tsl2772_int_calibscale_avail); 908 *vals = tsl2772_int_calibscale_avail; 909 } else { 910 *length = ARRAY_SIZE(tsl2772_prox_calibscale_avail); 911 *vals = tsl2772_prox_calibscale_avail; 912 } 913 *type = IIO_VAL_INT; 914 return IIO_AVAIL_LIST; 915 case IIO_CHAN_INFO_INT_TIME: 916 *length = ARRAY_SIZE(tsl2772_int_time_avail[chip->id]); 917 *vals = tsl2772_int_time_avail[chip->id]; 918 *type = IIO_VAL_INT_PLUS_MICRO; 919 return IIO_AVAIL_RANGE; 920 } 921 922 return -EINVAL; 923} 924 925static ssize_t in_illuminance0_target_input_show(struct device *dev, 926 struct device_attribute *attr, 927 char *buf) 928{ 929 struct tsl2772_chip *chip = iio_priv(dev_to_iio_dev(dev)); 930 931 return scnprintf(buf, PAGE_SIZE, "%d\n", chip->settings.als_cal_target); 932} 933 934static ssize_t in_illuminance0_target_input_store(struct device *dev, 935 struct device_attribute *attr, 936 const char *buf, size_t len) 937{ 938 struct iio_dev *indio_dev = dev_to_iio_dev(dev); 939 struct tsl2772_chip *chip = iio_priv(indio_dev); 940 u16 value; 941 int ret; 942 943 if (kstrtou16(buf, 0, &value)) 944 return -EINVAL; 945 946 chip->settings.als_cal_target = value; 947 ret = tsl2772_invoke_change(indio_dev); 948 if (ret < 0) 949 return ret; 950 951 return len; 952} 953 954static ssize_t in_illuminance0_calibrate_store(struct device *dev, 955 struct device_attribute *attr, 956 const char *buf, size_t len) 957{ 958 struct iio_dev *indio_dev = dev_to_iio_dev(dev); 959 bool value; 960 int ret; 961 962 if (kstrtobool(buf, &value) || !value) 963 return -EINVAL; 964 965 ret = tsl2772_als_calibrate(indio_dev); 966 if (ret < 0) 967 return ret; 968 969 ret = tsl2772_invoke_change(indio_dev); 970 if (ret < 0) 971 return ret; 972 973 return len; 974} 975 976static ssize_t in_illuminance0_lux_table_show(struct device *dev, 977 struct device_attribute *attr, 978 char *buf) 979{ 980 struct tsl2772_chip *chip = iio_priv(dev_to_iio_dev(dev)); 981 int i = 0; 982 int offset = 0; 983 984 while (i < TSL2772_MAX_LUX_TABLE_SIZE) { 985 offset += scnprintf(buf + offset, PAGE_SIZE - offset, "%u,%u,", 986 chip->tsl2772_device_lux[i].ch0, 987 chip->tsl2772_device_lux[i].ch1); 988 if (chip->tsl2772_device_lux[i].ch0 == 0) { 989 /* 990 * We just printed the first "0" entry. 991 * Now get rid of the extra "," and break. 992 */ 993 offset--; 994 break; 995 } 996 i++; 997 } 998 999 offset += scnprintf(buf + offset, PAGE_SIZE - offset, "\n"); 1000 return offset; 1001} 1002 1003static ssize_t in_illuminance0_lux_table_store(struct device *dev, 1004 struct device_attribute *attr, 1005 const char *buf, size_t len) 1006{ 1007 struct iio_dev *indio_dev = dev_to_iio_dev(dev); 1008 struct tsl2772_chip *chip = iio_priv(indio_dev); 1009 int value[ARRAY_SIZE(chip->tsl2772_device_lux) * 2 + 1]; 1010 int n, ret; 1011 1012 get_options(buf, ARRAY_SIZE(value), value); 1013 1014 /* 1015 * We now have an array of ints starting at value[1], and 1016 * enumerated by value[0]. 1017 * We expect each group of two ints to be one table entry, 1018 * and the last table entry is all 0. 1019 */ 1020 n = value[0]; 1021 if ((n % 2) || n < 4 || 1022 n > ((ARRAY_SIZE(chip->tsl2772_device_lux) - 1) * 2)) 1023 return -EINVAL; 1024 1025 if ((value[(n - 1)] | value[n]) != 0) 1026 return -EINVAL; 1027 1028 if (chip->tsl2772_chip_status == TSL2772_CHIP_WORKING) { 1029 ret = tsl2772_chip_off(indio_dev); 1030 if (ret < 0) 1031 return ret; 1032 } 1033 1034 /* Zero out the table */ 1035 memset(chip->tsl2772_device_lux, 0, sizeof(chip->tsl2772_device_lux)); 1036 memcpy(chip->tsl2772_device_lux, &value[1], (value[0] * 4)); 1037 1038 ret = tsl2772_invoke_change(indio_dev); 1039 if (ret < 0) 1040 return ret; 1041 1042 return len; 1043} 1044 1045static ssize_t in_proximity0_calibrate_store(struct device *dev, 1046 struct device_attribute *attr, 1047 const char *buf, size_t len) 1048{ 1049 struct iio_dev *indio_dev = dev_to_iio_dev(dev); 1050 bool value; 1051 int ret; 1052 1053 if (kstrtobool(buf, &value) || !value) 1054 return -EINVAL; 1055 1056 ret = tsl2772_prox_cal(indio_dev); 1057 if (ret < 0) 1058 return ret; 1059 1060 ret = tsl2772_invoke_change(indio_dev); 1061 if (ret < 0) 1062 return ret; 1063 1064 return len; 1065} 1066 1067static int tsl2772_read_interrupt_config(struct iio_dev *indio_dev, 1068 const struct iio_chan_spec *chan, 1069 enum iio_event_type type, 1070 enum iio_event_direction dir) 1071{ 1072 struct tsl2772_chip *chip = iio_priv(indio_dev); 1073 1074 if (chan->type == IIO_INTENSITY) 1075 return chip->settings.als_interrupt_en; 1076 else 1077 return chip->settings.prox_interrupt_en; 1078} 1079 1080static int tsl2772_write_interrupt_config(struct iio_dev *indio_dev, 1081 const struct iio_chan_spec *chan, 1082 enum iio_event_type type, 1083 enum iio_event_direction dir, 1084 int val) 1085{ 1086 struct tsl2772_chip *chip = iio_priv(indio_dev); 1087 1088 if (chan->type == IIO_INTENSITY) 1089 chip->settings.als_interrupt_en = val ? true : false; 1090 else 1091 chip->settings.prox_interrupt_en = val ? true : false; 1092 1093 return tsl2772_invoke_change(indio_dev); 1094} 1095 1096static int tsl2772_write_event_value(struct iio_dev *indio_dev, 1097 const struct iio_chan_spec *chan, 1098 enum iio_event_type type, 1099 enum iio_event_direction dir, 1100 enum iio_event_info info, 1101 int val, int val2) 1102{ 1103 struct tsl2772_chip *chip = iio_priv(indio_dev); 1104 int ret = -EINVAL, count, persistence; 1105 u8 time; 1106 1107 switch (info) { 1108 case IIO_EV_INFO_VALUE: 1109 if (chan->type == IIO_INTENSITY) { 1110 switch (dir) { 1111 case IIO_EV_DIR_RISING: 1112 chip->settings.als_thresh_high = val; 1113 ret = 0; 1114 break; 1115 case IIO_EV_DIR_FALLING: 1116 chip->settings.als_thresh_low = val; 1117 ret = 0; 1118 break; 1119 default: 1120 break; 1121 } 1122 } else { 1123 switch (dir) { 1124 case IIO_EV_DIR_RISING: 1125 chip->settings.prox_thres_high = val; 1126 ret = 0; 1127 break; 1128 case IIO_EV_DIR_FALLING: 1129 chip->settings.prox_thres_low = val; 1130 ret = 0; 1131 break; 1132 default: 1133 break; 1134 } 1135 } 1136 break; 1137 case IIO_EV_INFO_PERIOD: 1138 if (chan->type == IIO_INTENSITY) 1139 time = chip->settings.als_time; 1140 else 1141 time = chip->settings.prox_time; 1142 1143 count = 256 - time; 1144 persistence = ((val * 1000000) + val2) / 1145 (count * tsl2772_int_time_avail[chip->id][3]); 1146 1147 if (chan->type == IIO_INTENSITY) { 1148 /* ALS filter values are 1, 2, 3, 5, 10, 15, ..., 60 */ 1149 if (persistence > 3) 1150 persistence = (persistence / 5) + 3; 1151 1152 chip->settings.als_persistence = persistence; 1153 } else { 1154 chip->settings.prox_persistence = persistence; 1155 } 1156 1157 ret = 0; 1158 break; 1159 default: 1160 break; 1161 } 1162 1163 if (ret < 0) 1164 return ret; 1165 1166 return tsl2772_invoke_change(indio_dev); 1167} 1168 1169static int tsl2772_read_event_value(struct iio_dev *indio_dev, 1170 const struct iio_chan_spec *chan, 1171 enum iio_event_type type, 1172 enum iio_event_direction dir, 1173 enum iio_event_info info, 1174 int *val, int *val2) 1175{ 1176 struct tsl2772_chip *chip = iio_priv(indio_dev); 1177 int filter_delay, persistence; 1178 u8 time; 1179 1180 switch (info) { 1181 case IIO_EV_INFO_VALUE: 1182 if (chan->type == IIO_INTENSITY) { 1183 switch (dir) { 1184 case IIO_EV_DIR_RISING: 1185 *val = chip->settings.als_thresh_high; 1186 return IIO_VAL_INT; 1187 case IIO_EV_DIR_FALLING: 1188 *val = chip->settings.als_thresh_low; 1189 return IIO_VAL_INT; 1190 default: 1191 return -EINVAL; 1192 } 1193 } else { 1194 switch (dir) { 1195 case IIO_EV_DIR_RISING: 1196 *val = chip->settings.prox_thres_high; 1197 return IIO_VAL_INT; 1198 case IIO_EV_DIR_FALLING: 1199 *val = chip->settings.prox_thres_low; 1200 return IIO_VAL_INT; 1201 default: 1202 return -EINVAL; 1203 } 1204 } 1205 break; 1206 case IIO_EV_INFO_PERIOD: 1207 if (chan->type == IIO_INTENSITY) { 1208 time = chip->settings.als_time; 1209 persistence = chip->settings.als_persistence; 1210 1211 /* ALS filter values are 1, 2, 3, 5, 10, 15, ..., 60 */ 1212 if (persistence > 3) 1213 persistence = (persistence - 3) * 5; 1214 } else { 1215 time = chip->settings.prox_time; 1216 persistence = chip->settings.prox_persistence; 1217 } 1218 1219 filter_delay = persistence * (256 - time) * 1220 tsl2772_int_time_avail[chip->id][3]; 1221 1222 *val = filter_delay / 1000000; 1223 *val2 = filter_delay % 1000000; 1224 return IIO_VAL_INT_PLUS_MICRO; 1225 default: 1226 return -EINVAL; 1227 } 1228} 1229 1230static int tsl2772_read_raw(struct iio_dev *indio_dev, 1231 struct iio_chan_spec const *chan, 1232 int *val, 1233 int *val2, 1234 long mask) 1235{ 1236 struct tsl2772_chip *chip = iio_priv(indio_dev); 1237 1238 switch (mask) { 1239 case IIO_CHAN_INFO_PROCESSED: 1240 switch (chan->type) { 1241 case IIO_LIGHT: 1242 tsl2772_get_lux(indio_dev); 1243 *val = chip->als_cur_info.lux; 1244 return IIO_VAL_INT; 1245 default: 1246 return -EINVAL; 1247 } 1248 case IIO_CHAN_INFO_RAW: 1249 switch (chan->type) { 1250 case IIO_INTENSITY: 1251 tsl2772_get_lux(indio_dev); 1252 if (chan->channel == 0) 1253 *val = chip->als_cur_info.als_ch0; 1254 else 1255 *val = chip->als_cur_info.als_ch1; 1256 return IIO_VAL_INT; 1257 case IIO_PROXIMITY: 1258 tsl2772_get_prox(indio_dev); 1259 *val = chip->prox_data; 1260 return IIO_VAL_INT; 1261 default: 1262 return -EINVAL; 1263 } 1264 break; 1265 case IIO_CHAN_INFO_CALIBSCALE: 1266 if (chan->type == IIO_LIGHT) 1267 *val = tsl2772_als_gain[chip->settings.als_gain]; 1268 else 1269 *val = tsl2772_prox_gain[chip->settings.prox_gain]; 1270 return IIO_VAL_INT; 1271 case IIO_CHAN_INFO_CALIBBIAS: 1272 *val = chip->settings.als_gain_trim; 1273 return IIO_VAL_INT; 1274 case IIO_CHAN_INFO_INT_TIME: 1275 *val = 0; 1276 *val2 = (256 - chip->settings.als_time) * 1277 tsl2772_int_time_avail[chip->id][3]; 1278 return IIO_VAL_INT_PLUS_MICRO; 1279 default: 1280 return -EINVAL; 1281 } 1282} 1283 1284static int tsl2772_write_raw(struct iio_dev *indio_dev, 1285 struct iio_chan_spec const *chan, 1286 int val, 1287 int val2, 1288 long mask) 1289{ 1290 struct tsl2772_chip *chip = iio_priv(indio_dev); 1291 1292 switch (mask) { 1293 case IIO_CHAN_INFO_CALIBSCALE: 1294 if (chan->type == IIO_INTENSITY) { 1295 switch (val) { 1296 case 1: 1297 chip->settings.als_gain = 0; 1298 break; 1299 case 8: 1300 chip->settings.als_gain = 1; 1301 break; 1302 case 16: 1303 chip->settings.als_gain = 2; 1304 break; 1305 case 120: 1306 chip->settings.als_gain = 3; 1307 break; 1308 default: 1309 return -EINVAL; 1310 } 1311 } else { 1312 switch (val) { 1313 case 1: 1314 chip->settings.prox_gain = 0; 1315 break; 1316 case 2: 1317 chip->settings.prox_gain = 1; 1318 break; 1319 case 4: 1320 chip->settings.prox_gain = 2; 1321 break; 1322 case 8: 1323 chip->settings.prox_gain = 3; 1324 break; 1325 default: 1326 return -EINVAL; 1327 } 1328 } 1329 break; 1330 case IIO_CHAN_INFO_CALIBBIAS: 1331 if (val < TSL2772_ALS_GAIN_TRIM_MIN || 1332 val > TSL2772_ALS_GAIN_TRIM_MAX) 1333 return -EINVAL; 1334 1335 chip->settings.als_gain_trim = val; 1336 break; 1337 case IIO_CHAN_INFO_INT_TIME: 1338 if (val != 0 || val2 < tsl2772_int_time_avail[chip->id][1] || 1339 val2 > tsl2772_int_time_avail[chip->id][5]) 1340 return -EINVAL; 1341 1342 chip->settings.als_time = 256 - 1343 (val2 / tsl2772_int_time_avail[chip->id][3]); 1344 break; 1345 default: 1346 return -EINVAL; 1347 } 1348 1349 return tsl2772_invoke_change(indio_dev); 1350} 1351 1352static DEVICE_ATTR_RW(in_illuminance0_target_input); 1353 1354static DEVICE_ATTR_WO(in_illuminance0_calibrate); 1355 1356static DEVICE_ATTR_WO(in_proximity0_calibrate); 1357 1358static DEVICE_ATTR_RW(in_illuminance0_lux_table); 1359 1360/* Use the default register values to identify the Taos device */ 1361static int tsl2772_device_id_verif(int id, int target) 1362{ 1363 switch (target) { 1364 case tsl2571: 1365 case tsl2671: 1366 case tsl2771: 1367 return (id & 0xf0) == TRITON_ID; 1368 case tmd2671: 1369 case tmd2771: 1370 return (id & 0xf0) == HALIBUT_ID; 1371 case tsl2572: 1372 case tsl2672: 1373 case tmd2672: 1374 case tsl2772: 1375 case tmd2772: 1376 case apds9930: 1377 return (id & 0xf0) == SWORDFISH_ID; 1378 } 1379 1380 return -EINVAL; 1381} 1382 1383static irqreturn_t tsl2772_event_handler(int irq, void *private) 1384{ 1385 struct iio_dev *indio_dev = private; 1386 struct tsl2772_chip *chip = iio_priv(indio_dev); 1387 s64 timestamp = iio_get_time_ns(indio_dev); 1388 int ret; 1389 1390 ret = tsl2772_read_status(chip); 1391 if (ret < 0) 1392 return IRQ_HANDLED; 1393 1394 /* What type of interrupt do we need to process */ 1395 if (ret & TSL2772_STA_PRX_INTR) { 1396 iio_push_event(indio_dev, 1397 IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 1398 0, 1399 IIO_EV_TYPE_THRESH, 1400 IIO_EV_DIR_EITHER), 1401 timestamp); 1402 } 1403 1404 if (ret & TSL2772_STA_ALS_INTR) { 1405 iio_push_event(indio_dev, 1406 IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 1407 0, 1408 IIO_EV_TYPE_THRESH, 1409 IIO_EV_DIR_EITHER), 1410 timestamp); 1411 } 1412 1413 ret = i2c_smbus_write_byte(chip->client, 1414 TSL2772_CMD_REG | TSL2772_CMD_SPL_FN | 1415 TSL2772_CMD_PROXALS_INT_CLR); 1416 if (ret < 0) 1417 dev_err(&chip->client->dev, 1418 "%s: failed to clear interrupt status: %d\n", 1419 __func__, ret); 1420 1421 return IRQ_HANDLED; 1422} 1423 1424static struct attribute *tsl2772_ALS_device_attrs[] = { 1425 &dev_attr_in_illuminance0_target_input.attr, 1426 &dev_attr_in_illuminance0_calibrate.attr, 1427 &dev_attr_in_illuminance0_lux_table.attr, 1428 NULL 1429}; 1430 1431static struct attribute *tsl2772_PRX_device_attrs[] = { 1432 &dev_attr_in_proximity0_calibrate.attr, 1433 NULL 1434}; 1435 1436static struct attribute *tsl2772_ALSPRX_device_attrs[] = { 1437 &dev_attr_in_illuminance0_target_input.attr, 1438 &dev_attr_in_illuminance0_calibrate.attr, 1439 &dev_attr_in_illuminance0_lux_table.attr, 1440 NULL 1441}; 1442 1443static struct attribute *tsl2772_PRX2_device_attrs[] = { 1444 &dev_attr_in_proximity0_calibrate.attr, 1445 NULL 1446}; 1447 1448static struct attribute *tsl2772_ALSPRX2_device_attrs[] = { 1449 &dev_attr_in_illuminance0_target_input.attr, 1450 &dev_attr_in_illuminance0_calibrate.attr, 1451 &dev_attr_in_illuminance0_lux_table.attr, 1452 &dev_attr_in_proximity0_calibrate.attr, 1453 NULL 1454}; 1455 1456static const struct attribute_group tsl2772_device_attr_group_tbl[] = { 1457 [ALS] = { 1458 .attrs = tsl2772_ALS_device_attrs, 1459 }, 1460 [PRX] = { 1461 .attrs = tsl2772_PRX_device_attrs, 1462 }, 1463 [ALSPRX] = { 1464 .attrs = tsl2772_ALSPRX_device_attrs, 1465 }, 1466 [PRX2] = { 1467 .attrs = tsl2772_PRX2_device_attrs, 1468 }, 1469 [ALSPRX2] = { 1470 .attrs = tsl2772_ALSPRX2_device_attrs, 1471 }, 1472}; 1473 1474#define TSL2772_DEVICE_INFO(type)[type] = \ 1475 { \ 1476 .attrs = &tsl2772_device_attr_group_tbl[type], \ 1477 .read_raw = &tsl2772_read_raw, \ 1478 .read_avail = &tsl2772_read_avail, \ 1479 .write_raw = &tsl2772_write_raw, \ 1480 .read_event_value = &tsl2772_read_event_value, \ 1481 .write_event_value = &tsl2772_write_event_value, \ 1482 .read_event_config = &tsl2772_read_interrupt_config, \ 1483 .write_event_config = &tsl2772_write_interrupt_config, \ 1484 } 1485 1486static const struct iio_info tsl2772_device_info[] = { 1487 TSL2772_DEVICE_INFO(ALS), 1488 TSL2772_DEVICE_INFO(PRX), 1489 TSL2772_DEVICE_INFO(ALSPRX), 1490 TSL2772_DEVICE_INFO(PRX2), 1491 TSL2772_DEVICE_INFO(ALSPRX2), 1492}; 1493 1494static const struct iio_event_spec tsl2772_events[] = { 1495 { 1496 .type = IIO_EV_TYPE_THRESH, 1497 .dir = IIO_EV_DIR_RISING, 1498 .mask_separate = BIT(IIO_EV_INFO_VALUE), 1499 }, { 1500 .type = IIO_EV_TYPE_THRESH, 1501 .dir = IIO_EV_DIR_FALLING, 1502 .mask_separate = BIT(IIO_EV_INFO_VALUE), 1503 }, { 1504 .type = IIO_EV_TYPE_THRESH, 1505 .dir = IIO_EV_DIR_EITHER, 1506 .mask_separate = BIT(IIO_EV_INFO_PERIOD) | 1507 BIT(IIO_EV_INFO_ENABLE), 1508 }, 1509}; 1510 1511static const struct tsl2772_chip_info tsl2772_chip_info_tbl[] = { 1512 [ALS] = { 1513 .channel_with_events = { 1514 { 1515 .type = IIO_LIGHT, 1516 .indexed = 1, 1517 .channel = 0, 1518 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1519 }, { 1520 .type = IIO_INTENSITY, 1521 .indexed = 1, 1522 .channel = 0, 1523 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1524 BIT(IIO_CHAN_INFO_INT_TIME) | 1525 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1526 BIT(IIO_CHAN_INFO_CALIBBIAS), 1527 .info_mask_separate_available = 1528 BIT(IIO_CHAN_INFO_INT_TIME) | 1529 BIT(IIO_CHAN_INFO_CALIBSCALE), 1530 .event_spec = tsl2772_events, 1531 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1532 }, { 1533 .type = IIO_INTENSITY, 1534 .indexed = 1, 1535 .channel = 1, 1536 }, 1537 }, 1538 .channel_without_events = { 1539 { 1540 .type = IIO_LIGHT, 1541 .indexed = 1, 1542 .channel = 0, 1543 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1544 }, { 1545 .type = IIO_INTENSITY, 1546 .indexed = 1, 1547 .channel = 0, 1548 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1549 BIT(IIO_CHAN_INFO_INT_TIME) | 1550 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1551 BIT(IIO_CHAN_INFO_CALIBBIAS), 1552 .info_mask_separate_available = 1553 BIT(IIO_CHAN_INFO_INT_TIME) | 1554 BIT(IIO_CHAN_INFO_CALIBSCALE), 1555 }, { 1556 .type = IIO_INTENSITY, 1557 .indexed = 1, 1558 .channel = 1, 1559 }, 1560 }, 1561 .chan_table_elements = 3, 1562 .info = &tsl2772_device_info[ALS], 1563 }, 1564 [PRX] = { 1565 .channel_with_events = { 1566 { 1567 .type = IIO_PROXIMITY, 1568 .indexed = 1, 1569 .channel = 0, 1570 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1571 .event_spec = tsl2772_events, 1572 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1573 }, 1574 }, 1575 .channel_without_events = { 1576 { 1577 .type = IIO_PROXIMITY, 1578 .indexed = 1, 1579 .channel = 0, 1580 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1581 }, 1582 }, 1583 .chan_table_elements = 1, 1584 .info = &tsl2772_device_info[PRX], 1585 }, 1586 [ALSPRX] = { 1587 .channel_with_events = { 1588 { 1589 .type = IIO_LIGHT, 1590 .indexed = 1, 1591 .channel = 0, 1592 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1593 }, { 1594 .type = IIO_INTENSITY, 1595 .indexed = 1, 1596 .channel = 0, 1597 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1598 BIT(IIO_CHAN_INFO_INT_TIME) | 1599 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1600 BIT(IIO_CHAN_INFO_CALIBBIAS), 1601 .info_mask_separate_available = 1602 BIT(IIO_CHAN_INFO_INT_TIME) | 1603 BIT(IIO_CHAN_INFO_CALIBSCALE), 1604 .event_spec = tsl2772_events, 1605 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1606 }, { 1607 .type = IIO_INTENSITY, 1608 .indexed = 1, 1609 .channel = 1, 1610 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1611 }, { 1612 .type = IIO_PROXIMITY, 1613 .indexed = 1, 1614 .channel = 0, 1615 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1616 .event_spec = tsl2772_events, 1617 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1618 }, 1619 }, 1620 .channel_without_events = { 1621 { 1622 .type = IIO_LIGHT, 1623 .indexed = 1, 1624 .channel = 0, 1625 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1626 }, { 1627 .type = IIO_INTENSITY, 1628 .indexed = 1, 1629 .channel = 0, 1630 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1631 BIT(IIO_CHAN_INFO_INT_TIME) | 1632 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1633 BIT(IIO_CHAN_INFO_CALIBBIAS), 1634 .info_mask_separate_available = 1635 BIT(IIO_CHAN_INFO_INT_TIME) | 1636 BIT(IIO_CHAN_INFO_CALIBSCALE), 1637 }, { 1638 .type = IIO_INTENSITY, 1639 .indexed = 1, 1640 .channel = 1, 1641 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1642 }, { 1643 .type = IIO_PROXIMITY, 1644 .indexed = 1, 1645 .channel = 0, 1646 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1647 }, 1648 }, 1649 .chan_table_elements = 4, 1650 .info = &tsl2772_device_info[ALSPRX], 1651 }, 1652 [PRX2] = { 1653 .channel_with_events = { 1654 { 1655 .type = IIO_PROXIMITY, 1656 .indexed = 1, 1657 .channel = 0, 1658 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1659 BIT(IIO_CHAN_INFO_CALIBSCALE), 1660 .info_mask_separate_available = 1661 BIT(IIO_CHAN_INFO_CALIBSCALE), 1662 .event_spec = tsl2772_events, 1663 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1664 }, 1665 }, 1666 .channel_without_events = { 1667 { 1668 .type = IIO_PROXIMITY, 1669 .indexed = 1, 1670 .channel = 0, 1671 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1672 BIT(IIO_CHAN_INFO_CALIBSCALE), 1673 .info_mask_separate_available = 1674 BIT(IIO_CHAN_INFO_CALIBSCALE), 1675 }, 1676 }, 1677 .chan_table_elements = 1, 1678 .info = &tsl2772_device_info[PRX2], 1679 }, 1680 [ALSPRX2] = { 1681 .channel_with_events = { 1682 { 1683 .type = IIO_LIGHT, 1684 .indexed = 1, 1685 .channel = 0, 1686 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1687 }, { 1688 .type = IIO_INTENSITY, 1689 .indexed = 1, 1690 .channel = 0, 1691 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1692 BIT(IIO_CHAN_INFO_INT_TIME) | 1693 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1694 BIT(IIO_CHAN_INFO_CALIBBIAS), 1695 .info_mask_separate_available = 1696 BIT(IIO_CHAN_INFO_INT_TIME) | 1697 BIT(IIO_CHAN_INFO_CALIBSCALE), 1698 .event_spec = tsl2772_events, 1699 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1700 }, { 1701 .type = IIO_INTENSITY, 1702 .indexed = 1, 1703 .channel = 1, 1704 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1705 }, { 1706 .type = IIO_PROXIMITY, 1707 .indexed = 1, 1708 .channel = 0, 1709 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1710 BIT(IIO_CHAN_INFO_CALIBSCALE), 1711 .info_mask_separate_available = 1712 BIT(IIO_CHAN_INFO_CALIBSCALE), 1713 .event_spec = tsl2772_events, 1714 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1715 }, 1716 }, 1717 .channel_without_events = { 1718 { 1719 .type = IIO_LIGHT, 1720 .indexed = 1, 1721 .channel = 0, 1722 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1723 }, { 1724 .type = IIO_INTENSITY, 1725 .indexed = 1, 1726 .channel = 0, 1727 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1728 BIT(IIO_CHAN_INFO_INT_TIME) | 1729 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1730 BIT(IIO_CHAN_INFO_CALIBBIAS), 1731 .info_mask_separate_available = 1732 BIT(IIO_CHAN_INFO_INT_TIME) | 1733 BIT(IIO_CHAN_INFO_CALIBSCALE), 1734 }, { 1735 .type = IIO_INTENSITY, 1736 .indexed = 1, 1737 .channel = 1, 1738 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1739 }, { 1740 .type = IIO_PROXIMITY, 1741 .indexed = 1, 1742 .channel = 0, 1743 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1744 BIT(IIO_CHAN_INFO_CALIBSCALE), 1745 .info_mask_separate_available = 1746 BIT(IIO_CHAN_INFO_CALIBSCALE), 1747 }, 1748 }, 1749 .chan_table_elements = 4, 1750 .info = &tsl2772_device_info[ALSPRX2], 1751 }, 1752}; 1753 1754static int tsl2772_probe(struct i2c_client *clientp) 1755{ 1756 const struct i2c_device_id *id = i2c_client_get_device_id(clientp); 1757 struct iio_dev *indio_dev; 1758 struct tsl2772_chip *chip; 1759 int ret; 1760 1761 indio_dev = devm_iio_device_alloc(&clientp->dev, sizeof(*chip)); 1762 if (!indio_dev) 1763 return -ENOMEM; 1764 1765 chip = iio_priv(indio_dev); 1766 chip->client = clientp; 1767 i2c_set_clientdata(clientp, indio_dev); 1768 1769 chip->supplies[TSL2772_SUPPLY_VDD].supply = "vdd"; 1770 chip->supplies[TSL2772_SUPPLY_VDDIO].supply = "vddio"; 1771 1772 ret = devm_regulator_bulk_get(&clientp->dev, 1773 ARRAY_SIZE(chip->supplies), 1774 chip->supplies); 1775 if (ret < 0) 1776 return dev_err_probe(&clientp->dev, ret, "Failed to get regulators\n"); 1777 1778 ret = regulator_bulk_enable(ARRAY_SIZE(chip->supplies), chip->supplies); 1779 if (ret < 0) { 1780 dev_err(&clientp->dev, "Failed to enable regulators: %d\n", 1781 ret); 1782 return ret; 1783 } 1784 1785 ret = devm_add_action_or_reset(&clientp->dev, 1786 tsl2772_disable_regulators_action, 1787 chip); 1788 if (ret < 0) { 1789 dev_err(&clientp->dev, "Failed to setup regulator cleanup action %d\n", 1790 ret); 1791 return ret; 1792 } 1793 1794 usleep_range(TSL2772_BOOT_MIN_SLEEP_TIME, TSL2772_BOOT_MAX_SLEEP_TIME); 1795 1796 ret = i2c_smbus_read_byte_data(chip->client, 1797 TSL2772_CMD_REG | TSL2772_CHIPID); 1798 if (ret < 0) 1799 return ret; 1800 1801 if (tsl2772_device_id_verif(ret, id->driver_data) <= 0) { 1802 dev_info(&chip->client->dev, 1803 "%s: i2c device found does not match expected id\n", 1804 __func__); 1805 return -EINVAL; 1806 } 1807 1808 ret = i2c_smbus_write_byte(clientp, TSL2772_CMD_REG | TSL2772_CNTRL); 1809 if (ret < 0) { 1810 dev_err(&clientp->dev, 1811 "%s: Failed to write to CMD register: %d\n", 1812 __func__, ret); 1813 return ret; 1814 } 1815 1816 mutex_init(&chip->als_mutex); 1817 mutex_init(&chip->prox_mutex); 1818 1819 chip->tsl2772_chip_status = TSL2772_CHIP_UNKNOWN; 1820 chip->pdata = dev_get_platdata(&clientp->dev); 1821 chip->id = id->driver_data; 1822 chip->chip_info = 1823 &tsl2772_chip_info_tbl[device_channel_config[id->driver_data]]; 1824 1825 indio_dev->info = chip->chip_info->info; 1826 indio_dev->modes = INDIO_DIRECT_MODE; 1827 indio_dev->name = chip->client->name; 1828 indio_dev->num_channels = chip->chip_info->chan_table_elements; 1829 1830 if (clientp->irq) { 1831 indio_dev->channels = chip->chip_info->channel_with_events; 1832 1833 ret = devm_request_threaded_irq(&clientp->dev, clientp->irq, 1834 NULL, 1835 &tsl2772_event_handler, 1836 IRQF_TRIGGER_FALLING | 1837 IRQF_ONESHOT, 1838 "TSL2772_event", 1839 indio_dev); 1840 if (ret) { 1841 dev_err(&clientp->dev, 1842 "%s: irq request failed\n", __func__); 1843 return ret; 1844 } 1845 } else { 1846 indio_dev->channels = chip->chip_info->channel_without_events; 1847 } 1848 1849 tsl2772_defaults(chip); 1850 ret = tsl2772_chip_on(indio_dev); 1851 if (ret < 0) 1852 return ret; 1853 1854 ret = devm_add_action_or_reset(&clientp->dev, 1855 tsl2772_chip_off_action, 1856 indio_dev); 1857 if (ret < 0) 1858 return ret; 1859 1860 return devm_iio_device_register(&clientp->dev, indio_dev); 1861} 1862 1863static int tsl2772_suspend(struct device *dev) 1864{ 1865 struct iio_dev *indio_dev = dev_get_drvdata(dev); 1866 struct tsl2772_chip *chip = iio_priv(indio_dev); 1867 int ret; 1868 1869 ret = tsl2772_chip_off(indio_dev); 1870 regulator_bulk_disable(ARRAY_SIZE(chip->supplies), chip->supplies); 1871 1872 return ret; 1873} 1874 1875static int tsl2772_resume(struct device *dev) 1876{ 1877 struct iio_dev *indio_dev = dev_get_drvdata(dev); 1878 struct tsl2772_chip *chip = iio_priv(indio_dev); 1879 int ret; 1880 1881 ret = regulator_bulk_enable(ARRAY_SIZE(chip->supplies), chip->supplies); 1882 if (ret < 0) 1883 return ret; 1884 1885 usleep_range(TSL2772_BOOT_MIN_SLEEP_TIME, TSL2772_BOOT_MAX_SLEEP_TIME); 1886 1887 return tsl2772_chip_on(indio_dev); 1888} 1889 1890static const struct i2c_device_id tsl2772_idtable[] = { 1891 { "tsl2571", tsl2571 }, 1892 { "tsl2671", tsl2671 }, 1893 { "tmd2671", tmd2671 }, 1894 { "tsl2771", tsl2771 }, 1895 { "tmd2771", tmd2771 }, 1896 { "tsl2572", tsl2572 }, 1897 { "tsl2672", tsl2672 }, 1898 { "tmd2672", tmd2672 }, 1899 { "tsl2772", tsl2772 }, 1900 { "tmd2772", tmd2772 }, 1901 { "apds9930", apds9930 }, 1902 {} 1903}; 1904 1905MODULE_DEVICE_TABLE(i2c, tsl2772_idtable); 1906 1907static const struct of_device_id tsl2772_of_match[] = { 1908 { .compatible = "amstaos,tsl2571" }, 1909 { .compatible = "amstaos,tsl2671" }, 1910 { .compatible = "amstaos,tmd2671" }, 1911 { .compatible = "amstaos,tsl2771" }, 1912 { .compatible = "amstaos,tmd2771" }, 1913 { .compatible = "amstaos,tsl2572" }, 1914 { .compatible = "amstaos,tsl2672" }, 1915 { .compatible = "amstaos,tmd2672" }, 1916 { .compatible = "amstaos,tsl2772" }, 1917 { .compatible = "amstaos,tmd2772" }, 1918 { .compatible = "avago,apds9930" }, 1919 {} 1920}; 1921MODULE_DEVICE_TABLE(of, tsl2772_of_match); 1922 1923static const struct dev_pm_ops tsl2772_pm_ops = { 1924 .suspend = tsl2772_suspend, 1925 .resume = tsl2772_resume, 1926}; 1927 1928static struct i2c_driver tsl2772_driver = { 1929 .driver = { 1930 .name = "tsl2772", 1931 .of_match_table = tsl2772_of_match, 1932 .pm = &tsl2772_pm_ops, 1933 }, 1934 .id_table = tsl2772_idtable, 1935 .probe = tsl2772_probe, 1936}; 1937 1938module_i2c_driver(tsl2772_driver); 1939 1940MODULE_AUTHOR("J. August Brenner <Jon.Brenner@ams.com>"); 1941MODULE_AUTHOR("Brian Masney <masneyb@onstation.org>"); 1942MODULE_DESCRIPTION("TAOS tsl2772 ambient and proximity light sensor driver"); 1943MODULE_LICENSE("GPL"); 1944