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/slab.h> 19 #include <linux/iio/events.h> 20 #include <linux/iio/iio.h> 21 #include <linux/iio/sysfs.h> 22 #include <linux/platform_data/tsl2772.h> 23 24 /* Cal defs */ 25 #define PROX_STAT_CAL 0 26 #define PROX_STAT_SAMP 1 27 #define MAX_SAMPLES_CAL 200 28 29 /* TSL2772 Device ID */ 30 #define TRITON_ID 0x00 31 #define SWORDFISH_ID 0x30 32 #define HALIBUT_ID 0x20 33 34 /* Lux calculation constants */ 35 #define TSL2772_LUX_CALC_OVER_FLOW 65535 36 37 /* 38 * TAOS Register definitions - Note: depending on device, some of these register 39 * are not used and the register address is benign. 40 */ 41 42 /* Register offsets */ 43 #define TSL2772_MAX_CONFIG_REG 16 44 45 /* Device Registers and Masks */ 46 #define TSL2772_CNTRL 0x00 47 #define TSL2772_ALS_TIME 0X01 48 #define TSL2772_PRX_TIME 0x02 49 #define TSL2772_WAIT_TIME 0x03 50 #define TSL2772_ALS_MINTHRESHLO 0X04 51 #define TSL2772_ALS_MINTHRESHHI 0X05 52 #define TSL2772_ALS_MAXTHRESHLO 0X06 53 #define TSL2772_ALS_MAXTHRESHHI 0X07 54 #define TSL2772_PRX_MINTHRESHLO 0X08 55 #define TSL2772_PRX_MINTHRESHHI 0X09 56 #define TSL2772_PRX_MAXTHRESHLO 0X0A 57 #define TSL2772_PRX_MAXTHRESHHI 0X0B 58 #define TSL2772_PERSISTENCE 0x0C 59 #define TSL2772_ALS_PRX_CONFIG 0x0D 60 #define TSL2772_PRX_COUNT 0x0E 61 #define TSL2772_GAIN 0x0F 62 #define TSL2772_NOTUSED 0x10 63 #define TSL2772_REVID 0x11 64 #define TSL2772_CHIPID 0x12 65 #define TSL2772_STATUS 0x13 66 #define TSL2772_ALS_CHAN0LO 0x14 67 #define TSL2772_ALS_CHAN0HI 0x15 68 #define TSL2772_ALS_CHAN1LO 0x16 69 #define TSL2772_ALS_CHAN1HI 0x17 70 #define TSL2772_PRX_LO 0x18 71 #define TSL2772_PRX_HI 0x19 72 73 /* tsl2772 cmd reg masks */ 74 #define TSL2772_CMD_REG 0x80 75 #define TSL2772_CMD_SPL_FN 0x60 76 #define TSL2772_CMD_REPEAT_PROTO 0x00 77 #define TSL2772_CMD_AUTOINC_PROTO 0x20 78 79 #define TSL2772_CMD_PROX_INT_CLR 0X05 80 #define TSL2772_CMD_ALS_INT_CLR 0x06 81 #define TSL2772_CMD_PROXALS_INT_CLR 0X07 82 83 /* tsl2772 cntrl reg masks */ 84 #define TSL2772_CNTL_ADC_ENBL 0x02 85 #define TSL2772_CNTL_PWR_ON 0x01 86 87 /* tsl2772 status reg masks */ 88 #define TSL2772_STA_ADC_VALID 0x01 89 #define TSL2772_STA_PRX_VALID 0x02 90 #define TSL2772_STA_ADC_PRX_VALID (TSL2772_STA_ADC_VALID | \ 91 TSL2772_STA_PRX_VALID) 92 #define TSL2772_STA_ALS_INTR 0x10 93 #define TSL2772_STA_PRX_INTR 0x20 94 95 /* tsl2772 cntrl reg masks */ 96 #define TSL2772_CNTL_REG_CLEAR 0x00 97 #define TSL2772_CNTL_PROX_INT_ENBL 0X20 98 #define TSL2772_CNTL_ALS_INT_ENBL 0X10 99 #define TSL2772_CNTL_WAIT_TMR_ENBL 0X08 100 #define TSL2772_CNTL_PROX_DET_ENBL 0X04 101 #define TSL2772_CNTL_PWRON 0x01 102 #define TSL2772_CNTL_ALSPON_ENBL 0x03 103 #define TSL2772_CNTL_INTALSPON_ENBL 0x13 104 #define TSL2772_CNTL_PROXPON_ENBL 0x0F 105 #define TSL2772_CNTL_INTPROXPON_ENBL 0x2F 106 107 #define TSL2772_ALS_GAIN_TRIM_MIN 250 108 #define TSL2772_ALS_GAIN_TRIM_MAX 4000 109 110 /* Device family members */ 111 enum { 112 tsl2571, 113 tsl2671, 114 tmd2671, 115 tsl2771, 116 tmd2771, 117 tsl2572, 118 tsl2672, 119 tmd2672, 120 tsl2772, 121 tmd2772 122 }; 123 124 enum { 125 TSL2772_CHIP_UNKNOWN = 0, 126 TSL2772_CHIP_WORKING = 1, 127 TSL2772_CHIP_SUSPENDED = 2 128 }; 129 130 /* Per-device data */ 131 struct tsl2772_als_info { 132 u16 als_ch0; 133 u16 als_ch1; 134 u16 lux; 135 }; 136 137 struct tsl2772_chip_info { 138 int chan_table_elements; 139 struct iio_chan_spec channel_with_events[4]; 140 struct iio_chan_spec channel_without_events[4]; 141 const struct iio_info *info; 142 }; 143 144 struct tsl2772_chip { 145 kernel_ulong_t id; 146 struct mutex prox_mutex; 147 struct mutex als_mutex; 148 struct i2c_client *client; 149 u16 prox_data; 150 struct tsl2772_als_info als_cur_info; 151 struct tsl2772_settings settings; 152 struct tsl2772_platform_data *pdata; 153 int als_gain_time_scale; 154 int als_saturation; 155 int tsl2772_chip_status; 156 u8 tsl2772_config[TSL2772_MAX_CONFIG_REG]; 157 const struct tsl2772_chip_info *chip_info; 158 const struct iio_info *info; 159 s64 event_timestamp; 160 /* 161 * This structure is intentionally large to accommodate 162 * updates via sysfs. 163 * Sized to 9 = max 8 segments + 1 termination segment 164 */ 165 struct tsl2772_lux tsl2772_device_lux[TSL2772_MAX_LUX_TABLE_SIZE]; 166 }; 167 168 /* 169 * Different devices require different coefficents, and these numbers were 170 * derived from the 'Lux Equation' section of the various device datasheets. 171 * All of these coefficients assume a Glass Attenuation (GA) factor of 1. 172 * The coefficients are multiplied by 1000 to avoid floating point operations. 173 * The two rows in each table correspond to the Lux1 and Lux2 equations from 174 * the datasheets. 175 */ 176 static const struct tsl2772_lux tsl2x71_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = { 177 { 53000, 106000 }, 178 { 31800, 53000 }, 179 { 0, 0 }, 180 }; 181 182 static const struct tsl2772_lux tmd2x71_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = { 183 { 24000, 48000 }, 184 { 14400, 24000 }, 185 { 0, 0 }, 186 }; 187 188 static const struct tsl2772_lux tsl2x72_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = { 189 { 60000, 112200 }, 190 { 37800, 60000 }, 191 { 0, 0 }, 192 }; 193 194 static const struct tsl2772_lux tmd2x72_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = { 195 { 20000, 35000 }, 196 { 12600, 20000 }, 197 { 0, 0 }, 198 }; 199 200 static const struct tsl2772_lux *tsl2772_default_lux_table_group[] = { 201 [tsl2571] = tsl2x71_lux_table, 202 [tsl2671] = tsl2x71_lux_table, 203 [tmd2671] = tmd2x71_lux_table, 204 [tsl2771] = tsl2x71_lux_table, 205 [tmd2771] = tmd2x71_lux_table, 206 [tsl2572] = tsl2x72_lux_table, 207 [tsl2672] = tsl2x72_lux_table, 208 [tmd2672] = tmd2x72_lux_table, 209 [tsl2772] = tsl2x72_lux_table, 210 [tmd2772] = tmd2x72_lux_table, 211 }; 212 213 static const struct tsl2772_settings tsl2772_default_settings = { 214 .als_time = 255, /* 2.72 / 2.73 ms */ 215 .als_gain = 0, 216 .prox_time = 255, /* 2.72 / 2.73 ms */ 217 .prox_gain = 0, 218 .wait_time = 255, 219 .als_prox_config = 0, 220 .als_gain_trim = 1000, 221 .als_cal_target = 150, 222 .als_persistence = 1, 223 .als_interrupt_en = false, 224 .als_thresh_low = 200, 225 .als_thresh_high = 256, 226 .prox_persistence = 1, 227 .prox_interrupt_en = false, 228 .prox_thres_low = 0, 229 .prox_thres_high = 512, 230 .prox_max_samples_cal = 30, 231 .prox_pulse_count = 8, 232 .prox_diode = TSL2772_DIODE1, 233 .prox_power = TSL2772_100_mA 234 }; 235 236 static const s16 tsl2772_als_gain[] = { 237 1, 238 8, 239 16, 240 120 241 }; 242 243 static const s16 tsl2772_prox_gain[] = { 244 1, 245 2, 246 4, 247 8 248 }; 249 250 static const int tsl2772_int_time_avail[][6] = { 251 [tsl2571] = { 0, 2720, 0, 2720, 0, 696000 }, 252 [tsl2671] = { 0, 2720, 0, 2720, 0, 696000 }, 253 [tmd2671] = { 0, 2720, 0, 2720, 0, 696000 }, 254 [tsl2771] = { 0, 2720, 0, 2720, 0, 696000 }, 255 [tmd2771] = { 0, 2720, 0, 2720, 0, 696000 }, 256 [tsl2572] = { 0, 2730, 0, 2730, 0, 699000 }, 257 [tsl2672] = { 0, 2730, 0, 2730, 0, 699000 }, 258 [tmd2672] = { 0, 2730, 0, 2730, 0, 699000 }, 259 [tsl2772] = { 0, 2730, 0, 2730, 0, 699000 }, 260 [tmd2772] = { 0, 2730, 0, 2730, 0, 699000 }, 261 }; 262 263 static int tsl2772_int_calibscale_avail[] = { 1, 8, 16, 120 }; 264 265 static int tsl2772_prox_calibscale_avail[] = { 1, 2, 4, 8 }; 266 267 /* Channel variations */ 268 enum { 269 ALS, 270 PRX, 271 ALSPRX, 272 PRX2, 273 ALSPRX2, 274 }; 275 276 static const u8 device_channel_config[] = { 277 [tsl2571] = ALS, 278 [tsl2671] = PRX, 279 [tmd2671] = PRX, 280 [tsl2771] = ALSPRX, 281 [tmd2771] = ALSPRX, 282 [tsl2572] = ALS, 283 [tsl2672] = PRX2, 284 [tmd2672] = PRX2, 285 [tsl2772] = ALSPRX2, 286 [tmd2772] = ALSPRX2 287 }; 288 289 static int tsl2772_read_status(struct tsl2772_chip *chip) 290 { 291 int ret; 292 293 ret = i2c_smbus_read_byte_data(chip->client, 294 TSL2772_CMD_REG | TSL2772_STATUS); 295 if (ret < 0) 296 dev_err(&chip->client->dev, 297 "%s: failed to read STATUS register: %d\n", __func__, 298 ret); 299 300 return ret; 301 } 302 303 static int tsl2772_write_control_reg(struct tsl2772_chip *chip, u8 data) 304 { 305 int ret; 306 307 ret = i2c_smbus_write_byte_data(chip->client, 308 TSL2772_CMD_REG | TSL2772_CNTRL, data); 309 if (ret < 0) { 310 dev_err(&chip->client->dev, 311 "%s: failed to write to control register %x: %d\n", 312 __func__, data, ret); 313 } 314 315 return ret; 316 } 317 318 static int tsl2772_read_autoinc_regs(struct tsl2772_chip *chip, int lower_reg, 319 int upper_reg) 320 { 321 u8 buf[2]; 322 int ret; 323 324 ret = i2c_smbus_write_byte(chip->client, 325 TSL2772_CMD_REG | TSL2772_CMD_AUTOINC_PROTO | 326 lower_reg); 327 if (ret < 0) { 328 dev_err(&chip->client->dev, 329 "%s: failed to enable auto increment protocol: %d\n", 330 __func__, ret); 331 return ret; 332 } 333 334 ret = i2c_smbus_read_byte_data(chip->client, 335 TSL2772_CMD_REG | lower_reg); 336 if (ret < 0) { 337 dev_err(&chip->client->dev, 338 "%s: failed to read from register %x: %d\n", __func__, 339 lower_reg, ret); 340 return ret; 341 } 342 buf[0] = ret; 343 344 ret = i2c_smbus_read_byte_data(chip->client, 345 TSL2772_CMD_REG | upper_reg); 346 if (ret < 0) { 347 dev_err(&chip->client->dev, 348 "%s: failed to read from register %x: %d\n", __func__, 349 upper_reg, ret); 350 return ret; 351 } 352 buf[1] = ret; 353 354 ret = i2c_smbus_write_byte(chip->client, 355 TSL2772_CMD_REG | TSL2772_CMD_REPEAT_PROTO | 356 lower_reg); 357 if (ret < 0) { 358 dev_err(&chip->client->dev, 359 "%s: failed to enable repeated byte protocol: %d\n", 360 __func__, ret); 361 return ret; 362 } 363 364 return le16_to_cpup((const __le16 *)&buf[0]); 365 } 366 367 /** 368 * tsl2772_get_lux() - Reads and calculates current lux value. 369 * @indio_dev: pointer to IIO device 370 * 371 * The raw ch0 and ch1 values of the ambient light sensed in the last 372 * integration cycle are read from the device. The raw values are multiplied 373 * by a device-specific scale factor, and divided by the integration time and 374 * device gain. The code supports multiple lux equations through the lux table 375 * coefficients. A lux gain trim is applied to each lux equation, and then the 376 * maximum lux within the interval 0..65535 is selected. 377 */ 378 static int tsl2772_get_lux(struct iio_dev *indio_dev) 379 { 380 struct tsl2772_chip *chip = iio_priv(indio_dev); 381 struct tsl2772_lux *p; 382 int max_lux, ret; 383 bool overflow; 384 385 mutex_lock(&chip->als_mutex); 386 387 if (chip->tsl2772_chip_status != TSL2772_CHIP_WORKING) { 388 dev_err(&chip->client->dev, "%s: device is not enabled\n", 389 __func__); 390 ret = -EBUSY; 391 goto out_unlock; 392 } 393 394 ret = tsl2772_read_status(chip); 395 if (ret < 0) 396 goto out_unlock; 397 398 if (!(ret & TSL2772_STA_ADC_VALID)) { 399 dev_err(&chip->client->dev, 400 "%s: data not valid yet\n", __func__); 401 ret = chip->als_cur_info.lux; /* return LAST VALUE */ 402 goto out_unlock; 403 } 404 405 ret = tsl2772_read_autoinc_regs(chip, TSL2772_ALS_CHAN0LO, 406 TSL2772_ALS_CHAN0HI); 407 if (ret < 0) 408 goto out_unlock; 409 chip->als_cur_info.als_ch0 = ret; 410 411 ret = tsl2772_read_autoinc_regs(chip, TSL2772_ALS_CHAN1LO, 412 TSL2772_ALS_CHAN1HI); 413 if (ret < 0) 414 goto out_unlock; 415 chip->als_cur_info.als_ch1 = ret; 416 417 if (chip->als_cur_info.als_ch0 >= chip->als_saturation) { 418 max_lux = TSL2772_LUX_CALC_OVER_FLOW; 419 goto update_struct_with_max_lux; 420 } 421 422 if (!chip->als_cur_info.als_ch0) { 423 /* have no data, so return LAST VALUE */ 424 ret = chip->als_cur_info.lux; 425 goto out_unlock; 426 } 427 428 max_lux = 0; 429 overflow = false; 430 for (p = (struct tsl2772_lux *)chip->tsl2772_device_lux; p->ch0 != 0; 431 p++) { 432 int lux; 433 434 lux = ((chip->als_cur_info.als_ch0 * p->ch0) - 435 (chip->als_cur_info.als_ch1 * p->ch1)) / 436 chip->als_gain_time_scale; 437 438 /* 439 * The als_gain_trim can have a value within the range 250..4000 440 * and is a multiplier for the lux. A trim of 1000 makes no 441 * changes to the lux, less than 1000 scales it down, and 442 * greater than 1000 scales it up. 443 */ 444 lux = (lux * chip->settings.als_gain_trim) / 1000; 445 446 if (lux > TSL2772_LUX_CALC_OVER_FLOW) { 447 overflow = true; 448 continue; 449 } 450 451 max_lux = max(max_lux, lux); 452 } 453 454 if (overflow && max_lux == 0) 455 max_lux = TSL2772_LUX_CALC_OVER_FLOW; 456 457 update_struct_with_max_lux: 458 chip->als_cur_info.lux = max_lux; 459 ret = max_lux; 460 461 out_unlock: 462 mutex_unlock(&chip->als_mutex); 463 464 return ret; 465 } 466 467 /** 468 * tsl2772_get_prox() - Reads proximity data registers and updates 469 * chip->prox_data. 470 * 471 * @indio_dev: pointer to IIO device 472 */ 473 static int tsl2772_get_prox(struct iio_dev *indio_dev) 474 { 475 struct tsl2772_chip *chip = iio_priv(indio_dev); 476 int ret; 477 478 mutex_lock(&chip->prox_mutex); 479 480 ret = tsl2772_read_status(chip); 481 if (ret < 0) 482 goto prox_poll_err; 483 484 switch (chip->id) { 485 case tsl2571: 486 case tsl2671: 487 case tmd2671: 488 case tsl2771: 489 case tmd2771: 490 if (!(ret & TSL2772_STA_ADC_VALID)) { 491 ret = -EINVAL; 492 goto prox_poll_err; 493 } 494 break; 495 case tsl2572: 496 case tsl2672: 497 case tmd2672: 498 case tsl2772: 499 case tmd2772: 500 if (!(ret & TSL2772_STA_PRX_VALID)) { 501 ret = -EINVAL; 502 goto prox_poll_err; 503 } 504 break; 505 } 506 507 ret = tsl2772_read_autoinc_regs(chip, TSL2772_PRX_LO, TSL2772_PRX_HI); 508 if (ret < 0) 509 goto prox_poll_err; 510 chip->prox_data = ret; 511 512 prox_poll_err: 513 mutex_unlock(&chip->prox_mutex); 514 515 return ret; 516 } 517 518 /** 519 * tsl2772_defaults() - Populates the device nominal operating parameters 520 * with those provided by a 'platform' data struct or 521 * with prefined defaults. 522 * 523 * @chip: pointer to device structure. 524 */ 525 static void tsl2772_defaults(struct tsl2772_chip *chip) 526 { 527 /* If Operational settings defined elsewhere.. */ 528 if (chip->pdata && chip->pdata->platform_default_settings) 529 memcpy(&chip->settings, chip->pdata->platform_default_settings, 530 sizeof(tsl2772_default_settings)); 531 else 532 memcpy(&chip->settings, &tsl2772_default_settings, 533 sizeof(tsl2772_default_settings)); 534 535 /* Load up the proper lux table. */ 536 if (chip->pdata && chip->pdata->platform_lux_table[0].ch0 != 0) 537 memcpy(chip->tsl2772_device_lux, 538 chip->pdata->platform_lux_table, 539 sizeof(chip->pdata->platform_lux_table)); 540 else 541 memcpy(chip->tsl2772_device_lux, 542 tsl2772_default_lux_table_group[chip->id], 543 TSL2772_DEFAULT_TABLE_BYTES); 544 } 545 546 /** 547 * tsl2772_als_calibrate() - Obtain single reading and calculate 548 * the als_gain_trim. 549 * 550 * @indio_dev: pointer to IIO device 551 */ 552 static int tsl2772_als_calibrate(struct iio_dev *indio_dev) 553 { 554 struct tsl2772_chip *chip = iio_priv(indio_dev); 555 int ret, lux_val; 556 557 ret = i2c_smbus_read_byte_data(chip->client, 558 TSL2772_CMD_REG | TSL2772_CNTRL); 559 if (ret < 0) { 560 dev_err(&chip->client->dev, 561 "%s: failed to read from the CNTRL register\n", 562 __func__); 563 return ret; 564 } 565 566 if ((ret & (TSL2772_CNTL_ADC_ENBL | TSL2772_CNTL_PWR_ON)) 567 != (TSL2772_CNTL_ADC_ENBL | TSL2772_CNTL_PWR_ON)) { 568 dev_err(&chip->client->dev, 569 "%s: Device is not powered on and/or ADC is not enabled\n", 570 __func__); 571 return -EINVAL; 572 } else if ((ret & TSL2772_STA_ADC_VALID) != TSL2772_STA_ADC_VALID) { 573 dev_err(&chip->client->dev, 574 "%s: The two ADC channels have not completed an integration cycle\n", 575 __func__); 576 return -ENODATA; 577 } 578 579 lux_val = tsl2772_get_lux(indio_dev); 580 if (lux_val < 0) { 581 dev_err(&chip->client->dev, 582 "%s: failed to get lux\n", __func__); 583 return lux_val; 584 } 585 if (lux_val == 0) 586 return -ERANGE; 587 588 ret = (chip->settings.als_cal_target * chip->settings.als_gain_trim) / 589 lux_val; 590 if (ret < TSL2772_ALS_GAIN_TRIM_MIN || ret > TSL2772_ALS_GAIN_TRIM_MAX) 591 return -ERANGE; 592 593 chip->settings.als_gain_trim = ret; 594 595 return ret; 596 } 597 598 static int tsl2772_chip_on(struct iio_dev *indio_dev) 599 { 600 struct tsl2772_chip *chip = iio_priv(indio_dev); 601 int ret, i, als_count, als_time_us; 602 u8 *dev_reg, reg_val; 603 604 /* Non calculated parameters */ 605 chip->tsl2772_config[TSL2772_ALS_TIME] = chip->settings.als_time; 606 chip->tsl2772_config[TSL2772_PRX_TIME] = chip->settings.prox_time; 607 chip->tsl2772_config[TSL2772_WAIT_TIME] = chip->settings.wait_time; 608 chip->tsl2772_config[TSL2772_ALS_PRX_CONFIG] = 609 chip->settings.als_prox_config; 610 611 chip->tsl2772_config[TSL2772_ALS_MINTHRESHLO] = 612 (chip->settings.als_thresh_low) & 0xFF; 613 chip->tsl2772_config[TSL2772_ALS_MINTHRESHHI] = 614 (chip->settings.als_thresh_low >> 8) & 0xFF; 615 chip->tsl2772_config[TSL2772_ALS_MAXTHRESHLO] = 616 (chip->settings.als_thresh_high) & 0xFF; 617 chip->tsl2772_config[TSL2772_ALS_MAXTHRESHHI] = 618 (chip->settings.als_thresh_high >> 8) & 0xFF; 619 chip->tsl2772_config[TSL2772_PERSISTENCE] = 620 (chip->settings.prox_persistence & 0xFF) << 4 | 621 (chip->settings.als_persistence & 0xFF); 622 623 chip->tsl2772_config[TSL2772_PRX_COUNT] = 624 chip->settings.prox_pulse_count; 625 chip->tsl2772_config[TSL2772_PRX_MINTHRESHLO] = 626 (chip->settings.prox_thres_low) & 0xFF; 627 chip->tsl2772_config[TSL2772_PRX_MINTHRESHHI] = 628 (chip->settings.prox_thres_low >> 8) & 0xFF; 629 chip->tsl2772_config[TSL2772_PRX_MAXTHRESHLO] = 630 (chip->settings.prox_thres_high) & 0xFF; 631 chip->tsl2772_config[TSL2772_PRX_MAXTHRESHHI] = 632 (chip->settings.prox_thres_high >> 8) & 0xFF; 633 634 /* and make sure we're not already on */ 635 if (chip->tsl2772_chip_status == TSL2772_CHIP_WORKING) { 636 /* if forcing a register update - turn off, then on */ 637 dev_info(&chip->client->dev, "device is already enabled\n"); 638 return -EINVAL; 639 } 640 641 /* Set the gain based on tsl2772_settings struct */ 642 chip->tsl2772_config[TSL2772_GAIN] = 643 (chip->settings.als_gain & 0xFF) | 644 ((chip->settings.prox_gain & 0xFF) << 2) | 645 (chip->settings.prox_diode << 4) | 646 (chip->settings.prox_power << 6); 647 648 /* set chip time scaling and saturation */ 649 als_count = 256 - chip->settings.als_time; 650 als_time_us = als_count * tsl2772_int_time_avail[chip->id][3]; 651 chip->als_saturation = als_count * 768; /* 75% of full scale */ 652 chip->als_gain_time_scale = als_time_us * 653 tsl2772_als_gain[chip->settings.als_gain]; 654 655 /* 656 * TSL2772 Specific power-on / adc enable sequence 657 * Power on the device 1st. 658 */ 659 ret = tsl2772_write_control_reg(chip, TSL2772_CNTL_PWR_ON); 660 if (ret < 0) 661 return ret; 662 663 /* 664 * Use the following shadow copy for our delay before enabling ADC. 665 * Write all the registers. 666 */ 667 for (i = 0, dev_reg = chip->tsl2772_config; 668 i < TSL2772_MAX_CONFIG_REG; i++) { 669 int reg = TSL2772_CMD_REG + i; 670 671 ret = i2c_smbus_write_byte_data(chip->client, reg, 672 *dev_reg++); 673 if (ret < 0) { 674 dev_err(&chip->client->dev, 675 "%s: failed to write to register %x: %d\n", 676 __func__, reg, ret); 677 return ret; 678 } 679 } 680 681 /* Power-on settling time */ 682 usleep_range(3000, 3500); 683 684 reg_val = TSL2772_CNTL_PWR_ON | TSL2772_CNTL_ADC_ENBL | 685 TSL2772_CNTL_PROX_DET_ENBL; 686 if (chip->settings.als_interrupt_en) 687 reg_val |= TSL2772_CNTL_ALS_INT_ENBL; 688 if (chip->settings.prox_interrupt_en) 689 reg_val |= TSL2772_CNTL_PROX_INT_ENBL; 690 691 ret = tsl2772_write_control_reg(chip, reg_val); 692 if (ret < 0) 693 return ret; 694 695 ret = i2c_smbus_write_byte(chip->client, 696 TSL2772_CMD_REG | TSL2772_CMD_SPL_FN | 697 TSL2772_CMD_PROXALS_INT_CLR); 698 if (ret < 0) { 699 dev_err(&chip->client->dev, 700 "%s: failed to clear interrupt status: %d\n", 701 __func__, ret); 702 return ret; 703 } 704 705 chip->tsl2772_chip_status = TSL2772_CHIP_WORKING; 706 707 return ret; 708 } 709 710 static int tsl2772_chip_off(struct iio_dev *indio_dev) 711 { 712 struct tsl2772_chip *chip = iio_priv(indio_dev); 713 714 /* turn device off */ 715 chip->tsl2772_chip_status = TSL2772_CHIP_SUSPENDED; 716 return tsl2772_write_control_reg(chip, 0x00); 717 } 718 719 /** 720 * tsl2772_invoke_change - power cycle the device to implement the user 721 * parameters 722 * @indio_dev: pointer to IIO device 723 * 724 * Obtain and lock both ALS and PROX resources, determine and save device state 725 * (On/Off), cycle device to implement updated parameter, put device back into 726 * proper state, and unlock resource. 727 */ 728 static int tsl2772_invoke_change(struct iio_dev *indio_dev) 729 { 730 struct tsl2772_chip *chip = iio_priv(indio_dev); 731 int device_status = chip->tsl2772_chip_status; 732 int ret; 733 734 mutex_lock(&chip->als_mutex); 735 mutex_lock(&chip->prox_mutex); 736 737 if (device_status == TSL2772_CHIP_WORKING) { 738 ret = tsl2772_chip_off(indio_dev); 739 if (ret < 0) 740 goto unlock; 741 } 742 743 ret = tsl2772_chip_on(indio_dev); 744 745 unlock: 746 mutex_unlock(&chip->prox_mutex); 747 mutex_unlock(&chip->als_mutex); 748 749 return ret; 750 } 751 752 static int tsl2772_prox_cal(struct iio_dev *indio_dev) 753 { 754 struct tsl2772_chip *chip = iio_priv(indio_dev); 755 int prox_history[MAX_SAMPLES_CAL + 1]; 756 int i, ret, mean, max, sample_sum; 757 758 if (chip->settings.prox_max_samples_cal < 1 || 759 chip->settings.prox_max_samples_cal > MAX_SAMPLES_CAL) 760 return -EINVAL; 761 762 for (i = 0; i < chip->settings.prox_max_samples_cal; i++) { 763 usleep_range(15000, 17500); 764 ret = tsl2772_get_prox(indio_dev); 765 if (ret < 0) 766 return ret; 767 768 prox_history[i] = chip->prox_data; 769 } 770 771 sample_sum = 0; 772 max = INT_MIN; 773 for (i = 0; i < chip->settings.prox_max_samples_cal; i++) { 774 sample_sum += prox_history[i]; 775 max = max(max, prox_history[i]); 776 } 777 mean = sample_sum / chip->settings.prox_max_samples_cal; 778 779 chip->settings.prox_thres_high = (max << 1) - mean; 780 781 return tsl2772_invoke_change(indio_dev); 782 } 783 784 static int tsl2772_read_avail(struct iio_dev *indio_dev, 785 struct iio_chan_spec const *chan, 786 const int **vals, int *type, int *length, 787 long mask) 788 { 789 struct tsl2772_chip *chip = iio_priv(indio_dev); 790 791 switch (mask) { 792 case IIO_CHAN_INFO_CALIBSCALE: 793 if (chan->type == IIO_INTENSITY) { 794 *length = ARRAY_SIZE(tsl2772_int_calibscale_avail); 795 *vals = tsl2772_int_calibscale_avail; 796 } else { 797 *length = ARRAY_SIZE(tsl2772_prox_calibscale_avail); 798 *vals = tsl2772_prox_calibscale_avail; 799 } 800 *type = IIO_VAL_INT; 801 return IIO_AVAIL_LIST; 802 case IIO_CHAN_INFO_INT_TIME: 803 *length = ARRAY_SIZE(tsl2772_int_time_avail[chip->id]); 804 *vals = tsl2772_int_time_avail[chip->id]; 805 *type = IIO_VAL_INT_PLUS_MICRO; 806 return IIO_AVAIL_RANGE; 807 } 808 809 return -EINVAL; 810 } 811 812 static ssize_t in_illuminance0_target_input_show(struct device *dev, 813 struct device_attribute *attr, 814 char *buf) 815 { 816 struct tsl2772_chip *chip = iio_priv(dev_to_iio_dev(dev)); 817 818 return snprintf(buf, PAGE_SIZE, "%d\n", chip->settings.als_cal_target); 819 } 820 821 static ssize_t in_illuminance0_target_input_store(struct device *dev, 822 struct device_attribute *attr, 823 const char *buf, size_t len) 824 { 825 struct iio_dev *indio_dev = dev_to_iio_dev(dev); 826 struct tsl2772_chip *chip = iio_priv(indio_dev); 827 u16 value; 828 int ret; 829 830 if (kstrtou16(buf, 0, &value)) 831 return -EINVAL; 832 833 chip->settings.als_cal_target = value; 834 ret = tsl2772_invoke_change(indio_dev); 835 if (ret < 0) 836 return ret; 837 838 return len; 839 } 840 841 static ssize_t in_illuminance0_calibrate_store(struct device *dev, 842 struct device_attribute *attr, 843 const char *buf, size_t len) 844 { 845 struct iio_dev *indio_dev = dev_to_iio_dev(dev); 846 bool value; 847 int ret; 848 849 if (kstrtobool(buf, &value) || !value) 850 return -EINVAL; 851 852 ret = tsl2772_als_calibrate(indio_dev); 853 if (ret < 0) 854 return ret; 855 856 ret = tsl2772_invoke_change(indio_dev); 857 if (ret < 0) 858 return ret; 859 860 return len; 861 } 862 863 static ssize_t in_illuminance0_lux_table_show(struct device *dev, 864 struct device_attribute *attr, 865 char *buf) 866 { 867 struct tsl2772_chip *chip = iio_priv(dev_to_iio_dev(dev)); 868 int i = 0; 869 int offset = 0; 870 871 while (i < TSL2772_MAX_LUX_TABLE_SIZE) { 872 offset += snprintf(buf + offset, PAGE_SIZE, "%u,%u,", 873 chip->tsl2772_device_lux[i].ch0, 874 chip->tsl2772_device_lux[i].ch1); 875 if (chip->tsl2772_device_lux[i].ch0 == 0) { 876 /* 877 * We just printed the first "0" entry. 878 * Now get rid of the extra "," and break. 879 */ 880 offset--; 881 break; 882 } 883 i++; 884 } 885 886 offset += snprintf(buf + offset, PAGE_SIZE, "\n"); 887 return offset; 888 } 889 890 static ssize_t in_illuminance0_lux_table_store(struct device *dev, 891 struct device_attribute *attr, 892 const char *buf, size_t len) 893 { 894 struct iio_dev *indio_dev = dev_to_iio_dev(dev); 895 struct tsl2772_chip *chip = iio_priv(indio_dev); 896 int value[ARRAY_SIZE(chip->tsl2772_device_lux) * 2 + 1]; 897 int n, ret; 898 899 get_options(buf, ARRAY_SIZE(value), value); 900 901 /* 902 * We now have an array of ints starting at value[1], and 903 * enumerated by value[0]. 904 * We expect each group of two ints to be one table entry, 905 * and the last table entry is all 0. 906 */ 907 n = value[0]; 908 if ((n % 2) || n < 4 || 909 n > ((ARRAY_SIZE(chip->tsl2772_device_lux) - 1) * 2)) 910 return -EINVAL; 911 912 if ((value[(n - 1)] | value[n]) != 0) 913 return -EINVAL; 914 915 if (chip->tsl2772_chip_status == TSL2772_CHIP_WORKING) { 916 ret = tsl2772_chip_off(indio_dev); 917 if (ret < 0) 918 return ret; 919 } 920 921 /* Zero out the table */ 922 memset(chip->tsl2772_device_lux, 0, sizeof(chip->tsl2772_device_lux)); 923 memcpy(chip->tsl2772_device_lux, &value[1], (value[0] * 4)); 924 925 ret = tsl2772_invoke_change(indio_dev); 926 if (ret < 0) 927 return ret; 928 929 return len; 930 } 931 932 static ssize_t in_proximity0_calibrate_store(struct device *dev, 933 struct device_attribute *attr, 934 const char *buf, size_t len) 935 { 936 struct iio_dev *indio_dev = dev_to_iio_dev(dev); 937 bool value; 938 int ret; 939 940 if (kstrtobool(buf, &value) || !value) 941 return -EINVAL; 942 943 ret = tsl2772_prox_cal(indio_dev); 944 if (ret < 0) 945 return ret; 946 947 ret = tsl2772_invoke_change(indio_dev); 948 if (ret < 0) 949 return ret; 950 951 return len; 952 } 953 954 static int tsl2772_read_interrupt_config(struct iio_dev *indio_dev, 955 const struct iio_chan_spec *chan, 956 enum iio_event_type type, 957 enum iio_event_direction dir) 958 { 959 struct tsl2772_chip *chip = iio_priv(indio_dev); 960 961 if (chan->type == IIO_INTENSITY) 962 return chip->settings.als_interrupt_en; 963 else 964 return chip->settings.prox_interrupt_en; 965 } 966 967 static int tsl2772_write_interrupt_config(struct iio_dev *indio_dev, 968 const struct iio_chan_spec *chan, 969 enum iio_event_type type, 970 enum iio_event_direction dir, 971 int val) 972 { 973 struct tsl2772_chip *chip = iio_priv(indio_dev); 974 975 if (chan->type == IIO_INTENSITY) 976 chip->settings.als_interrupt_en = val ? true : false; 977 else 978 chip->settings.prox_interrupt_en = val ? true : false; 979 980 return tsl2772_invoke_change(indio_dev); 981 } 982 983 static int tsl2772_write_event_value(struct iio_dev *indio_dev, 984 const struct iio_chan_spec *chan, 985 enum iio_event_type type, 986 enum iio_event_direction dir, 987 enum iio_event_info info, 988 int val, int val2) 989 { 990 struct tsl2772_chip *chip = iio_priv(indio_dev); 991 int ret = -EINVAL, count, persistence; 992 u8 time; 993 994 switch (info) { 995 case IIO_EV_INFO_VALUE: 996 if (chan->type == IIO_INTENSITY) { 997 switch (dir) { 998 case IIO_EV_DIR_RISING: 999 chip->settings.als_thresh_high = val; 1000 ret = 0; 1001 break; 1002 case IIO_EV_DIR_FALLING: 1003 chip->settings.als_thresh_low = val; 1004 ret = 0; 1005 break; 1006 default: 1007 break; 1008 } 1009 } else { 1010 switch (dir) { 1011 case IIO_EV_DIR_RISING: 1012 chip->settings.prox_thres_high = val; 1013 ret = 0; 1014 break; 1015 case IIO_EV_DIR_FALLING: 1016 chip->settings.prox_thres_low = val; 1017 ret = 0; 1018 break; 1019 default: 1020 break; 1021 } 1022 } 1023 break; 1024 case IIO_EV_INFO_PERIOD: 1025 if (chan->type == IIO_INTENSITY) 1026 time = chip->settings.als_time; 1027 else 1028 time = chip->settings.prox_time; 1029 1030 count = 256 - time; 1031 persistence = ((val * 1000000) + val2) / 1032 (count * tsl2772_int_time_avail[chip->id][3]); 1033 1034 if (chan->type == IIO_INTENSITY) { 1035 /* ALS filter values are 1, 2, 3, 5, 10, 15, ..., 60 */ 1036 if (persistence > 3) 1037 persistence = (persistence / 5) + 3; 1038 1039 chip->settings.als_persistence = persistence; 1040 } else { 1041 chip->settings.prox_persistence = persistence; 1042 } 1043 1044 ret = 0; 1045 break; 1046 default: 1047 break; 1048 } 1049 1050 if (ret < 0) 1051 return ret; 1052 1053 return tsl2772_invoke_change(indio_dev); 1054 } 1055 1056 static int tsl2772_read_event_value(struct iio_dev *indio_dev, 1057 const struct iio_chan_spec *chan, 1058 enum iio_event_type type, 1059 enum iio_event_direction dir, 1060 enum iio_event_info info, 1061 int *val, int *val2) 1062 { 1063 struct tsl2772_chip *chip = iio_priv(indio_dev); 1064 int filter_delay, persistence; 1065 u8 time; 1066 1067 switch (info) { 1068 case IIO_EV_INFO_VALUE: 1069 if (chan->type == IIO_INTENSITY) { 1070 switch (dir) { 1071 case IIO_EV_DIR_RISING: 1072 *val = chip->settings.als_thresh_high; 1073 return IIO_VAL_INT; 1074 case IIO_EV_DIR_FALLING: 1075 *val = chip->settings.als_thresh_low; 1076 return IIO_VAL_INT; 1077 default: 1078 return -EINVAL; 1079 } 1080 } else { 1081 switch (dir) { 1082 case IIO_EV_DIR_RISING: 1083 *val = chip->settings.prox_thres_high; 1084 return IIO_VAL_INT; 1085 case IIO_EV_DIR_FALLING: 1086 *val = chip->settings.prox_thres_low; 1087 return IIO_VAL_INT; 1088 default: 1089 return -EINVAL; 1090 } 1091 } 1092 break; 1093 case IIO_EV_INFO_PERIOD: 1094 if (chan->type == IIO_INTENSITY) { 1095 time = chip->settings.als_time; 1096 persistence = chip->settings.als_persistence; 1097 1098 /* ALS filter values are 1, 2, 3, 5, 10, 15, ..., 60 */ 1099 if (persistence > 3) 1100 persistence = (persistence - 3) * 5; 1101 } else { 1102 time = chip->settings.prox_time; 1103 persistence = chip->settings.prox_persistence; 1104 } 1105 1106 filter_delay = persistence * (256 - time) * 1107 tsl2772_int_time_avail[chip->id][3]; 1108 1109 *val = filter_delay / 1000000; 1110 *val2 = filter_delay % 1000000; 1111 return IIO_VAL_INT_PLUS_MICRO; 1112 default: 1113 return -EINVAL; 1114 } 1115 } 1116 1117 static int tsl2772_read_raw(struct iio_dev *indio_dev, 1118 struct iio_chan_spec const *chan, 1119 int *val, 1120 int *val2, 1121 long mask) 1122 { 1123 struct tsl2772_chip *chip = iio_priv(indio_dev); 1124 1125 switch (mask) { 1126 case IIO_CHAN_INFO_PROCESSED: 1127 switch (chan->type) { 1128 case IIO_LIGHT: 1129 tsl2772_get_lux(indio_dev); 1130 *val = chip->als_cur_info.lux; 1131 return IIO_VAL_INT; 1132 default: 1133 return -EINVAL; 1134 } 1135 case IIO_CHAN_INFO_RAW: 1136 switch (chan->type) { 1137 case IIO_INTENSITY: 1138 tsl2772_get_lux(indio_dev); 1139 if (chan->channel == 0) 1140 *val = chip->als_cur_info.als_ch0; 1141 else 1142 *val = chip->als_cur_info.als_ch1; 1143 return IIO_VAL_INT; 1144 case IIO_PROXIMITY: 1145 tsl2772_get_prox(indio_dev); 1146 *val = chip->prox_data; 1147 return IIO_VAL_INT; 1148 default: 1149 return -EINVAL; 1150 } 1151 break; 1152 case IIO_CHAN_INFO_CALIBSCALE: 1153 if (chan->type == IIO_LIGHT) 1154 *val = tsl2772_als_gain[chip->settings.als_gain]; 1155 else 1156 *val = tsl2772_prox_gain[chip->settings.prox_gain]; 1157 return IIO_VAL_INT; 1158 case IIO_CHAN_INFO_CALIBBIAS: 1159 *val = chip->settings.als_gain_trim; 1160 return IIO_VAL_INT; 1161 case IIO_CHAN_INFO_INT_TIME: 1162 *val = 0; 1163 *val2 = (256 - chip->settings.als_time) * 1164 tsl2772_int_time_avail[chip->id][3]; 1165 return IIO_VAL_INT_PLUS_MICRO; 1166 default: 1167 return -EINVAL; 1168 } 1169 } 1170 1171 static int tsl2772_write_raw(struct iio_dev *indio_dev, 1172 struct iio_chan_spec const *chan, 1173 int val, 1174 int val2, 1175 long mask) 1176 { 1177 struct tsl2772_chip *chip = iio_priv(indio_dev); 1178 1179 switch (mask) { 1180 case IIO_CHAN_INFO_CALIBSCALE: 1181 if (chan->type == IIO_INTENSITY) { 1182 switch (val) { 1183 case 1: 1184 chip->settings.als_gain = 0; 1185 break; 1186 case 8: 1187 chip->settings.als_gain = 1; 1188 break; 1189 case 16: 1190 chip->settings.als_gain = 2; 1191 break; 1192 case 120: 1193 chip->settings.als_gain = 3; 1194 break; 1195 default: 1196 return -EINVAL; 1197 } 1198 } else { 1199 switch (val) { 1200 case 1: 1201 chip->settings.prox_gain = 0; 1202 break; 1203 case 2: 1204 chip->settings.prox_gain = 1; 1205 break; 1206 case 4: 1207 chip->settings.prox_gain = 2; 1208 break; 1209 case 8: 1210 chip->settings.prox_gain = 3; 1211 break; 1212 default: 1213 return -EINVAL; 1214 } 1215 } 1216 break; 1217 case IIO_CHAN_INFO_CALIBBIAS: 1218 if (val < TSL2772_ALS_GAIN_TRIM_MIN || 1219 val > TSL2772_ALS_GAIN_TRIM_MAX) 1220 return -EINVAL; 1221 1222 chip->settings.als_gain_trim = val; 1223 break; 1224 case IIO_CHAN_INFO_INT_TIME: 1225 if (val != 0 || val2 < tsl2772_int_time_avail[chip->id][1] || 1226 val2 > tsl2772_int_time_avail[chip->id][5]) 1227 return -EINVAL; 1228 1229 chip->settings.als_time = 256 - 1230 (val2 / tsl2772_int_time_avail[chip->id][3]); 1231 break; 1232 default: 1233 return -EINVAL; 1234 } 1235 1236 return tsl2772_invoke_change(indio_dev); 1237 } 1238 1239 static DEVICE_ATTR_RW(in_illuminance0_target_input); 1240 1241 static DEVICE_ATTR_WO(in_illuminance0_calibrate); 1242 1243 static DEVICE_ATTR_WO(in_proximity0_calibrate); 1244 1245 static DEVICE_ATTR_RW(in_illuminance0_lux_table); 1246 1247 /* Use the default register values to identify the Taos device */ 1248 static int tsl2772_device_id_verif(int id, int target) 1249 { 1250 switch (target) { 1251 case tsl2571: 1252 case tsl2671: 1253 case tsl2771: 1254 return (id & 0xf0) == TRITON_ID; 1255 case tmd2671: 1256 case tmd2771: 1257 return (id & 0xf0) == HALIBUT_ID; 1258 case tsl2572: 1259 case tsl2672: 1260 case tmd2672: 1261 case tsl2772: 1262 case tmd2772: 1263 return (id & 0xf0) == SWORDFISH_ID; 1264 } 1265 1266 return -EINVAL; 1267 } 1268 1269 static irqreturn_t tsl2772_event_handler(int irq, void *private) 1270 { 1271 struct iio_dev *indio_dev = private; 1272 struct tsl2772_chip *chip = iio_priv(indio_dev); 1273 s64 timestamp = iio_get_time_ns(indio_dev); 1274 int ret; 1275 1276 ret = tsl2772_read_status(chip); 1277 if (ret < 0) 1278 return IRQ_HANDLED; 1279 1280 /* What type of interrupt do we need to process */ 1281 if (ret & TSL2772_STA_PRX_INTR) { 1282 iio_push_event(indio_dev, 1283 IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 1284 0, 1285 IIO_EV_TYPE_THRESH, 1286 IIO_EV_DIR_EITHER), 1287 timestamp); 1288 } 1289 1290 if (ret & TSL2772_STA_ALS_INTR) { 1291 iio_push_event(indio_dev, 1292 IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 1293 0, 1294 IIO_EV_TYPE_THRESH, 1295 IIO_EV_DIR_EITHER), 1296 timestamp); 1297 } 1298 1299 ret = i2c_smbus_write_byte(chip->client, 1300 TSL2772_CMD_REG | TSL2772_CMD_SPL_FN | 1301 TSL2772_CMD_PROXALS_INT_CLR); 1302 if (ret < 0) 1303 dev_err(&chip->client->dev, 1304 "%s: failed to clear interrupt status: %d\n", 1305 __func__, ret); 1306 1307 return IRQ_HANDLED; 1308 } 1309 1310 static struct attribute *tsl2772_ALS_device_attrs[] = { 1311 &dev_attr_in_illuminance0_target_input.attr, 1312 &dev_attr_in_illuminance0_calibrate.attr, 1313 &dev_attr_in_illuminance0_lux_table.attr, 1314 NULL 1315 }; 1316 1317 static struct attribute *tsl2772_PRX_device_attrs[] = { 1318 &dev_attr_in_proximity0_calibrate.attr, 1319 NULL 1320 }; 1321 1322 static struct attribute *tsl2772_ALSPRX_device_attrs[] = { 1323 &dev_attr_in_illuminance0_target_input.attr, 1324 &dev_attr_in_illuminance0_calibrate.attr, 1325 &dev_attr_in_illuminance0_lux_table.attr, 1326 NULL 1327 }; 1328 1329 static struct attribute *tsl2772_PRX2_device_attrs[] = { 1330 &dev_attr_in_proximity0_calibrate.attr, 1331 NULL 1332 }; 1333 1334 static struct attribute *tsl2772_ALSPRX2_device_attrs[] = { 1335 &dev_attr_in_illuminance0_target_input.attr, 1336 &dev_attr_in_illuminance0_calibrate.attr, 1337 &dev_attr_in_illuminance0_lux_table.attr, 1338 &dev_attr_in_proximity0_calibrate.attr, 1339 NULL 1340 }; 1341 1342 static const struct attribute_group tsl2772_device_attr_group_tbl[] = { 1343 [ALS] = { 1344 .attrs = tsl2772_ALS_device_attrs, 1345 }, 1346 [PRX] = { 1347 .attrs = tsl2772_PRX_device_attrs, 1348 }, 1349 [ALSPRX] = { 1350 .attrs = tsl2772_ALSPRX_device_attrs, 1351 }, 1352 [PRX2] = { 1353 .attrs = tsl2772_PRX2_device_attrs, 1354 }, 1355 [ALSPRX2] = { 1356 .attrs = tsl2772_ALSPRX2_device_attrs, 1357 }, 1358 }; 1359 1360 #define TSL2772_DEVICE_INFO(type)[type] = \ 1361 { \ 1362 .attrs = &tsl2772_device_attr_group_tbl[type], \ 1363 .read_raw = &tsl2772_read_raw, \ 1364 .read_avail = &tsl2772_read_avail, \ 1365 .write_raw = &tsl2772_write_raw, \ 1366 .read_event_value = &tsl2772_read_event_value, \ 1367 .write_event_value = &tsl2772_write_event_value, \ 1368 .read_event_config = &tsl2772_read_interrupt_config, \ 1369 .write_event_config = &tsl2772_write_interrupt_config, \ 1370 } 1371 1372 static const struct iio_info tsl2772_device_info[] = { 1373 TSL2772_DEVICE_INFO(ALS), 1374 TSL2772_DEVICE_INFO(PRX), 1375 TSL2772_DEVICE_INFO(ALSPRX), 1376 TSL2772_DEVICE_INFO(PRX2), 1377 TSL2772_DEVICE_INFO(ALSPRX2), 1378 }; 1379 1380 static const struct iio_event_spec tsl2772_events[] = { 1381 { 1382 .type = IIO_EV_TYPE_THRESH, 1383 .dir = IIO_EV_DIR_RISING, 1384 .mask_separate = BIT(IIO_EV_INFO_VALUE), 1385 }, { 1386 .type = IIO_EV_TYPE_THRESH, 1387 .dir = IIO_EV_DIR_FALLING, 1388 .mask_separate = BIT(IIO_EV_INFO_VALUE), 1389 }, { 1390 .type = IIO_EV_TYPE_THRESH, 1391 .dir = IIO_EV_DIR_EITHER, 1392 .mask_separate = BIT(IIO_EV_INFO_PERIOD) | 1393 BIT(IIO_EV_INFO_ENABLE), 1394 }, 1395 }; 1396 1397 static const struct tsl2772_chip_info tsl2772_chip_info_tbl[] = { 1398 [ALS] = { 1399 .channel_with_events = { 1400 { 1401 .type = IIO_LIGHT, 1402 .indexed = 1, 1403 .channel = 0, 1404 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1405 }, { 1406 .type = IIO_INTENSITY, 1407 .indexed = 1, 1408 .channel = 0, 1409 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1410 BIT(IIO_CHAN_INFO_INT_TIME) | 1411 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1412 BIT(IIO_CHAN_INFO_CALIBBIAS), 1413 .info_mask_separate_available = 1414 BIT(IIO_CHAN_INFO_INT_TIME) | 1415 BIT(IIO_CHAN_INFO_CALIBSCALE), 1416 .event_spec = tsl2772_events, 1417 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1418 }, { 1419 .type = IIO_INTENSITY, 1420 .indexed = 1, 1421 .channel = 1, 1422 }, 1423 }, 1424 .channel_without_events = { 1425 { 1426 .type = IIO_LIGHT, 1427 .indexed = 1, 1428 .channel = 0, 1429 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1430 }, { 1431 .type = IIO_INTENSITY, 1432 .indexed = 1, 1433 .channel = 0, 1434 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1435 BIT(IIO_CHAN_INFO_INT_TIME) | 1436 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1437 BIT(IIO_CHAN_INFO_CALIBBIAS), 1438 .info_mask_separate_available = 1439 BIT(IIO_CHAN_INFO_INT_TIME) | 1440 BIT(IIO_CHAN_INFO_CALIBSCALE), 1441 }, { 1442 .type = IIO_INTENSITY, 1443 .indexed = 1, 1444 .channel = 1, 1445 }, 1446 }, 1447 .chan_table_elements = 3, 1448 .info = &tsl2772_device_info[ALS], 1449 }, 1450 [PRX] = { 1451 .channel_with_events = { 1452 { 1453 .type = IIO_PROXIMITY, 1454 .indexed = 1, 1455 .channel = 0, 1456 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1457 .event_spec = tsl2772_events, 1458 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1459 }, 1460 }, 1461 .channel_without_events = { 1462 { 1463 .type = IIO_PROXIMITY, 1464 .indexed = 1, 1465 .channel = 0, 1466 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1467 }, 1468 }, 1469 .chan_table_elements = 1, 1470 .info = &tsl2772_device_info[PRX], 1471 }, 1472 [ALSPRX] = { 1473 .channel_with_events = { 1474 { 1475 .type = IIO_LIGHT, 1476 .indexed = 1, 1477 .channel = 0, 1478 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1479 }, { 1480 .type = IIO_INTENSITY, 1481 .indexed = 1, 1482 .channel = 0, 1483 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1484 BIT(IIO_CHAN_INFO_INT_TIME) | 1485 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1486 BIT(IIO_CHAN_INFO_CALIBBIAS), 1487 .info_mask_separate_available = 1488 BIT(IIO_CHAN_INFO_INT_TIME) | 1489 BIT(IIO_CHAN_INFO_CALIBSCALE), 1490 .event_spec = tsl2772_events, 1491 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1492 }, { 1493 .type = IIO_INTENSITY, 1494 .indexed = 1, 1495 .channel = 1, 1496 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1497 }, { 1498 .type = IIO_PROXIMITY, 1499 .indexed = 1, 1500 .channel = 0, 1501 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1502 .event_spec = tsl2772_events, 1503 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1504 }, 1505 }, 1506 .channel_without_events = { 1507 { 1508 .type = IIO_LIGHT, 1509 .indexed = 1, 1510 .channel = 0, 1511 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1512 }, { 1513 .type = IIO_INTENSITY, 1514 .indexed = 1, 1515 .channel = 0, 1516 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1517 BIT(IIO_CHAN_INFO_INT_TIME) | 1518 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1519 BIT(IIO_CHAN_INFO_CALIBBIAS), 1520 .info_mask_separate_available = 1521 BIT(IIO_CHAN_INFO_INT_TIME) | 1522 BIT(IIO_CHAN_INFO_CALIBSCALE), 1523 }, { 1524 .type = IIO_INTENSITY, 1525 .indexed = 1, 1526 .channel = 1, 1527 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1528 }, { 1529 .type = IIO_PROXIMITY, 1530 .indexed = 1, 1531 .channel = 0, 1532 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1533 }, 1534 }, 1535 .chan_table_elements = 4, 1536 .info = &tsl2772_device_info[ALSPRX], 1537 }, 1538 [PRX2] = { 1539 .channel_with_events = { 1540 { 1541 .type = IIO_PROXIMITY, 1542 .indexed = 1, 1543 .channel = 0, 1544 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1545 BIT(IIO_CHAN_INFO_CALIBSCALE), 1546 .info_mask_separate_available = 1547 BIT(IIO_CHAN_INFO_CALIBSCALE), 1548 .event_spec = tsl2772_events, 1549 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1550 }, 1551 }, 1552 .channel_without_events = { 1553 { 1554 .type = IIO_PROXIMITY, 1555 .indexed = 1, 1556 .channel = 0, 1557 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1558 BIT(IIO_CHAN_INFO_CALIBSCALE), 1559 .info_mask_separate_available = 1560 BIT(IIO_CHAN_INFO_CALIBSCALE), 1561 }, 1562 }, 1563 .chan_table_elements = 1, 1564 .info = &tsl2772_device_info[PRX2], 1565 }, 1566 [ALSPRX2] = { 1567 .channel_with_events = { 1568 { 1569 .type = IIO_LIGHT, 1570 .indexed = 1, 1571 .channel = 0, 1572 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1573 }, { 1574 .type = IIO_INTENSITY, 1575 .indexed = 1, 1576 .channel = 0, 1577 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1578 BIT(IIO_CHAN_INFO_INT_TIME) | 1579 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1580 BIT(IIO_CHAN_INFO_CALIBBIAS), 1581 .info_mask_separate_available = 1582 BIT(IIO_CHAN_INFO_INT_TIME) | 1583 BIT(IIO_CHAN_INFO_CALIBSCALE), 1584 .event_spec = tsl2772_events, 1585 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1586 }, { 1587 .type = IIO_INTENSITY, 1588 .indexed = 1, 1589 .channel = 1, 1590 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1591 }, { 1592 .type = IIO_PROXIMITY, 1593 .indexed = 1, 1594 .channel = 0, 1595 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1596 BIT(IIO_CHAN_INFO_CALIBSCALE), 1597 .info_mask_separate_available = 1598 BIT(IIO_CHAN_INFO_CALIBSCALE), 1599 .event_spec = tsl2772_events, 1600 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1601 }, 1602 }, 1603 .channel_without_events = { 1604 { 1605 .type = IIO_LIGHT, 1606 .indexed = 1, 1607 .channel = 0, 1608 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1609 }, { 1610 .type = IIO_INTENSITY, 1611 .indexed = 1, 1612 .channel = 0, 1613 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1614 BIT(IIO_CHAN_INFO_INT_TIME) | 1615 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1616 BIT(IIO_CHAN_INFO_CALIBBIAS), 1617 .info_mask_separate_available = 1618 BIT(IIO_CHAN_INFO_INT_TIME) | 1619 BIT(IIO_CHAN_INFO_CALIBSCALE), 1620 }, { 1621 .type = IIO_INTENSITY, 1622 .indexed = 1, 1623 .channel = 1, 1624 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1625 }, { 1626 .type = IIO_PROXIMITY, 1627 .indexed = 1, 1628 .channel = 0, 1629 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1630 BIT(IIO_CHAN_INFO_CALIBSCALE), 1631 .info_mask_separate_available = 1632 BIT(IIO_CHAN_INFO_CALIBSCALE), 1633 }, 1634 }, 1635 .chan_table_elements = 4, 1636 .info = &tsl2772_device_info[ALSPRX2], 1637 }, 1638 }; 1639 1640 static int tsl2772_probe(struct i2c_client *clientp, 1641 const struct i2c_device_id *id) 1642 { 1643 struct iio_dev *indio_dev; 1644 struct tsl2772_chip *chip; 1645 int ret; 1646 1647 indio_dev = devm_iio_device_alloc(&clientp->dev, sizeof(*chip)); 1648 if (!indio_dev) 1649 return -ENOMEM; 1650 1651 chip = iio_priv(indio_dev); 1652 chip->client = clientp; 1653 i2c_set_clientdata(clientp, indio_dev); 1654 1655 ret = i2c_smbus_read_byte_data(chip->client, 1656 TSL2772_CMD_REG | TSL2772_CHIPID); 1657 if (ret < 0) 1658 return ret; 1659 1660 if (tsl2772_device_id_verif(ret, id->driver_data) <= 0) { 1661 dev_info(&chip->client->dev, 1662 "%s: i2c device found does not match expected id\n", 1663 __func__); 1664 return -EINVAL; 1665 } 1666 1667 ret = i2c_smbus_write_byte(clientp, TSL2772_CMD_REG | TSL2772_CNTRL); 1668 if (ret < 0) { 1669 dev_err(&clientp->dev, 1670 "%s: Failed to write to CMD register: %d\n", 1671 __func__, ret); 1672 return ret; 1673 } 1674 1675 mutex_init(&chip->als_mutex); 1676 mutex_init(&chip->prox_mutex); 1677 1678 chip->tsl2772_chip_status = TSL2772_CHIP_UNKNOWN; 1679 chip->pdata = dev_get_platdata(&clientp->dev); 1680 chip->id = id->driver_data; 1681 chip->chip_info = 1682 &tsl2772_chip_info_tbl[device_channel_config[id->driver_data]]; 1683 1684 indio_dev->info = chip->chip_info->info; 1685 indio_dev->dev.parent = &clientp->dev; 1686 indio_dev->modes = INDIO_DIRECT_MODE; 1687 indio_dev->name = chip->client->name; 1688 indio_dev->num_channels = chip->chip_info->chan_table_elements; 1689 1690 if (clientp->irq) { 1691 indio_dev->channels = chip->chip_info->channel_with_events; 1692 1693 ret = devm_request_threaded_irq(&clientp->dev, clientp->irq, 1694 NULL, 1695 &tsl2772_event_handler, 1696 IRQF_TRIGGER_FALLING | 1697 IRQF_ONESHOT, 1698 "TSL2772_event", 1699 indio_dev); 1700 if (ret) { 1701 dev_err(&clientp->dev, 1702 "%s: irq request failed\n", __func__); 1703 return ret; 1704 } 1705 } else { 1706 indio_dev->channels = chip->chip_info->channel_without_events; 1707 } 1708 1709 tsl2772_defaults(chip); 1710 ret = tsl2772_chip_on(indio_dev); 1711 if (ret < 0) 1712 return ret; 1713 1714 ret = iio_device_register(indio_dev); 1715 if (ret) { 1716 tsl2772_chip_off(indio_dev); 1717 dev_err(&clientp->dev, 1718 "%s: iio registration failed\n", __func__); 1719 return ret; 1720 } 1721 1722 return 0; 1723 } 1724 1725 static int tsl2772_suspend(struct device *dev) 1726 { 1727 struct iio_dev *indio_dev = dev_get_drvdata(dev); 1728 1729 return tsl2772_chip_off(indio_dev); 1730 } 1731 1732 static int tsl2772_resume(struct device *dev) 1733 { 1734 struct iio_dev *indio_dev = dev_get_drvdata(dev); 1735 1736 return tsl2772_chip_on(indio_dev); 1737 } 1738 1739 static int tsl2772_remove(struct i2c_client *client) 1740 { 1741 struct iio_dev *indio_dev = i2c_get_clientdata(client); 1742 1743 tsl2772_chip_off(indio_dev); 1744 1745 iio_device_unregister(indio_dev); 1746 1747 return 0; 1748 } 1749 1750 static const struct i2c_device_id tsl2772_idtable[] = { 1751 { "tsl2571", tsl2571 }, 1752 { "tsl2671", tsl2671 }, 1753 { "tmd2671", tmd2671 }, 1754 { "tsl2771", tsl2771 }, 1755 { "tmd2771", tmd2771 }, 1756 { "tsl2572", tsl2572 }, 1757 { "tsl2672", tsl2672 }, 1758 { "tmd2672", tmd2672 }, 1759 { "tsl2772", tsl2772 }, 1760 { "tmd2772", tmd2772 }, 1761 {} 1762 }; 1763 1764 MODULE_DEVICE_TABLE(i2c, tsl2772_idtable); 1765 1766 static const struct of_device_id tsl2772_of_match[] = { 1767 { .compatible = "amstaos,tsl2571" }, 1768 { .compatible = "amstaos,tsl2671" }, 1769 { .compatible = "amstaos,tmd2671" }, 1770 { .compatible = "amstaos,tsl2771" }, 1771 { .compatible = "amstaos,tmd2771" }, 1772 { .compatible = "amstaos,tsl2572" }, 1773 { .compatible = "amstaos,tsl2672" }, 1774 { .compatible = "amstaos,tmd2672" }, 1775 { .compatible = "amstaos,tsl2772" }, 1776 { .compatible = "amstaos,tmd2772" }, 1777 {} 1778 }; 1779 MODULE_DEVICE_TABLE(of, tsl2772_of_match); 1780 1781 static const struct dev_pm_ops tsl2772_pm_ops = { 1782 .suspend = tsl2772_suspend, 1783 .resume = tsl2772_resume, 1784 }; 1785 1786 static struct i2c_driver tsl2772_driver = { 1787 .driver = { 1788 .name = "tsl2772", 1789 .of_match_table = tsl2772_of_match, 1790 .pm = &tsl2772_pm_ops, 1791 }, 1792 .id_table = tsl2772_idtable, 1793 .probe = tsl2772_probe, 1794 .remove = tsl2772_remove, 1795 }; 1796 1797 module_i2c_driver(tsl2772_driver); 1798 1799 MODULE_AUTHOR("J. August Brenner <Jon.Brenner@ams.com>"); 1800 MODULE_AUTHOR("Brian Masney <masneyb@onstation.org>"); 1801 MODULE_DESCRIPTION("TAOS tsl2772 ambient and proximity light sensor driver"); 1802 MODULE_LICENSE("GPL"); 1803