summaryrefslogtreecommitdiffstats
path: root/drivers/platform/x86/asus-wmi.c
blob: 9b18a184e0aac89c58232681bbd5ab689cae0e2f (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
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Asus PC WMI hotkey driver
 *
 * Copyright(C) 2010 Intel Corporation.
 * Copyright(C) 2010-2011 Corentin Chary <corentin.chary@gmail.com>
 *
 * Portions based on wistron_btns.c:
 * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
 * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
 * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <linux/fb.h>
#include <linux/backlight.h>
#include <linux/leds.h>
#include <linux/rfkill.h>
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/platform_data/x86/asus-wmi.h>
#include <linux/platform_device.h>
#include <linux/thermal.h>
#include <linux/acpi.h>
#include <linux/dmi.h>
#include <acpi/video.h>

#include "asus-wmi.h"

MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>, "
	      "Yong Wang <yong.y.wang@intel.com>");
MODULE_DESCRIPTION("Asus Generic WMI Driver");
MODULE_LICENSE("GPL");

#define to_asus_wmi_driver(pdrv)					\
	(container_of((pdrv), struct asus_wmi_driver, platform_driver))

#define ASUS_WMI_MGMT_GUID	"97845ED0-4E6D-11DE-8A39-0800200C9A66"

#define NOTIFY_BRNUP_MIN		0x11
#define NOTIFY_BRNUP_MAX		0x1f
#define NOTIFY_BRNDOWN_MIN		0x20
#define NOTIFY_BRNDOWN_MAX		0x2e
#define NOTIFY_FNLOCK_TOGGLE		0x4e
#define NOTIFY_KBD_BRTUP		0xc4
#define NOTIFY_KBD_BRTDWN		0xc5
#define NOTIFY_KBD_BRTTOGGLE		0xc7

#define ASUS_WMI_FNLOCK_BIOS_DISABLED	BIT(0)

#define ASUS_FAN_DESC			"cpu_fan"
#define ASUS_FAN_MFUN			0x13
#define ASUS_FAN_SFUN_READ		0x06
#define ASUS_FAN_SFUN_WRITE		0x07
#define ASUS_FAN_CTRL_MANUAL		1
#define ASUS_FAN_CTRL_AUTO		2

#define USB_INTEL_XUSB2PR		0xD0
#define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI	0x9c31

static const char * const ashs_ids[] = { "ATK4001", "ATK4002", NULL };

static bool ashs_present(void)
{
	int i = 0;
	while (ashs_ids[i]) {
		if (acpi_dev_found(ashs_ids[i++]))
			return true;
	}
	return false;
}

struct bios_args {
	u32 arg0;
	u32 arg1;
} __packed;

/*
 * Struct that's used for all methods called via AGFN. Naming is
 * identically to the AML code.
 */
struct agfn_args {
	u16 mfun; /* probably "Multi-function" to be called */
	u16 sfun; /* probably "Sub-function" to be called */
	u16 len;  /* size of the hole struct, including subfunction fields */
	u8 stas;  /* not used by now */
	u8 err;   /* zero on success */
} __packed;

/* struct used for calling fan read and write methods */
struct fan_args {
	struct agfn_args agfn;	/* common fields */
	u8 fan;			/* fan number: 0: set auto mode 1: 1st fan */
	u32 speed;		/* read: RPM/100 - write: 0-255 */
} __packed;

/*
 * <platform>/    - debugfs root directory
 *   dev_id      - current dev_id
 *   ctrl_param  - current ctrl_param
 *   method_id   - current method_id
 *   devs        - call DEVS(dev_id, ctrl_param) and print result
 *   dsts        - call DSTS(dev_id)  and print result
 *   call        - call method_id(dev_id, ctrl_param) and print result
 */
struct asus_wmi_debug {
	struct dentry *root;
	u32 method_id;
	u32 dev_id;
	u32 ctrl_param;
};

struct asus_rfkill {
	struct asus_wmi *asus;
	struct rfkill *rfkill;
	u32 dev_id;
};

struct asus_wmi {
	int dsts_id;
	int spec;
	int sfun;

	struct input_dev *inputdev;
	struct backlight_device *backlight_device;
	struct platform_device *platform_device;

	struct led_classdev wlan_led;
	int wlan_led_wk;
	struct led_classdev tpd_led;
	int tpd_led_wk;
	struct led_classdev kbd_led;
	int kbd_led_wk;
	struct led_classdev lightbar_led;
	int lightbar_led_wk;
	struct workqueue_struct *led_workqueue;
	struct work_struct tpd_led_work;
	struct work_struct wlan_led_work;
	struct work_struct lightbar_led_work;

	struct asus_rfkill wlan;
	struct asus_rfkill bluetooth;
	struct asus_rfkill wimax;
	struct asus_rfkill wwan3g;
	struct asus_rfkill gps;
	struct asus_rfkill uwb;

	bool asus_hwmon_fan_manual_mode;
	int asus_hwmon_num_fans;
	int asus_hwmon_pwm;

	struct hotplug_slot hotplug_slot;
	struct mutex hotplug_lock;
	struct mutex wmi_lock;
	struct workqueue_struct *hotplug_workqueue;
	struct work_struct hotplug_work;

	bool fnlock_locked;

	struct asus_wmi_debug debug;

	struct asus_wmi_driver *driver;
};

static int asus_wmi_input_init(struct asus_wmi *asus)
{
	int err;

	asus->inputdev = input_allocate_device();
	if (!asus->inputdev)
		return -ENOMEM;

	asus->inputdev->name = asus->driver->input_name;
	asus->inputdev->phys = asus->driver->input_phys;
	asus->inputdev->id.bustype = BUS_HOST;
	asus->inputdev->dev.parent = &asus->platform_device->dev;
	set_bit(EV_REP, asus->inputdev->evbit);

	err = sparse_keymap_setup(asus->inputdev, asus->driver->keymap, NULL);
	if (err)
		goto err_free_dev;

	err = input_register_device(asus->inputdev);
	if (err)
		goto err_free_dev;

	return 0;

err_free_dev:
	input_free_device(asus->inputdev);
	return err;
}

static void asus_wmi_input_exit(struct asus_wmi *asus)
{
	if (asus->inputdev)
		input_unregister_device(asus->inputdev);

	asus->inputdev = NULL;
}

int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1, u32 *retval)
{
	struct bios_args args = {
		.arg0 = arg0,
		.arg1 = arg1,
	};
	struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
	acpi_status status;
	union acpi_object *obj;
	u32 tmp = 0;

	status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 0, method_id,
				     &input, &output);

	if (ACPI_FAILURE(status))
		goto exit;

	obj = (union acpi_object *)output.pointer;
	if (obj && obj->type == ACPI_TYPE_INTEGER)
		tmp = (u32) obj->integer.value;

	if (retval)
		*retval = tmp;

	kfree(obj);

exit:
	if (ACPI_FAILURE(status))
		return -EIO;

	if (tmp == ASUS_WMI_UNSUPPORTED_METHOD)
		return -ENODEV;

	return 0;
}
EXPORT_SYMBOL_GPL(asus_wmi_evaluate_method);

static int asus_wmi_evaluate_method_agfn(const struct acpi_buffer args)
{
	struct acpi_buffer input;
	u64 phys_addr;
	u32 retval;
	u32 status = -1;

	/*
	 * Copy to dma capable address otherwise memory corruption occurs as
	 * bios has to be able to access it.
	 */
	input.pointer = kzalloc(args.length, GFP_DMA | GFP_KERNEL);
	input.length = args.length;
	if (!input.pointer)
		return -ENOMEM;
	phys_addr = virt_to_phys(input.pointer);
	memcpy(input.pointer, args.pointer, args.length);

	status = asus_wmi_evaluate_method(ASUS_WMI_METHODID_AGFN,
					phys_addr, 0, &retval);
	if (!status)
		memcpy(args.pointer, input.pointer, args.length);

	kfree(input.pointer);
	if (status)
		return -ENXIO;

	return retval;
}

static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval)
{
	return asus_wmi_evaluate_method(asus->dsts_id, dev_id, 0, retval);
}

static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
				 u32 *retval)
{
	return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
					ctrl_param, retval);
}

/* Helper for special devices with magic return codes */
static int asus_wmi_get_devstate_bits(struct asus_wmi *asus,
				      u32 dev_id, u32 mask)
{
	u32 retval = 0;
	int err;

	err = asus_wmi_get_devstate(asus, dev_id, &retval);

	if (err < 0)
		return err;

	if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT))
		return -ENODEV;

	if (mask == ASUS_WMI_DSTS_STATUS_BIT) {
		if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT)
			return -ENODEV;
	}

	return retval & mask;
}

static int asus_wmi_get_devstate_simple(struct asus_wmi *asus, u32 dev_id)
{
	return asus_wmi_get_devstate_bits(asus, dev_id,
					  ASUS_WMI_DSTS_STATUS_BIT);
}

/*
 * LEDs
 */
/*
 * These functions actually update the LED's, and are called from a
 * workqueue. By doing this as separate work rather than when the LED
 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
 * potentially bad time, such as a timer interrupt.
 */
static void tpd_led_update(struct work_struct *work)
{
	int ctrl_param;
	struct asus_wmi *asus;

	asus = container_of(work, struct asus_wmi, tpd_led_work);

	ctrl_param = asus->tpd_led_wk;
	asus_wmi_set_devstate(ASUS_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL);
}

static void tpd_led_set(struct led_classdev *led_cdev,
			enum led_brightness value)
{
	struct asus_wmi *asus;

	asus = container_of(led_cdev, struct asus_wmi, tpd_led);

	asus->tpd_led_wk = !!value;
	queue_work(asus->led_workqueue, &asus->tpd_led_work);
}

static int read_tpd_led_state(struct asus_wmi *asus)
{
	return asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_TOUCHPAD_LED);
}

static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
{
	struct asus_wmi *asus;

	asus = container_of(led_cdev, struct asus_wmi, tpd_led);

	return read_tpd_led_state(asus);
}

static void kbd_led_update(struct asus_wmi *asus)
{
	int ctrl_param = 0;

	/*
	 * bits 0-2: level
	 * bit 7: light on/off
	 */
	if (asus->kbd_led_wk > 0)
		ctrl_param = 0x80 | (asus->kbd_led_wk & 0x7F);

	asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL);
}

static int kbd_led_read(struct asus_wmi *asus, int *level, int *env)
{
	int retval;

	/*
	 * bits 0-2: level
	 * bit 7: light on/off
	 * bit 8-10: environment (0: dark, 1: normal, 2: light)
	 * bit 17: status unknown
	 */
	retval = asus_wmi_get_devstate_bits(asus, ASUS_WMI_DEVID_KBD_BACKLIGHT,
					    0xFFFF);

	/* Unknown status is considered as off */
	if (retval == 0x8000)
		retval = 0;

	if (retval >= 0) {
		if (level)
			*level = retval & 0x7F;
		if (env)
			*env = (retval >> 8) & 0x7F;
		retval = 0;
	}

	return retval;
}

static void do_kbd_led_set(struct led_classdev *led_cdev, int value)
{
	struct asus_wmi *asus;
	int max_level;

	asus = container_of(led_cdev, struct asus_wmi, kbd_led);
	max_level = asus->kbd_led.max_brightness;

	if (value > max_level)
		value = max_level;
	else if (value < 0)
		value = 0;

	asus->kbd_led_wk = value;
	kbd_led_update(asus);
}

static void kbd_led_set(struct led_classdev *led_cdev,
			enum led_brightness value)
{
	do_kbd_led_set(led_cdev, value);
}

static void kbd_led_set_by_kbd(struct asus_wmi *asus, enum led_brightness value)
{
	struct led_classdev *led_cdev = &asus->kbd_led;

	do_kbd_led_set(led_cdev, value);
	led_classdev_notify_brightness_hw_changed(led_cdev, asus->kbd_led_wk);
}

static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
{
	struct asus_wmi *asus;
	int retval, value;

	asus = container_of(led_cdev, struct asus_wmi, kbd_led);

	retval = kbd_led_read(asus, &value, NULL);

	if (retval < 0)
		return retval;

	return value;
}

static int wlan_led_unknown_state(struct asus_wmi *asus)
{
	u32 result;

	asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);

	return result & ASUS_WMI_DSTS_UNKNOWN_BIT;
}

static int wlan_led_presence(struct asus_wmi *asus)
{
	u32 result;

	asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);

	return result & ASUS_WMI_DSTS_PRESENCE_BIT;
}

static void wlan_led_update(struct work_struct *work)
{
	int ctrl_param;
	struct asus_wmi *asus;

	asus = container_of(work, struct asus_wmi, wlan_led_work);

	ctrl_param = asus->wlan_led_wk;
	asus_wmi_set_devstate(ASUS_WMI_DEVID_WIRELESS_LED, ctrl_param, NULL);
}

static void wlan_led_set(struct led_classdev *led_cdev,
			 enum led_brightness value)
{
	struct asus_wmi *asus;

	asus = container_of(led_cdev, struct asus_wmi, wlan_led);

	asus->wlan_led_wk = !!value;
	queue_work(asus->led_workqueue, &asus->wlan_led_work);
}

static enum led_brightness wlan_led_get(struct led_classdev *led_cdev)
{
	struct asus_wmi *asus;
	u32 result;

	asus = container_of(led_cdev, struct asus_wmi, wlan_led);
	asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);

	return result & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
}

static void lightbar_led_update(struct work_struct *work)
{
	struct asus_wmi *asus;
	int ctrl_param;

	asus = container_of(work, struct asus_wmi, lightbar_led_work);

	ctrl_param = asus->lightbar_led_wk;
	asus_wmi_set_devstate(ASUS_WMI_DEVID_LIGHTBAR, ctrl_param, NULL);
}

static void lightbar_led_set(struct led_classdev *led_cdev,
			     enum led_brightness value)
{
	struct asus_wmi *asus;

	asus = container_of(led_cdev, struct asus_wmi, lightbar_led);

	asus->lightbar_led_wk = !!value;
	queue_work(asus->led_workqueue, &asus->lightbar_led_work);
}

static enum led_brightness lightbar_led_get(struct led_classdev *led_cdev)
{
	struct asus_wmi *asus;
	u32 result;

	asus = container_of(led_cdev, struct asus_wmi, lightbar_led);
	asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_LIGHTBAR, &result);

	return result & ASUS_WMI_DSTS_LIGHTBAR_MASK;
}

static int lightbar_led_presence(struct asus_wmi *asus)
{
	u32 result;

	asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_LIGHTBAR, &result);

	return result & ASUS_WMI_DSTS_PRESENCE_BIT;
}

static void asus_wmi_led_exit(struct asus_wmi *asus)
{
	if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
		led_classdev_unregister(&asus->kbd_led);
	if (!IS_ERR_OR_NULL(asus->tpd_led.dev))
		led_classdev_unregister(&asus->tpd_led);
	if (!IS_ERR_OR_NULL(asus->wlan_led.dev))
		led_classdev_unregister(&asus->wlan_led);
	if (!IS_ERR_OR_NULL(asus->lightbar_led.dev))
		led_classdev_unregister(&asus->lightbar_led);
	if (asus->led_workqueue)
		destroy_workqueue(asus->led_workqueue);
}

static int asus_wmi_led_init(struct asus_wmi *asus)
{
	int rv = 0, led_val;

	asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
	if (!asus->led_workqueue)
		return -ENOMEM;

	if (read_tpd_led_state(asus) >= 0) {
		INIT_WORK(&asus->tpd_led_work, tpd_led_update);

		asus->tpd_led.name = "asus::touchpad";
		asus->tpd_led.brightness_set = tpd_led_set;
		asus->tpd_led.brightness_get = tpd_led_get;
		asus->tpd_led.max_brightness = 1;

		rv = led_classdev_register(&asus->platform_device->dev,
					   &asus->tpd_led);
		if (rv)
			goto error;
	}

	led_val = kbd_led_read(asus, NULL, NULL);
	if (led_val >= 0) {
		asus->kbd_led_wk = led_val;
		asus->kbd_led.name = "asus::kbd_backlight";
		asus->kbd_led.flags = LED_BRIGHT_HW_CHANGED;
		asus->kbd_led.brightness_set = kbd_led_set;
		asus->kbd_led.brightness_get = kbd_led_get;
		asus->kbd_led.max_brightness = 3;

		rv = led_classdev_register(&asus->platform_device->dev,
					   &asus->kbd_led);
		if (rv)
			goto error;
	}

	if (wlan_led_presence(asus) && (asus->driver->quirks->wapf > 0)) {
		INIT_WORK(&asus->wlan_led_work, wlan_led_update);

		asus->wlan_led.name = "asus::wlan";
		asus->wlan_led.brightness_set = wlan_led_set;
		if (!wlan_led_unknown_state(asus))
			asus->wlan_led.brightness_get = wlan_led_get;
		asus->wlan_led.flags = LED_CORE_SUSPENDRESUME;
		asus->wlan_led.max_brightness = 1;
		asus->wlan_led.default_trigger = "asus-wlan";

		rv = led_classdev_register(&asus->platform_device->dev,
					   &asus->wlan_led);
		if (rv)
			goto error;
	}

	if (lightbar_led_presence(asus)) {
		INIT_WORK(&asus->lightbar_led_work, lightbar_led_update);

		asus->lightbar_led.name = "asus::lightbar";
		asus->lightbar_led.brightness_set = lightbar_led_set;
		asus->lightbar_led.brightness_get = lightbar_led_get;
		asus->lightbar_led.max_brightness = 1;

		rv = led_classdev_register(&asus->platform_device->dev,
					   &asus->lightbar_led);
	}

error:
	if (rv)
		asus_wmi_led_exit(asus);

	return rv;
}


/*
 * PCI hotplug (for wlan rfkill)
 */
static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus)
{
	int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);

	if (result < 0)
		return false;
	return !result;
}

static void asus_rfkill_hotplug(struct asus_wmi *asus)
{
	struct pci_dev *dev;
	struct pci_bus *bus;
	bool blocked;
	bool absent;
	u32 l;

	mutex_lock(&asus->wmi_lock);
	blocked = asus_wlan_rfkill_blocked(asus);
	mutex_unlock(&asus->wmi_lock);

	mutex_lock(&asus->hotplug_lock);
	pci_lock_rescan_remove();

	if (asus->wlan.rfkill)
		rfkill_set_sw_state(asus->wlan.rfkill, blocked);

	if (asus->hotplug_slot.ops) {
		bus = pci_find_bus(0, 1);
		if (!bus) {
			pr_warn("Unable to find PCI bus 1?\n");
			goto out_unlock;
		}

		if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
			pr_err("Unable to read PCI config space?\n");
			goto out_unlock;
		}
		absent = (l == 0xffffffff);

		if (blocked != absent) {
			pr_warn("BIOS says wireless lan is %s, "
				"but the pci device is %s\n",
				blocked ? "blocked" : "unblocked",
				absent ? "absent" : "present");
			pr_warn("skipped wireless hotplug as probably "
				"inappropriate for this model\n");
			goto out_unlock;
		}

		if (!blocked) {
			dev = pci_get_slot(bus, 0);
			if (dev) {
				/* Device already present */
				pci_dev_put(dev);
				goto out_unlock;
			}
			dev = pci_scan_single_device(bus, 0);
			if (dev) {
				pci_bus_assign_resources(bus);
				pci_bus_add_device(dev);
			}
		} else {
			dev = pci_get_slot(bus, 0);
			if (dev) {
				pci_stop_and_remove_bus_device(dev);
				pci_dev_put(dev);
			}
		}
	}

out_unlock:
	pci_unlock_rescan_remove();
	mutex_unlock(&asus->hotplug_lock);
}

static void asus_rfkill_notify(acpi_handle handle, u32 event, void *data)
{
	struct asus_wmi *asus = data;

	if (event != ACPI_NOTIFY_BUS_CHECK)
		return;

	/*
	 * We can't call directly asus_rfkill_hotplug because most
	 * of the time WMBC is still being executed and not reetrant.
	 * There is currently no way to tell ACPICA that  we want this
	 * method to be serialized, we schedule a asus_rfkill_hotplug
	 * call later, in a safer context.
	 */
	queue_work(asus->hotplug_workqueue, &asus->hotplug_work);
}

static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node)
{
	acpi_status status;
	acpi_handle handle;

	status = acpi_get_handle(NULL, node, &handle);

	if (ACPI_SUCCESS(status)) {
		status = acpi_install_notify_handler(handle,
						     ACPI_SYSTEM_NOTIFY,
						     asus_rfkill_notify, asus);
		if (ACPI_FAILURE(status))
			pr_warn("Failed to register notify on %s\n", node);
	} else
		return -ENODEV;

	return 0;
}

static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node)
{
	acpi_status status = AE_OK;
	acpi_handle handle;

	status = acpi_get_handle(NULL, node, &handle);

	if (ACPI_SUCCESS(status)) {
		status = acpi_remove_notify_handler(handle,
						    ACPI_SYSTEM_NOTIFY,
						    asus_rfkill_notify);
		if (ACPI_FAILURE(status))
			pr_err("Error removing rfkill notify handler %s\n",
			       node);
	}
}

static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,
				   u8 *value)
{
	struct asus_wmi *asus = container_of(hotplug_slot,
					     struct asus_wmi, hotplug_slot);
	int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);

	if (result < 0)
		return result;

	*value = !!result;
	return 0;
}

static const struct hotplug_slot_ops asus_hotplug_slot_ops = {
	.get_adapter_status = asus_get_adapter_status,
	.get_power_status = asus_get_adapter_status,
};

static void asus_hotplug_work(struct work_struct *work)
{
	struct asus_wmi *asus;

	asus = container_of(work, struct asus_wmi, hotplug_work);
	asus_rfkill_hotplug(asus);
}

static int asus_setup_pci_hotplug(struct asus_wmi *asus)
{
	int ret = -ENOMEM;
	struct pci_bus *bus = pci_find_bus(0, 1);

	if (!bus) {
		pr_err("Unable to find wifi PCI bus\n");
		return -ENODEV;
	}

	asus->hotplug_workqueue =
	    create_singlethread_workqueue("hotplug_workqueue");
	if (!asus->hotplug_workqueue)
		goto error_workqueue;

	INIT_WORK(&asus->hotplug_work, asus_hotplug_work);

	asus->hotplug_slot.ops = &asus_hotplug_slot_ops;

	ret = pci_hp_register(&asus->hotplug_slot, bus, 0, "asus-wifi");
	if (ret) {
		pr_err("Unable to register hotplug slot - %d\n", ret);
		goto error_register;
	}

	return 0;

error_register:
	asus->hotplug_slot.ops = NULL;
	destroy_workqueue(asus->hotplug_workqueue);
error_workqueue:
	return ret;
}

/*
 * Rfkill devices
 */
static int asus_rfkill_set(void *data, bool blocked)
{
	struct asus_rfkill *priv = data;
	u32 ctrl_param = !blocked;
	u32 dev_id = priv->dev_id;

	/*
	 * If the user bit is set, BIOS can't set and record the wlan status,
	 * it will report the value read from id ASUS_WMI_DEVID_WLAN_LED
	 * while we query the wlan status through WMI(ASUS_WMI_DEVID_WLAN).
	 * So, we have to record wlan status in id ASUS_WMI_DEVID_WLAN_LED
	 * while setting the wlan status through WMI.
	 * This is also the behavior that windows app will do.
	 */
	if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
	     priv->asus->driver->wlan_ctrl_by_user)
		dev_id = ASUS_WMI_DEVID_WLAN_LED;

	return asus_wmi_set_devstate(dev_id, ctrl_param, NULL);
}

static void asus_rfkill_query(struct rfkill *rfkill, void *data)
{
	struct asus_rfkill *priv = data;
	int result;

	result = asus_wmi_get_devstate_simple(priv->asus, priv->dev_id);

	if (result < 0)
		return;

	rfkill_set_sw_state(priv->rfkill, !result);
}

static int asus_rfkill_wlan_set(void *data, bool blocked)
{
	struct asus_rfkill *priv = data;
	struct asus_wmi *asus = priv->asus;
	int ret;

	/*
	 * This handler is enabled only if hotplug is enabled.
	 * In this case, the asus_wmi_set_devstate() will
	 * trigger a wmi notification and we need to wait
	 * this call to finish before being able to call
	 * any wmi method
	 */
	mutex_lock(&asus->wmi_lock);
	ret = asus_rfkill_set(data, blocked);
	mutex_unlock(&asus->wmi_lock);
	return ret;
}

static const struct rfkill_ops asus_rfkill_wlan_ops = {
	.set_block = asus_rfkill_wlan_set,
	.query = asus_rfkill_query,
};

static const struct rfkill_ops asus_rfkill_ops = {
	.set_block = asus_rfkill_set,
	.query = asus_rfkill_query,
};

static int asus_new_rfkill(struct asus_wmi *asus,
			   struct asus_rfkill *arfkill,
			   const char *name, enum rfkill_type type, int dev_id)
{
	int result = asus_wmi_get_devstate_simple(asus, dev_id);
	struct rfkill **rfkill = &arfkill->rfkill;

	if (result < 0)
		return result;

	arfkill->dev_id = dev_id;
	arfkill->asus = asus;

	if (dev_id == ASUS_WMI_DEVID_WLAN &&
	    asus->driver->quirks->hotplug_wireless)
		*rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
				       &asus_rfkill_wlan_ops, arfkill);
	else
		*rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
				       &asus_rfkill_ops, arfkill);

	if (!*rfkill)
		return -EINVAL;

	if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
			(asus->driver->quirks->wapf > 0))
		rfkill_set_led_trigger_name(*rfkill, "asus-wlan");

	rfkill_init_sw_state(*rfkill, !result);
	result = rfkill_register(*rfkill);
	if (result) {
		rfkill_destroy(*rfkill);
		*rfkill = NULL;
		return result;
	}
	return 0;
}

static void asus_wmi_rfkill_exit(struct asus_wmi *asus)
{
	if (asus->driver->wlan_ctrl_by_user && ashs_present())
		return;

	asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
	asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
	asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
	if (asus->wlan.rfkill) {
		rfkill_unregister(asus->wlan.rfkill);
		rfkill_destroy(asus->wlan.rfkill);
		asus->wlan.rfkill = NULL;
	}
	/*
	 * Refresh pci hotplug in case the rfkill state was changed after
	 * asus_unregister_rfkill_notifier()
	 */
	asus_rfkill_hotplug(asus);
	if (asus->hotplug_slot.ops)
		pci_hp_deregister(&asus->hotplug_slot);
	if (asus->hotplug_workqueue)
		destroy_workqueue(asus->hotplug_workqueue);

	if (asus->bluetooth.rfkill) {
		rfkill_unregister(asus->bluetooth.rfkill);
		rfkill_destroy(asus->bluetooth.rfkill);
		asus->bluetooth.rfkill = NULL;
	}
	if (asus->wimax.rfkill) {
		rfkill_unregister(asus->wimax.rfkill);
		rfkill_destroy(asus->wimax.rfkill);
		asus->wimax.rfkill = NULL;
	}
	if (asus->wwan3g.rfkill) {
		rfkill_unregister(asus->wwan3g.rfkill);
		rfkill_destroy(asus->wwan3g.rfkill);
		asus->wwan3g.rfkill = NULL;
	}
	if (asus->gps.rfkill) {
		rfkill_unregister(asus->gps.rfkill);
		rfkill_destroy(asus->gps.rfkill);
		asus->gps.rfkill = NULL;
	}
	if (asus->uwb.rfkill) {
		rfkill_unregister(asus->uwb.rfkill);
		rfkill_destroy(asus->uwb.rfkill);
		asus->uwb.rfkill = NULL;
	}
}

static int asus_wmi_rfkill_init(struct asus_wmi *asus)
{
	int result = 0;

	mutex_init(&asus->hotplug_lock);
	mutex_init(&asus->wmi_lock);

	result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan",
				 RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN);

	if (result && result != -ENODEV)
		goto exit;

	result = asus_new_rfkill(asus, &asus->bluetooth,
				 "asus-bluetooth", RFKILL_TYPE_BLUETOOTH,
				 ASUS_WMI_DEVID_BLUETOOTH);

	if (result && result != -ENODEV)
		goto exit;

	result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax",
				 RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX);

	if (result && result != -ENODEV)
		goto exit;

	result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g",
				 RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G);

	if (result && result != -ENODEV)
		goto exit;

	result = asus_new_rfkill(asus, &asus->gps, "asus-gps",
				 RFKILL_TYPE_GPS, ASUS_WMI_DEVID_GPS);

	if (result && result != -ENODEV)
		goto exit;

	result = asus_new_rfkill(asus, &asus->uwb, "asus-uwb",
				 RFKILL_TYPE_UWB, ASUS_WMI_DEVID_UWB);

	if (result && result != -ENODEV)
		goto exit;

	if (!asus->driver->quirks->hotplug_wireless)
		goto exit;

	result = asus_setup_pci_hotplug(asus);
	/*
	 * If we get -EBUSY then something else is handling the PCI hotplug -
	 * don't fail in this case
	 */
	if (result == -EBUSY)
		result = 0;

	asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
	asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
	asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
	/*
	 * Refresh pci hotplug in case the rfkill state was changed during
	 * setup.
	 */
	asus_rfkill_hotplug(asus);

exit:
	if (result && result != -ENODEV)
		asus_wmi_rfkill_exit(asus);

	if (result == -ENODEV)
		result = 0;

	return result;
}

static void asus_wmi_set_xusb2pr(struct asus_wmi *asus)
{
	struct pci_dev *xhci_pdev;
	u32 orig_ports_available;
	u32 ports_available = asus->driver->quirks->xusb2pr;

	xhci_pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
			PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI,
			NULL);

	if (!xhci_pdev)
		return;

	pci_read_config_dword(xhci_pdev, USB_INTEL_XUSB2PR,
				&orig_ports_available);

	pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR,
				cpu_to_le32(ports_available));

	pr_info("set USB_INTEL_XUSB2PR old: 0x%04x, new: 0x%04x\n",
			orig_ports_available, ports_available);
}

/*
 * Some devices dont support or have borcken get_als method
 * but still support set method.
 */
static void asus_wmi_set_als(void)
{
	asus_wmi_set_devstate(ASUS_WMI_DEVID_ALS_ENABLE, 1, NULL);
}

/*
 * Hwmon device
 */
static int asus_hwmon_agfn_fan_speed_read(struct asus_wmi *asus, int fan,
					  int *speed)
{
	struct fan_args args = {
		.agfn.len = sizeof(args),
		.agfn.mfun = ASUS_FAN_MFUN,
		.agfn.sfun = ASUS_FAN_SFUN_READ,
		.fan = fan,
		.speed = 0,
	};
	struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
	int status;

	if (fan != 1)
		return -EINVAL;

	status = asus_wmi_evaluate_method_agfn(input);

	if (status || args.agfn.err)
		return -ENXIO;

	if (speed)
		*speed = args.speed;

	return 0;
}

static int asus_hwmon_agfn_fan_speed_write(struct asus_wmi *asus, int fan,
				     int *speed)
{
	struct fan_args args = {
		.agfn.len = sizeof(args),
		.agfn.mfun = ASUS_FAN_MFUN,
		.agfn.sfun = ASUS_FAN_SFUN_WRITE,
		.fan = fan,
		.speed = speed ?  *speed : 0,
	};
	struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
	int status;

	/* 1: for setting 1st fan's speed 0: setting auto mode */
	if (fan != 1 && fan != 0)
		return -EINVAL;

	status = asus_wmi_evaluate_method_agfn(input);

	if (status || args.agfn.err)
		return -ENXIO;

	if (speed && fan == 1)
		asus->asus_hwmon_pwm = *speed;

	return 0;
}

/*
 * Check if we can read the speed of one fan. If true we assume we can also
 * control it.
 */
static int asus_hwmon_get_fan_number(struct asus_wmi *asus, int *num_fans)
{
	int status;
	int speed = 0;

	*num_fans = 0;

	status = asus_hwmon_agfn_fan_speed_read(asus, 1, &speed);
	if (!status)
		*num_fans = 1;

	return 0;
}

static int asus_hwmon_fan_set_auto(struct asus_wmi *asus)
{
	int status;

	status = asus_hwmon_agfn_fan_speed_write(asus, 0, NULL);
	if (status)
		return -ENXIO;

	asus->asus_hwmon_fan_manual_mode = false;

	return 0;
}

static int asus_hwmon_fan_rpm_show(struct device *dev, int fan)
{
	struct asus_wmi *asus = dev_get_drvdata(dev);
	int value;
	int ret;

	/* no speed readable on manual mode */
	if (asus->asus_hwmon_fan_manual_mode)
		return -ENXIO;

	ret = asus_hwmon_agfn_fan_speed_read(asus, fan+1, &value);
	if (ret) {
		pr_warn("reading fan speed failed: %d\n", ret);
		return -ENXIO;
	}

	return value;
}

static void asus_hwmon_pwm_show(struct asus_wmi *asus, int fan, int *value)
{
	int err;

	if (asus->asus_hwmon_pwm >= 0) {
		*value = asus->asus_hwmon_pwm;
		return;
	}

	err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, value);
	if (err < 0)
		return;

	*value &= 0xFF;

	if (*value == 1) /* Low Speed */
		*value = 85;
	else if (*value == 2)
		*value = 170;
	else if (*value == 3)
		*value = 255;
	else if (*value) {
		pr_err("Unknown fan speed %#x\n", *value);
		*value = -1;
	}
}

static ssize_t pwm1_show(struct device *dev,
			       struct device_attribute *attr,
			       char *buf)
{
	struct asus_wmi *asus = dev_get_drvdata(dev);
	int value;

	asus_hwmon_pwm_show(asus, 0, &value);

	return sprintf(buf, "%d\n", value);
}

static ssize_t pwm1_store(struct device *dev,
				     struct device_attribute *attr,
				     const char *buf, size_t count) {
	struct asus_wmi *asus = dev_get_drvdata(dev);
	int value;
	int state;
	int ret;

	ret = kstrtouint(buf, 10, &value);

	if (ret)
		return ret;

	value = clamp(value, 0, 255);

	state = asus_hwmon_agfn_fan_speed_write(asus, 1, &value);
	if (state)
		pr_warn("Setting fan speed failed: %d\n", state);
	else
		asus->asus_hwmon_fan_manual_mode = true;

	return count;
}

static ssize_t fan1_input_show(struct device *dev,
					struct device_attribute *attr,
					char *buf)
{
	int value = asus_hwmon_fan_rpm_show(dev, 0);

	return sprintf(buf, "%d\n", value < 0 ? -1 : value*100);

}

static ssize_t pwm1_enable_show(struct device *dev,
						 struct device_attribute *attr,
						 char *buf)
{
	struct asus_wmi *asus = dev_get_drvdata(dev);

	if (asus->asus_hwmon_fan_manual_mode)
		return sprintf(buf, "%d\n", ASUS_FAN_CTRL_MANUAL);

	return sprintf(buf, "%d\n", ASUS_FAN_CTRL_AUTO);
}

static ssize_t pwm1_enable_store(struct device *dev,
						  struct device_attribute *attr,
						  const char *buf, size_t count)
{
	struct asus_wmi *asus = dev_get_drvdata(dev);
	int status = 0;
	int state;
	int ret;

	ret = kstrtouint(buf, 10, &state);

	if (ret)
		return ret;

	if (state == ASUS_FAN_CTRL_MANUAL)
		asus->asus_hwmon_fan_manual_mode = true;
	else
		status = asus_hwmon_fan_set_auto(asus);

	if (status)
		return status;

	return count;
}

static ssize_t fan1_label_show(struct device *dev,
					  struct device_attribute *attr,
					  char *buf)
{
	return sprintf(buf, "%s\n", ASUS_FAN_DESC);
}

static ssize_t asus_hwmon_temp1(struct device *dev,
				struct device_attribute *attr,
				char *buf)
{
	struct asus_wmi *asus = dev_get_drvdata(dev);
	u32 value;
	int err;

	err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_THERMAL_CTRL, &value);

	if (err < 0)
		return err;

	value = DECI_KELVIN_TO_CELSIUS((value & 0xFFFF)) * 1000;

	return sprintf(buf, "%d\n", value);
}

/* Fan1 */
static DEVICE_ATTR_RW(pwm1);
static DEVICE_ATTR_RW(pwm1_enable);
static DEVICE_ATTR_RO(fan1_input);
static DEVICE_ATTR_RO(fan1_label);

/* Temperature */
static DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL);

static struct attribute *hwmon_attributes[] = {
	&dev_attr_pwm1.attr,
	&dev_attr_pwm1_enable.attr,
	&dev_attr_fan1_input.attr,
	&dev_attr_fan1_label.attr,

	&dev_attr_temp1_input.attr,
	NULL
};

static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
					  struct attribute *attr, int idx)
{
	struct device *dev = container_of(kobj, struct device, kobj);
	struct platform_device *pdev = to_platform_device(dev->parent);
	struct asus_wmi *asus = platform_get_drvdata(pdev);
	int dev_id = -1;
	int fan_attr = -1;
	u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
	bool ok = true;

	if (attr == &dev_attr_pwm1.attr)
		dev_id = ASUS_WMI_DEVID_FAN_CTRL;
	else if (attr == &dev_attr_temp1_input.attr)
		dev_id = ASUS_WMI_DEVID_THERMAL_CTRL;


	if (attr == &dev_attr_fan1_input.attr
	    || attr == &dev_attr_fan1_label.attr
	    || attr == &dev_attr_pwm1.attr
	    || attr == &dev_attr_pwm1_enable.attr) {
		fan_attr = 1;
	}

	if (dev_id != -1) {
		int err = asus_wmi_get_devstate(asus, dev_id, &value);

		if (err < 0 && fan_attr == -1)
			return 0; /* can't return negative here */
	}

	if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) {
		/*
		 * We need to find a better way, probably using sfun,
		 * bits or spec ...
		 * Currently we disable it if:
		 * - ASUS_WMI_UNSUPPORTED_METHOD is returned
		 * - reverved bits are non-zero
		 * - sfun and presence bit are not set
		 */
		if (value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000
		    || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT)))
			ok = false;
		else
			ok = fan_attr <= asus->asus_hwmon_num_fans;
	} else if (dev_id == ASUS_WMI_DEVID_THERMAL_CTRL) {
		/* If value is zero, something is clearly wrong */
		if (!value)
			ok = false;
	} else if (fan_attr <= asus->asus_hwmon_num_fans && fan_attr != -1) {
		ok = true;
	} else {
		ok = false;
	}

	return ok ? attr->mode : 0;
}

static const struct attribute_group hwmon_attribute_group = {
	.is_visible = asus_hwmon_sysfs_is_visible,
	.attrs = hwmon_attributes
};
__ATTRIBUTE_GROUPS(hwmon_attribute);

static int asus_wmi_hwmon_init(struct asus_wmi *asus)
{
	struct device *hwmon;

	hwmon = hwmon_device_register_with_groups(&asus->platform_device->dev,
						  "asus", asus,
						  hwmon_attribute_groups);
	if (IS_ERR(hwmon)) {
		pr_err("Could not register asus hwmon device\n");
		return PTR_ERR(hwmon);
	}
	return 0;
}

/*
 * Backlight
 */
static int read_backlight_power(struct asus_wmi *asus)
{
	int ret;
	if (asus->driver->quirks->store_backlight_power)
		ret = !asus->driver->panel_power;
	else
		ret = asus_wmi_get_devstate_simple(asus,
						   ASUS_WMI_DEVID_BACKLIGHT);

	if (ret < 0)
		return ret;

	return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
}

static int read_brightness_max(struct asus_wmi *asus)
{
	u32 retval;
	int err;

	err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);

	if (err < 0)
		return err;

	retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK;
	retval >>= 8;

	if (!retval)
		return -ENODEV;

	return retval;
}

static int read_brightness(struct backlight_device *bd)
{
	struct asus_wmi *asus = bl_get_data(bd);
	u32 retval;
	int err;

	err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);

	if (err < 0)
		return err;

	return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
}

static u32 get_scalar_command(struct backlight_device *bd)
{
	struct asus_wmi *asus = bl_get_data(bd);
	u32 ctrl_param = 0;

	if ((asus->driver->brightness < bd->props.brightness) ||
	    bd->props.brightness == bd->props.max_brightness)
		ctrl_param = 0x00008001;
	else if ((asus->driver->brightness > bd->props.brightness) ||
		 bd->props.brightness == 0)
		ctrl_param = 0x00008000;

	asus->driver->brightness = bd->props.brightness;

	return ctrl_param;
}

static int update_bl_status(struct backlight_device *bd)
{
	struct asus_wmi *asus = bl_get_data(bd);
	u32 ctrl_param;
	int power, err = 0;

	power = read_backlight_power(asus);
	if (power != -ENODEV && bd->props.power != power) {
		ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
		err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
					    ctrl_param, NULL);
		if (asus->driver->quirks->store_backlight_power)
			asus->driver->panel_power = bd->props.power;

		/* When using scalar brightness, updating the brightness
		 * will mess with the backlight power */
		if (asus->driver->quirks->scalar_panel_brightness)
			return err;
	}

	if (asus->driver->quirks->scalar_panel_brightness)
		ctrl_param = get_scalar_command(bd);
	else
		ctrl_param = bd->props.brightness;

	err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
				    ctrl_param, NULL);

	return err;
}

static const struct backlight_ops asus_wmi_bl_ops = {
	.get_brightness = read_brightness,
	.update_status = update_bl_status,
};

static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code)
{
	struct backlight_device *bd = asus->backlight_device;
	int old = bd->props.brightness;
	int new = old;

	if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
		new = code - NOTIFY_BRNUP_MIN + 1;
	else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
		new = code - NOTIFY_BRNDOWN_MIN;

	bd->props.brightness = new;
	backlight_update_status(bd);
	backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);

	return old;
}

static int asus_wmi_backlight_init(struct asus_wmi *asus)
{
	struct backlight_device *bd;
	struct backlight_properties props;
	int max;
	int power;

	max = read_brightness_max(asus);
	if (max < 0)
		return max;

	power = read_backlight_power(asus);

	if (power == -ENODEV)
		power = FB_BLANK_UNBLANK;
	else if (power < 0)
		return power;

	memset(&props, 0, sizeof(struct backlight_properties));
	props.type = BACKLIGHT_PLATFORM;
	props.max_brightness = max;
	bd = backlight_device_register(asus->driver->name,
				       &asus->platform_device->dev, asus,
				       &asus_wmi_bl_ops, &props);
	if (IS_ERR(bd)) {
		pr_err("Could not register backlight device\n");
		return PTR_ERR(bd);
	}

	asus->backlight_device = bd;

	if (asus->driver->quirks->store_backlight_power)
		asus->driver->panel_power = power;

	bd->props.brightness = read_brightness(bd);
	bd->props.power = power;
	backlight_update_status(bd);

	asus->driver->brightness = bd->props.brightness;

	return 0;
}

static void asus_wmi_backlight_exit(struct asus_wmi *asus)
{
	backlight_device_unregister(asus->backlight_device);

	asus->backlight_device = NULL;
}

static int is_display_toggle(int code)
{
	/* display toggle keys */
	if ((code >= 0x61 && code <= 0x67) ||
	    (code >= 0x8c && code <= 0x93) ||
	    (code >= 0xa0 && code <= 0xa7) ||
	    (code >= 0xd0 && code <= 0xd5))
		return 1;

	return 0;
}

static bool asus_wmi_has_fnlock_key(struct asus_wmi *asus)
{
	u32 result;

	asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FNLOCK, &result);

	return (result & ASUS_WMI_DSTS_PRESENCE_BIT) &&
		!(result & ASUS_WMI_FNLOCK_BIOS_DISABLED);
}

static void asus_wmi_fnlock_update(struct asus_wmi *asus)
{
	int mode = asus->fnlock_locked;

	asus_wmi_set_devstate(ASUS_WMI_DEVID_FNLOCK, mode, NULL);
}

static void asus_wmi_notify(u32 value, void *context)
{
	struct asus_wmi *asus = context;
	struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
	union acpi_object *obj;
	acpi_status status;
	int code;
	int orig_code;
	unsigned int key_value = 1;
	bool autorelease = 1;

	status = wmi_get_event_data(value, &response);
	if (status != AE_OK) {
		pr_err("bad event status 0x%x\n", status);
		return;
	}

	obj = (union acpi_object *)response.pointer;

	if (!obj || obj->type != ACPI_TYPE_INTEGER)
		goto exit;

	code = obj->integer.value;
	orig_code = code;

	if (asus->driver->key_filter) {
		asus->driver->key_filter(asus->driver, &code, &key_value,
					 &autorelease);
		if (code == ASUS_WMI_KEY_IGNORE)
			goto exit;
	}

	if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
		code = ASUS_WMI_BRN_UP;
	else if (code >= NOTIFY_BRNDOWN_MIN &&
		 code <= NOTIFY_BRNDOWN_MAX)
		code = ASUS_WMI_BRN_DOWN;

	if (code == ASUS_WMI_BRN_DOWN || code == ASUS_WMI_BRN_UP) {
		if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
			asus_wmi_backlight_notify(asus, orig_code);
			goto exit;
		}
	}

	if (code == NOTIFY_KBD_BRTUP) {
		kbd_led_set_by_kbd(asus, asus->kbd_led_wk + 1);
		goto exit;
	}
	if (code == NOTIFY_KBD_BRTDWN) {
		kbd_led_set_by_kbd(asus, asus->kbd_led_wk - 1);
		goto exit;
	}
	if (code == NOTIFY_KBD_BRTTOGGLE) {
		if (asus->kbd_led_wk == asus->kbd_led.max_brightness)
			kbd_led_set_by_kbd(asus, 0);
		else
			kbd_led_set_by_kbd(asus, asus->kbd_led_wk + 1);
		goto exit;
	}

	if (code == NOTIFY_FNLOCK_TOGGLE) {
		asus->fnlock_locked = !asus->fnlock_locked;
		asus_wmi_fnlock_update(asus);
		goto exit;
	}

	if (is_display_toggle(code) &&
	    asus->driver->quirks->no_display_toggle)
		goto exit;

	if (!sparse_keymap_report_event(asus->inputdev, code,
					key_value, autorelease))
		pr_info("Unknown key %x pressed\n", code);

exit:
	kfree(obj);
}

/*
 * Sys helpers
 */
static int parse_arg(const char *buf, unsigned long count, int *val)
{
	if (!count)
		return 0;
	if (sscanf(buf, "%i", val) != 1)
		return -EINVAL;
	return count;
}

static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid,
			     const char *buf, size_t count)
{
	u32 retval;
	int rv, err, value;

	value = asus_wmi_get_devstate_simple(asus, devid);
	if (value < 0)
		return value;

	rv = parse_arg(buf, count, &value);
	err = asus_wmi_set_devstate(devid, value, &retval);

	if (err < 0)
		return err;

	return rv;
}

static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf)
{
	int value = asus_wmi_get_devstate_simple(asus, devid);

	if (value < 0)
		return value;

	return sprintf(buf, "%d\n", value);
}

#define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm)			\
	static ssize_t show_##_name(struct device *dev,			\
				    struct device_attribute *attr,	\
				    char *buf)				\
	{								\
		struct asus_wmi *asus = dev_get_drvdata(dev);		\
									\
		return show_sys_wmi(asus, _cm, buf);			\
	}								\
	static ssize_t store_##_name(struct device *dev,		\
				     struct device_attribute *attr,	\
				     const char *buf, size_t count)	\
	{								\
		struct asus_wmi *asus = dev_get_drvdata(dev);		\
									\
		return store_sys_wmi(asus, _cm, buf, count);		\
	}								\
	static struct device_attribute dev_attr_##_name = {		\
		.attr = {						\
			.name = __stringify(_name),			\
			.mode = _mode },				\
		.show   = show_##_name,					\
		.store  = store_##_name,				\
	}

ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
ASUS_WMI_CREATE_DEVICE_ATTR(lid_resume, 0644, ASUS_WMI_DEVID_LID_RESUME);
ASUS_WMI_CREATE_DEVICE_ATTR(als_enable, 0644, ASUS_WMI_DEVID_ALS_ENABLE);

static ssize_t cpufv_store(struct device *dev, struct device_attribute *attr,
			   const char *buf, size_t count)
{
	int value, rv;

	if (!count || sscanf(buf, "%i", &value) != 1)
		return -EINVAL;
	if (value < 0 || value > 2)
		return -EINVAL;

	rv = asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
	if (rv < 0)
		return rv;

	return count;
}

static DEVICE_ATTR_WO(cpufv);

static struct attribute *platform_attributes[] = {
	&dev_attr_cpufv.attr,
	&dev_attr_camera.attr,
	&dev_attr_cardr.attr,
	&dev_attr_touchpad.attr,
	&dev_attr_lid_resume.attr,
	&dev_attr_als_enable.attr,
	NULL
};

static umode_t asus_sysfs_is_visible(struct kobject *kobj,
				    struct attribute *attr, int idx)
{
	struct device *dev = container_of(kobj, struct device, kobj);
	struct asus_wmi *asus = dev_get_drvdata(dev);
	bool ok = true;
	int devid = -1;

	if (attr == &dev_attr_camera.attr)
		devid = ASUS_WMI_DEVID_CAMERA;
	else if (attr == &dev_attr_cardr.attr)
		devid = ASUS_WMI_DEVID_CARDREADER;
	else if (attr == &dev_attr_touchpad.attr)
		devid = ASUS_WMI_DEVID_TOUCHPAD;
	else if (attr == &dev_attr_lid_resume.attr)
		devid = ASUS_WMI_DEVID_LID_RESUME;
	else if (attr == &dev_attr_als_enable.attr)
		devid = ASUS_WMI_DEVID_ALS_ENABLE;

	if (devid != -1)
		ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);

	return ok ? attr->mode : 0;
}

static const struct attribute_group platform_attribute_group = {
	.is_visible = asus_sysfs_is_visible,
	.attrs = platform_attributes
};

static void asus_wmi_sysfs_exit(struct platform_device *device)
{
	sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
}

static int asus_wmi_sysfs_init(struct platform_device *device)
{
	return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
}

/*
 * Platform device
 */
static int asus_wmi_platform_init(struct asus_wmi *asus)
{
	int rv;

	/* INIT enable hotkeys on some models */
	if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv))
		pr_info("Initialization: %#x\n", rv);

	/* We don't know yet what to do with this version... */
	if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) {
		pr_info("BIOS WMI version: %d.%d\n", rv >> 16, rv & 0xFF);
		asus->spec = rv;
	}

	/*
	 * The SFUN method probably allows the original driver to get the list
	 * of features supported by a given model. For now, 0x0100 or 0x0800
	 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
	 * The significance of others is yet to be found.
	 */
	if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) {
		pr_info("SFUN value: %#x\n", rv);
		asus->sfun = rv;
	}

	/*
	 * Eee PC and Notebooks seems to have different method_id for DSTS,
	 * but it may also be related to the BIOS's SPEC.
	 * Note, on most Eeepc, there is no way to check if a method exist
	 * or note, while on notebooks, they returns 0xFFFFFFFE on failure,
	 * but once again, SPEC may probably be used for that kind of things.
	 */
	if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL))
		asus->dsts_id = ASUS_WMI_METHODID_DSTS;
	else
		asus->dsts_id = ASUS_WMI_METHODID_DSTS2;

	/* CWAP allow to define the behavior of the Fn+F2 key,
	 * this method doesn't seems to be present on Eee PCs */
	if (asus->driver->quirks->wapf >= 0)
		asus_wmi_set_devstate(ASUS_WMI_DEVID_CWAP,
				      asus->driver->quirks->wapf, NULL);

	return asus_wmi_sysfs_init(asus->platform_device);
}

static void asus_wmi_platform_exit(struct asus_wmi *asus)
{
	asus_wmi_sysfs_exit(asus->platform_device);
}

/*
 * debugfs
 */
struct asus_wmi_debugfs_node {
	struct asus_wmi *asus;
	char *name;
	int (*show) (struct seq_file *m, void *data);
};

static int show_dsts(struct seq_file *m, void *data)
{
	struct asus_wmi *asus = m->private;
	int err;
	u32 retval = -1;

	err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval);

	if (err < 0)
		return err;

	seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval);

	return 0;
}

static int show_devs(struct seq_file *m, void *data)
{
	struct asus_wmi *asus = m->private;
	int err;
	u32 retval = -1;

	err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
				    &retval);

	if (err < 0)
		return err;

	seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id,
		   asus->debug.ctrl_param, retval);

	return 0;
}

static int show_call(struct seq_file *m, void *data)
{
	struct asus_wmi *asus = m->private;
	struct bios_args args = {
		.arg0 = asus->debug.dev_id,
		.arg1 = asus->debug.ctrl_param,
	};
	struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
	union acpi_object *obj;
	acpi_status status;

	status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID,
				     0, asus->debug.method_id,
				     &input, &output);

	if (ACPI_FAILURE(status))
		return -EIO;

	obj = (union acpi_object *)output.pointer;
	if (obj && obj->type == ACPI_TYPE_INTEGER)
		seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id,
			   asus->debug.dev_id, asus->debug.ctrl_param,
			   (u32) obj->integer.value);
	else
		seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id,
			   asus->debug.dev_id, asus->debug.ctrl_param,
			   obj ? obj->type : -1);

	kfree(obj);

	return 0;
}

static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
	{NULL, "devs", show_devs},
	{NULL, "dsts", show_dsts},
	{NULL, "call", show_call},
};

static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
{
	struct asus_wmi_debugfs_node *node = inode->i_private;

	return single_open(file, node->show, node->asus);
}

static const struct file_operations asus_wmi_debugfs_io_ops = {
	.owner = THIS_MODULE,
	.open = asus_wmi_debugfs_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

static void asus_wmi_debugfs_exit(struct asus_wmi *asus)
{
	debugfs_remove_recursive(asus->debug.root);
}

static int asus_wmi_debugfs_init(struct asus_wmi *asus)
{
	struct dentry *dent;
	int i;

	asus->debug.root = debugfs_create_dir(asus->driver->name, NULL);
	if (!asus->debug.root) {
		pr_err("failed to create debugfs directory\n");
		goto error_debugfs;
	}

	dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR,
				  asus->debug.root, &asus->debug.method_id);
	if (!dent)
		goto error_debugfs;

	dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR,
				  asus->debug.root, &asus->debug.dev_id);
	if (!dent)
		goto error_debugfs;

	dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR,
				  asus->debug.root, &asus->debug.ctrl_param);
	if (!dent)
		goto error_debugfs;

	for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) {
		struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i];

		node->asus = asus;
		dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
					   asus->debug.root, node,
					   &asus_wmi_debugfs_io_ops);
		if (!dent) {
			pr_err("failed to create debug file: %s\n", node->name);
			goto error_debugfs;
		}
	}

	return 0;

error_debugfs:
	asus_wmi_debugfs_exit(asus);
	return -ENOMEM;
}

static int asus_wmi_fan_init(struct asus_wmi *asus)
{
	int status;

	asus->asus_hwmon_pwm = -1;
	asus->asus_hwmon_num_fans = -1;
	asus->asus_hwmon_fan_manual_mode = false;

	status = asus_hwmon_get_fan_number(asus, &asus->asus_hwmon_num_fans);
	if (status) {
		asus->asus_hwmon_num_fans = 0;
		pr_warn("Could not determine number of fans: %d\n", status);
		return -ENXIO;
	}

	pr_info("Number of fans: %d\n", asus->asus_hwmon_num_fans);
	return 0;
}

/*
 * WMI Driver
 */
static int asus_wmi_add(struct platform_device *pdev)
{
	struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
	struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
	struct asus_wmi *asus;
	const char *chassis_type;
	acpi_status status;
	int err;
	u32 result;

	asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL);
	if (!asus)
		return -ENOMEM;

	asus->driver = wdrv;
	asus->platform_device = pdev;
	wdrv->platform_device = pdev;
	platform_set_drvdata(asus->platform_device, asus);

	if (wdrv->detect_quirks)
		wdrv->detect_quirks(asus->driver);

	err = asus_wmi_platform_init(asus);
	if (err)
		goto fail_platform;

	err = asus_wmi_input_init(asus);
	if (err)
		goto fail_input;

	err = asus_wmi_fan_init(asus); /* probably no problems on error */
	asus_hwmon_fan_set_auto(asus);

	err = asus_wmi_hwmon_init(asus);
	if (err)
		goto fail_hwmon;

	err = asus_wmi_led_init(asus);
	if (err)
		goto fail_leds;

	asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WLAN, &result);
	if (result & (ASUS_WMI_DSTS_PRESENCE_BIT | ASUS_WMI_DSTS_USER_BIT))
		asus->driver->wlan_ctrl_by_user = 1;

	if (!(asus->driver->wlan_ctrl_by_user && ashs_present())) {
		err = asus_wmi_rfkill_init(asus);
		if (err)
			goto fail_rfkill;
	}

	if (asus->driver->quirks->wmi_force_als_set)
		asus_wmi_set_als();

	/* Some Asus desktop boards export an acpi-video backlight interface,
	   stop this from showing up */
	chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE);
	if (chassis_type && !strcmp(chassis_type, "3"))
		acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);

	if (asus->driver->quirks->wmi_backlight_power)
		acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);

	if (asus->driver->quirks->wmi_backlight_native)
		acpi_video_set_dmi_backlight_type(acpi_backlight_native);

	if (asus->driver->quirks->xusb2pr)
		asus_wmi_set_xusb2pr(asus);

	if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
		err = asus_wmi_backlight_init(asus);
		if (err && err != -ENODEV)
			goto fail_backlight;
	} else if (asus->driver->quirks->wmi_backlight_set_devstate)
		err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT, 2, NULL);

	if (asus_wmi_has_fnlock_key(asus)) {
		asus->fnlock_locked = true;
		asus_wmi_fnlock_update(asus);
	}

	status = wmi_install_notify_handler(asus->driver->event_guid,
					    asus_wmi_notify, asus);
	if (ACPI_FAILURE(status)) {
		pr_err("Unable to register notify handler - %d\n", status);
		err = -ENODEV;
		goto fail_wmi_handler;
	}

	err = asus_wmi_debugfs_init(asus);
	if (err)
		goto fail_debugfs;

	return 0;

fail_debugfs:
	wmi_remove_notify_handler(asus->driver->event_guid);
fail_wmi_handler:
	asus_wmi_backlight_exit(asus);
fail_backlight:
	asus_wmi_rfkill_exit(asus);
fail_rfkill:
	asus_wmi_led_exit(asus);
fail_leds:
fail_hwmon:
	asus_wmi_input_exit(asus);
fail_input:
	asus_wmi_platform_exit(asus);
fail_platform:
	kfree(asus);
	return err;
}

static int asus_wmi_remove(struct platform_device *device)
{
	struct asus_wmi *asus;

	asus = platform_get_drvdata(device);
	wmi_remove_notify_handler(asus->driver->event_guid);
	asus_wmi_backlight_exit(asus);
	asus_wmi_input_exit(asus);
	asus_wmi_led_exit(asus);
	asus_wmi_rfkill_exit(asus);
	asus_wmi_debugfs_exit(asus);
	asus_wmi_platform_exit(asus);
	asus_hwmon_fan_set_auto(asus);

	kfree(asus);
	return 0;
}

/*
 * Platform driver - hibernate/resume callbacks
 */
static int asus_hotk_thaw(struct device *device)
{
	struct asus_wmi *asus = dev_get_drvdata(device);

	if (asus->wlan.rfkill) {
		bool wlan;

		/*
		 * Work around bios bug - acpi _PTS turns off the wireless led
		 * during suspend.  Normally it restores it on resume, but
		 * we should kick it ourselves in case hibernation is aborted.
		 */
		wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
		asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL);
	}

	return 0;
}

static int asus_hotk_resume(struct device *device)
{
	struct asus_wmi *asus = dev_get_drvdata(device);

	if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
		kbd_led_update(asus);

	if (asus_wmi_has_fnlock_key(asus))
		asus_wmi_fnlock_update(asus);
	return 0;
}

static int asus_hotk_restore(struct device *device)
{
	struct asus_wmi *asus = dev_get_drvdata(device);
	int bl;

	/* Refresh both wlan rfkill state and pci hotplug */
	if (asus->wlan.rfkill)
		asus_rfkill_hotplug(asus);

	if (asus->bluetooth.rfkill) {
		bl = !asus_wmi_get_devstate_simple(asus,
						   ASUS_WMI_DEVID_BLUETOOTH);
		rfkill_set_sw_state(asus->bluetooth.rfkill, bl);
	}
	if (asus->wimax.rfkill) {
		bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX);
		rfkill_set_sw_state(asus->wimax.rfkill, bl);
	}
	if (asus->wwan3g.rfkill) {
		bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G);
		rfkill_set_sw_state(asus->wwan3g.rfkill, bl);
	}
	if (asus->gps.rfkill) {
		bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_GPS);
		rfkill_set_sw_state(asus->gps.rfkill, bl);
	}
	if (asus->uwb.rfkill) {
		bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_UWB);
		rfkill_set_sw_state(asus->uwb.rfkill, bl);
	}
	if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
		kbd_led_update(asus);

	if (asus_wmi_has_fnlock_key(asus))
		asus_wmi_fnlock_update(asus);
	return 0;
}

static const struct dev_pm_ops asus_pm_ops = {
	.thaw = asus_hotk_thaw,
	.restore = asus_hotk_restore,
	.resume = asus_hotk_resume,
};

static int asus_wmi_probe(struct platform_device *pdev)
{
	struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
	struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
	int ret;

	if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
		pr_warn("ASUS Management GUID not found\n");
		return -ENODEV;
	}

	if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) {
		pr_warn("ASUS Event GUID not found\n");
		return -ENODEV;
	}

	if (wdrv->probe) {
		ret = wdrv->probe(pdev);
		if (ret)
			return ret;
	}

	return asus_wmi_add(pdev);
}

static bool used;

int __init_or_module asus_wmi_register_driver(struct asus_wmi_driver *driver)
{
	struct platform_driver *platform_driver;
	struct platform_device *platform_device;

	if (used)
		return -EBUSY;

	platform_driver = &driver->platform_driver;
	platform_driver->remove = asus_wmi_remove;
	platform_driver->driver.owner = driver->owner;
	platform_driver->driver.name = driver->name;
	platform_driver->driver.pm = &asus_pm_ops;

	platform_device = platform_create_bundle(platform_driver,
						 asus_wmi_probe,
						 NULL, 0, NULL, 0);
	if (IS_ERR(platform_device))
		return PTR_ERR(platform_device);

	used = true;
	return 0;
}
EXPORT_SYMBOL_GPL(asus_wmi_register_driver);

void asus_wmi_unregister_driver(struct asus_wmi_driver *driver)
{
	platform_device_unregister(driver->platform_device);
	platform_driver_unregister(&driver->platform_driver);
	used = false;
}
EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver);

static int __init asus_wmi_init(void)
{
	pr_info("ASUS WMI generic driver loaded\n");
	return 0;
}

static void __exit asus_wmi_exit(void)
{
	pr_info("ASUS WMI generic driver unloaded\n");
}

module_init(asus_wmi_init);
module_exit(asus_wmi_exit);