aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/hwmon/w83781d.c
blob: fc12bd412e3a4917b5645339d3dd388af8f0d3a3 (plain)
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
/*
    w83781d.c - Part of lm_sensors, Linux kernel modules for hardware
                monitoring
    Copyright (c) 1998 - 2001  Frodo Looijaard <frodol@dds.nl>,
                               Philip Edelbrock <phil@netroedge.com>,
                               and Mark Studebaker <mdsxyz123@yahoo.com>
    Copyright (c) 2007 - 2008  Jean Delvare <khali@linux-fr.org>

    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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

/*
    Supports following chips:

    Chip	#vin	#fanin	#pwm	#temp	wchipid	vendid	i2c	ISA
    as99127f	7	3	0	3	0x31	0x12c3	yes	no
    as99127f rev.2 (type_name = as99127f)	0x31	0x5ca3	yes	no
    w83781d	7	3	0	3	0x10-1	0x5ca3	yes	yes
    w83782d	9	3	2-4	3	0x30	0x5ca3	yes	yes
    w83783s	5-6	3	2	1-2	0x40	0x5ca3	yes	no

*/

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-vid.h>
#include <linux/hwmon-sysfs.h>
#include <linux/sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>

#ifdef CONFIG_ISA
#include <linux/platform_device.h>
#include <linux/ioport.h>
#include <asm/io.h>
#endif

#include "lm75.h"

/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
						0x2e, 0x2f, I2C_CLIENT_END };
/* Insmod parameters */
I2C_CLIENT_INSMOD_4(w83781d, w83782d, w83783s, as99127f);
I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: "
		    "{bus, clientaddr, subclientaddr1, subclientaddr2}");

static int reset;
module_param(reset, bool, 0);
MODULE_PARM_DESC(reset, "Set to one to reset chip on load");

static int init = 1;
module_param(init, bool, 0);
MODULE_PARM_DESC(init, "Set to zero to bypass chip initialization");

/* Constants specified below */

/* Length of ISA address segment */
#define W83781D_EXTENT			8

/* Where are the ISA address/data registers relative to the base address */
#define W83781D_ADDR_REG_OFFSET		5
#define W83781D_DATA_REG_OFFSET		6

/* The device registers */
/* in nr from 0 to 8 */
#define W83781D_REG_IN_MAX(nr)		((nr < 7) ? (0x2b + (nr) * 2) : \
						    (0x554 + (((nr) - 7) * 2)))
#define W83781D_REG_IN_MIN(nr)		((nr < 7) ? (0x2c + (nr) * 2) : \
						    (0x555 + (((nr) - 7) * 2)))
#define W83781D_REG_IN(nr)		((nr < 7) ? (0x20 + (nr)) : \
						    (0x550 + (nr) - 7))

/* fan nr from 0 to 2 */
#define W83781D_REG_FAN_MIN(nr)		(0x3b + (nr))
#define W83781D_REG_FAN(nr)		(0x28 + (nr))

#define W83781D_REG_BANK		0x4E
#define W83781D_REG_TEMP2_CONFIG	0x152
#define W83781D_REG_TEMP3_CONFIG	0x252
/* temp nr from 1 to 3 */
#define W83781D_REG_TEMP(nr)		((nr == 3) ? (0x0250) : \
					((nr == 2) ? (0x0150) : \
						     (0x27)))
#define W83781D_REG_TEMP_HYST(nr)	((nr == 3) ? (0x253) : \
					((nr == 2) ? (0x153) : \
						     (0x3A)))
#define W83781D_REG_TEMP_OVER(nr)	((nr == 3) ? (0x255) : \
					((nr == 2) ? (0x155) : \
						     (0x39)))

#define W83781D_REG_CONFIG		0x40

/* Interrupt status (W83781D, AS99127F) */
#define W83781D_REG_ALARM1		0x41
#define W83781D_REG_ALARM2		0x42

/* Real-time status (W83782D, W83783S) */
#define W83782D_REG_ALARM1		0x459
#define W83782D_REG_ALARM2		0x45A
#define W83782D_REG_ALARM3		0x45B

#define W83781D_REG_BEEP_CONFIG		0x4D
#define W83781D_REG_BEEP_INTS1		0x56
#define W83781D_REG_BEEP_INTS2		0x57
#define W83781D_REG_BEEP_INTS3		0x453	/* not on W83781D */

#define W83781D_REG_VID_FANDIV		0x47

#define W83781D_REG_CHIPID		0x49
#define W83781D_REG_WCHIPID		0x58
#define W83781D_REG_CHIPMAN		0x4F
#define W83781D_REG_PIN			0x4B

/* 782D/783S only */
#define W83781D_REG_VBAT		0x5D

/* PWM 782D (1-4) and 783S (1-2) only */
static const u8 W83781D_REG_PWM[] = { 0x5B, 0x5A, 0x5E, 0x5F };
#define W83781D_REG_PWMCLK12		0x5C
#define W83781D_REG_PWMCLK34		0x45C

#define W83781D_REG_I2C_ADDR		0x48
#define W83781D_REG_I2C_SUBADDR		0x4A

/* The following are undocumented in the data sheets however we
   received the information in an email from Winbond tech support */
/* Sensor selection - not on 781d */
#define W83781D_REG_SCFG1		0x5D
static const u8 BIT_SCFG1[] = { 0x02, 0x04, 0x08 };

#define W83781D_REG_SCFG2		0x59
static const u8 BIT_SCFG2[] = { 0x10, 0x20, 0x40 };

#define W83781D_DEFAULT_BETA		3435

/* Conversions */
#define IN_TO_REG(val)			SENSORS_LIMIT(((val) + 8) / 16, 0, 255)
#define IN_FROM_REG(val)		((val) * 16)

static inline u8
FAN_TO_REG(long rpm, int div)
{
	if (rpm == 0)
		return 255;
	rpm = SENSORS_LIMIT(rpm, 1, 1000000);
	return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
}

static inline long
FAN_FROM_REG(u8 val, int div)
{
	if (val == 0)
		return -1;
	if (val == 255)
		return 0;
	return 1350000 / (val * div);
}

#define TEMP_TO_REG(val)		SENSORS_LIMIT((val) / 1000, -127, 128)
#define TEMP_FROM_REG(val)		((val) * 1000)

#define BEEP_MASK_FROM_REG(val,type)	((type) == as99127f ? \
					 (~(val)) & 0x7fff : (val) & 0xff7fff)
#define BEEP_MASK_TO_REG(val,type)	((type) == as99127f ? \
					 (~(val)) & 0x7fff : (val) & 0xff7fff)

#define DIV_FROM_REG(val)		(1 << (val))

static inline u8
DIV_TO_REG(long val, enum chips type)
{
	int i;
	val = SENSORS_LIMIT(val, 1,
			    ((type == w83781d
			      || type == as99127f) ? 8 : 128)) >> 1;
	for (i = 0; i < 7; i++) {
		if (val == 0)
			break;
		val >>= 1;
	}
	return i;
}

struct w83781d_data {
	struct i2c_client *client;
	struct device *hwmon_dev;
	struct mutex lock;
	enum chips type;

	/* For ISA device only */
	const char *name;
	int isa_addr;

	struct mutex update_lock;
	char valid;		/* !=0 if following fields are valid */
	unsigned long last_updated;	/* In jiffies */

	struct i2c_client *lm75[2];	/* for secondary I2C addresses */
	/* array of 2 pointers to subclients */

	u8 in[9];		/* Register value - 8 & 9 for 782D only */
	u8 in_max[9];		/* Register value - 8 & 9 for 782D only */
	u8 in_min[9];		/* Register value - 8 & 9 for 782D only */
	u8 fan[3];		/* Register value */
	u8 fan_min[3];		/* Register value */
	s8 temp;		/* Register value */
	s8 temp_max;		/* Register value */
	s8 temp_max_hyst;	/* Register value */
	u16 temp_add[2];	/* Register value */
	u16 temp_max_add[2];	/* Register value */
	u16 temp_max_hyst_add[2];	/* Register value */
	u8 fan_div[3];		/* Register encoding, shifted right */
	u8 vid;			/* Register encoding, combined */
	u32 alarms;		/* Register encoding, combined */
	u32 beep_mask;		/* Register encoding, combined */
	u8 pwm[4];		/* Register value */
	u8 pwm2_enable;		/* Boolean */
	u16 sens[3];		/* 782D/783S only.
				   1 = pentium diode; 2 = 3904 diode;
				   4 = thermistor */
	u8 vrm;
};

static struct w83781d_data *w83781d_data_if_isa(void);
static int w83781d_alias_detect(struct i2c_client *client, u8 chipid);

static int w83781d_read_value(struct w83781d_data *data, u16 reg);
static int w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value);
static struct w83781d_data *w83781d_update_device(struct device *dev);
static void w83781d_init_device(struct device *dev);

/* following are the sysfs callback functions */
#define show_in_reg(reg) \
static ssize_t show_##reg (struct device *dev, struct device_attribute *da, \
		char *buf) \
{ \
	struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
	struct w83781d_data *data = w83781d_update_device(dev); \
	return sprintf(buf, "%ld\n", \
		       (long)IN_FROM_REG(data->reg[attr->index])); \
}
show_in_reg(in);
show_in_reg(in_min);
show_in_reg(in_max);

#define store_in_reg(REG, reg) \
static ssize_t store_in_##reg (struct device *dev, struct device_attribute \
		*da, const char *buf, size_t count) \
{ \
	struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
	struct w83781d_data *data = dev_get_drvdata(dev); \
	int nr = attr->index; \
	u32 val; \
	 \
	val = simple_strtoul(buf, NULL, 10); \
	 \
	mutex_lock(&data->update_lock); \
	data->in_##reg[nr] = IN_TO_REG(val); \
	w83781d_write_value(data, W83781D_REG_IN_##REG(nr), data->in_##reg[nr]); \
	 \
	mutex_unlock(&data->update_lock); \
	return count; \
}
store_in_reg(MIN, min);
store_in_reg(MAX, max);

#define sysfs_in_offsets(offset) \
static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
		show_in, NULL, offset); \
static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
		show_in_min, store_in_min, offset); \
static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
		show_in_max, store_in_max, offset)

sysfs_in_offsets(0);
sysfs_in_offsets(1);
sysfs_in_offsets(2);
sysfs_in_offsets(3);
sysfs_in_offsets(4);
sysfs_in_offsets(5);
sysfs_in_offsets(6);
sysfs_in_offsets(7);
sysfs_in_offsets(8);

#define show_fan_reg(reg) \
static ssize_t show_##reg (struct device *dev, struct device_attribute *da, \
		char *buf) \
{ \
	struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
	struct w83781d_data *data = w83781d_update_device(dev); \
	return sprintf(buf,"%ld\n", \
		FAN_FROM_REG(data->reg[attr->index], \
			DIV_FROM_REG(data->fan_div[attr->index]))); \
}
show_fan_reg(fan);
show_fan_reg(fan_min);

static ssize_t
store_fan_min(struct device *dev, struct device_attribute *da,
		const char *buf, size_t count)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
	struct w83781d_data *data = dev_get_drvdata(dev);
	int nr = attr->index;
	u32 val;

	val = simple_strtoul(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	data->fan_min[nr] =
	    FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
	w83781d_write_value(data, W83781D_REG_FAN_MIN(nr),
			    data->fan_min[nr]);

	mutex_unlock(&data->update_lock);
	return count;
}

static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
		show_fan_min, store_fan_min, 0);
static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
		show_fan_min, store_fan_min, 1);
static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO | S_IWUSR,
		show_fan_min, store_fan_min, 2);

#define show_temp_reg(reg) \
static ssize_t show_##reg (struct device *dev, struct device_attribute *da, \
		char *buf) \
{ \
	struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
	struct w83781d_data *data = w83781d_update_device(dev); \
	int nr = attr->index; \
	if (nr >= 2) {	/* TEMP2 and TEMP3 */ \
		return sprintf(buf,"%d\n", \
			LM75_TEMP_FROM_REG(data->reg##_add[nr-2])); \
	} else {	/* TEMP1 */ \
		return sprintf(buf,"%ld\n", (long)TEMP_FROM_REG(data->reg)); \
	} \
}
show_temp_reg(temp);
show_temp_reg(temp_max);
show_temp_reg(temp_max_hyst);

#define store_temp_reg(REG, reg) \
static ssize_t store_temp_##reg (struct device *dev, \
		struct device_attribute *da, const char *buf, size_t count) \
{ \
	struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
	struct w83781d_data *data = dev_get_drvdata(dev); \
	int nr = attr->index; \
	long val; \
	 \
	val = simple_strtol(buf, NULL, 10); \
	 \
	mutex_lock(&data->update_lock); \
	 \
	if (nr >= 2) {	/* TEMP2 and TEMP3 */ \
		data->temp_##reg##_add[nr-2] = LM75_TEMP_TO_REG(val); \
		w83781d_write_value(data, W83781D_REG_TEMP_##REG(nr), \
				data->temp_##reg##_add[nr-2]); \
	} else {	/* TEMP1 */ \
		data->temp_##reg = TEMP_TO_REG(val); \
		w83781d_write_value(data, W83781D_REG_TEMP_##REG(nr), \
			data->temp_##reg); \
	} \
	 \
	mutex_unlock(&data->update_lock); \
	return count; \
}
store_temp_reg(OVER, max);
store_temp_reg(HYST, max_hyst);

#define sysfs_temp_offsets(offset) \
static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
		show_temp, NULL, offset); \
static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
		show_temp_max, store_temp_max, offset); \
static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
		show_temp_max_hyst, store_temp_max_hyst, offset);

sysfs_temp_offsets(1);
sysfs_temp_offsets(2);
sysfs_temp_offsets(3);

static ssize_t
show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct w83781d_data *data = w83781d_update_device(dev);
	return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
}

static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);

static ssize_t
show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct w83781d_data *data = dev_get_drvdata(dev);
	return sprintf(buf, "%ld\n", (long) data->vrm);
}

static ssize_t
store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	struct w83781d_data *data = dev_get_drvdata(dev);
	u32 val;

	val = simple_strtoul(buf, NULL, 10);
	data->vrm = val;

	return count;
}

static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);

static ssize_t
show_alarms_reg(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct w83781d_data *data = w83781d_update_device(dev);
	return sprintf(buf, "%u\n", data->alarms);
}

static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);

static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
		char *buf)
{
	struct w83781d_data *data = w83781d_update_device(dev);
	int bitnr = to_sensor_dev_attr(attr)->index;
	return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
}

/* The W83781D has a single alarm bit for temp2 and temp3 */
static ssize_t show_temp3_alarm(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct w83781d_data *data = w83781d_update_device(dev);
	int bitnr = (data->type == w83781d) ? 5 : 13;
	return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
}

static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10);
static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 16);
static SENSOR_DEVICE_ATTR(in8_alarm, S_IRUGO, show_alarm, NULL, 17);
static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11);
static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_temp3_alarm, NULL, 0);

static ssize_t show_beep_mask (struct device *dev, struct device_attribute *attr, char *buf)
{
	struct w83781d_data *data = w83781d_update_device(dev);
	return sprintf(buf, "%ld\n",
		       (long)BEEP_MASK_FROM_REG(data->beep_mask, data->type));
}

static ssize_t
store_beep_mask(struct device *dev, struct device_attribute *attr,
		const char *buf, size_t count)
{
	struct w83781d_data *data = dev_get_drvdata(dev);
	u32 val;

	val = simple_strtoul(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	data->beep_mask &= 0x8000; /* preserve beep enable */
	data->beep_mask |= BEEP_MASK_TO_REG(val, data->type);
	w83781d_write_value(data, W83781D_REG_BEEP_INTS1,
			    data->beep_mask & 0xff);
	w83781d_write_value(data, W83781D_REG_BEEP_INTS2,
			    (data->beep_mask >> 8) & 0xff);
	if (data->type != w83781d && data->type != as99127f) {
		w83781d_write_value(data, W83781D_REG_BEEP_INTS3,
				    ((data->beep_mask) >> 16) & 0xff);
	}
	mutex_unlock(&data->update_lock);

	return count;
}

static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
		show_beep_mask, store_beep_mask);

static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
		char *buf)
{
	struct w83781d_data *data = w83781d_update_device(dev);
	int bitnr = to_sensor_dev_attr(attr)->index;
	return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
}

static ssize_t
store_beep(struct device *dev, struct device_attribute *attr,
		const char *buf, size_t count)
{
	struct w83781d_data *data = dev_get_drvdata(dev);
	int bitnr = to_sensor_dev_attr(attr)->index;
	unsigned long bit;
	u8 reg;

	bit = simple_strtoul(buf, NULL, 10);
	if (bit & ~1)
		return -EINVAL;

	mutex_lock(&data->update_lock);
	if (bit)
		data->beep_mask |= (1 << bitnr);
	else
		data->beep_mask &= ~(1 << bitnr);

	if (bitnr < 8) {
		reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS1);
		if (bit)
			reg |= (1 << bitnr);
		else
			reg &= ~(1 << bitnr);
		w83781d_write_value(data, W83781D_REG_BEEP_INTS1, reg);
	} else if (bitnr < 16) {
		reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS2);
		if (bit)
			reg |= (1 << (bitnr - 8));
		else
			reg &= ~(1 << (bitnr - 8));
		w83781d_write_value(data, W83781D_REG_BEEP_INTS2, reg);
	} else {
		reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS3);
		if (bit)
			reg |= (1 << (bitnr - 16));
		else
			reg &= ~(1 << (bitnr - 16));
		w83781d_write_value(data, W83781D_REG_BEEP_INTS3, reg);
	}
	mutex_unlock(&data->update_lock);

	return count;
}

/* The W83781D has a single beep bit for temp2 and temp3 */
static ssize_t show_temp3_beep(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct w83781d_data *data = w83781d_update_device(dev);
	int bitnr = (data->type == w83781d) ? 5 : 13;
	return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
}

static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
			show_beep, store_beep, 0);
static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR,
			show_beep, store_beep, 1);
static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR,
			show_beep, store_beep, 2);
static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR,
			show_beep, store_beep, 3);
static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR,
			show_beep, store_beep, 8);
static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO | S_IWUSR,
			show_beep, store_beep, 9);
static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO | S_IWUSR,
			show_beep, store_beep, 10);
static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO | S_IWUSR,
			show_beep, store_beep, 16);
static SENSOR_DEVICE_ATTR(in8_beep, S_IRUGO | S_IWUSR,
			show_beep, store_beep, 17);
static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR,
			show_beep, store_beep, 6);
static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR,
			show_beep, store_beep, 7);
static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO | S_IWUSR,
			show_beep, store_beep, 11);
static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
			show_beep, store_beep, 4);
static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR,
			show_beep, store_beep, 5);
static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO,
			show_temp3_beep, store_beep, 13);
static SENSOR_DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
			show_beep, store_beep, 15);

static ssize_t
show_fan_div(struct device *dev, struct device_attribute *da, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
	struct w83781d_data *data = w83781d_update_device(dev);
	return sprintf(buf, "%ld\n",
		       (long) DIV_FROM_REG(data->fan_div[attr->index]));
}

/* Note: we save and restore the fan minimum here, because its value is
   determined in part by the fan divisor.  This follows the principle of
   least surprise; the user doesn't expect the fan minimum to change just
   because the divisor changed. */
static ssize_t
store_fan_div(struct device *dev, struct device_attribute *da,
		const char *buf, size_t count)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
	struct w83781d_data *data = dev_get_drvdata(dev);
	unsigned long min;
	int nr = attr->index;
	u8 reg;
	unsigned long val = simple_strtoul(buf, NULL, 10);

	mutex_lock(&data->update_lock);

	/* Save fan_min */
	min = FAN_FROM_REG(data->fan_min[nr],
			   DIV_FROM_REG(data->fan_div[nr]));

	data->fan_div[nr] = DIV_TO_REG(val, data->type);

	reg = (w83781d_read_value(data, nr==2 ? W83781D_REG_PIN : W83781D_REG_VID_FANDIV)
	       & (nr==0 ? 0xcf : 0x3f))
	    | ((data->fan_div[nr] & 0x03) << (nr==0 ? 4 : 6));
	w83781d_write_value(data, nr==2 ? W83781D_REG_PIN : W83781D_REG_VID_FANDIV, reg);

	/* w83781d and as99127f don't have extended divisor bits */
	if (data->type != w83781d && data->type != as99127f) {
		reg = (w83781d_read_value(data, W83781D_REG_VBAT)
		       & ~(1 << (5 + nr)))
		    | ((data->fan_div[nr] & 0x04) << (3 + nr));
		w83781d_write_value(data, W83781D_REG_VBAT, reg);
	}

	/* Restore fan_min */
	data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
	w83781d_write_value(data, W83781D_REG_FAN_MIN(nr), data->fan_min[nr]);

	mutex_unlock(&data->update_lock);
	return count;
}

static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
		show_fan_div, store_fan_div, 0);
static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
		show_fan_div, store_fan_div, 1);
static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR,
		show_fan_div, store_fan_div, 2);

static ssize_t
show_pwm(struct device *dev, struct device_attribute *da, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
	struct w83781d_data *data = w83781d_update_device(dev);
	return sprintf(buf, "%d\n", (int)data->pwm[attr->index]);
}

static ssize_t
show_pwm2_enable(struct device *dev, struct device_attribute *da, char *buf)
{
	struct w83781d_data *data = w83781d_update_device(dev);
	return sprintf(buf, "%d\n", (int)data->pwm2_enable);
}

static ssize_t
store_pwm(struct device *dev, struct device_attribute *da, const char *buf,
		size_t count)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
	struct w83781d_data *data = dev_get_drvdata(dev);
	int nr = attr->index;
	u32 val;

	val = simple_strtoul(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	data->pwm[nr] = SENSORS_LIMIT(val, 0, 255);
	w83781d_write_value(data, W83781D_REG_PWM[nr], data->pwm[nr]);
	mutex_unlock(&data->update_lock);
	return count;
}

static ssize_t
store_pwm2_enable(struct device *dev, struct device_attribute *da,
		const char *buf, size_t count)
{
	struct w83781d_data *data = dev_get_drvdata(dev);
	u32 val, reg;

	val = simple_strtoul(buf, NULL, 10);

	mutex_lock(&data->update_lock);

	switch (val) {
	case 0:
	case 1:
		reg = w83781d_read_value(data, W83781D_REG_PWMCLK12);
		w83781d_write_value(data, W83781D_REG_PWMCLK12,
				    (reg & 0xf7) | (val << 3));

		reg = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
		w83781d_write_value(data, W83781D_REG_BEEP_CONFIG,
				    (reg & 0xef) | (!val << 4));

		data->pwm2_enable = val;
		break;

	default:
		mutex_unlock(&data->update_lock);
		return -EINVAL;
	}

	mutex_unlock(&data->update_lock);
	return count;
}

static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0);
static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 1);
static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 2);
static SENSOR_DEVICE_ATTR(pwm4, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 3);
/* only PWM2 can be enabled/disabled */
static DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR,
		show_pwm2_enable, store_pwm2_enable);

static ssize_t
show_sensor(struct device *dev, struct device_attribute *da, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
	struct w83781d_data *data = w83781d_update_device(dev);
	return sprintf(buf, "%d\n", (int)data->sens[attr->index]);
}

static ssize_t
store_sensor(struct device *dev, struct device_attribute *da,
		const char *buf, size_t count)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
	struct w83781d_data *data = dev_get_drvdata(dev);
	int nr = attr->index;
	u32 val, tmp;

	val = simple_strtoul(buf, NULL, 10);

	mutex_lock(&data->update_lock);

	switch (val) {
	case 1:		/* PII/Celeron diode */
		tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
		w83781d_write_value(data, W83781D_REG_SCFG1,
				    tmp | BIT_SCFG1[nr]);
		tmp = w83781d_read_value(data, W83781D_REG_SCFG2);
		w83781d_write_value(data, W83781D_REG_SCFG2,
				    tmp | BIT_SCFG2[nr]);
		data->sens[nr] = val;
		break;
	case 2:		/* 3904 */
		tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
		w83781d_write_value(data, W83781D_REG_SCFG1,
				    tmp | BIT_SCFG1[nr]);
		tmp = w83781d_read_value(data, W83781D_REG_SCFG2);
		w83781d_write_value(data, W83781D_REG_SCFG2,
				    tmp & ~BIT_SCFG2[nr]);
		data->sens[nr] = val;
		break;
	case W83781D_DEFAULT_BETA:
		dev_warn(dev, "Sensor type %d is deprecated, please use 4 "
			 "instead\n", W83781D_DEFAULT_BETA);
		/* fall through */
	case 4:		/* thermistor */
		tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
		w83781d_write_value(data, W83781D_REG_SCFG1,
				    tmp & ~BIT_SCFG1[nr]);
		data->sens[nr] = val;
		break;
	default:
		dev_err(dev, "Invalid sensor type %ld; must be 1, 2, or 4\n",
		       (long) val);
		break;
	}

	mutex_unlock(&data->update_lock);
	return count;
}

static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR,
	show_sensor, store_sensor, 0);
static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR,
	show_sensor, store_sensor, 1);
static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR,
	show_sensor, store_sensor, 2);

/* Assumes that adapter is of I2C, not ISA variety.
 * OTHERWISE DON'T CALL THIS
 */
static int
w83781d_detect_subclients(struct i2c_client *new_client)
{
	int i, val1 = 0, id;
	int err;
	int address = new_client->addr;
	unsigned short sc_addr[2];
	struct i2c_adapter *adapter = new_client->adapter;
	struct w83781d_data *data = i2c_get_clientdata(new_client);
	enum chips kind = data->type;

	id = i2c_adapter_id(adapter);

	if (force_subclients[0] == id && force_subclients[1] == address) {
		for (i = 2; i <= 3; i++) {
			if (force_subclients[i] < 0x48 ||
			    force_subclients[i] > 0x4f) {
				dev_err(&new_client->dev, "Invalid subclient "
					"address %d; must be 0x48-0x4f\n",
					force_subclients[i]);
				err = -EINVAL;
				goto ERROR_SC_1;
			}
		}
		w83781d_write_value(data, W83781D_REG_I2C_SUBADDR,
				(force_subclients[2] & 0x07) |
				((force_subclients[3] & 0x07) << 4));
		sc_addr[0] = force_subclients[2];
	} else {
		val1 = w83781d_read_value(data, W83781D_REG_I2C_SUBADDR);
		sc_addr[0] = 0x48 + (val1 & 0x07);
	}

	if (kind != w83783s) {
		if (force_subclients[0] == id &&
		    force_subclients[1] == address) {
			sc_addr[1] = force_subclients[3];
		} else {
			sc_addr[1] = 0x48 + ((val1 >> 4) & 0x07);
		}
		if (sc_addr[0] == sc_addr[1]) {
			dev_err(&new_client->dev,
			       "Duplicate addresses 0x%x for subclients.\n",
			       sc_addr[0]);
			err = -EBUSY;
			goto ERROR_SC_2;
		}
	}

	for (i = 0; i <= 1; i++) {
		data->lm75[i] = i2c_new_dummy(adapter, sc_addr[i]);
		if (!data->lm75[i]) {
			dev_err(&new_client->dev, "Subclient %d "
				"registration at address 0x%x "
				"failed.\n", i, sc_addr[i]);
			err = -ENOMEM;
			if (i == 1)
				goto ERROR_SC_3;
			goto ERROR_SC_2;
		}
		if (kind == w83783s)
			break;
	}

	return 0;

/* Undo inits in case of errors */
ERROR_SC_3:
	i2c_unregister_device(data->lm75[0]);
ERROR_SC_2:
ERROR_SC_1:
	return err;
}

#define IN_UNIT_ATTRS(X)					\
	&sensor_dev_attr_in##X##_input.dev_attr.attr,		\
	&sensor_dev_attr_in##X##_min.dev_attr.attr,		\
	&sensor_dev_attr_in##X##_max.dev_attr.attr,		\
	&sensor_dev_attr_in##X##_alarm.dev_attr.attr,		\
	&sensor_dev_attr_in##X##_beep.dev_attr.attr

#define FAN_UNIT_ATTRS(X)					\
	&sensor_dev_attr_fan##X##_input.dev_attr.attr,		\
	&sensor_dev_attr_fan##X##_min.dev_attr.attr,		\
	&sensor_dev_attr_fan##X##_div.dev_attr.attr,		\
	&sensor_dev_attr_fan##X##_alarm.dev_attr.attr,		\
	&sensor_dev_attr_fan##X##_beep.dev_attr.attr

#define TEMP_UNIT_ATTRS(X)					\
	&sensor_dev_attr_temp##X##_input.dev_attr.attr,		\
	&sensor_dev_attr_temp##X##_max.dev_attr.attr,		\
	&sensor_dev_attr_temp##X##_max_hyst.dev_attr.attr,	\
	&sensor_dev_attr_temp##X##_alarm.dev_attr.attr,		\
	&sensor_dev_attr_temp##X##_beep.dev_attr.attr

static struct attribute* w83781d_attributes[] = {
	IN_UNIT_ATTRS(0),
	IN_UNIT_ATTRS(2),
	IN_UNIT_ATTRS(3),
	IN_UNIT_ATTRS(4),
	IN_UNIT_ATTRS(5),
	IN_UNIT_ATTRS(6),
	FAN_UNIT_ATTRS(1),
	FAN_UNIT_ATTRS(2),
	FAN_UNIT_ATTRS(3),
	TEMP_UNIT_ATTRS(1),
	TEMP_UNIT_ATTRS(2),
	&dev_attr_cpu0_vid.attr,
	&dev_attr_vrm.attr,
	&dev_attr_alarms.attr,
	&dev_attr_beep_mask.attr,
	&sensor_dev_attr_beep_enable.dev_attr.attr,
	NULL
};
static const struct attribute_group w83781d_group = {
	.attrs = w83781d_attributes,
};

static struct attribute *w83781d_attributes_opt[] = {
	IN_UNIT_ATTRS(1),
	IN_UNIT_ATTRS(7),
	IN_UNIT_ATTRS(8),
	TEMP_UNIT_ATTRS(3),
	&sensor_dev_attr_pwm1.dev_attr.attr,
	&sensor_dev_attr_pwm2.dev_attr.attr,
	&sensor_dev_attr_pwm3.dev_attr.attr,
	&sensor_dev_attr_pwm4.dev_attr.attr,
	&dev_attr_pwm2_enable.attr,
	&sensor_dev_attr_temp1_type.dev_attr.attr,
	&sensor_dev_attr_temp2_type.dev_attr.attr,
	&sensor_dev_attr_temp3_type.dev_attr.attr,
	NULL
};
static const struct attribute_group w83781d_group_opt = {
	.attrs = w83781d_attributes_opt,
};

/* No clean up is done on error, it's up to the caller */
static int
w83781d_create_files(struct device *dev, int kind, int is_isa)
{
	int err;

	if ((err = sysfs_create_group(&dev->kobj, &w83781d_group)))
		return err;

	if (kind != w83783s) {
		if ((err = device_create_file(dev,
				&sensor_dev_attr_in1_input.dev_attr))
		    || (err = device_create_file(dev,
				&sensor_dev_attr_in1_min.dev_attr))
		    || (err = device_create_file(dev,
				&sensor_dev_attr_in1_max.dev_attr))
		    || (err = device_create_file(dev,
				&sensor_dev_attr_in1_alarm.dev_attr))
		    || (err = device_create_file(dev,
				&sensor_dev_attr_in1_beep.dev_attr)))
			return err;
	}
	if (kind != as99127f && kind != w83781d && kind != w83783s) {
		if ((err = device_create_file(dev,
				&sensor_dev_attr_in7_input.dev_attr))
		    || (err = device_create_file(dev,
				&sensor_dev_attr_in7_min.dev_attr))
		    || (err = device_create_file(dev,
				&sensor_dev_attr_in7_max.dev_attr))
		    || (err = device_create_file(dev,
				&sensor_dev_attr_in7_alarm.dev_attr))
		    || (err = device_create_file(dev,
				&sensor_dev_attr_in7_beep.dev_attr))
		    || (err = device_create_file(dev,
				&sensor_dev_attr_in8_input.dev_attr))
		    || (err = device_create_file(dev,
				&sensor_dev_attr_in8_min.dev_attr))
		    || (err = device_create_file(dev,
				&sensor_dev_attr_in8_max.dev_attr))
		    || (err = device_create_file(dev,
				&sensor_dev_attr_in8_alarm.dev_attr))
		    || (err = device_create_file(dev,
				&sensor_dev_attr_in8_beep.dev_attr)))
			return err;
	}
	if (kind != w83783s) {
		if ((err = device_create_file(dev,
				&sensor_dev_attr_temp3_input.dev_attr))
		    || (err = device_create_file(dev,
				&sensor_dev_attr_temp3_max.dev_attr))
		    || (err = device_create_file(dev,
				&sensor_dev_attr_temp3_max_hyst.dev_attr))
		    || (err = device_create_file(dev,
				&sensor_dev_attr_temp3_alarm.dev_attr))
		    || (err = device_create_file(dev,
				&sensor_dev_attr_temp3_beep.dev_attr)))
			return err;

		if (kind != w83781d) {
			err = sysfs_chmod_file(&dev->kobj,
				&sensor_dev_attr_temp3_alarm.dev_attr.attr,
				S_IRUGO | S_IWUSR);
			if (err)
				return err;
		}
	}

	if (kind != w83781d && kind != as99127f) {
		if ((err = device_create_file(dev,
				&sensor_dev_attr_pwm1.dev_attr))
		    || (err = device_create_file(dev,
				&sensor_dev_attr_pwm2.dev_attr))
		    || (err = device_create_file(dev, &dev_attr_pwm2_enable)))
			return err;
	}
	if (kind == w83782d && !is_isa) {
		if ((err = device_create_file(dev,
				&sensor_dev_attr_pwm3.dev_attr))
		    || (err = device_create_file(dev,
				&sensor_dev_attr_pwm4.dev_attr)))
			return err;
	}

	if (kind != as99127f && kind != w83781d) {
		if ((err = device_create_file(dev,
				&sensor_dev_attr_temp1_type.dev_attr))
		    || (err = device_create_file(dev,
				&sensor_dev_attr_temp2_type.dev_attr)))
			return err;
		if (kind != w83783s) {
			if ((err = device_create_file(dev,
					&sensor_dev_attr_temp3_type.dev_attr)))
				return err;
		}
	}

	return 0;
}

/* Return 0 if detection is successful, -ENODEV otherwise */
static int
w83781d_detect(struct i2c_client *client, int kind,
	       struct i2c_board_info *info)
{
	int val1 = 0, val2;
	struct w83781d_data *isa = w83781d_data_if_isa();
	struct i2c_adapter *adapter = client->adapter;
	int address = client->addr;
	const char *client_name = "";
	enum vendor { winbond, asus } vendid;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return -ENODEV;

	/* We block updates of the ISA device to minimize the risk of
	   concurrent access to the same W83781D chip through different
	   interfaces. */
	if (isa)
		mutex_lock(&isa->update_lock);

	/* The w8378?d may be stuck in some other bank than bank 0. This may
	   make reading other information impossible. Specify a force=... or
	   force_*=... parameter, and the Winbond will be reset to the right
	   bank. */
	if (kind < 0) {
		if (i2c_smbus_read_byte_data
		    (client, W83781D_REG_CONFIG) & 0x80) {
			dev_dbg(&adapter->dev, "Detection of w83781d chip "
				"failed at step 3\n");
			goto err_nodev;
		}
		val1 = i2c_smbus_read_byte_data(client, W83781D_REG_BANK);
		val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN);
		/* Check for Winbond or Asus ID if in bank 0 */
		if ((!(val1 & 0x07)) &&
		    (((!(val1 & 0x80)) && (val2 != 0xa3) && (val2 != 0xc3))
		     || ((val1 & 0x80) && (val2 != 0x5c) && (val2 != 0x12)))) {
			dev_dbg(&adapter->dev, "Detection of w83781d chip "
				"failed at step 4\n");
			goto err_nodev;
		}
		/* If Winbond SMBus, check address at 0x48.
		   Asus doesn't support, except for as99127f rev.2 */
		if ((!(val1 & 0x80) && (val2 == 0xa3)) ||
		    ((val1 & 0x80) && (val2 == 0x5c))) {
			if (i2c_smbus_read_byte_data
			    (client, W83781D_REG_I2C_ADDR) != address) {
				dev_dbg(&adapter->dev, "Detection of w83781d "
					"chip failed at step 5\n");
				goto err_nodev;
			}
		}
	}

	/* We have either had a force parameter, or we have already detected the
	   Winbond. Put it now into bank 0 and Vendor ID High Byte */
	i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
		(i2c_smbus_read_byte_data(client, W83781D_REG_BANK)
		 & 0x78) | 0x80);

	/* Determine the chip type. */
	if (kind <= 0) {
		/* get vendor ID */
		val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN);
		if (val2 == 0x5c)
			vendid = winbond;
		else if (val2 == 0x12)
			vendid = asus;
		else {
			dev_dbg(&adapter->dev, "w83781d chip vendor is "
				"neither Winbond nor Asus\n");
			goto err_nodev;
		}

		val1 = i2c_smbus_read_byte_data(client, W83781D_REG_WCHIPID);
		if ((val1 == 0x10 || val1 == 0x11) && vendid == winbond)
			kind = w83781d;
		else if (val1 == 0x30 && vendid == winbond)
			kind = w83782d;
		else if (val1 == 0x40 && vendid == winbond && address == 0x2d)
			kind = w83783s;
		else if (val1 == 0x31)
			kind = as99127f;
		else {
			if (kind == 0)
				dev_warn(&adapter->dev, "Ignoring 'force' "
					 "parameter for unknown chip at "
					 "address 0x%02x\n", address);
			goto err_nodev;
		}

		if ((kind == w83781d || kind == w83782d)
		 && w83781d_alias_detect(client, val1)) {
			dev_dbg(&adapter->dev, "Device at 0x%02x appears to "
				"be the same as ISA device\n", address);
			goto err_nodev;
		}
	}

	if (isa)
		mutex_unlock(&isa->update_lock);

	if (kind == w83781d) {
		client_name = "w83781d";
	} else if (kind == w83782d) {
		client_name = "w83782d";
	} else if (kind == w83783s) {
		client_name = "w83783s";
	} else if (kind == as99127f) {
		client_name = "as99127f";
	}

	strlcpy(info->type, client_name, I2C_NAME_SIZE);

	return 0;

 err_nodev:
	if (isa)
		mutex_unlock(&isa->update_lock);
	return -ENODEV;
}

static int
w83781d_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
	struct device *dev = &client->dev;
	struct w83781d_data *data;
	int err;

	data = kzalloc(sizeof(struct w83781d_data), GFP_KERNEL);
	if (!data) {
		err = -ENOMEM;
		goto ERROR1;
	}

	i2c_set_clientdata(client, data);
	mutex_init(&data->lock);
	mutex_init(&data->update_lock);

	data->type = id->driver_data;
	data->client = client;

	/* attach secondary i2c lm75-like clients */
	err = w83781d_detect_subclients(client);
	if (err)
		goto ERROR3;

	/* Initialize the chip */
	w83781d_init_device(dev);

	/* Register sysfs hooks */
	err = w83781d_create_files(dev, data->type, 0);
	if (err)
		goto ERROR4;

	data->hwmon_dev = hwmon_device_register(dev);
	if (IS_ERR(data->hwmon_dev)) {
		err = PTR_ERR(data->hwmon_dev);
		goto ERROR4;
	}

	return 0;

ERROR4:
	sysfs_remove_group(&dev->kobj, &w83781d_group);
	sysfs_remove_group(&dev->kobj, &w83781d_group_opt);

	if (data->lm75[0])
		i2c_unregister_device(data->lm75[0]);
	if (data->lm75[1])
		i2c_unregister_device(data->lm75[1]);
ERROR3:
	i2c_set_clientdata(client, NULL);
	kfree(data);
ERROR1:
	return err;
}

static int
w83781d_remove(struct i2c_client *client)
{
	struct w83781d_data *data = i2c_get_clientdata(client);
	struct device *dev = &client->dev;

	hwmon_device_unregister(data->hwmon_dev);

	sysfs_remove_group(&dev->kobj, &w83781d_group);
	sysfs_remove_group(&dev->kobj, &w83781d_group_opt);

	if (data->lm75[0])
		i2c_unregister_device(data->lm75[0]);
	if (data->lm75[1])
		i2c_unregister_device(data->lm75[1]);

	i2c_set_clientdata(client, NULL);
	kfree(data);

	return 0;
}

static int
w83781d_read_value_i2c(struct w83781d_data *data, u16 reg)
{
	struct i2c_client *client = data->client;
	int res, bank;
	struct i2c_client *cl;

	bank = (reg >> 8) & 0x0f;
	if (bank > 2)
		/* switch banks */
		i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
					  bank);
	if (bank == 0 || bank > 2) {
		res = i2c_smbus_read_byte_data(client, reg & 0xff);
	} else {
		/* switch to subclient */
		cl = data->lm75[bank - 1];
		/* convert from ISA to LM75 I2C addresses */
		switch (reg & 0xff) {
		case 0x50:	/* TEMP */
			res = swab16(i2c_smbus_read_word_data(cl, 0));
			break;
		case 0x52:	/* CONFIG */
			res = i2c_smbus_read_byte_data(cl, 1);
			break;
		case 0x53:	/* HYST */
			res = swab16(i2c_smbus_read_word_data(cl, 2));
			break;
		case 0x55:	/* OVER */
		default:
			res = swab16(i2c_smbus_read_word_data(cl, 3));
			break;
		}
	}
	if (bank > 2)
		i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);

	return res;
}

static int
w83781d_write_value_i2c(struct w83781d_data *data, u16 reg, u16 value)
{
	struct i2c_client *client = data->client;
	int bank;
	struct i2c_client *cl;

	bank = (reg >> 8) & 0x0f;
	if (bank > 2)
		/* switch banks */
		i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
					  bank);
	if (bank == 0 || bank > 2) {
		i2c_smbus_write_byte_data(client, reg & 0xff,
					  value & 0xff);
	} else {
		/* switch to subclient */
		cl = data->lm75[bank - 1];
		/* convert from ISA to LM75 I2C addresses */
		switch (reg & 0xff) {
		case 0x52:	/* CONFIG */
			i2c_smbus_write_byte_data(cl, 1, value & 0xff);
			break;
		case 0x53:	/* HYST */
			i2c_smbus_write_word_data(cl, 2, swab16(value));
			break;
		case 0x55:	/* OVER */
			i2c_smbus_write_word_data(cl, 3, swab16(value));
			break;
		}
	}
	if (bank > 2)
		i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);

	return 0;
}

static void
w83781d_init_device(struct device *dev)
{
	struct w83781d_data *data = dev_get_drvdata(dev);
	int i, p;
	int type = data->type;
	u8 tmp;

	if (reset && type != as99127f) { /* this resets registers we don't have
					   documentation for on the as99127f */
		/* Resetting the chip has been the default for a long time,
		   but it causes the BIOS initializations (fan clock dividers,
		   thermal sensor types...) to be lost, so it is now optional.
		   It might even go away if nobody reports it as being useful,
		   as I see very little reason why this would be needed at
		   all. */
		dev_info(dev, "If reset=1 solved a problem you were "
			 "having, please report!\n");

		/* save these registers */
		i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
		p = w83781d_read_value(data, W83781D_REG_PWMCLK12);
		/* Reset all except Watchdog values and last conversion values
		   This sets fan-divs to 2, among others */
		w83781d_write_value(data, W83781D_REG_CONFIG, 0x80);
		/* Restore the registers and disable power-on abnormal beep.
		   This saves FAN 1/2/3 input/output values set by BIOS. */
		w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80);
		w83781d_write_value(data, W83781D_REG_PWMCLK12, p);
		/* Disable master beep-enable (reset turns it on).
		   Individual beep_mask should be reset to off but for some reason
		   disabling this bit helps some people not get beeped */
		w83781d_write_value(data, W83781D_REG_BEEP_INTS2, 0);
	}

	/* Disable power-on abnormal beep, as advised by the datasheet.
	   Already done if reset=1. */
	if (init && !reset && type != as99127f) {
		i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
		w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80);
	}

	data->vrm = vid_which_vrm();

	if ((type != w83781d) && (type != as99127f)) {
		tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
		for (i = 1; i <= 3; i++) {
			if (!(tmp & BIT_SCFG1[i - 1])) {
				data->sens[i - 1] = 4;
			} else {
				if (w83781d_read_value
				    (data,
				     W83781D_REG_SCFG2) & BIT_SCFG2[i - 1])
					data->sens[i - 1] = 1;
				else
					data->sens[i - 1] = 2;
			}
			if (type == w83783s && i == 2)
				break;
		}
	}

	if (init && type != as99127f) {
		/* Enable temp2 */
		tmp = w83781d_read_value(data, W83781D_REG_TEMP2_CONFIG);
		if (tmp & 0x01) {
			dev_warn(dev, "Enabling temp2, readings "
				 "might not make sense\n");
			w83781d_write_value(data, W83781D_REG_TEMP2_CONFIG,
				tmp & 0xfe);
		}

		/* Enable temp3 */
		if (type != w83783s) {
			tmp = w83781d_read_value(data,
				W83781D_REG_TEMP3_CONFIG);
			if (tmp & 0x01) {
				dev_warn(dev, "Enabling temp3, "
					 "readings might not make sense\n");
				w83781d_write_value(data,
					W83781D_REG_TEMP3_CONFIG, tmp & 0xfe);
			}
		}
	}

	/* Start monitoring */
	w83781d_write_value(data, W83781D_REG_CONFIG,
			    (w83781d_read_value(data,
						W83781D_REG_CONFIG) & 0xf7)
			    | 0x01);

	/* A few vars need to be filled upon startup */
	for (i = 0; i < 3; i++) {
		data->fan_min[i] = w83781d_read_value(data,
					W83781D_REG_FAN_MIN(i));
	}

	mutex_init(&data->update_lock);
}

static struct w83781d_data *w83781d_update_device(struct device *dev)
{
	struct w83781d_data *data = dev_get_drvdata(dev);
	struct i2c_client *client = data->client;
	int i;

	mutex_lock(&data->update_lock);

	if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
	    || !data->valid) {
		dev_dbg(dev, "Starting device update\n");

		for (i = 0; i <= 8; i++) {
			if (data->type == w83783s && i == 1)
				continue;	/* 783S has no in1 */
			data->in[i] =
			    w83781d_read_value(data, W83781D_REG_IN(i));
			data->in_min[i] =
			    w83781d_read_value(data, W83781D_REG_IN_MIN(i));
			data->in_max[i] =
			    w83781d_read_value(data, W83781D_REG_IN_MAX(i));
			if ((data->type != w83782d) && (i == 6))
				break;
		}
		for (i = 0; i < 3; i++) {
			data->fan[i] =
			    w83781d_read_value(data, W83781D_REG_FAN(i));
			data->fan_min[i] =
			    w83781d_read_value(data, W83781D_REG_FAN_MIN(i));
		}
		if (data->type != w83781d && data->type != as99127f) {
			for (i = 0; i < 4; i++) {
				data->pwm[i] =
				    w83781d_read_value(data,
						       W83781D_REG_PWM[i]);
				if ((data->type != w83782d || !client->driver)
				    && i == 1)
					break;
			}
			/* Only PWM2 can be disabled */
			data->pwm2_enable = (w83781d_read_value(data,
					      W83781D_REG_PWMCLK12) & 0x08) >> 3;
		}

		data->temp = w83781d_read_value(data, W83781D_REG_TEMP(1));
		data->temp_max =
		    w83781d_read_value(data, W83781D_REG_TEMP_OVER(1));
		data->temp_max_hyst =
		    w83781d_read_value(data, W83781D_REG_TEMP_HYST(1));
		data->temp_add[0] =
		    w83781d_read_value(data, W83781D_REG_TEMP(2));
		data->temp_max_add[0] =
		    w83781d_read_value(data, W83781D_REG_TEMP_OVER(2));
		data->temp_max_hyst_add[0] =
		    w83781d_read_value(data, W83781D_REG_TEMP_HYST(2));
		if (data->type != w83783s) {
			data->temp_add[1] =
			    w83781d_read_value(data, W83781D_REG_TEMP(3));
			data->temp_max_add[1] =
			    w83781d_read_value(data,
					       W83781D_REG_TEMP_OVER(3));
			data->temp_max_hyst_add[1] =
			    w83781d_read_value(data,
					       W83781D_REG_TEMP_HYST(3));
		}
		i = w83781d_read_value(data, W83781D_REG_VID_FANDIV);
		data->vid = i & 0x0f;
		data->vid |= (w83781d_read_value(data,
					W83781D_REG_CHIPID) & 0x01) << 4;
		data->fan_div[0] = (i >> 4) & 0x03;
		data->fan_div[1] = (i >> 6) & 0x03;
		data->fan_div[2] = (w83781d_read_value(data,
					W83781D_REG_PIN) >> 6) & 0x03;
		if ((data->type != w83781d) && (data->type != as99127f)) {
			i = w83781d_read_value(data, W83781D_REG_VBAT);
			data->fan_div[0] |= (i >> 3) & 0x04;
			data->fan_div[1] |= (i >> 4) & 0x04;
			data->fan_div[2] |= (i >> 5) & 0x04;
		}
		if (data->type == w83782d) {
			data->alarms = w83781d_read_value(data,
						W83782D_REG_ALARM1)
				     | (w83781d_read_value(data,
						W83782D_REG_ALARM2) << 8)
				     | (w83781d_read_value(data,
						W83782D_REG_ALARM3) << 16);
		} else if (data->type == w83783s) {
			data->alarms = w83781d_read_value(data,
						W83782D_REG_ALARM1)
				     | (w83781d_read_value(data,
						W83782D_REG_ALARM2) << 8);
		} else {
			/* No real-time status registers, fall back to
			   interrupt status registers */
			data->alarms = w83781d_read_value(data,
						W83781D_REG_ALARM1)
				     | (w83781d_read_value(data,
						W83781D_REG_ALARM2) << 8);
		}
		i = w83781d_read_value(data, W83781D_REG_BEEP_INTS2);
		data->beep_mask = (i << 8) +
		    w83781d_read_value(data, W83781D_REG_BEEP_INTS1);
		if ((data->type != w83781d) && (data->type != as99127f)) {
			data->beep_mask |=
			    w83781d_read_value(data,
					       W83781D_REG_BEEP_INTS3) << 16;
		}
		data->last_updated = jiffies;
		data->valid = 1;
	}

	mutex_unlock(&data->update_lock);

	return data;
}

static const struct i2c_device_id w83781d_ids[] = {
	{ "w83781d", w83781d, },
	{ "w83782d", w83782d, },
	{ "w83783s", w83783s, },
	{ "as99127f", as99127f },
	{ /* LIST END */ }
};
MODULE_DEVICE_TABLE(i2c, w83781d_ids);

static struct i2c_driver w83781d_driver = {
	.class		= I2C_CLASS_HWMON,
	.driver = {
		.name = "w83781d",
	},
	.probe		= w83781d_probe,
	.remove		= w83781d_remove,
	.id_table	= w83781d_ids,
	.detect		= w83781d_detect,
	.address_data	= &addr_data,
};

/*
 * ISA related code
 */
#ifdef CONFIG_ISA

/* ISA device, if found */
static struct platform_device *pdev;

static unsigned short isa_address = 0x290;

/* I2C devices get this name attribute automatically, but for ISA devices
   we must create it by ourselves. */
static ssize_t
show_name(struct device *dev, struct device_attribute *devattr, char *buf)
{
	struct w83781d_data *data = dev_get_drvdata(dev);
	return sprintf(buf, "%s\n", data->name);
}
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);

static struct w83781d_data *w83781d_data_if_isa(void)
{
	return pdev ? platform_get_drvdata(pdev) : NULL;
}

/* Returns 1 if the I2C chip appears to be an alias of the ISA chip */
static int w83781d_alias_detect(struct i2c_client *client, u8 chipid)
{
	struct w83781d_data *isa;
	int i;

	if (!pdev)	/* No ISA chip */
		return 0;

	isa = platform_get_drvdata(pdev);

	if (w83781d_read_value(isa, W83781D_REG_I2C_ADDR) != client->addr)
		return 0;	/* Address doesn't match */
	if (w83781d_read_value(isa, W83781D_REG_WCHIPID) != chipid)
		return 0;	/* Chip type doesn't match */

	/* We compare all the limit registers, the config register and the
	 * interrupt mask registers */
	for (i = 0x2b; i <= 0x3d; i++) {
		if (w83781d_read_value(isa, i) !=
		    i2c_smbus_read_byte_data(client, i))
			return 0;
	}
	if (w83781d_read_value(isa, W83781D_REG_CONFIG) !=
	    i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG))
		return 0;
	for (i = 0x43; i <= 0x46; i++) {
		if (w83781d_read_value(isa, i) !=
		    i2c_smbus_read_byte_data(client, i))
			return 0;
	}

	return 1;
}

static int
w83781d_read_value_isa(struct w83781d_data *data, u16 reg)
{
	int word_sized, res;

	word_sized = (((reg & 0xff00) == 0x100)
		      || ((reg & 0xff00) == 0x200))
	    && (((reg & 0x00ff) == 0x50)
		|| ((reg & 0x00ff) == 0x53)
		|| ((reg & 0x00ff) == 0x55));
	if (reg & 0xff00) {
		outb_p(W83781D_REG_BANK,
		       data->isa_addr + W83781D_ADDR_REG_OFFSET);
		outb_p(reg >> 8,
		       data->isa_addr + W83781D_DATA_REG_OFFSET);
	}
	outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET);
	res = inb_p(data->isa_addr + W83781D_DATA_REG_OFFSET);
	if (word_sized) {
		outb_p((reg & 0xff) + 1,
		       data->isa_addr + W83781D_ADDR_REG_OFFSET);
		res =
		    (res << 8) + inb_p(data->isa_addr +
				       W83781D_DATA_REG_OFFSET);
	}
	if (reg & 0xff00) {
		outb_p(W83781D_REG_BANK,
		       data->isa_addr + W83781D_ADDR_REG_OFFSET);
		outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET);
	}
	return res;
}

static void
w83781d_write_value_isa(struct w83781d_data *data, u16 reg, u16 value)
{
	int word_sized;

	word_sized = (((reg & 0xff00) == 0x100)
		      || ((reg & 0xff00) == 0x200))
	    && (((reg & 0x00ff) == 0x53)
		|| ((reg & 0x00ff) == 0x55));
	if (reg & 0xff00) {
		outb_p(W83781D_REG_BANK,
		       data->isa_addr + W83781D_ADDR_REG_OFFSET);
		outb_p(reg >> 8,
		       data->isa_addr + W83781D_DATA_REG_OFFSET);
	}
	outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET);
	if (word_sized) {
		outb_p(value >> 8,
		       data->isa_addr + W83781D_DATA_REG_OFFSET);
		outb_p((reg & 0xff) + 1,
		       data->isa_addr + W83781D_ADDR_REG_OFFSET);
	}
	outb_p(value & 0xff, data->isa_addr + W83781D_DATA_REG_OFFSET);
	if (reg & 0xff00) {
		outb_p(W83781D_REG_BANK,
		       data->isa_addr + W83781D_ADDR_REG_OFFSET);
		outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET);
	}
}

/* The SMBus locks itself, usually, but nothing may access the Winbond between
   bank switches. ISA access must always be locked explicitly!
   We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks,
   would slow down the W83781D access and should not be necessary.
   There are some ugly typecasts here, but the good news is - they should
   nowhere else be necessary! */
static int
w83781d_read_value(struct w83781d_data *data, u16 reg)
{
	struct i2c_client *client = data->client;
	int res;

	mutex_lock(&data->lock);
	if (client)
		res = w83781d_read_value_i2c(data, reg);
	else
		res = w83781d_read_value_isa(data, reg);
	mutex_unlock(&data->lock);
	return res;
}

static int
w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value)
{
	struct i2c_client *client = data->client;

	mutex_lock(&data->lock);
	if (client)
		w83781d_write_value_i2c(data, reg, value);
	else
		w83781d_write_value_isa(data, reg, value);
	mutex_unlock(&data->lock);
	return 0;
}

static int __devinit
w83781d_isa_probe(struct platform_device *pdev)
{
	int err, reg;
	struct w83781d_data *data;
	struct resource *res;

	/* Reserve the ISA region */
	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
	if (!request_region(res->start + W83781D_ADDR_REG_OFFSET, 2,
			    "w83781d")) {
		err = -EBUSY;
		goto exit;
	}

	data = kzalloc(sizeof(struct w83781d_data), GFP_KERNEL);
	if (!data) {
		err = -ENOMEM;
		goto exit_release_region;
	}
	mutex_init(&data->lock);
	data->isa_addr = res->start;
	platform_set_drvdata(pdev, data);

	reg = w83781d_read_value(data, W83781D_REG_WCHIPID);
	switch (reg) {
	case 0x30:
		data->type = w83782d;
		data->name = "w83782d";
		break;
	default:
		data->type = w83781d;
		data->name = "w83781d";
	}

	/* Initialize the W83781D chip */
	w83781d_init_device(&pdev->dev);

	/* Register sysfs hooks */
	err = w83781d_create_files(&pdev->dev, data->type, 1);
	if (err)
		goto exit_remove_files;

	err = device_create_file(&pdev->dev, &dev_attr_name);
	if (err)
		goto exit_remove_files;

	data->hwmon_dev = hwmon_device_register(&pdev->dev);
	if (IS_ERR(data->hwmon_dev)) {
		err = PTR_ERR(data->hwmon_dev);
		goto exit_remove_files;
	}

	return 0;

 exit_remove_files:
	sysfs_remove_group(&pdev->dev.kobj, &w83781d_group);
	sysfs_remove_group(&pdev->dev.kobj, &w83781d_group_opt);
	device_remove_file(&pdev->dev, &dev_attr_name);
	kfree(data);
 exit_release_region:
	release_region(res->start + W83781D_ADDR_REG_OFFSET, 2);
 exit:
	return err;
}

static int __devexit
w83781d_isa_remove(struct platform_device *pdev)
{
	struct w83781d_data *data = platform_get_drvdata(pdev);

	hwmon_device_unregister(data->hwmon_dev);
	sysfs_remove_group(&pdev->dev.kobj, &w83781d_group);
	sysfs_remove_group(&pdev->dev.kobj, &w83781d_group_opt);
	device_remove_file(&pdev->dev, &dev_attr_name);
	release_region(data->isa_addr + W83781D_ADDR_REG_OFFSET, 2);
	kfree(data);

	return 0;
}

static struct platform_driver w83781d_isa_driver = {
	.driver = {
		.owner = THIS_MODULE,
		.name = "w83781d",
	},
	.probe = w83781d_isa_probe,
	.remove = __devexit_p(w83781d_isa_remove),
};

/* return 1 if a supported chip is found, 0 otherwise */
static int __init
w83781d_isa_found(unsigned short address)
{
	int val, save, found = 0;

	/* We have to request the region in two parts because some
	   boards declare base+4 to base+7 as a PNP device */
	if (!request_region(address, 4, "w83781d")) {
		pr_debug("w83781d: Failed to request low part of region\n");
		return 0;
	}
	if (!request_region(address + 4, 4, "w83781d")) {
		pr_debug("w83781d: Failed to request high part of region\n");
		release_region(address, 4);
		return 0;
	}

#define REALLY_SLOW_IO
	/* We need the timeouts for at least some W83781D-like
	   chips. But only if we read 'undefined' registers. */
	val = inb_p(address + 1);
	if (inb_p(address + 2) != val
	 || inb_p(address + 3) != val
	 || inb_p(address + 7) != val) {
		pr_debug("w83781d: Detection failed at step 1\n");
		goto release;
	}
#undef REALLY_SLOW_IO

	/* We should be able to change the 7 LSB of the address port. The
	   MSB (busy flag) should be clear initially, set after the write. */
	save = inb_p(address + W83781D_ADDR_REG_OFFSET);
	if (save & 0x80) {
		pr_debug("w83781d: Detection failed at step 2\n");
		goto release;
	}
	val = ~save & 0x7f;
	outb_p(val, address + W83781D_ADDR_REG_OFFSET);
	if (inb_p(address + W83781D_ADDR_REG_OFFSET) != (val | 0x80)) {
		outb_p(save, address + W83781D_ADDR_REG_OFFSET);
		pr_debug("w83781d: Detection failed at step 3\n");
		goto release;
	}

	/* We found a device, now see if it could be a W83781D */
	outb_p(W83781D_REG_CONFIG, address + W83781D_ADDR_REG_OFFSET);
	val = inb_p(address + W83781D_DATA_REG_OFFSET);
	if (val & 0x80) {
		pr_debug("w83781d: Detection failed at step 4\n");
		goto release;
	}
	outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET);
	save = inb_p(address + W83781D_DATA_REG_OFFSET);
	outb_p(W83781D_REG_CHIPMAN, address + W83781D_ADDR_REG_OFFSET);
	val = inb_p(address + W83781D_DATA_REG_OFFSET);
	if ((!(save & 0x80) && (val != 0xa3))
	 || ((save & 0x80) && (val != 0x5c))) {
		pr_debug("w83781d: Detection failed at step 5\n");
		goto release;
	}
	outb_p(W83781D_REG_I2C_ADDR, address + W83781D_ADDR_REG_OFFSET);
	val = inb_p(address + W83781D_DATA_REG_OFFSET);
	if (val < 0x03 || val > 0x77) {	/* Not a valid I2C address */
		pr_debug("w83781d: Detection failed at step 6\n");
		goto release;
	}

	/* The busy flag should be clear again */
	if (inb_p(address + W83781D_ADDR_REG_OFFSET) & 0x80) {
		pr_debug("w83781d: Detection failed at step 7\n");
		goto release;
	}

	/* Determine the chip type */
	outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET);
	save = inb_p(address + W83781D_DATA_REG_OFFSET);
	outb_p(save & 0xf8, address + W83781D_DATA_REG_OFFSET);
	outb_p(W83781D_REG_WCHIPID, address + W83781D_ADDR_REG_OFFSET);
	val = inb_p(address + W83781D_DATA_REG_OFFSET);
	if ((val & 0xfe) == 0x10	/* W83781D */
	 || val == 0x30)		/* W83782D */
		found = 1;

	if (found)
		pr_info("w83781d: Found a %s chip at %#x\n",
			val == 0x30 ? "W83782D" : "W83781D", (int)address);

 release:
	release_region(address + 4, 4);
	release_region(address, 4);
	return found;
}

static int __init
w83781d_isa_device_add(unsigned short address)
{
	struct resource res = {
		.start	= address,
		.end	= address + W83781D_EXTENT - 1,
		.name	= "w83781d",
		.flags	= IORESOURCE_IO,
	};
	int err;

	pdev = platform_device_alloc("w83781d", address);
	if (!pdev) {
		err = -ENOMEM;
		printk(KERN_ERR "w83781d: Device allocation failed\n");
		goto exit;
	}

	err = platform_device_add_resources(pdev, &res, 1);
	if (err) {
		printk(KERN_ERR "w83781d: Device resource addition failed "
		       "(%d)\n", err);
		goto exit_device_put;
	}

	err = platform_device_add(pdev);
	if (err) {
		printk(KERN_ERR "w83781d: Device addition failed (%d)\n",
		       err);
		goto exit_device_put;
	}

	return 0;

 exit_device_put:
	platform_device_put(pdev);
 exit:
	pdev = NULL;
	return err;
}

static int __init
w83781d_isa_register(void)
{
	int res;

	if (w83781d_isa_found(isa_address)) {
		res = platform_driver_register(&w83781d_isa_driver);
		if (res)
			goto exit;

		/* Sets global pdev as a side effect */
		res = w83781d_isa_device_add(isa_address);
		if (res)
			goto exit_unreg_isa_driver;
	}

	return 0;

exit_unreg_isa_driver:
	platform_driver_unregister(&w83781d_isa_driver);
exit:
	return res;
}

static void
w83781d_isa_unregister(void)
{
	if (pdev) {
		platform_device_unregister(pdev);
		platform_driver_unregister(&w83781d_isa_driver);
	}
}
#else /* !CONFIG_ISA */

static struct w83781d_data *w83781d_data_if_isa(void)
{
	return NULL;
}

static int
w83781d_alias_detect(struct i2c_client *client, u8 chipid)
{
	return 0;
}

static int
w83781d_read_value(struct w83781d_data *data, u16 reg)
{
	int res;

	mutex_lock(&data->lock);
	res = w83781d_read_value_i2c(data, reg);
	mutex_unlock(&data->lock);

	return res;
}

static int
w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value)
{
	mutex_lock(&data->lock);
	w83781d_write_value_i2c(data, reg, value);
	mutex_unlock(&data->lock);

	return 0;
}

static int __init
w83781d_isa_register(void)
{
	return 0;
}

static void
w83781d_isa_unregister(void)
{
}
#endif /* CONFIG_ISA */

static int __init
sensors_w83781d_init(void)
{
	int res;

	/* We register the ISA device first, so that we can skip the
	 * registration of an I2C interface to the same device. */
	res = w83781d_isa_register();
	if (res)
		goto exit;

	res = i2c_add_driver(&w83781d_driver);
	if (res)
		goto exit_unreg_isa;

	return 0;

 exit_unreg_isa:
	w83781d_isa_unregister();
 exit:
	return res;
}

static void __exit
sensors_w83781d_exit(void)
{
	w83781d_isa_unregister();
	i2c_del_driver(&w83781d_driver);
}

MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
	      "Philip Edelbrock <phil@netroedge.com>, "
	      "and Mark Studebaker <mdsxyz123@yahoo.com>");
MODULE_DESCRIPTION("W83781D driver");
MODULE_LICENSE("GPL");

module_init(sensors_w83781d_init);
module_exit(sensors_w83781d_exit);

Privacy Policy