Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 | /*
* Device driver for monitoring ambient light intensity in (lux)
* and proximity detection (prox) within the TAOS TSL2X7X family of devices.
*
* Copyright (c) 2012, TAOS Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <linux/kernel.h>
#include <linux/i2c.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/iio/events.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include "tsl2x7x.h"
/* Cal defs*/
#define PROX_STAT_CAL 0
#define PROX_STAT_SAMP 1
#define MAX_SAMPLES_CAL 200
/* TSL2X7X Device ID */
#define TRITON_ID 0x00
#define SWORDFISH_ID 0x30
#define HALIBUT_ID 0x20
/* Lux calculation constants */
#define TSL2X7X_LUX_CALC_OVER_FLOW 65535
/* TAOS Register definitions - note:
* depending on device, some of these register are not used and the
* register address is benign.
*/
/* 2X7X register offsets */
#define TSL2X7X_MAX_CONFIG_REG 16
/* Device Registers and Masks */
#define TSL2X7X_CNTRL 0x00
#define TSL2X7X_ALS_TIME 0X01
#define TSL2X7X_PRX_TIME 0x02
#define TSL2X7X_WAIT_TIME 0x03
#define TSL2X7X_ALS_MINTHRESHLO 0X04
#define TSL2X7X_ALS_MINTHRESHHI 0X05
#define TSL2X7X_ALS_MAXTHRESHLO 0X06
#define TSL2X7X_ALS_MAXTHRESHHI 0X07
#define TSL2X7X_PRX_MINTHRESHLO 0X08
#define TSL2X7X_PRX_MINTHRESHHI 0X09
#define TSL2X7X_PRX_MAXTHRESHLO 0X0A
#define TSL2X7X_PRX_MAXTHRESHHI 0X0B
#define TSL2X7X_PERSISTENCE 0x0C
#define TSL2X7X_PRX_CONFIG 0x0D
#define TSL2X7X_PRX_COUNT 0x0E
#define TSL2X7X_GAIN 0x0F
#define TSL2X7X_NOTUSED 0x10
#define TSL2X7X_REVID 0x11
#define TSL2X7X_CHIPID 0x12
#define TSL2X7X_STATUS 0x13
#define TSL2X7X_ALS_CHAN0LO 0x14
#define TSL2X7X_ALS_CHAN0HI 0x15
#define TSL2X7X_ALS_CHAN1LO 0x16
#define TSL2X7X_ALS_CHAN1HI 0x17
#define TSL2X7X_PRX_LO 0x18
#define TSL2X7X_PRX_HI 0x19
/* tsl2X7X cmd reg masks */
#define TSL2X7X_CMD_REG 0x80
#define TSL2X7X_CMD_SPL_FN 0x60
#define TSL2X7X_CMD_PROX_INT_CLR 0X05
#define TSL2X7X_CMD_ALS_INT_CLR 0x06
#define TSL2X7X_CMD_PROXALS_INT_CLR 0X07
/* tsl2X7X cntrl reg masks */
#define TSL2X7X_CNTL_ADC_ENBL 0x02
#define TSL2X7X_CNTL_PWR_ON 0x01
/* tsl2X7X status reg masks */
#define TSL2X7X_STA_ADC_VALID 0x01
#define TSL2X7X_STA_PRX_VALID 0x02
#define TSL2X7X_STA_ADC_PRX_VALID (TSL2X7X_STA_ADC_VALID |\
TSL2X7X_STA_PRX_VALID)
#define TSL2X7X_STA_ALS_INTR 0x10
#define TSL2X7X_STA_PRX_INTR 0x20
/* tsl2X7X cntrl reg masks */
#define TSL2X7X_CNTL_REG_CLEAR 0x00
#define TSL2X7X_CNTL_PROX_INT_ENBL 0X20
#define TSL2X7X_CNTL_ALS_INT_ENBL 0X10
#define TSL2X7X_CNTL_WAIT_TMR_ENBL 0X08
#define TSL2X7X_CNTL_PROX_DET_ENBL 0X04
#define TSL2X7X_CNTL_PWRON 0x01
#define TSL2X7X_CNTL_ALSPON_ENBL 0x03
#define TSL2X7X_CNTL_INTALSPON_ENBL 0x13
#define TSL2X7X_CNTL_PROXPON_ENBL 0x0F
#define TSL2X7X_CNTL_INTPROXPON_ENBL 0x2F
/*Prox diode to use */
#define TSL2X7X_DIODE0 0x10
#define TSL2X7X_DIODE1 0x20
#define TSL2X7X_DIODE_BOTH 0x30
/* LED Power */
#define TSL2X7X_mA100 0x00
#define TSL2X7X_mA50 0x40
#define TSL2X7X_mA25 0x80
#define TSL2X7X_mA13 0xD0
#define TSL2X7X_MAX_TIMER_CNT (0xFF)
/*Common device IIO EventMask */
#define TSL2X7X_EVENT_MASK \
(IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) | \
IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING)),
#define TSL2X7X_MIN_ITIME 3
/* TAOS txx2x7x Device family members */
enum {
tsl2571,
tsl2671,
tmd2671,
tsl2771,
tmd2771,
tsl2572,
tsl2672,
tmd2672,
tsl2772,
tmd2772
};
enum {
TSL2X7X_CHIP_UNKNOWN = 0,
TSL2X7X_CHIP_WORKING = 1,
TSL2X7X_CHIP_SUSPENDED = 2
};
struct tsl2x7x_parse_result {
int integer;
int fract;
};
/* Per-device data */
struct tsl2x7x_als_info {
u16 als_ch0;
u16 als_ch1;
u16 lux;
};
struct tsl2x7x_prox_stat {
int min;
int max;
int mean;
unsigned long stddev;
};
struct tsl2x7x_chip_info {
int chan_table_elements;
struct iio_chan_spec channel[4];
const struct iio_info *info;
};
struct tsl2X7X_chip {
kernel_ulong_t id;
struct mutex prox_mutex;
struct mutex als_mutex;
struct i2c_client *client;
u16 prox_data;
struct tsl2x7x_als_info als_cur_info;
struct tsl2x7x_settings tsl2x7x_settings;
struct tsl2X7X_platform_data *pdata;
int als_time_scale;
int als_saturation;
int tsl2x7x_chip_status;
u8 tsl2x7x_config[TSL2X7X_MAX_CONFIG_REG];
const struct tsl2x7x_chip_info *chip_info;
const struct iio_info *info;
s64 event_timestamp;
/* This structure is intentionally large to accommodate
* updates via sysfs. */
/* Sized to 9 = max 8 segments + 1 termination segment */
struct tsl2x7x_lux tsl2x7x_device_lux[TSL2X7X_MAX_LUX_TABLE_SIZE];
};
/* Different devices require different coefficents */
static const struct tsl2x7x_lux tsl2x71_lux_table[] = {
{ 14461, 611, 1211 },
{ 18540, 352, 623 },
{ 0, 0, 0 },
};
static const struct tsl2x7x_lux tmd2x71_lux_table[] = {
{ 11635, 115, 256 },
{ 15536, 87, 179 },
{ 0, 0, 0 },
};
static const struct tsl2x7x_lux tsl2x72_lux_table[] = {
{ 14013, 466, 917 },
{ 18222, 310, 552 },
{ 0, 0, 0 },
};
static const struct tsl2x7x_lux tmd2x72_lux_table[] = {
{ 13218, 130, 262 },
{ 17592, 92, 169 },
{ 0, 0, 0 },
};
static const struct tsl2x7x_lux *tsl2x7x_default_lux_table_group[] = {
[tsl2571] = tsl2x71_lux_table,
[tsl2671] = tsl2x71_lux_table,
[tmd2671] = tmd2x71_lux_table,
[tsl2771] = tsl2x71_lux_table,
[tmd2771] = tmd2x71_lux_table,
[tsl2572] = tsl2x72_lux_table,
[tsl2672] = tsl2x72_lux_table,
[tmd2672] = tmd2x72_lux_table,
[tsl2772] = tsl2x72_lux_table,
[tmd2772] = tmd2x72_lux_table,
};
static const struct tsl2x7x_settings tsl2x7x_default_settings = {
.als_time = 219, /* 101 ms */
.als_gain = 0,
.prx_time = 254, /* 5.4 ms */
.prox_gain = 1,
.wait_time = 245,
.prox_config = 0,
.als_gain_trim = 1000,
.als_cal_target = 150,
.als_thresh_low = 200,
.als_thresh_high = 256,
.persistence = 255,
.interrupts_en = 0,
.prox_thres_low = 0,
.prox_thres_high = 512,
.prox_max_samples_cal = 30,
.prox_pulse_count = 8
};
static const s16 tsl2X7X_als_gainadj[] = {
1,
8,
16,
120
};
static const s16 tsl2X7X_prx_gainadj[] = {
1,
2,
4,
8
};
/* Channel variations */
enum {
ALS,
PRX,
ALSPRX,
PRX2,
ALSPRX2,
};
static const u8 device_channel_config[] = {
ALS,
PRX,
PRX,
ALSPRX,
ALSPRX,
ALS,
PRX2,
PRX2,
ALSPRX2,
ALSPRX2
};
/**
* tsl2x7x_parse_buffer() - parse a decimal result from a buffer.
* @*buf: pointer to char buffer to parse
* @*result: pointer to buffer to contain
* resulting interger / decimal as ints.
*
*/
static int
tsl2x7x_parse_buffer(const char *buf, struct tsl2x7x_parse_result *result)
{
int integer = 0, fract = 0, fract_mult = 100000;
bool integer_part = true, negative = false;
if (buf[0] == '-') {
negative = true;
buf++;
}
while (*buf) {
if ('0' <= *buf && *buf <= '9') {
if (integer_part)
integer = integer*10 + *buf - '0';
else {
fract += fract_mult*(*buf - '0');
if (fract_mult == 1)
break;
fract_mult /= 10;
}
} else if (*buf == '\n') {
if (*(buf + 1) == '\0')
break;
else
return -EINVAL;
} else if (*buf == '.') {
integer_part = false;
} else {
return -EINVAL;
}
buf++;
}
if (negative) {
if (integer)
integer = -integer;
else
fract = -fract;
}
result->integer = integer;
result->fract = fract;
return 0;
}
/**
* tsl2x7x_i2c_read() - Read a byte from a register.
* @client: i2c client
* @reg: device register to read from
* @*val: pointer to location to store register contents.
*
*/
static int
tsl2x7x_i2c_read(struct i2c_client *client, u8 reg, u8 *val)
{
int ret = 0;
/* select register to write */
ret = i2c_smbus_write_byte(client, (TSL2X7X_CMD_REG | reg));
if (ret < 0) {
dev_err(&client->dev, "%s: failed to write register %x\n"
, __func__, reg);
return ret;
}
/* read the data */
ret = i2c_smbus_read_byte(client);
if (ret >= 0)
*val = (u8)ret;
else
dev_err(&client->dev, "%s: failed to read register %x\n"
, __func__, reg);
return ret;
}
/**
* tsl2x7x_get_lux() - Reads and calculates current lux value.
* @indio_dev: pointer to IIO device
*
* The raw ch0 and ch1 values of the ambient light sensed in the last
* integration cycle are read from the device.
* Time scale factor array values are adjusted based on the integration time.
* The raw values are multiplied by a scale factor, and device gain is obtained
* using gain index. Limit checks are done next, then the ratio of a multiple
* of ch1 value, to the ch0 value, is calculated. Array tsl2x7x_device_lux[]
* is then scanned to find the first ratio value that is just above the ratio
* we just calculated. The ch0 and ch1 multiplier constants in the array are
* then used along with the time scale factor array values, to calculate the
* lux.
*/
static int tsl2x7x_get_lux(struct iio_dev *indio_dev)
{
u16 ch0, ch1; /* separated ch0/ch1 data from device */
u32 lux; /* raw lux calculated from device data */
u64 lux64;
u32 ratio;
u8 buf[4];
struct tsl2x7x_lux *p;
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
int i, ret;
u32 ch0lux = 0;
u32 ch1lux = 0;
if (mutex_trylock(&chip->als_mutex) == 0)
return chip->als_cur_info.lux; /* busy, so return LAST VALUE */
if (chip->tsl2x7x_chip_status != TSL2X7X_CHIP_WORKING) {
/* device is not enabled */
dev_err(&chip->client->dev, "%s: device is not enabled\n",
__func__);
ret = -EBUSY ;
goto out_unlock;
}
ret = tsl2x7x_i2c_read(chip->client,
(TSL2X7X_CMD_REG | TSL2X7X_STATUS), &buf[0]);
if (ret < 0) {
dev_err(&chip->client->dev,
"%s: Failed to read STATUS Reg\n", __func__);
goto out_unlock;
}
/* is data new & valid */
if (!(buf[0] & TSL2X7X_STA_ADC_VALID)) {
dev_err(&chip->client->dev,
"%s: data not valid yet\n", __func__);
ret = chip->als_cur_info.lux; /* return LAST VALUE */
goto out_unlock;
}
for (i = 0; i < 4; i++) {
ret = tsl2x7x_i2c_read(chip->client,
(TSL2X7X_CMD_REG | (TSL2X7X_ALS_CHAN0LO + i)),
&buf[i]);
if (ret < 0) {
dev_err(&chip->client->dev,
"%s: failed to read. err=%x\n", __func__, ret);
goto out_unlock;
}
}
/* clear any existing interrupt status */
ret = i2c_smbus_write_byte(chip->client,
(TSL2X7X_CMD_REG |
TSL2X7X_CMD_SPL_FN |
TSL2X7X_CMD_ALS_INT_CLR));
if (ret < 0) {
dev_err(&chip->client->dev,
"%s: i2c_write_command failed - err = %d\n",
__func__, ret);
goto out_unlock; /* have no data, so return failure */
}
/* extract ALS/lux data */
ch0 = le16_to_cpup((const __le16 *)&buf[0]);
ch1 = le16_to_cpup((const __le16 *)&buf[2]);
chip->als_cur_info.als_ch0 = ch0;
chip->als_cur_info.als_ch1 = ch1;
if ((ch0 >= chip->als_saturation) || (ch1 >= chip->als_saturation)) {
lux = TSL2X7X_LUX_CALC_OVER_FLOW;
goto return_max;
}
if (ch0 == 0) {
/* have no data, so return LAST VALUE */
ret = chip->als_cur_info.lux;
goto out_unlock;
}
/* calculate ratio */
ratio = (ch1 << 15) / ch0;
/* convert to unscaled lux using the pointer to the table */
p = (struct tsl2x7x_lux *) chip->tsl2x7x_device_lux;
while (p->ratio != 0 && p->ratio < ratio)
p++;
if (p->ratio == 0) {
lux = 0;
} else {
ch0lux = DIV_ROUND_UP((ch0 * p->ch0),
tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]);
ch1lux = DIV_ROUND_UP((ch1 * p->ch1),
tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]);
lux = ch0lux - ch1lux;
}
/* note: lux is 31 bit max at this point */
if (ch1lux > ch0lux) {
dev_dbg(&chip->client->dev, "ch1lux > ch0lux-return last value\n");
ret = chip->als_cur_info.lux;
goto out_unlock;
}
/* adjust for active time scale */
if (chip->als_time_scale == 0)
lux = 0;
else
lux = (lux + (chip->als_time_scale >> 1)) /
chip->als_time_scale;
/* adjust for active gain scale
* The tsl2x7x_device_lux tables have a factor of 256 built-in.
* User-specified gain provides a multiplier.
* Apply user-specified gain before shifting right to retain precision.
* Use 64 bits to avoid overflow on multiplication.
* Then go back to 32 bits before division to avoid using div_u64().
*/
lux64 = lux;
lux64 = lux64 * chip->tsl2x7x_settings.als_gain_trim;
lux64 >>= 8;
lux = lux64;
lux = (lux + 500) / 1000;
if (lux > TSL2X7X_LUX_CALC_OVER_FLOW) /* check for overflow */
lux = TSL2X7X_LUX_CALC_OVER_FLOW;
/* Update the structure with the latest lux. */
return_max:
chip->als_cur_info.lux = lux;
ret = lux;
out_unlock:
mutex_unlock(&chip->als_mutex);
return ret;
}
/**
* tsl2x7x_get_prox() - Reads proximity data registers and updates
* chip->prox_data.
*
* @indio_dev: pointer to IIO device
*/
static int tsl2x7x_get_prox(struct iio_dev *indio_dev)
{
int i;
int ret;
u8 status;
u8 chdata[2];
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
if (mutex_trylock(&chip->prox_mutex) == 0) {
dev_err(&chip->client->dev,
"%s: Can't get prox mutex\n", __func__);
return -EBUSY;
}
ret = tsl2x7x_i2c_read(chip->client,
(TSL2X7X_CMD_REG | TSL2X7X_STATUS), &status);
if (ret < 0) {
dev_err(&chip->client->dev,
"%s: i2c err=%d\n", __func__, ret);
goto prox_poll_err;
}
switch (chip->id) {
case tsl2571:
case tsl2671:
case tmd2671:
case tsl2771:
case tmd2771:
if (!(status & TSL2X7X_STA_ADC_VALID))
goto prox_poll_err;
break;
case tsl2572:
case tsl2672:
case tmd2672:
case tsl2772:
case tmd2772:
if (!(status & TSL2X7X_STA_PRX_VALID))
goto prox_poll_err;
break;
}
for (i = 0; i < 2; i++) {
ret = tsl2x7x_i2c_read(chip->client,
(TSL2X7X_CMD_REG |
(TSL2X7X_PRX_LO + i)), &chdata[i]);
if (ret < 0)
goto prox_poll_err;
}
chip->prox_data =
le16_to_cpup((const __le16 *)&chdata[0]);
prox_poll_err:
mutex_unlock(&chip->prox_mutex);
return chip->prox_data;
}
/**
* tsl2x7x_defaults() - Populates the device nominal operating parameters
* with those provided by a 'platform' data struct or
* with prefined defaults.
*
* @chip: pointer to device structure.
*/
static void tsl2x7x_defaults(struct tsl2X7X_chip *chip)
{
/* If Operational settings defined elsewhere.. */
if (chip->pdata && chip->pdata->platform_default_settings != 0)
memcpy(&(chip->tsl2x7x_settings),
chip->pdata->platform_default_settings,
sizeof(tsl2x7x_default_settings));
else
memcpy(&(chip->tsl2x7x_settings),
&tsl2x7x_default_settings,
sizeof(tsl2x7x_default_settings));
/* Load up the proper lux table. */
if (chip->pdata && chip->pdata->platform_lux_table[0].ratio != 0)
memcpy(chip->tsl2x7x_device_lux,
chip->pdata->platform_lux_table,
sizeof(chip->pdata->platform_lux_table));
else
memcpy(chip->tsl2x7x_device_lux,
(struct tsl2x7x_lux *)tsl2x7x_default_lux_table_group[chip->id],
MAX_DEFAULT_TABLE_BYTES);
}
/**
* tsl2x7x_als_calibrate() - Obtain single reading and calculate
* the als_gain_trim.
*
* @indio_dev: pointer to IIO device
*/
static int tsl2x7x_als_calibrate(struct iio_dev *indio_dev)
{
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
u8 reg_val;
int gain_trim_val;
int ret;
int lux_val;
ret = i2c_smbus_write_byte(chip->client,
(TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
if (ret < 0) {
dev_err(&chip->client->dev,
"%s: failed to write CNTRL register, ret=%d\n",
__func__, ret);
return ret;
}
reg_val = i2c_smbus_read_byte(chip->client);
if ((reg_val & (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON))
!= (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON)) {
dev_err(&chip->client->dev,
"%s: failed: ADC not enabled\n", __func__);
return -1;
}
ret = i2c_smbus_write_byte(chip->client,
(TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
if (ret < 0) {
dev_err(&chip->client->dev,
"%s: failed to write ctrl reg: ret=%d\n",
__func__, ret);
return ret;
}
reg_val = i2c_smbus_read_byte(chip->client);
if ((reg_val & TSL2X7X_STA_ADC_VALID) != TSL2X7X_STA_ADC_VALID) {
dev_err(&chip->client->dev,
"%s: failed: STATUS - ADC not valid.\n", __func__);
return -ENODATA;
}
lux_val = tsl2x7x_get_lux(indio_dev);
if (lux_val < 0) {
dev_err(&chip->client->dev,
"%s: failed to get lux\n", __func__);
return lux_val;
}
gain_trim_val = (((chip->tsl2x7x_settings.als_cal_target)
* chip->tsl2x7x_settings.als_gain_trim) / lux_val);
if ((gain_trim_val < 250) || (gain_trim_val > 4000))
return -ERANGE;
chip->tsl2x7x_settings.als_gain_trim = gain_trim_val;
dev_info(&chip->client->dev,
"%s als_calibrate completed\n", chip->client->name);
return (int) gain_trim_val;
}
static int tsl2x7x_chip_on(struct iio_dev *indio_dev)
{
int i;
int ret = 0;
u8 *dev_reg;
u8 utmp;
int als_count;
int als_time;
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
u8 reg_val = 0;
if (chip->pdata && chip->pdata->power_on)
chip->pdata->power_on(indio_dev);
/* Non calculated parameters */
chip->tsl2x7x_config[TSL2X7X_PRX_TIME] =
chip->tsl2x7x_settings.prx_time;
chip->tsl2x7x_config[TSL2X7X_WAIT_TIME] =
chip->tsl2x7x_settings.wait_time;
chip->tsl2x7x_config[TSL2X7X_PRX_CONFIG] =
chip->tsl2x7x_settings.prox_config;
chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHLO] =
(chip->tsl2x7x_settings.als_thresh_low) & 0xFF;
chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHHI] =
(chip->tsl2x7x_settings.als_thresh_low >> 8) & 0xFF;
chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHLO] =
(chip->tsl2x7x_settings.als_thresh_high) & 0xFF;
chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHHI] =
(chip->tsl2x7x_settings.als_thresh_high >> 8) & 0xFF;
chip->tsl2x7x_config[TSL2X7X_PERSISTENCE] =
chip->tsl2x7x_settings.persistence;
chip->tsl2x7x_config[TSL2X7X_PRX_COUNT] =
chip->tsl2x7x_settings.prox_pulse_count;
chip->tsl2x7x_config[TSL2X7X_PRX_MINTHRESHLO] =
chip->tsl2x7x_settings.prox_thres_low;
chip->tsl2x7x_config[TSL2X7X_PRX_MAXTHRESHLO] =
chip->tsl2x7x_settings.prox_thres_high;
/* and make sure we're not already on */
if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {
/* if forcing a register update - turn off, then on */
dev_info(&chip->client->dev, "device is already enabled\n");
return -EINVAL;
}
/* determine als integration register */
als_count = (chip->tsl2x7x_settings.als_time * 100 + 135) / 270;
if (als_count == 0)
als_count = 1; /* ensure at least one cycle */
/* convert back to time (encompasses overrides) */
als_time = (als_count * 27 + 5) / 10;
chip->tsl2x7x_config[TSL2X7X_ALS_TIME] = 256 - als_count;
/* Set the gain based on tsl2x7x_settings struct */
chip->tsl2x7x_config[TSL2X7X_GAIN] =
(chip->tsl2x7x_settings.als_gain |
(TSL2X7X_mA100 | TSL2X7X_DIODE1)
| ((chip->tsl2x7x_settings.prox_gain) << 2));
/* set chip struct re scaling and saturation */
chip->als_saturation = als_count * 922; /* 90% of full scale */
chip->als_time_scale = (als_time + 25) / 50;
/* TSL2X7X Specific power-on / adc enable sequence
* Power on the device 1st. */
utmp = TSL2X7X_CNTL_PWR_ON;
ret = i2c_smbus_write_byte_data(chip->client,
TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp);
if (ret < 0) {
dev_err(&chip->client->dev,
"%s: failed on CNTRL reg.\n", __func__);
return ret;
}
/* Use the following shadow copy for our delay before enabling ADC.
* Write all the registers. */
for (i = 0, dev_reg = chip->tsl2x7x_config;
i < TSL2X7X_MAX_CONFIG_REG; i++) {
ret = i2c_smbus_write_byte_data(chip->client,
TSL2X7X_CMD_REG + i, *dev_reg++);
if (ret < 0) {
dev_err(&chip->client->dev,
"%s: failed on write to reg %d.\n", __func__, i);
return ret;
}
}
mdelay(3); /* Power-on settling time */
/* NOW enable the ADC
* initialize the desired mode of operation */
utmp = TSL2X7X_CNTL_PWR_ON |
TSL2X7X_CNTL_ADC_ENBL |
TSL2X7X_CNTL_PROX_DET_ENBL;
ret = i2c_smbus_write_byte_data(chip->client,
TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp);
if (ret < 0) {
dev_err(&chip->client->dev,
"%s: failed on 2nd CTRL reg.\n", __func__);
return ret;
}
chip->tsl2x7x_chip_status = TSL2X7X_CHIP_WORKING;
if (chip->tsl2x7x_settings.interrupts_en != 0) {
dev_info(&chip->client->dev, "Setting Up Interrupt(s)\n");
reg_val = TSL2X7X_CNTL_PWR_ON | TSL2X7X_CNTL_ADC_ENBL;
if ((chip->tsl2x7x_settings.interrupts_en == 0x20) ||
(chip->tsl2x7x_settings.interrupts_en == 0x30))
reg_val |= TSL2X7X_CNTL_PROX_DET_ENBL;
reg_val |= chip->tsl2x7x_settings.interrupts_en;
ret = i2c_smbus_write_byte_data(chip->client,
(TSL2X7X_CMD_REG | TSL2X7X_CNTRL), reg_val);
if (ret < 0)
dev_err(&chip->client->dev,
"%s: failed in tsl2x7x_IOCTL_INT_SET.\n",
__func__);
/* Clear out any initial interrupts */
ret = i2c_smbus_write_byte(chip->client,
TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN |
TSL2X7X_CMD_PROXALS_INT_CLR);
if (ret < 0) {
dev_err(&chip->client->dev,
"%s: Failed to clear Int status\n",
__func__);
return ret;
}
}
return ret;
}
static int tsl2x7x_chip_off(struct iio_dev *indio_dev)
{
int ret;
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
/* turn device off */
chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED;
ret = i2c_smbus_write_byte_data(chip->client,
TSL2X7X_CMD_REG | TSL2X7X_CNTRL, 0x00);
if (chip->pdata && chip->pdata->power_off)
chip->pdata->power_off(chip->client);
return ret;
}
/**
* tsl2x7x_invoke_change
* @indio_dev: pointer to IIO device
*
* Obtain and lock both ALS and PROX resources,
* determine and save device state (On/Off),
* cycle device to implement updated parameter,
* put device back into proper state, and unlock
* resource.
*/
static
int tsl2x7x_invoke_change(struct iio_dev *indio_dev)
{
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
int device_status = chip->tsl2x7x_chip_status;
mutex_lock(&chip->als_mutex);
mutex_lock(&chip->prox_mutex);
if (device_status == TSL2X7X_CHIP_WORKING)
tsl2x7x_chip_off(indio_dev);
tsl2x7x_chip_on(indio_dev);
if (device_status != TSL2X7X_CHIP_WORKING)
tsl2x7x_chip_off(indio_dev);
mutex_unlock(&chip->prox_mutex);
mutex_unlock(&chip->als_mutex);
return 0;
}
static
void tsl2x7x_prox_calculate(int *data, int length,
struct tsl2x7x_prox_stat *statP)
{
int i;
int sample_sum;
int tmp;
if (length == 0)
length = 1;
sample_sum = 0;
statP->min = INT_MAX;
statP->max = INT_MIN;
for (i = 0; i < length; i++) {
sample_sum += data[i];
statP->min = min(statP->min, data[i]);
statP->max = max(statP->max, data[i]);
}
statP->mean = sample_sum / length;
sample_sum = 0;
for (i = 0; i < length; i++) {
tmp = data[i] - statP->mean;
sample_sum += tmp * tmp;
}
statP->stddev = int_sqrt((long)sample_sum)/length;
}
/**
* tsl2x7x_prox_cal() - Calculates std. and sets thresholds.
* @indio_dev: pointer to IIO device
*
* Calculates a standard deviation based on the samples,
* and sets the threshold accordingly.
*/
static void tsl2x7x_prox_cal(struct iio_dev *indio_dev)
{
int prox_history[MAX_SAMPLES_CAL + 1];
int i;
struct tsl2x7x_prox_stat prox_stat_data[2];
struct tsl2x7x_prox_stat *calP;
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
u8 tmp_irq_settings;
u8 current_state = chip->tsl2x7x_chip_status;
if (chip->tsl2x7x_settings.prox_max_samples_cal > MAX_SAMPLES_CAL) {
dev_err(&chip->client->dev,
"%s: max prox samples cal is too big: %d\n",
__func__, chip->tsl2x7x_settings.prox_max_samples_cal);
chip->tsl2x7x_settings.prox_max_samples_cal = MAX_SAMPLES_CAL;
}
/* have to stop to change settings */
tsl2x7x_chip_off(indio_dev);
/* Enable proximity detection save just in case prox not wanted yet*/
tmp_irq_settings = chip->tsl2x7x_settings.interrupts_en;
chip->tsl2x7x_settings.interrupts_en |= TSL2X7X_CNTL_PROX_INT_ENBL;
/*turn on device if not already on*/
tsl2x7x_chip_on(indio_dev);
/*gather the samples*/
for (i = 0; i < chip->tsl2x7x_settings.prox_max_samples_cal; i++) {
mdelay(15);
tsl2x7x_get_prox(indio_dev);
prox_history[i] = chip->prox_data;
dev_info(&chip->client->dev, "2 i=%d prox data= %d\n",
i, chip->prox_data);
}
tsl2x7x_chip_off(indio_dev);
calP = &prox_stat_data[PROX_STAT_CAL];
tsl2x7x_prox_calculate(prox_history,
chip->tsl2x7x_settings.prox_max_samples_cal, calP);
chip->tsl2x7x_settings.prox_thres_high = (calP->max << 1) - calP->mean;
dev_info(&chip->client->dev, " cal min=%d mean=%d max=%d\n",
calP->min, calP->mean, calP->max);
dev_info(&chip->client->dev,
"%s proximity threshold set to %d\n",
chip->client->name, chip->tsl2x7x_settings.prox_thres_high);
/* back to the way they were */
chip->tsl2x7x_settings.interrupts_en = tmp_irq_settings;
if (current_state == TSL2X7X_CHIP_WORKING)
tsl2x7x_chip_on(indio_dev);
}
static ssize_t tsl2x7x_power_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
return snprintf(buf, PAGE_SIZE, "%d\n", chip->tsl2x7x_chip_status);
}
static ssize_t tsl2x7x_power_state_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t len)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
bool value;
if (strtobool(buf, &value))
return -EINVAL;
if (value)
tsl2x7x_chip_on(indio_dev);
else
tsl2x7x_chip_off(indio_dev);
return len;
}
static ssize_t tsl2x7x_gain_available_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
switch (chip->id) {
case tsl2571:
case tsl2671:
case tmd2671:
case tsl2771:
case tmd2771:
return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 128");
break;
}
return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 120");
}
static ssize_t tsl2x7x_prox_gain_available_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%s\n", "1 2 4 8");
}
static ssize_t tsl2x7x_als_time_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
int y, z;
y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
z = y * TSL2X7X_MIN_ITIME;
y /= 1000;
z %= 1000;
return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
}
static ssize_t tsl2x7x_als_time_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t len)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
struct tsl2x7x_parse_result result;
result.integer = 0;
result.fract = 0;
tsl2x7x_parse_buffer(buf, &result);
result.fract /= 1000;
result.fract /= 3;
chip->tsl2x7x_settings.als_time =
(TSL2X7X_MAX_TIMER_CNT - (u8)result.fract);
dev_info(&chip->client->dev, "%s: als time = %d",
__func__, chip->tsl2x7x_settings.als_time);
tsl2x7x_invoke_change(indio_dev);
return IIO_VAL_INT_PLUS_MICRO;
}
static IIO_CONST_ATTR(in_illuminance0_integration_time_available,
".00272 - .696");
static ssize_t tsl2x7x_als_cal_target_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
return snprintf(buf, PAGE_SIZE, "%d\n",
chip->tsl2x7x_settings.als_cal_target);
}
static ssize_t tsl2x7x_als_cal_target_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t len)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
unsigned long value;
if (kstrtoul(buf, 0, &value))
return -EINVAL;
if (value)
chip->tsl2x7x_settings.als_cal_target = value;
tsl2x7x_invoke_change(indio_dev);
return len;
}
/* persistence settings */
static ssize_t tsl2x7x_als_persistence_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
int y, z, filter_delay;
/* Determine integration time */
y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
z = y * TSL2X7X_MIN_ITIME;
filter_delay = z * (chip->tsl2x7x_settings.persistence & 0x0F);
y = (filter_delay / 1000);
z = (filter_delay % 1000);
return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
}
static ssize_t tsl2x7x_als_persistence_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t len)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
struct tsl2x7x_parse_result result;
int y, z, filter_delay;
result.integer = 0;
result.fract = 0;
tsl2x7x_parse_buffer(buf, &result);
result.fract /= 1000;
y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
z = y * TSL2X7X_MIN_ITIME;
filter_delay =
DIV_ROUND_UP(((result.integer * 1000) + result.fract), z);
chip->tsl2x7x_settings.persistence &= 0xF0;
chip->tsl2x7x_settings.persistence |= (filter_delay & 0x0F);
dev_info(&chip->client->dev, "%s: als persistence = %d",
__func__, filter_delay);
tsl2x7x_invoke_change(indio_dev);
return IIO_VAL_INT_PLUS_MICRO;
}
static ssize_t tsl2x7x_prox_persistence_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
int y, z, filter_delay;
/* Determine integration time */
y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1;
z = y * TSL2X7X_MIN_ITIME;
filter_delay = z * ((chip->tsl2x7x_settings.persistence & 0xF0) >> 4);
y = (filter_delay / 1000);
z = (filter_delay % 1000);
return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
}
static ssize_t tsl2x7x_prox_persistence_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t len)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
struct tsl2x7x_parse_result result;
int y, z, filter_delay;
result.integer = 0;
result.fract = 0;
tsl2x7x_parse_buffer(buf, &result);
result.fract /= 1000;
y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1;
z = y * TSL2X7X_MIN_ITIME;
filter_delay =
DIV_ROUND_UP(((result.integer * 1000) + result.fract), z);
chip->tsl2x7x_settings.persistence &= 0x0F;
chip->tsl2x7x_settings.persistence |= ((filter_delay << 4) & 0xF0);
dev_info(&chip->client->dev, "%s: prox persistence = %d",
__func__, filter_delay);
tsl2x7x_invoke_change(indio_dev);
return IIO_VAL_INT_PLUS_MICRO;
}
static ssize_t tsl2x7x_do_calibrate(struct device *dev,
struct device_attribute *attr, const char *buf, size_t len)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
bool value;
if (strtobool(buf, &value))
return -EINVAL;
if (value)
tsl2x7x_als_calibrate(indio_dev);
tsl2x7x_invoke_change(indio_dev);
return len;
}
static ssize_t tsl2x7x_luxtable_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
int i = 0;
int offset = 0;
while (i < (TSL2X7X_MAX_LUX_TABLE_SIZE * 3)) {
offset += snprintf(buf + offset, PAGE_SIZE, "%d,%d,%d,",
chip->tsl2x7x_device_lux[i].ratio,
chip->tsl2x7x_device_lux[i].ch0,
chip->tsl2x7x_device_lux[i].ch1);
if (chip->tsl2x7x_device_lux[i].ratio == 0) {
/* We just printed the first "0" entry.
* Now get rid of the extra "," and break. */
offset--;
break;
}
i++;
}
offset += snprintf(buf + offset, PAGE_SIZE, "\n");
return offset;
}
static ssize_t tsl2x7x_luxtable_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t len)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
int value[ARRAY_SIZE(chip->tsl2x7x_device_lux)*3 + 1];
int n;
get_options(buf, ARRAY_SIZE(value), value);
/* We now have an array of ints starting at value[1], and
* enumerated by value[0].
* We expect each group of three ints is one table entry,
* and the last table entry is all 0.
*/
n = value[0];
if ((n % 3) || n < 6 ||
n > ((ARRAY_SIZE(chip->tsl2x7x_device_lux) - 1) * 3)) {
dev_info(dev, "LUX TABLE INPUT ERROR 1 Value[0]=%d\n", n);
return -EINVAL;
}
if ((value[(n - 2)] | value[(n - 1)] | value[n]) != 0) {
dev_info(dev, "LUX TABLE INPUT ERROR 2 Value[0]=%d\n", n);
return -EINVAL;
}
if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING)
tsl2x7x_chip_off(indio_dev);
/* Zero out the table */
memset(chip->tsl2x7x_device_lux, 0, sizeof(chip->tsl2x7x_device_lux));
memcpy(chip->tsl2x7x_device_lux, &value[1], (value[0] * 4));
tsl2x7x_invoke_change(indio_dev);
return len;
}
static ssize_t tsl2x7x_do_prox_calibrate(struct device *dev,
struct device_attribute *attr, const char *buf, size_t len)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
bool value;
if (strtobool(buf, &value))
return -EINVAL;
if (value)
tsl2x7x_prox_cal(indio_dev);
tsl2x7x_invoke_change(indio_dev);
return len;
}
static int tsl2x7x_read_interrupt_config(struct iio_dev *indio_dev,
u64 event_code)
{
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
int ret;
if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY)
ret = !!(chip->tsl2x7x_settings.interrupts_en & 0x10);
else
ret = !!(chip->tsl2x7x_settings.interrupts_en & 0x20);
return ret;
}
static int tsl2x7x_write_interrupt_config(struct iio_dev *indio_dev,
u64 event_code,
int val)
{
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY) {
if (val)
chip->tsl2x7x_settings.interrupts_en |= 0x10;
else
chip->tsl2x7x_settings.interrupts_en &= 0x20;
} else {
if (val)
chip->tsl2x7x_settings.interrupts_en |= 0x20;
else
chip->tsl2x7x_settings.interrupts_en &= 0x10;
}
tsl2x7x_invoke_change(indio_dev);
return 0;
}
static int tsl2x7x_write_thresh(struct iio_dev *indio_dev,
u64 event_code,
int val)
{
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY) {
switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
case IIO_EV_DIR_RISING:
chip->tsl2x7x_settings.als_thresh_high = val;
break;
case IIO_EV_DIR_FALLING:
chip->tsl2x7x_settings.als_thresh_low = val;
break;
default:
return -EINVAL;
}
} else {
switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
case IIO_EV_DIR_RISING:
chip->tsl2x7x_settings.prox_thres_high = val;
break;
case IIO_EV_DIR_FALLING:
chip->tsl2x7x_settings.prox_thres_low = val;
break;
default:
return -EINVAL;
}
}
tsl2x7x_invoke_change(indio_dev);
return 0;
}
static int tsl2x7x_read_thresh(struct iio_dev *indio_dev,
u64 event_code,
int *val)
{
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY) {
switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
case IIO_EV_DIR_RISING:
*val = chip->tsl2x7x_settings.als_thresh_high;
break;
case IIO_EV_DIR_FALLING:
*val = chip->tsl2x7x_settings.als_thresh_low;
break;
default:
return -EINVAL;
}
} else {
switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
case IIO_EV_DIR_RISING:
*val = chip->tsl2x7x_settings.prox_thres_high;
break;
case IIO_EV_DIR_FALLING:
*val = chip->tsl2x7x_settings.prox_thres_low;
break;
default:
return -EINVAL;
}
}
return 0;
}
static int tsl2x7x_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int *val,
int *val2,
long mask)
{
int ret = -EINVAL;
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
switch (mask) {
case IIO_CHAN_INFO_PROCESSED:
switch (chan->type) {
case IIO_LIGHT:
tsl2x7x_get_lux(indio_dev);
*val = chip->als_cur_info.lux;
ret = IIO_VAL_INT;
break;
default:
return -EINVAL;
break;
}
break;
case IIO_CHAN_INFO_RAW:
switch (chan->type) {
case IIO_INTENSITY:
tsl2x7x_get_lux(indio_dev);
if (chan->channel == 0)
*val = chip->als_cur_info.als_ch0;
else
*val = chip->als_cur_info.als_ch1;
ret = IIO_VAL_INT;
break;
case IIO_PROXIMITY:
tsl2x7x_get_prox(indio_dev);
*val = chip->prox_data;
ret = IIO_VAL_INT;
break;
default:
return -EINVAL;
break;
}
break;
case IIO_CHAN_INFO_CALIBSCALE:
if (chan->type == IIO_LIGHT)
*val =
tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain];
else
*val =
tsl2X7X_prx_gainadj[chip->tsl2x7x_settings.prox_gain];
ret = IIO_VAL_INT;
break;
case IIO_CHAN_INFO_CALIBBIAS:
*val = chip->tsl2x7x_settings.als_gain_trim;
ret = IIO_VAL_INT;
break;
default:
ret = -EINVAL;
}
return ret;
}
static int tsl2x7x_write_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int val,
int val2,
long mask)
{
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
switch (mask) {
case IIO_CHAN_INFO_CALIBSCALE:
if (chan->type == IIO_INTENSITY) {
switch (val) {
case 1:
chip->tsl2x7x_settings.als_gain = 0;
break;
case 8:
chip->tsl2x7x_settings.als_gain = 1;
break;
case 16:
chip->tsl2x7x_settings.als_gain = 2;
break;
case 120:
switch (chip->id) {
case tsl2572:
case tsl2672:
case tmd2672:
case tsl2772:
case tmd2772:
return -EINVAL;
break;
}
chip->tsl2x7x_settings.als_gain = 3;
break;
case 128:
switch (chip->id) {
case tsl2571:
case tsl2671:
case tmd2671:
case tsl2771:
case tmd2771:
return -EINVAL;
break;
}
chip->tsl2x7x_settings.als_gain = 3;
break;
default:
return -EINVAL;
}
} else {
switch (val) {
case 1:
chip->tsl2x7x_settings.prox_gain = 0;
break;
case 2:
chip->tsl2x7x_settings.prox_gain = 1;
break;
case 4:
chip->tsl2x7x_settings.prox_gain = 2;
break;
case 8:
chip->tsl2x7x_settings.prox_gain = 3;
break;
default:
return -EINVAL;
}
}
break;
case IIO_CHAN_INFO_CALIBBIAS:
chip->tsl2x7x_settings.als_gain_trim = val;
break;
default:
return -EINVAL;
}
tsl2x7x_invoke_change(indio_dev);
return 0;
}
static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR,
tsl2x7x_power_state_show, tsl2x7x_power_state_store);
static DEVICE_ATTR(in_proximity0_calibscale_available, S_IRUGO,
tsl2x7x_prox_gain_available_show, NULL);
static DEVICE_ATTR(in_illuminance0_calibscale_available, S_IRUGO,
tsl2x7x_gain_available_show, NULL);
static DEVICE_ATTR(in_illuminance0_integration_time, S_IRUGO | S_IWUSR,
tsl2x7x_als_time_show, tsl2x7x_als_time_store);
static DEVICE_ATTR(in_illuminance0_target_input, S_IRUGO | S_IWUSR,
tsl2x7x_als_cal_target_show, tsl2x7x_als_cal_target_store);
static DEVICE_ATTR(in_illuminance0_calibrate, S_IWUSR, NULL,
tsl2x7x_do_calibrate);
static DEVICE_ATTR(in_proximity0_calibrate, S_IWUSR, NULL,
tsl2x7x_do_prox_calibrate);
static DEVICE_ATTR(in_illuminance0_lux_table, S_IRUGO | S_IWUSR,
tsl2x7x_luxtable_show, tsl2x7x_luxtable_store);
static DEVICE_ATTR(in_intensity0_thresh_period, S_IRUGO | S_IWUSR,
tsl2x7x_als_persistence_show, tsl2x7x_als_persistence_store);
static DEVICE_ATTR(in_proximity0_thresh_period, S_IRUGO | S_IWUSR,
tsl2x7x_prox_persistence_show, tsl2x7x_prox_persistence_store);
/* Use the default register values to identify the Taos device */
static int tsl2x7x_device_id(unsigned char *id, int target)
{
switch (target) {
case tsl2571:
case tsl2671:
case tsl2771:
return ((*id & 0xf0) == TRITON_ID);
break;
case tmd2671:
case tmd2771:
return ((*id & 0xf0) == HALIBUT_ID);
break;
case tsl2572:
case tsl2672:
case tmd2672:
case tsl2772:
case tmd2772:
return ((*id & 0xf0) == SWORDFISH_ID);
break;
}
return -EINVAL;
}
static irqreturn_t tsl2x7x_event_handler(int irq, void *private)
{
struct iio_dev *indio_dev = private;
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
s64 timestamp = iio_get_time_ns();
int ret;
u8 value;
value = i2c_smbus_read_byte_data(chip->client,
TSL2X7X_CMD_REG | TSL2X7X_STATUS);
/* What type of interrupt do we need to process */
if (value & TSL2X7X_STA_PRX_INTR) {
tsl2x7x_get_prox(indio_dev); /* freshen data for ABI */
iio_push_event(indio_dev,
IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY,
0,
IIO_EV_TYPE_THRESH,
IIO_EV_DIR_EITHER),
timestamp);
}
if (value & TSL2X7X_STA_ALS_INTR) {
tsl2x7x_get_lux(indio_dev); /* freshen data for ABI */
iio_push_event(indio_dev,
IIO_UNMOD_EVENT_CODE(IIO_LIGHT,
0,
IIO_EV_TYPE_THRESH,
IIO_EV_DIR_EITHER),
timestamp);
}
/* Clear interrupt now that we have handled it. */
ret = i2c_smbus_write_byte(chip->client,
TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN |
TSL2X7X_CMD_PROXALS_INT_CLR);
if (ret < 0)
dev_err(&chip->client->dev,
"%s: Failed to clear irq from event handler. err = %d\n",
__func__, ret);
return IRQ_HANDLED;
}
static struct attribute *tsl2x7x_ALS_device_attrs[] = {
&dev_attr_power_state.attr,
&dev_attr_in_illuminance0_calibscale_available.attr,
&dev_attr_in_illuminance0_integration_time.attr,
&iio_const_attr_in_illuminance0_integration_time_available\
.dev_attr.attr,
&dev_attr_in_illuminance0_target_input.attr,
&dev_attr_in_illuminance0_calibrate.attr,
&dev_attr_in_illuminance0_lux_table.attr,
NULL
};
static struct attribute *tsl2x7x_PRX_device_attrs[] = {
&dev_attr_power_state.attr,
&dev_attr_in_proximity0_calibrate.attr,
NULL
};
static struct attribute *tsl2x7x_ALSPRX_device_attrs[] = {
&dev_attr_power_state.attr,
&dev_attr_in_illuminance0_calibscale_available.attr,
&dev_attr_in_illuminance0_integration_time.attr,
&iio_const_attr_in_illuminance0_integration_time_available\
.dev_attr.attr,
&dev_attr_in_illuminance0_target_input.attr,
&dev_attr_in_illuminance0_calibrate.attr,
&dev_attr_in_illuminance0_lux_table.attr,
&dev_attr_in_proximity0_calibrate.attr,
NULL
};
static struct attribute *tsl2x7x_PRX2_device_attrs[] = {
&dev_attr_power_state.attr,
&dev_attr_in_proximity0_calibrate.attr,
&dev_attr_in_proximity0_calibscale_available.attr,
NULL
};
static struct attribute *tsl2x7x_ALSPRX2_device_attrs[] = {
&dev_attr_power_state.attr,
&dev_attr_in_illuminance0_calibscale_available.attr,
&dev_attr_in_illuminance0_integration_time.attr,
&iio_const_attr_in_illuminance0_integration_time_available\
.dev_attr.attr,
&dev_attr_in_illuminance0_target_input.attr,
&dev_attr_in_illuminance0_calibrate.attr,
&dev_attr_in_illuminance0_lux_table.attr,
&dev_attr_in_proximity0_calibrate.attr,
&dev_attr_in_proximity0_calibscale_available.attr,
NULL
};
static struct attribute *tsl2X7X_ALS_event_attrs[] = {
&dev_attr_in_intensity0_thresh_period.attr,
NULL,
};
static struct attribute *tsl2X7X_PRX_event_attrs[] = {
&dev_attr_in_proximity0_thresh_period.attr,
NULL,
};
static struct attribute *tsl2X7X_ALSPRX_event_attrs[] = {
&dev_attr_in_intensity0_thresh_period.attr,
&dev_attr_in_proximity0_thresh_period.attr,
NULL,
};
static const struct attribute_group tsl2X7X_device_attr_group_tbl[] = {
[ALS] = {
.attrs = tsl2x7x_ALS_device_attrs,
},
[PRX] = {
.attrs = tsl2x7x_PRX_device_attrs,
},
[ALSPRX] = {
.attrs = tsl2x7x_ALSPRX_device_attrs,
},
[PRX2] = {
.attrs = tsl2x7x_PRX2_device_attrs,
},
[ALSPRX2] = {
.attrs = tsl2x7x_ALSPRX2_device_attrs,
},
};
static struct attribute_group tsl2X7X_event_attr_group_tbl[] = {
[ALS] = {
.attrs = tsl2X7X_ALS_event_attrs,
.name = "events",
},
[PRX] = {
.attrs = tsl2X7X_PRX_event_attrs,
.name = "events",
},
[ALSPRX] = {
.attrs = tsl2X7X_ALSPRX_event_attrs,
.name = "events",
},
};
static const struct iio_info tsl2X7X_device_info[] = {
[ALS] = {
.attrs = &tsl2X7X_device_attr_group_tbl[ALS],
.event_attrs = &tsl2X7X_event_attr_group_tbl[ALS],
.driver_module = THIS_MODULE,
.read_raw = &tsl2x7x_read_raw,
.write_raw = &tsl2x7x_write_raw,
.read_event_value = &tsl2x7x_read_thresh,
.write_event_value = &tsl2x7x_write_thresh,
.read_event_config = &tsl2x7x_read_interrupt_config,
.write_event_config = &tsl2x7x_write_interrupt_config,
},
[PRX] = {
.attrs = &tsl2X7X_device_attr_group_tbl[PRX],
.event_attrs = &tsl2X7X_event_attr_group_tbl[PRX],
.driver_module = THIS_MODULE,
.read_raw = &tsl2x7x_read_raw,
.write_raw = &tsl2x7x_write_raw,
.read_event_value = &tsl2x7x_read_thresh,
.write_event_value = &tsl2x7x_write_thresh,
.read_event_config = &tsl2x7x_read_interrupt_config,
.write_event_config = &tsl2x7x_write_interrupt_config,
},
[ALSPRX] = {
.attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX],
.event_attrs = &tsl2X7X_event_attr_group_tbl[ALSPRX],
.driver_module = THIS_MODULE,
.read_raw = &tsl2x7x_read_raw,
.write_raw = &tsl2x7x_write_raw,
.read_event_value = &tsl2x7x_read_thresh,
.write_event_value = &tsl2x7x_write_thresh,
.read_event_config = &tsl2x7x_read_interrupt_config,
.write_event_config = &tsl2x7x_write_interrupt_config,
},
[PRX2] = {
.attrs = &tsl2X7X_device_attr_group_tbl[PRX2],
.event_attrs = &tsl2X7X_event_attr_group_tbl[PRX],
.driver_module = THIS_MODULE,
.read_raw = &tsl2x7x_read_raw,
.write_raw = &tsl2x7x_write_raw,
.read_event_value = &tsl2x7x_read_thresh,
.write_event_value = &tsl2x7x_write_thresh,
.read_event_config = &tsl2x7x_read_interrupt_config,
.write_event_config = &tsl2x7x_write_interrupt_config,
},
[ALSPRX2] = {
.attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX2],
.event_attrs = &tsl2X7X_event_attr_group_tbl[ALSPRX],
.driver_module = THIS_MODULE,
.read_raw = &tsl2x7x_read_raw,
.write_raw = &tsl2x7x_write_raw,
.read_event_value = &tsl2x7x_read_thresh,
.write_event_value = &tsl2x7x_write_thresh,
.read_event_config = &tsl2x7x_read_interrupt_config,
.write_event_config = &tsl2x7x_write_interrupt_config,
},
};
static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
[ALS] = {
.channel = {
{
.type = IIO_LIGHT,
.indexed = 1,
.channel = 0,
.info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT,
}, {
.type = IIO_INTENSITY,
.indexed = 1,
.channel = 0,
.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
.event_mask = TSL2X7X_EVENT_MASK
}, {
.type = IIO_INTENSITY,
.indexed = 1,
.channel = 1,
},
},
.chan_table_elements = 3,
.info = &tsl2X7X_device_info[ALS],
},
[PRX] = {
.channel = {
{
.type = IIO_PROXIMITY,
.indexed = 1,
.channel = 0,
.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
.event_mask = TSL2X7X_EVENT_MASK
},
},
.chan_table_elements = 1,
.info = &tsl2X7X_device_info[PRX],
},
[ALSPRX] = {
.channel = {
{
.type = IIO_LIGHT,
.indexed = 1,
.channel = 0,
.info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT
}, {
.type = IIO_INTENSITY,
.indexed = 1,
.channel = 0,
.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
.event_mask = TSL2X7X_EVENT_MASK
}, {
.type = IIO_INTENSITY,
.indexed = 1,
.channel = 1,
.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
}, {
.type = IIO_PROXIMITY,
.indexed = 1,
.channel = 0,
.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
.event_mask = TSL2X7X_EVENT_MASK
},
},
.chan_table_elements = 4,
.info = &tsl2X7X_device_info[ALSPRX],
},
[PRX2] = {
.channel = {
{
.type = IIO_PROXIMITY,
.indexed = 1,
.channel = 0,
.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
.event_mask = TSL2X7X_EVENT_MASK
},
},
.chan_table_elements = 1,
.info = &tsl2X7X_device_info[PRX2],
},
[ALSPRX2] = {
.channel = {
{
.type = IIO_LIGHT,
.indexed = 1,
.channel = 0,
.info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT,
}, {
.type = IIO_INTENSITY,
.indexed = 1,
.channel = 0,
.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
.event_mask = TSL2X7X_EVENT_MASK
}, {
.type = IIO_INTENSITY,
.indexed = 1,
.channel = 1,
.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
}, {
.type = IIO_PROXIMITY,
.indexed = 1,
.channel = 0,
.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
.event_mask = TSL2X7X_EVENT_MASK
},
},
.chan_table_elements = 4,
.info = &tsl2X7X_device_info[ALSPRX2],
},
};
static int tsl2x7x_probe(struct i2c_client *clientp,
const struct i2c_device_id *id)
{
int ret;
unsigned char device_id;
struct iio_dev *indio_dev;
struct tsl2X7X_chip *chip;
indio_dev = iio_device_alloc(sizeof(*chip));
if (!indio_dev)
return -ENOMEM;
chip = iio_priv(indio_dev);
chip->client = clientp;
i2c_set_clientdata(clientp, indio_dev);
ret = tsl2x7x_i2c_read(chip->client,
TSL2X7X_CHIPID, &device_id);
if (ret < 0)
goto fail1;
if ((!tsl2x7x_device_id(&device_id, id->driver_data)) ||
(tsl2x7x_device_id(&device_id, id->driver_data) == -EINVAL)) {
dev_info(&chip->client->dev,
"%s: i2c device found does not match expected id\n",
__func__);
goto fail1;
}
ret = i2c_smbus_write_byte(clientp, (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
if (ret < 0) {
dev_err(&clientp->dev, "%s: write to cmd reg failed. err = %d\n",
__func__, ret);
goto fail1;
}
/* ALS and PROX functions can be invoked via user space poll
* or H/W interrupt. If busy return last sample. */
mutex_init(&chip->als_mutex);
mutex_init(&chip->prox_mutex);
chip->tsl2x7x_chip_status = TSL2X7X_CHIP_UNKNOWN;
chip->pdata = clientp->dev.platform_data;
chip->id = id->driver_data;
chip->chip_info =
&tsl2x7x_chip_info_tbl[device_channel_config[id->driver_data]];
indio_dev->info = chip->chip_info->info;
indio_dev->dev.parent = &clientp->dev;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->name = chip->client->name;
indio_dev->channels = chip->chip_info->channel;
indio_dev->num_channels = chip->chip_info->chan_table_elements;
if (clientp->irq) {
ret = request_threaded_irq(clientp->irq,
NULL,
&tsl2x7x_event_handler,
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
"TSL2X7X_event",
indio_dev);
if (ret) {
dev_err(&clientp->dev,
"%s: irq request failed", __func__);
goto fail2;
}
}
/* Load up the defaults */
tsl2x7x_defaults(chip);
/* Make sure the chip is on */
tsl2x7x_chip_on(indio_dev);
ret = iio_device_register(indio_dev);
if (ret) {
dev_err(&clientp->dev,
"%s: iio registration failed\n", __func__);
goto fail1;
}
dev_info(&clientp->dev, "%s Light sensor found.\n", id->name);
return 0;
fail1:
if (clientp->irq)
free_irq(clientp->irq, indio_dev);
fail2:
iio_device_free(indio_dev);
return ret;
}
static int tsl2x7x_suspend(struct device *dev)
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
int ret = 0;
if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {
ret = tsl2x7x_chip_off(indio_dev);
chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED;
}
if (chip->pdata && chip->pdata->platform_power) {
pm_message_t pmm = {PM_EVENT_SUSPEND};
chip->pdata->platform_power(dev, pmm);
}
return ret;
}
static int tsl2x7x_resume(struct device *dev)
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
int ret = 0;
if (chip->pdata && chip->pdata->platform_power) {
pm_message_t pmm = {PM_EVENT_RESUME};
chip->pdata->platform_power(dev, pmm);
}
if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_SUSPENDED)
ret = tsl2x7x_chip_on(indio_dev);
return ret;
}
static int tsl2x7x_remove(struct i2c_client *client)
{
struct iio_dev *indio_dev = i2c_get_clientdata(client);
tsl2x7x_chip_off(indio_dev);
iio_device_unregister(indio_dev);
if (client->irq)
free_irq(client->irq, indio_dev);
iio_device_free(indio_dev);
return 0;
}
static struct i2c_device_id tsl2x7x_idtable[] = {
{ "tsl2571", tsl2571 },
{ "tsl2671", tsl2671 },
{ "tmd2671", tmd2671 },
{ "tsl2771", tsl2771 },
{ "tmd2771", tmd2771 },
{ "tsl2572", tsl2572 },
{ "tsl2672", tsl2672 },
{ "tmd2672", tmd2672 },
{ "tsl2772", tsl2772 },
{ "tmd2772", tmd2772 },
{}
};
MODULE_DEVICE_TABLE(i2c, tsl2x7x_idtable);
static const struct dev_pm_ops tsl2x7x_pm_ops = {
.suspend = tsl2x7x_suspend,
.resume = tsl2x7x_resume,
};
/* Driver definition */
static struct i2c_driver tsl2x7x_driver = {
.driver = {
.name = "tsl2x7x",
.pm = &tsl2x7x_pm_ops,
},
.id_table = tsl2x7x_idtable,
.probe = tsl2x7x_probe,
.remove = tsl2x7x_remove,
};
module_i2c_driver(tsl2x7x_driver);
MODULE_AUTHOR("J. August Brenner<jbrenner@taosinc.com>");
MODULE_DESCRIPTION("TAOS tsl2x7x ambient and proximity light sensor driver");
MODULE_LICENSE("GPL");
|