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 } 585 586 ret = (chip->settings.als_cal_target * chip->settings.als_gain_trim) / 587 lux_val; 588 if (ret < TSL2772_ALS_GAIN_TRIM_MIN || ret > TSL2772_ALS_GAIN_TRIM_MAX) 589 return -ERANGE; 590 591 chip->settings.als_gain_trim = ret; 592 593 return ret; 594 } 595 596 static int tsl2772_chip_on(struct iio_dev *indio_dev) 597 { 598 struct tsl2772_chip *chip = iio_priv(indio_dev); 599 int ret, i, als_count, als_time_us; 600 u8 *dev_reg, reg_val; 601 602 /* Non calculated parameters */ 603 chip->tsl2772_config[TSL2772_ALS_TIME] = chip->settings.als_time; 604 chip->tsl2772_config[TSL2772_PRX_TIME] = chip->settings.prox_time; 605 chip->tsl2772_config[TSL2772_WAIT_TIME] = chip->settings.wait_time; 606 chip->tsl2772_config[TSL2772_ALS_PRX_CONFIG] = 607 chip->settings.als_prox_config; 608 609 chip->tsl2772_config[TSL2772_ALS_MINTHRESHLO] = 610 (chip->settings.als_thresh_low) & 0xFF; 611 chip->tsl2772_config[TSL2772_ALS_MINTHRESHHI] = 612 (chip->settings.als_thresh_low >> 8) & 0xFF; 613 chip->tsl2772_config[TSL2772_ALS_MAXTHRESHLO] = 614 (chip->settings.als_thresh_high) & 0xFF; 615 chip->tsl2772_config[TSL2772_ALS_MAXTHRESHHI] = 616 (chip->settings.als_thresh_high >> 8) & 0xFF; 617 chip->tsl2772_config[TSL2772_PERSISTENCE] = 618 (chip->settings.prox_persistence & 0xFF) << 4 | 619 (chip->settings.als_persistence & 0xFF); 620 621 chip->tsl2772_config[TSL2772_PRX_COUNT] = 622 chip->settings.prox_pulse_count; 623 chip->tsl2772_config[TSL2772_PRX_MINTHRESHLO] = 624 (chip->settings.prox_thres_low) & 0xFF; 625 chip->tsl2772_config[TSL2772_PRX_MINTHRESHHI] = 626 (chip->settings.prox_thres_low >> 8) & 0xFF; 627 chip->tsl2772_config[TSL2772_PRX_MAXTHRESHLO] = 628 (chip->settings.prox_thres_high) & 0xFF; 629 chip->tsl2772_config[TSL2772_PRX_MAXTHRESHHI] = 630 (chip->settings.prox_thres_high >> 8) & 0xFF; 631 632 /* and make sure we're not already on */ 633 if (chip->tsl2772_chip_status == TSL2772_CHIP_WORKING) { 634 /* if forcing a register update - turn off, then on */ 635 dev_info(&chip->client->dev, "device is already enabled\n"); 636 return -EINVAL; 637 } 638 639 /* Set the gain based on tsl2772_settings struct */ 640 chip->tsl2772_config[TSL2772_GAIN] = 641 (chip->settings.als_gain & 0xFF) | 642 ((chip->settings.prox_gain & 0xFF) << 2) | 643 (chip->settings.prox_diode << 4) | 644 (chip->settings.prox_power << 6); 645 646 /* set chip time scaling and saturation */ 647 als_count = 256 - chip->settings.als_time; 648 als_time_us = als_count * tsl2772_int_time_avail[chip->id][3]; 649 chip->als_saturation = als_count * 768; /* 75% of full scale */ 650 chip->als_gain_time_scale = als_time_us * 651 tsl2772_als_gain[chip->settings.als_gain]; 652 653 /* 654 * TSL2772 Specific power-on / adc enable sequence 655 * Power on the device 1st. 656 */ 657 ret = tsl2772_write_control_reg(chip, TSL2772_CNTL_PWR_ON); 658 if (ret < 0) 659 return ret; 660 661 /* 662 * Use the following shadow copy for our delay before enabling ADC. 663 * Write all the registers. 664 */ 665 for (i = 0, dev_reg = chip->tsl2772_config; 666 i < TSL2772_MAX_CONFIG_REG; i++) { 667 int reg = TSL2772_CMD_REG + i; 668 669 ret = i2c_smbus_write_byte_data(chip->client, reg, 670 *dev_reg++); 671 if (ret < 0) { 672 dev_err(&chip->client->dev, 673 "%s: failed to write to register %x: %d\n", 674 __func__, reg, ret); 675 return ret; 676 } 677 } 678 679 /* Power-on settling time */ 680 usleep_range(3000, 3500); 681 682 reg_val = TSL2772_CNTL_PWR_ON | TSL2772_CNTL_ADC_ENBL | 683 TSL2772_CNTL_PROX_DET_ENBL; 684 if (chip->settings.als_interrupt_en) 685 reg_val |= TSL2772_CNTL_ALS_INT_ENBL; 686 if (chip->settings.prox_interrupt_en) 687 reg_val |= TSL2772_CNTL_PROX_INT_ENBL; 688 689 ret = tsl2772_write_control_reg(chip, reg_val); 690 if (ret < 0) 691 return ret; 692 693 ret = i2c_smbus_write_byte(chip->client, 694 TSL2772_CMD_REG | TSL2772_CMD_SPL_FN | 695 TSL2772_CMD_PROXALS_INT_CLR); 696 if (ret < 0) { 697 dev_err(&chip->client->dev, 698 "%s: failed to clear interrupt status: %d\n", 699 __func__, ret); 700 return ret; 701 } 702 703 chip->tsl2772_chip_status = TSL2772_CHIP_WORKING; 704 705 return ret; 706 } 707 708 static int tsl2772_chip_off(struct iio_dev *indio_dev) 709 { 710 struct tsl2772_chip *chip = iio_priv(indio_dev); 711 712 /* turn device off */ 713 chip->tsl2772_chip_status = TSL2772_CHIP_SUSPENDED; 714 return tsl2772_write_control_reg(chip, 0x00); 715 } 716 717 /** 718 * tsl2772_invoke_change - power cycle the device to implement the user 719 * parameters 720 * @indio_dev: pointer to IIO device 721 * 722 * Obtain and lock both ALS and PROX resources, determine and save device state 723 * (On/Off), cycle device to implement updated parameter, put device back into 724 * proper state, and unlock resource. 725 */ 726 static int tsl2772_invoke_change(struct iio_dev *indio_dev) 727 { 728 struct tsl2772_chip *chip = iio_priv(indio_dev); 729 int device_status = chip->tsl2772_chip_status; 730 int ret; 731 732 mutex_lock(&chip->als_mutex); 733 mutex_lock(&chip->prox_mutex); 734 735 if (device_status == TSL2772_CHIP_WORKING) { 736 ret = tsl2772_chip_off(indio_dev); 737 if (ret < 0) 738 goto unlock; 739 } 740 741 ret = tsl2772_chip_on(indio_dev); 742 743 unlock: 744 mutex_unlock(&chip->prox_mutex); 745 mutex_unlock(&chip->als_mutex); 746 747 return ret; 748 } 749 750 static int tsl2772_prox_cal(struct iio_dev *indio_dev) 751 { 752 struct tsl2772_chip *chip = iio_priv(indio_dev); 753 int prox_history[MAX_SAMPLES_CAL + 1]; 754 int i, ret, mean, max, sample_sum; 755 756 if (chip->settings.prox_max_samples_cal < 1 || 757 chip->settings.prox_max_samples_cal > MAX_SAMPLES_CAL) 758 return -EINVAL; 759 760 for (i = 0; i < chip->settings.prox_max_samples_cal; i++) { 761 usleep_range(15000, 17500); 762 ret = tsl2772_get_prox(indio_dev); 763 if (ret < 0) 764 return ret; 765 766 prox_history[i] = chip->prox_data; 767 } 768 769 sample_sum = 0; 770 max = INT_MIN; 771 for (i = 0; i < chip->settings.prox_max_samples_cal; i++) { 772 sample_sum += prox_history[i]; 773 max = max(max, prox_history[i]); 774 } 775 mean = sample_sum / chip->settings.prox_max_samples_cal; 776 777 chip->settings.prox_thres_high = (max << 1) - mean; 778 779 return tsl2772_invoke_change(indio_dev); 780 } 781 782 static int tsl2772_read_avail(struct iio_dev *indio_dev, 783 struct iio_chan_spec const *chan, 784 const int **vals, int *type, int *length, 785 long mask) 786 { 787 struct tsl2772_chip *chip = iio_priv(indio_dev); 788 789 switch (mask) { 790 case IIO_CHAN_INFO_CALIBSCALE: 791 if (chan->type == IIO_INTENSITY) { 792 *length = ARRAY_SIZE(tsl2772_int_calibscale_avail); 793 *vals = tsl2772_int_calibscale_avail; 794 } else { 795 *length = ARRAY_SIZE(tsl2772_prox_calibscale_avail); 796 *vals = tsl2772_prox_calibscale_avail; 797 } 798 *type = IIO_VAL_INT; 799 return IIO_AVAIL_LIST; 800 case IIO_CHAN_INFO_INT_TIME: 801 *length = ARRAY_SIZE(tsl2772_int_time_avail[chip->id]); 802 *vals = tsl2772_int_time_avail[chip->id]; 803 *type = IIO_VAL_INT_PLUS_MICRO; 804 return IIO_AVAIL_RANGE; 805 } 806 807 return -EINVAL; 808 } 809 810 static ssize_t in_illuminance0_target_input_show(struct device *dev, 811 struct device_attribute *attr, 812 char *buf) 813 { 814 struct tsl2772_chip *chip = iio_priv(dev_to_iio_dev(dev)); 815 816 return snprintf(buf, PAGE_SIZE, "%d\n", chip->settings.als_cal_target); 817 } 818 819 static ssize_t in_illuminance0_target_input_store(struct device *dev, 820 struct device_attribute *attr, 821 const char *buf, size_t len) 822 { 823 struct iio_dev *indio_dev = dev_to_iio_dev(dev); 824 struct tsl2772_chip *chip = iio_priv(indio_dev); 825 u16 value; 826 int ret; 827 828 if (kstrtou16(buf, 0, &value)) 829 return -EINVAL; 830 831 chip->settings.als_cal_target = value; 832 ret = tsl2772_invoke_change(indio_dev); 833 if (ret < 0) 834 return ret; 835 836 return len; 837 } 838 839 static ssize_t in_illuminance0_calibrate_store(struct device *dev, 840 struct device_attribute *attr, 841 const char *buf, size_t len) 842 { 843 struct iio_dev *indio_dev = dev_to_iio_dev(dev); 844 bool value; 845 int ret; 846 847 if (kstrtobool(buf, &value) || !value) 848 return -EINVAL; 849 850 ret = tsl2772_als_calibrate(indio_dev); 851 if (ret < 0) 852 return ret; 853 854 ret = tsl2772_invoke_change(indio_dev); 855 if (ret < 0) 856 return ret; 857 858 return len; 859 } 860 861 static ssize_t in_illuminance0_lux_table_show(struct device *dev, 862 struct device_attribute *attr, 863 char *buf) 864 { 865 struct tsl2772_chip *chip = iio_priv(dev_to_iio_dev(dev)); 866 int i = 0; 867 int offset = 0; 868 869 while (i < TSL2772_MAX_LUX_TABLE_SIZE) { 870 offset += snprintf(buf + offset, PAGE_SIZE, "%u,%u,", 871 chip->tsl2772_device_lux[i].ch0, 872 chip->tsl2772_device_lux[i].ch1); 873 if (chip->tsl2772_device_lux[i].ch0 == 0) { 874 /* 875 * We just printed the first "0" entry. 876 * Now get rid of the extra "," and break. 877 */ 878 offset--; 879 break; 880 } 881 i++; 882 } 883 884 offset += snprintf(buf + offset, PAGE_SIZE, "\n"); 885 return offset; 886 } 887 888 static ssize_t in_illuminance0_lux_table_store(struct device *dev, 889 struct device_attribute *attr, 890 const char *buf, size_t len) 891 { 892 struct iio_dev *indio_dev = dev_to_iio_dev(dev); 893 struct tsl2772_chip *chip = iio_priv(indio_dev); 894 int value[ARRAY_SIZE(chip->tsl2772_device_lux) * 2 + 1]; 895 int n, ret; 896 897 get_options(buf, ARRAY_SIZE(value), value); 898 899 /* 900 * We now have an array of ints starting at value[1], and 901 * enumerated by value[0]. 902 * We expect each group of two ints to be one table entry, 903 * and the last table entry is all 0. 904 */ 905 n = value[0]; 906 if ((n % 2) || n < 4 || 907 n > ((ARRAY_SIZE(chip->tsl2772_device_lux) - 1) * 2)) 908 return -EINVAL; 909 910 if ((value[(n - 1)] | value[n]) != 0) 911 return -EINVAL; 912 913 if (chip->tsl2772_chip_status == TSL2772_CHIP_WORKING) { 914 ret = tsl2772_chip_off(indio_dev); 915 if (ret < 0) 916 return ret; 917 } 918 919 /* Zero out the table */ 920 memset(chip->tsl2772_device_lux, 0, sizeof(chip->tsl2772_device_lux)); 921 memcpy(chip->tsl2772_device_lux, &value[1], (value[0] * 4)); 922 923 ret = tsl2772_invoke_change(indio_dev); 924 if (ret < 0) 925 return ret; 926 927 return len; 928 } 929 930 static ssize_t in_proximity0_calibrate_store(struct device *dev, 931 struct device_attribute *attr, 932 const char *buf, size_t len) 933 { 934 struct iio_dev *indio_dev = dev_to_iio_dev(dev); 935 bool value; 936 int ret; 937 938 if (kstrtobool(buf, &value) || !value) 939 return -EINVAL; 940 941 ret = tsl2772_prox_cal(indio_dev); 942 if (ret < 0) 943 return ret; 944 945 ret = tsl2772_invoke_change(indio_dev); 946 if (ret < 0) 947 return ret; 948 949 return len; 950 } 951 952 static int tsl2772_read_interrupt_config(struct iio_dev *indio_dev, 953 const struct iio_chan_spec *chan, 954 enum iio_event_type type, 955 enum iio_event_direction dir) 956 { 957 struct tsl2772_chip *chip = iio_priv(indio_dev); 958 959 if (chan->type == IIO_INTENSITY) 960 return chip->settings.als_interrupt_en; 961 else 962 return chip->settings.prox_interrupt_en; 963 } 964 965 static int tsl2772_write_interrupt_config(struct iio_dev *indio_dev, 966 const struct iio_chan_spec *chan, 967 enum iio_event_type type, 968 enum iio_event_direction dir, 969 int val) 970 { 971 struct tsl2772_chip *chip = iio_priv(indio_dev); 972 973 if (chan->type == IIO_INTENSITY) 974 chip->settings.als_interrupt_en = val ? true : false; 975 else 976 chip->settings.prox_interrupt_en = val ? true : false; 977 978 return tsl2772_invoke_change(indio_dev); 979 } 980 981 static int tsl2772_write_event_value(struct iio_dev *indio_dev, 982 const struct iio_chan_spec *chan, 983 enum iio_event_type type, 984 enum iio_event_direction dir, 985 enum iio_event_info info, 986 int val, int val2) 987 { 988 struct tsl2772_chip *chip = iio_priv(indio_dev); 989 int ret = -EINVAL, count, persistence; 990 u8 time; 991 992 switch (info) { 993 case IIO_EV_INFO_VALUE: 994 if (chan->type == IIO_INTENSITY) { 995 switch (dir) { 996 case IIO_EV_DIR_RISING: 997 chip->settings.als_thresh_high = val; 998 ret = 0; 999 break; 1000 case IIO_EV_DIR_FALLING: 1001 chip->settings.als_thresh_low = val; 1002 ret = 0; 1003 break; 1004 default: 1005 break; 1006 } 1007 } else { 1008 switch (dir) { 1009 case IIO_EV_DIR_RISING: 1010 chip->settings.prox_thres_high = val; 1011 ret = 0; 1012 break; 1013 case IIO_EV_DIR_FALLING: 1014 chip->settings.prox_thres_low = val; 1015 ret = 0; 1016 break; 1017 default: 1018 break; 1019 } 1020 } 1021 break; 1022 case IIO_EV_INFO_PERIOD: 1023 if (chan->type == IIO_INTENSITY) 1024 time = chip->settings.als_time; 1025 else 1026 time = chip->settings.prox_time; 1027 1028 count = 256 - time; 1029 persistence = ((val * 1000000) + val2) / 1030 (count * tsl2772_int_time_avail[chip->id][3]); 1031 1032 if (chan->type == IIO_INTENSITY) { 1033 /* ALS filter values are 1, 2, 3, 5, 10, 15, ..., 60 */ 1034 if (persistence > 3) 1035 persistence = (persistence / 5) + 3; 1036 1037 chip->settings.als_persistence = persistence; 1038 } else { 1039 chip->settings.prox_persistence = persistence; 1040 } 1041 1042 ret = 0; 1043 break; 1044 default: 1045 break; 1046 } 1047 1048 if (ret < 0) 1049 return ret; 1050 1051 return tsl2772_invoke_change(indio_dev); 1052 } 1053 1054 static int tsl2772_read_event_value(struct iio_dev *indio_dev, 1055 const struct iio_chan_spec *chan, 1056 enum iio_event_type type, 1057 enum iio_event_direction dir, 1058 enum iio_event_info info, 1059 int *val, int *val2) 1060 { 1061 struct tsl2772_chip *chip = iio_priv(indio_dev); 1062 int filter_delay, persistence; 1063 u8 time; 1064 1065 switch (info) { 1066 case IIO_EV_INFO_VALUE: 1067 if (chan->type == IIO_INTENSITY) { 1068 switch (dir) { 1069 case IIO_EV_DIR_RISING: 1070 *val = chip->settings.als_thresh_high; 1071 return IIO_VAL_INT; 1072 case IIO_EV_DIR_FALLING: 1073 *val = chip->settings.als_thresh_low; 1074 return IIO_VAL_INT; 1075 default: 1076 return -EINVAL; 1077 } 1078 } else { 1079 switch (dir) { 1080 case IIO_EV_DIR_RISING: 1081 *val = chip->settings.prox_thres_high; 1082 return IIO_VAL_INT; 1083 case IIO_EV_DIR_FALLING: 1084 *val = chip->settings.prox_thres_low; 1085 return IIO_VAL_INT; 1086 default: 1087 return -EINVAL; 1088 } 1089 } 1090 break; 1091 case IIO_EV_INFO_PERIOD: 1092 if (chan->type == IIO_INTENSITY) { 1093 time = chip->settings.als_time; 1094 persistence = chip->settings.als_persistence; 1095 1096 /* ALS filter values are 1, 2, 3, 5, 10, 15, ..., 60 */ 1097 if (persistence > 3) 1098 persistence = (persistence - 3) * 5; 1099 } else { 1100 time = chip->settings.prox_time; 1101 persistence = chip->settings.prox_persistence; 1102 } 1103 1104 filter_delay = persistence * (256 - time) * 1105 tsl2772_int_time_avail[chip->id][3]; 1106 1107 *val = filter_delay / 1000000; 1108 *val2 = filter_delay % 1000000; 1109 return IIO_VAL_INT_PLUS_MICRO; 1110 default: 1111 return -EINVAL; 1112 } 1113 } 1114 1115 static int tsl2772_read_raw(struct iio_dev *indio_dev, 1116 struct iio_chan_spec const *chan, 1117 int *val, 1118 int *val2, 1119 long mask) 1120 { 1121 struct tsl2772_chip *chip = iio_priv(indio_dev); 1122 1123 switch (mask) { 1124 case IIO_CHAN_INFO_PROCESSED: 1125 switch (chan->type) { 1126 case IIO_LIGHT: 1127 tsl2772_get_lux(indio_dev); 1128 *val = chip->als_cur_info.lux; 1129 return IIO_VAL_INT; 1130 default: 1131 return -EINVAL; 1132 } 1133 case IIO_CHAN_INFO_RAW: 1134 switch (chan->type) { 1135 case IIO_INTENSITY: 1136 tsl2772_get_lux(indio_dev); 1137 if (chan->channel == 0) 1138 *val = chip->als_cur_info.als_ch0; 1139 else 1140 *val = chip->als_cur_info.als_ch1; 1141 return IIO_VAL_INT; 1142 case IIO_PROXIMITY: 1143 tsl2772_get_prox(indio_dev); 1144 *val = chip->prox_data; 1145 return IIO_VAL_INT; 1146 default: 1147 return -EINVAL; 1148 } 1149 break; 1150 case IIO_CHAN_INFO_CALIBSCALE: 1151 if (chan->type == IIO_LIGHT) 1152 *val = tsl2772_als_gain[chip->settings.als_gain]; 1153 else 1154 *val = tsl2772_prox_gain[chip->settings.prox_gain]; 1155 return IIO_VAL_INT; 1156 case IIO_CHAN_INFO_CALIBBIAS: 1157 *val = chip->settings.als_gain_trim; 1158 return IIO_VAL_INT; 1159 case IIO_CHAN_INFO_INT_TIME: 1160 *val = 0; 1161 *val2 = (256 - chip->settings.als_time) * 1162 tsl2772_int_time_avail[chip->id][3]; 1163 return IIO_VAL_INT_PLUS_MICRO; 1164 default: 1165 return -EINVAL; 1166 } 1167 } 1168 1169 static int tsl2772_write_raw(struct iio_dev *indio_dev, 1170 struct iio_chan_spec const *chan, 1171 int val, 1172 int val2, 1173 long mask) 1174 { 1175 struct tsl2772_chip *chip = iio_priv(indio_dev); 1176 1177 switch (mask) { 1178 case IIO_CHAN_INFO_CALIBSCALE: 1179 if (chan->type == IIO_INTENSITY) { 1180 switch (val) { 1181 case 1: 1182 chip->settings.als_gain = 0; 1183 break; 1184 case 8: 1185 chip->settings.als_gain = 1; 1186 break; 1187 case 16: 1188 chip->settings.als_gain = 2; 1189 break; 1190 case 120: 1191 chip->settings.als_gain = 3; 1192 break; 1193 default: 1194 return -EINVAL; 1195 } 1196 } else { 1197 switch (val) { 1198 case 1: 1199 chip->settings.prox_gain = 0; 1200 break; 1201 case 2: 1202 chip->settings.prox_gain = 1; 1203 break; 1204 case 4: 1205 chip->settings.prox_gain = 2; 1206 break; 1207 case 8: 1208 chip->settings.prox_gain = 3; 1209 break; 1210 default: 1211 return -EINVAL; 1212 } 1213 } 1214 break; 1215 case IIO_CHAN_INFO_CALIBBIAS: 1216 if (val < TSL2772_ALS_GAIN_TRIM_MIN || 1217 val > TSL2772_ALS_GAIN_TRIM_MAX) 1218 return -EINVAL; 1219 1220 chip->settings.als_gain_trim = val; 1221 break; 1222 case IIO_CHAN_INFO_INT_TIME: 1223 if (val != 0 || val2 < tsl2772_int_time_avail[chip->id][1] || 1224 val2 > tsl2772_int_time_avail[chip->id][5]) 1225 return -EINVAL; 1226 1227 chip->settings.als_time = 256 - 1228 (val2 / tsl2772_int_time_avail[chip->id][3]); 1229 break; 1230 default: 1231 return -EINVAL; 1232 } 1233 1234 return tsl2772_invoke_change(indio_dev); 1235 } 1236 1237 static DEVICE_ATTR_RW(in_illuminance0_target_input); 1238 1239 static DEVICE_ATTR_WO(in_illuminance0_calibrate); 1240 1241 static DEVICE_ATTR_WO(in_proximity0_calibrate); 1242 1243 static DEVICE_ATTR_RW(in_illuminance0_lux_table); 1244 1245 /* Use the default register values to identify the Taos device */ 1246 static int tsl2772_device_id_verif(int id, int target) 1247 { 1248 switch (target) { 1249 case tsl2571: 1250 case tsl2671: 1251 case tsl2771: 1252 return (id & 0xf0) == TRITON_ID; 1253 case tmd2671: 1254 case tmd2771: 1255 return (id & 0xf0) == HALIBUT_ID; 1256 case tsl2572: 1257 case tsl2672: 1258 case tmd2672: 1259 case tsl2772: 1260 case tmd2772: 1261 return (id & 0xf0) == SWORDFISH_ID; 1262 } 1263 1264 return -EINVAL; 1265 } 1266 1267 static irqreturn_t tsl2772_event_handler(int irq, void *private) 1268 { 1269 struct iio_dev *indio_dev = private; 1270 struct tsl2772_chip *chip = iio_priv(indio_dev); 1271 s64 timestamp = iio_get_time_ns(indio_dev); 1272 int ret; 1273 1274 ret = tsl2772_read_status(chip); 1275 if (ret < 0) 1276 return IRQ_HANDLED; 1277 1278 /* What type of interrupt do we need to process */ 1279 if (ret & TSL2772_STA_PRX_INTR) { 1280 iio_push_event(indio_dev, 1281 IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 1282 0, 1283 IIO_EV_TYPE_THRESH, 1284 IIO_EV_DIR_EITHER), 1285 timestamp); 1286 } 1287 1288 if (ret & TSL2772_STA_ALS_INTR) { 1289 iio_push_event(indio_dev, 1290 IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 1291 0, 1292 IIO_EV_TYPE_THRESH, 1293 IIO_EV_DIR_EITHER), 1294 timestamp); 1295 } 1296 1297 ret = i2c_smbus_write_byte(chip->client, 1298 TSL2772_CMD_REG | TSL2772_CMD_SPL_FN | 1299 TSL2772_CMD_PROXALS_INT_CLR); 1300 if (ret < 0) 1301 dev_err(&chip->client->dev, 1302 "%s: failed to clear interrupt status: %d\n", 1303 __func__, ret); 1304 1305 return IRQ_HANDLED; 1306 } 1307 1308 static struct attribute *tsl2772_ALS_device_attrs[] = { 1309 &dev_attr_in_illuminance0_target_input.attr, 1310 &dev_attr_in_illuminance0_calibrate.attr, 1311 &dev_attr_in_illuminance0_lux_table.attr, 1312 NULL 1313 }; 1314 1315 static struct attribute *tsl2772_PRX_device_attrs[] = { 1316 &dev_attr_in_proximity0_calibrate.attr, 1317 NULL 1318 }; 1319 1320 static struct attribute *tsl2772_ALSPRX_device_attrs[] = { 1321 &dev_attr_in_illuminance0_target_input.attr, 1322 &dev_attr_in_illuminance0_calibrate.attr, 1323 &dev_attr_in_illuminance0_lux_table.attr, 1324 NULL 1325 }; 1326 1327 static struct attribute *tsl2772_PRX2_device_attrs[] = { 1328 &dev_attr_in_proximity0_calibrate.attr, 1329 NULL 1330 }; 1331 1332 static struct attribute *tsl2772_ALSPRX2_device_attrs[] = { 1333 &dev_attr_in_illuminance0_target_input.attr, 1334 &dev_attr_in_illuminance0_calibrate.attr, 1335 &dev_attr_in_illuminance0_lux_table.attr, 1336 &dev_attr_in_proximity0_calibrate.attr, 1337 NULL 1338 }; 1339 1340 static const struct attribute_group tsl2772_device_attr_group_tbl[] = { 1341 [ALS] = { 1342 .attrs = tsl2772_ALS_device_attrs, 1343 }, 1344 [PRX] = { 1345 .attrs = tsl2772_PRX_device_attrs, 1346 }, 1347 [ALSPRX] = { 1348 .attrs = tsl2772_ALSPRX_device_attrs, 1349 }, 1350 [PRX2] = { 1351 .attrs = tsl2772_PRX2_device_attrs, 1352 }, 1353 [ALSPRX2] = { 1354 .attrs = tsl2772_ALSPRX2_device_attrs, 1355 }, 1356 }; 1357 1358 #define TSL2772_DEVICE_INFO(type)[type] = \ 1359 { \ 1360 .attrs = &tsl2772_device_attr_group_tbl[type], \ 1361 .read_raw = &tsl2772_read_raw, \ 1362 .read_avail = &tsl2772_read_avail, \ 1363 .write_raw = &tsl2772_write_raw, \ 1364 .read_event_value = &tsl2772_read_event_value, \ 1365 .write_event_value = &tsl2772_write_event_value, \ 1366 .read_event_config = &tsl2772_read_interrupt_config, \ 1367 .write_event_config = &tsl2772_write_interrupt_config, \ 1368 } 1369 1370 static const struct iio_info tsl2772_device_info[] = { 1371 TSL2772_DEVICE_INFO(ALS), 1372 TSL2772_DEVICE_INFO(PRX), 1373 TSL2772_DEVICE_INFO(ALSPRX), 1374 TSL2772_DEVICE_INFO(PRX2), 1375 TSL2772_DEVICE_INFO(ALSPRX2), 1376 }; 1377 1378 static const struct iio_event_spec tsl2772_events[] = { 1379 { 1380 .type = IIO_EV_TYPE_THRESH, 1381 .dir = IIO_EV_DIR_RISING, 1382 .mask_separate = BIT(IIO_EV_INFO_VALUE), 1383 }, { 1384 .type = IIO_EV_TYPE_THRESH, 1385 .dir = IIO_EV_DIR_FALLING, 1386 .mask_separate = BIT(IIO_EV_INFO_VALUE), 1387 }, { 1388 .type = IIO_EV_TYPE_THRESH, 1389 .dir = IIO_EV_DIR_EITHER, 1390 .mask_separate = BIT(IIO_EV_INFO_PERIOD) | 1391 BIT(IIO_EV_INFO_ENABLE), 1392 }, 1393 }; 1394 1395 static const struct tsl2772_chip_info tsl2772_chip_info_tbl[] = { 1396 [ALS] = { 1397 .channel_with_events = { 1398 { 1399 .type = IIO_LIGHT, 1400 .indexed = 1, 1401 .channel = 0, 1402 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1403 }, { 1404 .type = IIO_INTENSITY, 1405 .indexed = 1, 1406 .channel = 0, 1407 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1408 BIT(IIO_CHAN_INFO_INT_TIME) | 1409 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1410 BIT(IIO_CHAN_INFO_CALIBBIAS), 1411 .info_mask_separate_available = 1412 BIT(IIO_CHAN_INFO_INT_TIME) | 1413 BIT(IIO_CHAN_INFO_CALIBSCALE), 1414 .event_spec = tsl2772_events, 1415 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1416 }, { 1417 .type = IIO_INTENSITY, 1418 .indexed = 1, 1419 .channel = 1, 1420 }, 1421 }, 1422 .channel_without_events = { 1423 { 1424 .type = IIO_LIGHT, 1425 .indexed = 1, 1426 .channel = 0, 1427 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1428 }, { 1429 .type = IIO_INTENSITY, 1430 .indexed = 1, 1431 .channel = 0, 1432 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1433 BIT(IIO_CHAN_INFO_INT_TIME) | 1434 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1435 BIT(IIO_CHAN_INFO_CALIBBIAS), 1436 .info_mask_separate_available = 1437 BIT(IIO_CHAN_INFO_INT_TIME) | 1438 BIT(IIO_CHAN_INFO_CALIBSCALE), 1439 }, { 1440 .type = IIO_INTENSITY, 1441 .indexed = 1, 1442 .channel = 1, 1443 }, 1444 }, 1445 .chan_table_elements = 3, 1446 .info = &tsl2772_device_info[ALS], 1447 }, 1448 [PRX] = { 1449 .channel_with_events = { 1450 { 1451 .type = IIO_PROXIMITY, 1452 .indexed = 1, 1453 .channel = 0, 1454 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1455 .event_spec = tsl2772_events, 1456 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1457 }, 1458 }, 1459 .channel_without_events = { 1460 { 1461 .type = IIO_PROXIMITY, 1462 .indexed = 1, 1463 .channel = 0, 1464 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1465 }, 1466 }, 1467 .chan_table_elements = 1, 1468 .info = &tsl2772_device_info[PRX], 1469 }, 1470 [ALSPRX] = { 1471 .channel_with_events = { 1472 { 1473 .type = IIO_LIGHT, 1474 .indexed = 1, 1475 .channel = 0, 1476 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1477 }, { 1478 .type = IIO_INTENSITY, 1479 .indexed = 1, 1480 .channel = 0, 1481 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1482 BIT(IIO_CHAN_INFO_INT_TIME) | 1483 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1484 BIT(IIO_CHAN_INFO_CALIBBIAS), 1485 .info_mask_separate_available = 1486 BIT(IIO_CHAN_INFO_INT_TIME) | 1487 BIT(IIO_CHAN_INFO_CALIBSCALE), 1488 .event_spec = tsl2772_events, 1489 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1490 }, { 1491 .type = IIO_INTENSITY, 1492 .indexed = 1, 1493 .channel = 1, 1494 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1495 }, { 1496 .type = IIO_PROXIMITY, 1497 .indexed = 1, 1498 .channel = 0, 1499 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1500 .event_spec = tsl2772_events, 1501 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1502 }, 1503 }, 1504 .channel_without_events = { 1505 { 1506 .type = IIO_LIGHT, 1507 .indexed = 1, 1508 .channel = 0, 1509 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1510 }, { 1511 .type = IIO_INTENSITY, 1512 .indexed = 1, 1513 .channel = 0, 1514 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1515 BIT(IIO_CHAN_INFO_INT_TIME) | 1516 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1517 BIT(IIO_CHAN_INFO_CALIBBIAS), 1518 .info_mask_separate_available = 1519 BIT(IIO_CHAN_INFO_INT_TIME) | 1520 BIT(IIO_CHAN_INFO_CALIBSCALE), 1521 }, { 1522 .type = IIO_INTENSITY, 1523 .indexed = 1, 1524 .channel = 1, 1525 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1526 }, { 1527 .type = IIO_PROXIMITY, 1528 .indexed = 1, 1529 .channel = 0, 1530 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1531 }, 1532 }, 1533 .chan_table_elements = 4, 1534 .info = &tsl2772_device_info[ALSPRX], 1535 }, 1536 [PRX2] = { 1537 .channel_with_events = { 1538 { 1539 .type = IIO_PROXIMITY, 1540 .indexed = 1, 1541 .channel = 0, 1542 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1543 BIT(IIO_CHAN_INFO_CALIBSCALE), 1544 .info_mask_separate_available = 1545 BIT(IIO_CHAN_INFO_CALIBSCALE), 1546 .event_spec = tsl2772_events, 1547 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1548 }, 1549 }, 1550 .channel_without_events = { 1551 { 1552 .type = IIO_PROXIMITY, 1553 .indexed = 1, 1554 .channel = 0, 1555 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1556 BIT(IIO_CHAN_INFO_CALIBSCALE), 1557 .info_mask_separate_available = 1558 BIT(IIO_CHAN_INFO_CALIBSCALE), 1559 }, 1560 }, 1561 .chan_table_elements = 1, 1562 .info = &tsl2772_device_info[PRX2], 1563 }, 1564 [ALSPRX2] = { 1565 .channel_with_events = { 1566 { 1567 .type = IIO_LIGHT, 1568 .indexed = 1, 1569 .channel = 0, 1570 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1571 }, { 1572 .type = IIO_INTENSITY, 1573 .indexed = 1, 1574 .channel = 0, 1575 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1576 BIT(IIO_CHAN_INFO_INT_TIME) | 1577 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1578 BIT(IIO_CHAN_INFO_CALIBBIAS), 1579 .info_mask_separate_available = 1580 BIT(IIO_CHAN_INFO_INT_TIME) | 1581 BIT(IIO_CHAN_INFO_CALIBSCALE), 1582 .event_spec = tsl2772_events, 1583 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1584 }, { 1585 .type = IIO_INTENSITY, 1586 .indexed = 1, 1587 .channel = 1, 1588 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1589 }, { 1590 .type = IIO_PROXIMITY, 1591 .indexed = 1, 1592 .channel = 0, 1593 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1594 BIT(IIO_CHAN_INFO_CALIBSCALE), 1595 .info_mask_separate_available = 1596 BIT(IIO_CHAN_INFO_CALIBSCALE), 1597 .event_spec = tsl2772_events, 1598 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1599 }, 1600 }, 1601 .channel_without_events = { 1602 { 1603 .type = IIO_LIGHT, 1604 .indexed = 1, 1605 .channel = 0, 1606 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1607 }, { 1608 .type = IIO_INTENSITY, 1609 .indexed = 1, 1610 .channel = 0, 1611 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1612 BIT(IIO_CHAN_INFO_INT_TIME) | 1613 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1614 BIT(IIO_CHAN_INFO_CALIBBIAS), 1615 .info_mask_separate_available = 1616 BIT(IIO_CHAN_INFO_INT_TIME) | 1617 BIT(IIO_CHAN_INFO_CALIBSCALE), 1618 }, { 1619 .type = IIO_INTENSITY, 1620 .indexed = 1, 1621 .channel = 1, 1622 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1623 }, { 1624 .type = IIO_PROXIMITY, 1625 .indexed = 1, 1626 .channel = 0, 1627 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1628 BIT(IIO_CHAN_INFO_CALIBSCALE), 1629 .info_mask_separate_available = 1630 BIT(IIO_CHAN_INFO_CALIBSCALE), 1631 }, 1632 }, 1633 .chan_table_elements = 4, 1634 .info = &tsl2772_device_info[ALSPRX2], 1635 }, 1636 }; 1637 1638 static int tsl2772_probe(struct i2c_client *clientp, 1639 const struct i2c_device_id *id) 1640 { 1641 struct iio_dev *indio_dev; 1642 struct tsl2772_chip *chip; 1643 int ret; 1644 1645 indio_dev = devm_iio_device_alloc(&clientp->dev, sizeof(*chip)); 1646 if (!indio_dev) 1647 return -ENOMEM; 1648 1649 chip = iio_priv(indio_dev); 1650 chip->client = clientp; 1651 i2c_set_clientdata(clientp, indio_dev); 1652 1653 ret = i2c_smbus_read_byte_data(chip->client, 1654 TSL2772_CMD_REG | TSL2772_CHIPID); 1655 if (ret < 0) 1656 return ret; 1657 1658 if (tsl2772_device_id_verif(ret, id->driver_data) <= 0) { 1659 dev_info(&chip->client->dev, 1660 "%s: i2c device found does not match expected id\n", 1661 __func__); 1662 return -EINVAL; 1663 } 1664 1665 ret = i2c_smbus_write_byte(clientp, TSL2772_CMD_REG | TSL2772_CNTRL); 1666 if (ret < 0) { 1667 dev_err(&clientp->dev, 1668 "%s: Failed to write to CMD register: %d\n", 1669 __func__, ret); 1670 return ret; 1671 } 1672 1673 mutex_init(&chip->als_mutex); 1674 mutex_init(&chip->prox_mutex); 1675 1676 chip->tsl2772_chip_status = TSL2772_CHIP_UNKNOWN; 1677 chip->pdata = dev_get_platdata(&clientp->dev); 1678 chip->id = id->driver_data; 1679 chip->chip_info = 1680 &tsl2772_chip_info_tbl[device_channel_config[id->driver_data]]; 1681 1682 indio_dev->info = chip->chip_info->info; 1683 indio_dev->dev.parent = &clientp->dev; 1684 indio_dev->modes = INDIO_DIRECT_MODE; 1685 indio_dev->name = chip->client->name; 1686 indio_dev->num_channels = chip->chip_info->chan_table_elements; 1687 1688 if (clientp->irq) { 1689 indio_dev->channels = chip->chip_info->channel_with_events; 1690 1691 ret = devm_request_threaded_irq(&clientp->dev, clientp->irq, 1692 NULL, 1693 &tsl2772_event_handler, 1694 IRQF_TRIGGER_FALLING | 1695 IRQF_ONESHOT, 1696 "TSL2772_event", 1697 indio_dev); 1698 if (ret) { 1699 dev_err(&clientp->dev, 1700 "%s: irq request failed\n", __func__); 1701 return ret; 1702 } 1703 } else { 1704 indio_dev->channels = chip->chip_info->channel_without_events; 1705 } 1706 1707 tsl2772_defaults(chip); 1708 ret = tsl2772_chip_on(indio_dev); 1709 if (ret < 0) 1710 return ret; 1711 1712 ret = iio_device_register(indio_dev); 1713 if (ret) { 1714 tsl2772_chip_off(indio_dev); 1715 dev_err(&clientp->dev, 1716 "%s: iio registration failed\n", __func__); 1717 return ret; 1718 } 1719 1720 return 0; 1721 } 1722 1723 static int tsl2772_suspend(struct device *dev) 1724 { 1725 struct iio_dev *indio_dev = dev_get_drvdata(dev); 1726 1727 return tsl2772_chip_off(indio_dev); 1728 } 1729 1730 static int tsl2772_resume(struct device *dev) 1731 { 1732 struct iio_dev *indio_dev = dev_get_drvdata(dev); 1733 1734 return tsl2772_chip_on(indio_dev); 1735 } 1736 1737 static int tsl2772_remove(struct i2c_client *client) 1738 { 1739 struct iio_dev *indio_dev = i2c_get_clientdata(client); 1740 1741 tsl2772_chip_off(indio_dev); 1742 1743 iio_device_unregister(indio_dev); 1744 1745 return 0; 1746 } 1747 1748 static const struct i2c_device_id tsl2772_idtable[] = { 1749 { "tsl2571", tsl2571 }, 1750 { "tsl2671", tsl2671 }, 1751 { "tmd2671", tmd2671 }, 1752 { "tsl2771", tsl2771 }, 1753 { "tmd2771", tmd2771 }, 1754 { "tsl2572", tsl2572 }, 1755 { "tsl2672", tsl2672 }, 1756 { "tmd2672", tmd2672 }, 1757 { "tsl2772", tsl2772 }, 1758 { "tmd2772", tmd2772 }, 1759 {} 1760 }; 1761 1762 MODULE_DEVICE_TABLE(i2c, tsl2772_idtable); 1763 1764 static const struct of_device_id tsl2772_of_match[] = { 1765 { .compatible = "amstaos,tsl2571" }, 1766 { .compatible = "amstaos,tsl2671" }, 1767 { .compatible = "amstaos,tmd2671" }, 1768 { .compatible = "amstaos,tsl2771" }, 1769 { .compatible = "amstaos,tmd2771" }, 1770 { .compatible = "amstaos,tsl2572" }, 1771 { .compatible = "amstaos,tsl2672" }, 1772 { .compatible = "amstaos,tmd2672" }, 1773 { .compatible = "amstaos,tsl2772" }, 1774 { .compatible = "amstaos,tmd2772" }, 1775 {} 1776 }; 1777 MODULE_DEVICE_TABLE(of, tsl2772_of_match); 1778 1779 static const struct dev_pm_ops tsl2772_pm_ops = { 1780 .suspend = tsl2772_suspend, 1781 .resume = tsl2772_resume, 1782 }; 1783 1784 static struct i2c_driver tsl2772_driver = { 1785 .driver = { 1786 .name = "tsl2772", 1787 .of_match_table = tsl2772_of_match, 1788 .pm = &tsl2772_pm_ops, 1789 }, 1790 .id_table = tsl2772_idtable, 1791 .probe = tsl2772_probe, 1792 .remove = tsl2772_remove, 1793 }; 1794 1795 module_i2c_driver(tsl2772_driver); 1796 1797 MODULE_AUTHOR("J. August Brenner <Jon.Brenner@ams.com>"); 1798 MODULE_AUTHOR("Brian Masney <masneyb@onstation.org>"); 1799 MODULE_DESCRIPTION("TAOS tsl2772 ambient and proximity light sensor driver"); 1800 MODULE_LICENSE("GPL"); 1801