summaryrefslogtreecommitdiffstats
path: root/drivers/input/keyboard/atkbd.c
blob: d358ef8623f490709875b901d82580b1afc7a7fc (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
/*
 * AT and PS/2 keyboard driver
 *
 * Copyright (c) 1999-2002 Vojtech Pavlik
 */

/*
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 */

/*
 * This driver can handle standard AT keyboards and PS/2 keyboards in
 * Translated and Raw Set 2 and Set 3, as well as AT keyboards on dumb
 * input-only controllers and AT keyboards connected over a one way RS232
 * converter.
 */

#include <linux/delay.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/workqueue.h>
#include <linux/libps2.h>
#include <linux/mutex.h>
#include <linux/dmi.h>

#define DRIVER_DESC	"AT and PS/2 keyboard driver"

MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

static int atkbd_set = 2;
module_param_named(set, atkbd_set, int, 0);
MODULE_PARM_DESC(set, "Select keyboard code set (2 = default, 3 = PS/2 native)");

#if defined(__i386__) || defined(__x86_64__) || defined(__hppa__)
static bool atkbd_reset;
#else
static bool atkbd_reset = true;
#endif
module_param_named(reset, atkbd_reset, bool, 0);
MODULE_PARM_DESC(reset, "Reset keyboard during initialization");

static bool atkbd_softrepeat;
module_param_named(softrepeat, atkbd_softrepeat, bool, 0);
MODULE_PARM_DESC(softrepeat, "Use software keyboard repeat");

static bool atkbd_softraw = true;
module_param_named(softraw, atkbd_softraw, bool, 0);
MODULE_PARM_DESC(softraw, "Use software generated rawmode");

static bool atkbd_scroll;
module_param_named(scroll, atkbd_scroll, bool, 0);
MODULE_PARM_DESC(scroll, "Enable scroll-wheel on MS Office and similar keyboards");

static bool atkbd_extra;
module_param_named(extra, atkbd_extra, bool, 0);
MODULE_PARM_DESC(extra, "Enable extra LEDs and keys on IBM RapidAcces, EzKey and similar keyboards");

/*
 * Scancode to keycode tables. These are just the default setting, and
 * are loadable via a userland utility.
 */

#define ATKBD_KEYMAP_SIZE	512

static const unsigned short atkbd_set2_keycode[ATKBD_KEYMAP_SIZE] = {

#ifdef CONFIG_KEYBOARD_ATKBD_HP_KEYCODES

/* XXX: need a more general approach */

#include "hpps2atkbd.h"	/* include the keyboard scancodes */

#else
	  0, 67, 65, 63, 61, 59, 60, 88,  0, 68, 66, 64, 62, 15, 41,117,
	  0, 56, 42, 93, 29, 16,  2,  0,  0,  0, 44, 31, 30, 17,  3,  0,
	  0, 46, 45, 32, 18,  5,  4, 95,  0, 57, 47, 33, 20, 19,  6,183,
	  0, 49, 48, 35, 34, 21,  7,184,  0,  0, 50, 36, 22,  8,  9,185,
	  0, 51, 37, 23, 24, 11, 10,  0,  0, 52, 53, 38, 39, 25, 12,  0,
	  0, 89, 40,  0, 26, 13,  0,  0, 58, 54, 28, 27,  0, 43,  0, 85,
	  0, 86, 91, 90, 92,  0, 14, 94,  0, 79,124, 75, 71,121,  0,  0,
	 82, 83, 80, 76, 77, 72,  1, 69, 87, 78, 81, 74, 55, 73, 70, 99,

	  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	217,100,255,  0, 97,165,  0,  0,156,  0,  0,  0,  0,  0,  0,125,
	173,114,  0,113,  0,  0,  0,126,128,  0,  0,140,  0,  0,  0,127,
	159,  0,115,  0,164,  0,  0,116,158,  0,172,166,  0,  0,  0,142,
	157,  0,  0,  0,  0,  0,  0,  0,155,  0, 98,  0,  0,163,  0,  0,
	226,  0,  0,  0,  0,  0,  0,  0,  0,255, 96,  0,  0,  0,143,  0,
	  0,  0,  0,  0,  0,  0,  0,  0,  0,107,  0,105,102,  0,  0,112,
	110,111,108,112,106,103,  0,119,  0,118,109,  0, 99,104,119,  0,

	  0,  0,  0, 65, 99,
#endif
};

static const unsigned short atkbd_set3_keycode[ATKBD_KEYMAP_SIZE] = {

	  0,  0,  0,  0,  0,  0,  0, 59,  1,138,128,129,130, 15, 41, 60,
	131, 29, 42, 86, 58, 16,  2, 61,133, 56, 44, 31, 30, 17,  3, 62,
	134, 46, 45, 32, 18,  5,  4, 63,135, 57, 47, 33, 20, 19,  6, 64,
	136, 49, 48, 35, 34, 21,  7, 65,137,100, 50, 36, 22,  8,  9, 66,
	125, 51, 37, 23, 24, 11, 10, 67,126, 52, 53, 38, 39, 25, 12, 68,
	113,114, 40, 43, 26, 13, 87, 99, 97, 54, 28, 27, 43, 43, 88, 70,
	108,105,119,103,111,107, 14,110,  0, 79,106, 75, 71,109,102,104,
	 82, 83, 80, 76, 77, 72, 69, 98,  0, 96, 81,  0, 78, 73, 55,183,

	184,185,186,187, 74, 94, 92, 93,  0,  0,  0,125,126,127,112,  0,
	  0,139,172,163,165,115,152,172,166,140,160,154,113,114,167,168,
	148,149,147,140
};

static const unsigned short atkbd_unxlate_table[128] = {
          0,118, 22, 30, 38, 37, 46, 54, 61, 62, 70, 69, 78, 85,102, 13,
         21, 29, 36, 45, 44, 53, 60, 67, 68, 77, 84, 91, 90, 20, 28, 27,
         35, 43, 52, 51, 59, 66, 75, 76, 82, 14, 18, 93, 26, 34, 33, 42,
         50, 49, 58, 65, 73, 74, 89,124, 17, 41, 88,  5,  6,  4, 12,  3,
         11,  2, 10,  1,  9,119,126,108,117,125,123,107,115,116,121,105,
        114,122,112,113,127, 96, 97,120,  7, 15, 23, 31, 39, 47, 55, 63,
         71, 79, 86, 94,  8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 87,111,
         19, 25, 57, 81, 83, 92, 95, 98, 99,100,101,103,104,106,109,110
};

#define ATKBD_CMD_SETLEDS	0x10ed
#define ATKBD_CMD_GSCANSET	0x11f0
#define ATKBD_CMD_SSCANSET	0x10f0
#define ATKBD_CMD_GETID		0x02f2
#define ATKBD_CMD_SETREP	0x10f3
#define ATKBD_CMD_ENABLE	0x00f4
#define ATKBD_CMD_RESET_DIS	0x00f5	/* Reset to defaults and disable */
#define ATKBD_CMD_RESET_DEF	0x00f6	/* Reset to defaults */
#define ATKBD_CMD_SETALL_MBR	0x00fa
#define ATKBD_CMD_RESET_BAT	0x02ff
#define ATKBD_CMD_RESEND	0x00fe
#define ATKBD_CMD_EX_ENABLE	0x10ea
#define ATKBD_CMD_EX_SETLEDS	0x20eb
#define ATKBD_CMD_OK_GETID	0x02e8

#define ATKBD_RET_ACK		0xfa
#define ATKBD_RET_NAK		0xfe
#define ATKBD_RET_BAT		0xaa
#define ATKBD_RET_EMUL0		0xe0
#define ATKBD_RET_EMUL1		0xe1
#define ATKBD_RET_RELEASE	0xf0
#define ATKBD_RET_HANJA		0xf1
#define ATKBD_RET_HANGEUL	0xf2
#define ATKBD_RET_ERR		0xff

#define ATKBD_KEY_UNKNOWN	0
#define ATKBD_KEY_NULL		255

#define ATKBD_SCR_1		0xfffe
#define ATKBD_SCR_2		0xfffd
#define ATKBD_SCR_4		0xfffc
#define ATKBD_SCR_8		0xfffb
#define ATKBD_SCR_CLICK		0xfffa
#define ATKBD_SCR_LEFT		0xfff9
#define ATKBD_SCR_RIGHT		0xfff8

#define ATKBD_SPECIAL		ATKBD_SCR_RIGHT

#define ATKBD_LED_EVENT_BIT	0
#define ATKBD_REP_EVENT_BIT	1

#define ATKBD_XL_ERR		0x01
#define ATKBD_XL_BAT		0x02
#define ATKBD_XL_ACK		0x04
#define ATKBD_XL_NAK		0x08
#define ATKBD_XL_HANGEUL	0x10
#define ATKBD_XL_HANJA		0x20

static const struct {
	unsigned short keycode;
	unsigned char set2;
} atkbd_scroll_keys[] = {
	{ ATKBD_SCR_1,     0xc5 },
	{ ATKBD_SCR_2,     0x9d },
	{ ATKBD_SCR_4,     0xa4 },
	{ ATKBD_SCR_8,     0x9b },
	{ ATKBD_SCR_CLICK, 0xe0 },
	{ ATKBD_SCR_LEFT,  0xcb },
	{ ATKBD_SCR_RIGHT, 0xd2 },
};

/*
 * The atkbd control structure
 */

struct atkbd {

	struct ps2dev ps2dev;
	struct input_dev *dev;

	/* Written only during init */
	char name[64];
	char phys[32];

	unsigned short id;
	unsigned short keycode[ATKBD_KEYMAP_SIZE];
	DECLARE_BITMAP(force_release_mask, ATKBD_KEYMAP_SIZE);
	unsigned char set;
	bool translated;
	bool extra;
	bool write;
	bool softrepeat;
	bool softraw;
	bool scroll;
	bool enabled;

	/* Accessed only from interrupt */
	unsigned char emul;
	bool resend;
	bool release;
	unsigned long xl_bit;
	unsigned int last;
	unsigned long time;
	unsigned long err_count;

	struct delayed_work event_work;
	unsigned long event_jiffies;
	unsigned long event_mask;

	/* Serializes reconnect(), attr->set() and event work */
	struct mutex mutex;
};

/*
 * System-specific keymap fixup routine
 */
static void (*atkbd_platform_fixup)(struct atkbd *, const void *data);
static void *atkbd_platform_fixup_data;
static unsigned int (*atkbd_platform_scancode_fixup)(struct atkbd *, unsigned int);

static ssize_t atkbd_attr_show_helper(struct device *dev, char *buf,
				ssize_t (*handler)(struct atkbd *, char *));
static ssize_t atkbd_attr_set_helper(struct device *dev, const char *buf, size_t count,
				ssize_t (*handler)(struct atkbd *, const char *, size_t));
#define ATKBD_DEFINE_ATTR(_name)						\
static ssize_t atkbd_show_##_name(struct atkbd *, char *);			\
static ssize_t atkbd_set_##_name(struct atkbd *, const char *, size_t);		\
static ssize_t atkbd_do_show_##_name(struct device *d,				\
				struct device_attribute *attr, char *b)		\
{										\
	return atkbd_attr_show_helper(d, b, atkbd_show_##_name);		\
}										\
static ssize_t atkbd_do_set_##_name(struct device *d,				\
			struct device_attribute *attr, const char *b, size_t s)	\
{										\
	return atkbd_attr_set_helper(d, b, s, atkbd_set_##_name);		\
}										\
static struct device_attribute atkbd_attr_##_name =				\
	__ATTR(_name, S_IWUSR | S_IRUGO, atkbd_do_show_##_name, atkbd_do_set_##_name);

ATKBD_DEFINE_ATTR(extra);
ATKBD_DEFINE_ATTR(force_release);
ATKBD_DEFINE_ATTR(scroll);
ATKBD_DEFINE_ATTR(set);
ATKBD_DEFINE_ATTR(softrepeat);
ATKBD_DEFINE_ATTR(softraw);

#define ATKBD_DEFINE_RO_ATTR(_name)						\
static ssize_t atkbd_show_##_name(struct atkbd *, char *);			\
static ssize_t atkbd_do_show_##_name(struct device *d,				\
				struct device_attribute *attr, char *b)		\
{										\
	return atkbd_attr_show_helper(d, b, atkbd_show_##_name);		\
}										\
static struct device_attribute atkbd_attr_##_name =				\
	__ATTR(_name, S_IRUGO, atkbd_do_show_##_name, NULL);

ATKBD_DEFINE_RO_ATTR(err_count);

static struct attribute *atkbd_attributes[] = {
	&atkbd_attr_extra.attr,
	&atkbd_attr_force_release.attr,
	&atkbd_attr_scroll.attr,
	&atkbd_attr_set.attr,
	&atkbd_attr_softrepeat.attr,
	&atkbd_attr_softraw.attr,
	&atkbd_attr_err_count.attr,
	NULL
};

static struct attribute_group atkbd_attribute_group = {
	.attrs	= atkbd_attributes,
};

static const unsigned int xl_table[] = {
	ATKBD_RET_BAT, ATKBD_RET_ERR, ATKBD_RET_ACK,
	ATKBD_RET_NAK, ATKBD_RET_HANJA, ATKBD_RET_HANGEUL,
};

/*
 * Checks if we should mangle the scancode to extract 'release' bit
 * in translated mode.
 */
static bool atkbd_need_xlate(unsigned long xl_bit, unsigned char code)
{
	int i;

	if (code == ATKBD_RET_EMUL0 || code == ATKBD_RET_EMUL1)
		return false;

	for (i = 0; i < ARRAY_SIZE(xl_table); i++)
		if (code == xl_table[i])
			return test_bit(i, &xl_bit);

	return true;
}

/*
 * Calculates new value of xl_bit so the driver can distinguish
 * between make/break pair of scancodes for select keys and PS/2
 * protocol responses.
 */
static void atkbd_calculate_xl_bit(struct atkbd *atkbd, unsigned char code)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(xl_table); i++) {
		if (!((code ^ xl_table[i]) & 0x7f)) {
			if (code & 0x80)
				__clear_bit(i, &atkbd->xl_bit);
			else
				__set_bit(i, &atkbd->xl_bit);
			break;
		}
	}
}

/*
 * Encode the scancode, 0xe0 prefix, and high bit into a single integer,
 * keeping kernel 2.4 compatibility for set 2
 */
static unsigned int atkbd_compat_scancode(struct atkbd *atkbd, unsigned int code)
{
	if (atkbd->set == 3) {
		if (atkbd->emul == 1)
			code |= 0x100;
        } else {
		code = (code & 0x7f) | ((code & 0x80) << 1);
		if (atkbd->emul == 1)
			code |= 0x80;
	}

	return code;
}

/*
 * atkbd_interrupt(). Here takes place processing of data received from
 * the keyboard into events.
 */

static irqreturn_t atkbd_interrupt(struct serio *serio, unsigned char data,
				   unsigned int flags)
{
	struct atkbd *atkbd = serio_get_drvdata(serio);
	struct input_dev *dev = atkbd->dev;
	unsigned int code = data;
	int scroll = 0, hscroll = 0, click = -1;
	int value;
	unsigned short keycode;

	dev_dbg(&serio->dev, "Received %02x flags %02x\n", data, flags);

#if !defined(__i386__) && !defined (__x86_64__)
	if ((flags & (SERIO_FRAME | SERIO_PARITY)) && (~flags & SERIO_TIMEOUT) && !atkbd->resend && atkbd->write) {
		dev_warn(&serio->dev, "Frame/parity error: %02x\n", flags);
		serio_write(serio, ATKBD_CMD_RESEND);
		atkbd->resend = true;
		goto out;
	}

	if (!flags && data == ATKBD_RET_ACK)
		atkbd->resend = false;
#endif

	if (unlikely(atkbd->ps2dev.flags & PS2_FLAG_ACK))
		if  (ps2_handle_ack(&atkbd->ps2dev, data))
			goto out;

	if (unlikely(atkbd->ps2dev.flags & PS2_FLAG_CMD))
		if  (ps2_handle_response(&atkbd->ps2dev, data))
			goto out;

	if (!atkbd->enabled)
		goto out;

	input_event(dev, EV_MSC, MSC_RAW, code);

	if (atkbd_platform_scancode_fixup)
		code = atkbd_platform_scancode_fixup(atkbd, code);

	if (atkbd->translated) {

		if (atkbd->emul || atkbd_need_xlate(atkbd->xl_bit, code)) {
			atkbd->release = code >> 7;
			code &= 0x7f;
		}

		if (!atkbd->emul)
			atkbd_calculate_xl_bit(atkbd, data);
	}

	switch (code) {
	case ATKBD_RET_BAT:
		atkbd->enabled = false;
		serio_reconnect(atkbd->ps2dev.serio);
		goto out;
	case ATKBD_RET_EMUL0:
		atkbd->emul = 1;
		goto out;
	case ATKBD_RET_EMUL1:
		atkbd->emul = 2;
		goto out;
	case ATKBD_RET_RELEASE:
		atkbd->release = true;
		goto out;
	case ATKBD_RET_ACK:
	case ATKBD_RET_NAK:
		if (printk_ratelimit())
			dev_warn(&serio->dev,
				 "Spurious %s on %s. "
				 "Some program might be trying access hardware directly.\n",
				 data == ATKBD_RET_ACK ? "ACK" : "NAK", serio->phys);
		goto out;
	case ATKBD_RET_ERR:
		atkbd->err_count++;
		dev_dbg(&serio->dev, "Keyboard on %s reports too many keys pressed.\n",
			serio->phys);
		goto out;
	}

	code = atkbd_compat_scancode(atkbd, code);

	if (atkbd->emul && --atkbd->emul)
		goto out;

	keycode = atkbd->keycode[code];

	if (keycode != ATKBD_KEY_NULL)
		input_event(dev, EV_MSC, MSC_SCAN, code);

	switch (keycode) {
	case ATKBD_KEY_NULL:
		break;
	case ATKBD_KEY_UNKNOWN:
		dev_warn(&serio->dev,
			 "Unknown key %s (%s set %d, code %#x on %s).\n",
			 atkbd->release ? "released" : "pressed",
			 atkbd->translated ? "translated" : "raw",
			 atkbd->set, code, serio->phys);
		dev_warn(&serio->dev,
			 "Use 'setkeycodes %s%02x <keycode>' to make it known.\n",
			 code & 0x80 ? "e0" : "", code & 0x7f);
		input_sync(dev);
		break;
	case ATKBD_SCR_1:
		scroll = 1;
		break;
	case ATKBD_SCR_2:
		scroll = 2;
		break;
	case ATKBD_SCR_4:
		scroll = 4;
		break;
	case ATKBD_SCR_8:
		scroll = 8;
		break;
	case ATKBD_SCR_CLICK:
		click = !atkbd->release;
		break;
	case ATKBD_SCR_LEFT:
		hscroll = -1;
		break;
	case ATKBD_SCR_RIGHT:
		hscroll = 1;
		break;
	default:
		if (atkbd->release) {
			value = 0;
			atkbd->last = 0;
		} else if (!atkbd->softrepeat && test_bit(keycode, dev->key)) {
			/* Workaround Toshiba laptop multiple keypress */
			value = time_before(jiffies, atkbd->time) && atkbd->last == code ? 1 : 2;
		} else {
			value = 1;
			atkbd->last = code;
			atkbd->time = jiffies + msecs_to_jiffies(dev->rep[REP_DELAY]) / 2;
		}

		input_event(dev, EV_KEY, keycode, value);
		input_sync(dev);

		if (value && test_bit(code, atkbd->force_release_mask)) {
			input_report_key(dev, keycode, 0);
			input_sync(dev);
		}
	}

	if (atkbd->scroll) {
		if (click != -1)
			input_report_key(dev, BTN_MIDDLE, click);
		input_report_rel(dev, REL_WHEEL,
				 atkbd->release ? -scroll : scroll);
		input_report_rel(dev, REL_HWHEEL, hscroll);
		input_sync(dev);
	}

	atkbd->release = false;
out:
	return IRQ_HANDLED;
}

static int atkbd_set_repeat_rate(struct atkbd *atkbd)
{
	const short period[32] =
		{ 33,  37,  42,  46,  50,  54,  58,  63,  67,  75,  83,  92, 100, 109, 116, 125,
		 133, 149, 167, 182, 200, 217, 232, 250, 270, 303, 333, 370, 400, 435, 470, 500 };
	const short delay[4] =
		{ 250, 500, 750, 1000 };

	struct input_dev *dev = atkbd->dev;
	unsigned char param;
	int i = 0, j = 0;

	while (i < ARRAY_SIZE(period) - 1 && period[i] < dev->rep[REP_PERIOD])
		i++;
	dev->rep[REP_PERIOD] = period[i];

	while (j < ARRAY_SIZE(delay) - 1 && delay[j] < dev->rep[REP_DELAY])
		j++;
	dev->rep[REP_DELAY] = delay[j];

	param = i | (j << 5);
	return ps2_command(&atkbd->ps2dev, &param, ATKBD_CMD_SETREP);
}

static int atkbd_set_leds(struct atkbd *atkbd)
{
	struct input_dev *dev = atkbd->dev;
	unsigned char param[2];

	param[0] = (test_bit(LED_SCROLLL, dev->led) ? 1 : 0)
		 | (test_bit(LED_NUML,    dev->led) ? 2 : 0)
		 | (test_bit(LED_CAPSL,   dev->led) ? 4 : 0);
	if (ps2_command(&atkbd->ps2dev, param, ATKBD_CMD_SETLEDS))
		return -1;

	if (atkbd->extra) {
		param[0] = 0;
		param[1] = (test_bit(LED_COMPOSE, dev->led) ? 0x01 : 0)
			 | (test_bit(LED_SLEEP,   dev->led) ? 0x02 : 0)
			 | (test_bit(LED_SUSPEND, dev->led) ? 0x04 : 0)
			 | (test_bit(LED_MISC,    dev->led) ? 0x10 : 0)
			 | (test_bit(LED_MUTE,    dev->led) ? 0x20 : 0);
		if (ps2_command(&atkbd->ps2dev, param, ATKBD_CMD_EX_SETLEDS))
			return -1;
	}

	return 0;
}

/*
 * atkbd_event_work() is used to complete processing of events that
 * can not be processed by input_event() which is often called from
 * interrupt context.
 */

static void atkbd_event_work(struct work_struct *work)
{
	struct atkbd *atkbd = container_of(work, struct atkbd, event_work.work);

	mutex_lock(&atkbd->mutex);

	if (!atkbd->enabled) {
		/*
		 * Serio ports are resumed asynchronously so while driver core
		 * thinks that device is already fully operational in reality
		 * it may not be ready yet. In this case we need to keep
		 * rescheduling till reconnect completes.
		 */
		schedule_delayed_work(&atkbd->event_work,
					msecs_to_jiffies(100));
	} else {
		if (test_and_clear_bit(ATKBD_LED_EVENT_BIT, &atkbd->event_mask))
			atkbd_set_leds(atkbd);

		if (test_and_clear_bit(ATKBD_REP_EVENT_BIT, &atkbd->event_mask))
			atkbd_set_repeat_rate(atkbd);
	}

	mutex_unlock(&atkbd->mutex);
}

/*
 * Schedule switch for execution. We need to throttle requests,
 * otherwise keyboard may become unresponsive.
 */
static void atkbd_schedule_event_work(struct atkbd *atkbd, int event_bit)
{
	unsigned long delay = msecs_to_jiffies(50);

	if (time_after(jiffies, atkbd->event_jiffies + delay))
		delay = 0;

	atkbd->event_jiffies = jiffies;
	set_bit(event_bit, &atkbd->event_mask);
	mb();
	schedule_delayed_work(&atkbd->event_work, delay);
}

/*
 * Event callback from the input module. Events that change the state of
 * the hardware are processed here. If action can not be performed in
 * interrupt context it is offloaded to atkbd_event_work.
 */

static int atkbd_event(struct input_dev *dev,
			unsigned int type, unsigned int code, int value)
{
	struct atkbd *atkbd = input_get_drvdata(dev);

	if (!atkbd->write)
		return -1;

	switch (type) {

	case EV_LED:
		atkbd_schedule_event_work(atkbd, ATKBD_LED_EVENT_BIT);
		return 0;

	case EV_REP:
		if (!atkbd->softrepeat)
			atkbd_schedule_event_work(atkbd, ATKBD_REP_EVENT_BIT);
		return 0;

	default:
		return -1;
	}
}

/*
 * atkbd_enable() signals that interrupt handler is allowed to
 * generate input events.
 */

static inline void atkbd_enable(struct atkbd *atkbd)
{
	serio_pause_rx(atkbd->ps2dev.serio);
	atkbd->enabled = true;
	serio_continue_rx(atkbd->ps2dev.serio);
}

/*
 * atkbd_disable() tells input handler that all incoming data except
 * for ACKs and command response should be dropped.
 */

static inline void atkbd_disable(struct atkbd *atkbd)
{
	serio_pause_rx(atkbd->ps2dev.serio);
	atkbd->enabled = false;
	serio_continue_rx(atkbd->ps2dev.serio);
}

/*
 * atkbd_probe() probes for an AT keyboard on a serio port.
 */

static int atkbd_probe(struct atkbd *atkbd)
{
	struct ps2dev *ps2dev = &atkbd->ps2dev;
	unsigned char param[2];

/*
 * Some systems, where the bit-twiddling when testing the io-lines of the
 * controller may confuse the keyboard need a full reset of the keyboard. On
 * these systems the BIOS also usually doesn't do it for us.
 */

	if (atkbd_reset)
		if (ps2_command(ps2dev, NULL, ATKBD_CMD_RESET_BAT))
			dev_warn(&ps2dev->serio->dev,
				 "keyboard reset failed on %s\n",
				 ps2dev->serio->phys);

/*
 * Then we check the keyboard ID. We should get 0xab83 under normal conditions.
 * Some keyboards report different values, but the first byte is always 0xab or
 * 0xac. Some old AT keyboards don't report anything. If a mouse is connected, this
 * should make sure we don't try to set the LEDs on it.
 */

	param[0] = param[1] = 0xa5;	/* initialize with invalid values */
	if (ps2_command(ps2dev, param, ATKBD_CMD_GETID)) {

/*
 * If the get ID command failed, we check if we can at least set the LEDs on
 * the keyboard. This should work on every keyboard out there. It also turns
 * the LEDs off, which we want anyway.
 */
		param[0] = 0;
		if (ps2_command(ps2dev, param, ATKBD_CMD_SETLEDS))
			return -1;
		atkbd->id = 0xabba;
		return 0;
	}

	if (!ps2_is_keyboard_id(param[0]))
		return -1;

	atkbd->id = (param[0] << 8) | param[1];

	if (atkbd->id == 0xaca1 && atkbd->translated) {
		dev_err(&ps2dev->serio->dev,
			"NCD terminal keyboards are only supported on non-translating controlelrs. "
			"Use i8042.direct=1 to disable translation.\n");
		return -1;
	}

	return 0;
}

/*
 * atkbd_select_set checks if a keyboard has a working Set 3 support, and
 * sets it into that. Unfortunately there are keyboards that can be switched
 * to Set 3, but don't work well in that (BTC Multimedia ...)
 */

static int atkbd_select_set(struct atkbd *atkbd, int target_set, int allow_extra)
{
	struct ps2dev *ps2dev = &atkbd->ps2dev;
	unsigned char param[2];

	atkbd->extra = false;
/*
 * For known special keyboards we can go ahead and set the correct set.
 * We check for NCD PS/2 Sun, NorthGate OmniKey 101 and
 * IBM RapidAccess / IBM EzButton / Chicony KBP-8993 keyboards.
 */

	if (atkbd->translated)
		return 2;

	if (atkbd->id == 0xaca1) {
		param[0] = 3;
		ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET);
		return 3;
	}

	if (allow_extra) {
		param[0] = 0x71;
		if (!ps2_command(ps2dev, param, ATKBD_CMD_EX_ENABLE)) {
			atkbd->extra = true;
			return 2;
		}
	}

	if (target_set != 3)
		return 2;

	if (!ps2_command(ps2dev, param, ATKBD_CMD_OK_GETID)) {
		atkbd->id = param[0] << 8 | param[1];
		return 2;
	}

	param[0] = 3;
	if (ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET))
		return 2;

	param[0] = 0;
	if (ps2_command(ps2dev, param, ATKBD_CMD_GSCANSET))
		return 2;

	if (param[0] != 3) {
		param[0] = 2;
		if (ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET))
		return 2;
	}

	ps2_command(ps2dev, param, ATKBD_CMD_SETALL_MBR);

	return 3;
}

static int atkbd_reset_state(struct atkbd *atkbd)
{
        struct ps2dev *ps2dev = &atkbd->ps2dev;
	unsigned char param[1];

/*
 * Set the LEDs to a predefined state (all off).
 */

	param[0] = 0;
	if (ps2_command(ps2dev, param, ATKBD_CMD_SETLEDS))
		return -1;

/*
 * Set autorepeat to fastest possible.
 */

	param[0] = 0;
	if (ps2_command(ps2dev, param, ATKBD_CMD_SETREP))
		return -1;

	return 0;
}

static int atkbd_activate(struct atkbd *atkbd)
{
	struct ps2dev *ps2dev = &atkbd->ps2dev;

/*
 * Enable the keyboard to receive keystrokes.
 */

	if (ps2_command(ps2dev, NULL, ATKBD_CMD_ENABLE)) {
		dev_err(&ps2dev->serio->dev,
			"Failed to enable keyboard on %s\n",
			ps2dev->serio->phys);
		return -1;
	}

	return 0;
}

/*
 * atkbd_cleanup() restores the keyboard state so that BIOS is happy after a
 * reboot.
 */

static void atkbd_cleanup(struct serio *serio)
{
	struct atkbd *atkbd = serio_get_drvdata(serio);

	atkbd_disable(atkbd);
	ps2_command(&atkbd->ps2dev, NULL, ATKBD_CMD_RESET_DEF);
}


/*
 * atkbd_disconnect() closes and frees.
 */

static void atkbd_disconnect(struct serio *serio)
{
	struct atkbd *atkbd = serio_get_drvdata(serio);

	sysfs_remove_group(&serio->dev.kobj, &atkbd_attribute_group);

	atkbd_disable(atkbd);

	input_unregister_device(atkbd->dev);

	/*
	 * Make sure we don't have a command in flight.
	 * Note that since atkbd->enabled is false event work will keep
	 * rescheduling itself until it gets canceled and will not try
	 * accessing freed input device or serio port.
	 */
	cancel_delayed_work_sync(&atkbd->event_work);

	serio_close(serio);
	serio_set_drvdata(serio, NULL);
	kfree(atkbd);
}

/*
 * generate release events for the keycodes given in data
 */
static void atkbd_apply_forced_release_keylist(struct atkbd* atkbd,
						const void *data)
{
	const unsigned int *keys = data;
	unsigned int i;

	if (atkbd->set == 2)
		for (i = 0; keys[i] != -1U; i++)
			__set_bit(keys[i], atkbd->force_release_mask);
}

/*
 * Most special keys (Fn+F?) on Dell laptops do not generate release
 * events so we have to do it ourselves.
 */
static unsigned int atkbd_dell_laptop_forced_release_keys[] = {
	0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8f, 0x93, -1U
};

/*
 * Perform fixup for HP system that doesn't generate release
 * for its video switch
 */
static unsigned int atkbd_hp_forced_release_keys[] = {
	0x94, -1U
};

/*
 * Samsung NC10,NC20 with Fn+F? key release not working
 */
static unsigned int atkbd_samsung_forced_release_keys[] = {
	0x82, 0x83, 0x84, 0x86, 0x88, 0x89, 0xb3, 0xf7, 0xf9, -1U
};

/*
 * Amilo Pi 3525 key release for Fn+Volume keys not working
 */
static unsigned int atkbd_amilo_pi3525_forced_release_keys[] = {
	0x20, 0xa0, 0x2e, 0xae, 0x30, 0xb0, -1U
};

/*
 * Amilo Xi 3650 key release for light touch bar not working
 */
static unsigned int atkbd_amilo_xi3650_forced_release_keys[] = {
	0x67, 0xed, 0x90, 0xa2, 0x99, 0xa4, 0xae, 0xb0, -1U
};

/*
 * Soltech TA12 system with broken key release on volume keys and mute key
 */
static unsigned int atkdb_soltech_ta12_forced_release_keys[] = {
	0xa0, 0xae, 0xb0, -1U
};

/*
 * Many notebooks don't send key release event for volume up/down
 * keys, with key list below common among them
 */
static unsigned int atkbd_volume_forced_release_keys[] = {
	0xae, 0xb0, -1U
};

/*
 * OQO 01+ multimedia keys (64--66) generate e0 6x upon release whereas
 * they should be generating e4-e6 (0x80 | code).
 */
static unsigned int atkbd_oqo_01plus_scancode_fixup(struct atkbd *atkbd,
						    unsigned int code)
{
	if (atkbd->translated && atkbd->emul == 1 &&
	    (code == 0x64 || code == 0x65 || code == 0x66)) {
		atkbd->emul = 0;
		code |= 0x80;
	}

	return code;
}

/*
 * atkbd_set_keycode_table() initializes keyboard's keycode table
 * according to the selected scancode set
 */

static void atkbd_set_keycode_table(struct atkbd *atkbd)
{
	unsigned int scancode;
	int i, j;

	memset(atkbd->keycode, 0, sizeof(atkbd->keycode));
	bitmap_zero(atkbd->force_release_mask, ATKBD_KEYMAP_SIZE);

	if (atkbd->translated) {
		for (i = 0; i < 128; i++) {
			scancode = atkbd_unxlate_table[i];
			atkbd->keycode[i] = atkbd_set2_keycode[scancode];
			atkbd->keycode[i | 0x80] = atkbd_set2_keycode[scancode | 0x80];
			if (atkbd->scroll)
				for (j = 0; j < ARRAY_SIZE(atkbd_scroll_keys); j++)
					if ((scancode | 0x80) == atkbd_scroll_keys[j].set2)
						atkbd->keycode[i | 0x80] = atkbd_scroll_keys[j].keycode;
		}
	} else if (atkbd->set == 3) {
		memcpy(atkbd->keycode, atkbd_set3_keycode, sizeof(atkbd->keycode));
	} else {
		memcpy(atkbd->keycode, atkbd_set2_keycode, sizeof(atkbd->keycode));

		if (atkbd->scroll)
			for (i = 0; i < ARRAY_SIZE(atkbd_scroll_keys); i++) {
				scancode = atkbd_scroll_keys[i].set2;
				atkbd->keycode[scancode] = atkbd_scroll_keys[i].keycode;
		}
	}

/*
 * HANGEUL and HANJA keys do not send release events so we need to
 * generate such events ourselves
 */
	scancode = atkbd_compat_scancode(atkbd, ATKBD_RET_HANGEUL);
	atkbd->keycode[scancode] = KEY_HANGEUL;
	__set_bit(scancode, atkbd->force_release_mask);

	scancode = atkbd_compat_scancode(atkbd, ATKBD_RET_HANJA);
	atkbd->keycode[scancode] = KEY_HANJA;
	__set_bit(scancode, atkbd->force_release_mask);

/*
 * Perform additional fixups
 */
	if (atkbd_platform_fixup)
		atkbd_platform_fixup(atkbd, atkbd_platform_fixup_data);
}

/*
 * atkbd_set_device_attrs() sets up keyboard's input device structure
 */

static void atkbd_set_device_attrs(struct atkbd *atkbd)
{
	struct input_dev *input_dev = atkbd->dev;
	int i;

	if (atkbd->extra)
		snprintf(atkbd->name, sizeof(atkbd->name),
			 "AT Set 2 Extra keyboard");
	else
		snprintf(atkbd->name, sizeof(atkbd->name),
			 "AT %s Set %d keyboard",
			 atkbd->translated ? "Translated" : "Raw", atkbd->set);

	snprintf(atkbd->phys, sizeof(atkbd->phys),
		 "%s/input0", atkbd->ps2dev.serio->phys);

	input_dev->name = atkbd->name;
	input_dev->phys = atkbd->phys;
	input_dev->id.bustype = BUS_I8042;
	input_dev->id.vendor = 0x0001;
	input_dev->id.product = atkbd->translated ? 1 : atkbd->set;
	input_dev->id.version = atkbd->id;
	input_dev->event = atkbd_event;
	input_dev->dev.parent = &atkbd->ps2dev.serio->dev;

	input_set_drvdata(input_dev, atkbd);

	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) |
		BIT_MASK(EV_MSC);

	if (atkbd->write) {
		input_dev->evbit[0] |= BIT_MASK(EV_LED);
		input_dev->ledbit[0] = BIT_MASK(LED_NUML) |
			BIT_MASK(LED_CAPSL) | BIT_MASK(LED_SCROLLL);
	}

	if (atkbd->extra)
		input_dev->ledbit[0] |= BIT_MASK(LED_COMPOSE) |
			BIT_MASK(LED_SUSPEND) | BIT_MASK(LED_SLEEP) |
			BIT_MASK(LED_MUTE) | BIT_MASK(LED_MISC);

	if (!atkbd->softrepeat) {
		input_dev->rep[REP_DELAY] = 250;
		input_dev->rep[REP_PERIOD] = 33;
	}

	input_dev->mscbit[0] = atkbd->softraw ? BIT_MASK(MSC_SCAN) :
		BIT_MASK(MSC_RAW) | BIT_MASK(MSC_SCAN);

	if (atkbd->scroll) {
		input_dev->evbit[0] |= BIT_MASK(EV_REL);
		input_dev->relbit[0] = BIT_MASK(REL_WHEEL) |
			BIT_MASK(REL_HWHEEL);
		__set_bit(BTN_MIDDLE, input_dev->keybit);
	}

	input_dev->keycode = atkbd->keycode;
	input_dev->keycodesize = sizeof(unsigned short);
	input_dev->keycodemax = ARRAY_SIZE(atkbd_set2_keycode);

	for (i = 0; i < ATKBD_KEYMAP_SIZE; i++) {
		if (atkbd->keycode[i] != KEY_RESERVED &&
		    atkbd->keycode[i] != ATKBD_KEY_NULL &&
		    atkbd->keycode[i] < ATKBD_SPECIAL) {
			__set_bit(atkbd->keycode[i], input_dev->keybit);
		}
	}
}

/*
 * atkbd_connect() is called when the serio module finds an interface
 * that isn't handled yet by an appropriate device driver. We check if
 * there is an AT keyboard out there and if yes, we register ourselves
 * to the input module.
 */

static int atkbd_connect(struct serio *serio, struct serio_driver *drv)
{
	struct atkbd *atkbd;
	struct input_dev *dev;
	int err = -ENOMEM;

	atkbd = kzalloc(sizeof(struct atkbd), GFP_KERNEL);
	dev = input_allocate_device();
	if (!atkbd || !dev)
		goto fail1;

	atkbd->dev = dev;
	ps2_init(&atkbd->ps2dev, serio);
	INIT_DELAYED_WORK(&atkbd->event_work, atkbd_event_work);
	mutex_init(&atkbd->mutex);

	switch (serio->id.type) {

	case SERIO_8042_XL:
		atkbd->translated = true;
		/* Fall through */

	case SERIO_8042:
		if (serio->write)
			atkbd->write = true;
		break;
	}

	atkbd->softraw = atkbd_softraw;
	atkbd->softrepeat = atkbd_softrepeat;
	atkbd->scroll = atkbd_scroll;

	if (atkbd->softrepeat)
		atkbd->softraw = true;

	serio_set_drvdata(serio, atkbd);

	err = serio_open(serio, drv);
	if (err)
		goto fail2;

	if (atkbd->write) {

		if (atkbd_probe(atkbd)) {
			err = -ENODEV;
			goto fail3;
		}

		atkbd->set = atkbd_select_set(atkbd, atkbd_set, atkbd_extra);
		atkbd_reset_state(atkbd);
		atkbd_activate(atkbd);

	} else {
		atkbd->set = 2;
		atkbd->id = 0xab00;
	}

	atkbd_set_keycode_table(atkbd);
	atkbd_set_device_attrs(atkbd);

	err = sysfs_create_group(&serio->dev.kobj, &atkbd_attribute_group);
	if (err)
		goto fail3;

	atkbd_enable(atkbd);

	err = input_register_device(atkbd->dev);
	if (err)
		goto fail4;

	return 0;

 fail4: sysfs_remove_group(&serio->dev.kobj, &atkbd_attribute_group);
 fail3:	serio_close(serio);
 fail2:	serio_set_drvdata(serio, NULL);
 fail1:	input_free_device(dev);
	kfree(atkbd);
	return err;
}

/*
 * atkbd_reconnect() tries to restore keyboard into a sane state and is
 * most likely called on resume.
 */

static int atkbd_reconnect(struct serio *serio)
{
	struct atkbd *atkbd = serio_get_drvdata(serio);
	struct serio_driver *drv = serio->drv;
	int retval = -1;

	if (!atkbd || !drv) {
		dev_dbg(&serio->dev,
			"reconnect request, but serio is disconnected, ignoring...\n");
		return -1;
	}

	mutex_lock(&atkbd->mutex);

	atkbd_disable(atkbd);

	if (atkbd->write) {
		if (atkbd_probe(atkbd))
			goto out;

		if (atkbd->set != atkbd_select_set(atkbd, atkbd->set, atkbd->extra))
			goto out;

		atkbd_activate(atkbd);

		/*
		 * Restore LED state and repeat rate. While input core
		 * will do this for us at resume time reconnect may happen
		 * because user requested it via sysfs or simply because
		 * keyboard was unplugged and plugged in again so we need
		 * to do it ourselves here.
		 */
		atkbd_set_leds(atkbd);
		if (!atkbd->softrepeat)
			atkbd_set_repeat_rate(atkbd);

	}

	atkbd_enable(atkbd);
	retval = 0;

 out:
	mutex_unlock(&atkbd->mutex);
	return retval;
}

static struct serio_device_id atkbd_serio_ids[] = {
	{
		.type	= SERIO_8042,
		.proto	= SERIO_ANY,
		.id	= SERIO_ANY,
		.extra	= SERIO_ANY,
	},
	{
		.type	= SERIO_8042_XL,
		.proto	= SERIO_ANY,
		.id	= SERIO_ANY,
		.extra	= SERIO_ANY,
	},
	{
		.type	= SERIO_RS232,
		.proto	= SERIO_PS2SER,
		.id	= SERIO_ANY,
		.extra	= SERIO_ANY,
	},
	{ 0 }
};

MODULE_DEVICE_TABLE(serio, atkbd_serio_ids);

static struct serio_driver atkbd_drv = {
	.driver		= {
		.name	= "atkbd",
	},
	.description	= DRIVER_DESC,
	.id_table	= atkbd_serio_ids,
	.interrupt	= atkbd_interrupt,
	.connect	= atkbd_connect,
	.reconnect	= atkbd_reconnect,
	.disconnect	= atkbd_disconnect,
	.cleanup	= atkbd_cleanup,
};

static ssize_t atkbd_attr_show_helper(struct device *dev, char *buf,
				ssize_t (*handler)(struct atkbd *, char *))
{
	struct serio *serio = to_serio_port(dev);
	struct atkbd *atkbd = serio_get_drvdata(serio);

	return handler(atkbd, buf);
}

static ssize_t atkbd_attr_set_helper(struct device *dev, const char *buf, size_t count,
				ssize_t (*handler)(struct atkbd *, const char *, size_t))
{
	struct serio *serio = to_serio_port(dev);
	struct atkbd *atkbd = serio_get_drvdata(serio);
	int retval;

	retval = mutex_lock_interruptible(&atkbd->mutex);
	if (retval)
		return retval;

	atkbd_disable(atkbd);
	retval = handler(atkbd, buf, count);
	atkbd_enable(atkbd);

	mutex_unlock(&atkbd->mutex);

	return retval;
}

static ssize_t atkbd_show_extra(struct atkbd *atkbd, char *buf)
{
	return sprintf(buf, "%d\n", atkbd->extra ? 1 : 0);
}

static ssize_t atkbd_set_extra(struct atkbd *atkbd, const char *buf, size_t count)
{
	struct input_dev *old_dev, *new_dev;
	unsigned long value;
	int err;
	bool old_extra;
	unsigned char old_set;

	if (!atkbd->write)
		return -EIO;

	if (strict_strtoul(buf, 10, &value) || value > 1)
		return -EINVAL;

	if (atkbd->extra != value) {
		/*
		 * Since device's properties will change we need to
		 * unregister old device. But allocate and register
		 * new one first to make sure we have it.
		 */
		old_dev = atkbd->dev;
		old_extra = atkbd->extra;
		old_set = atkbd->set;

		new_dev = input_allocate_device();
		if (!new_dev)
			return -ENOMEM;

		atkbd->dev = new_dev;
		atkbd->set = atkbd_select_set(atkbd, atkbd->set, value);
		atkbd_reset_state(atkbd);
		atkbd_activate(atkbd);
		atkbd_set_keycode_table(atkbd);
		atkbd_set_device_attrs(atkbd);

		err = input_register_device(atkbd->dev);
		if (err) {
			input_free_device(new_dev);

			atkbd->dev = old_dev;
			atkbd->set = atkbd_select_set(atkbd, old_set, old_extra);
			atkbd_set_keycode_table(atkbd);
			atkbd_set_device_attrs(atkbd);

			return err;
		}
		input_unregister_device(old_dev);

	}
	return count;
}

static ssize_t atkbd_show_force_release(struct atkbd *atkbd, char *buf)
{
	size_t len = bitmap_scnlistprintf(buf, PAGE_SIZE - 2,
			atkbd->force_release_mask, ATKBD_KEYMAP_SIZE);

	buf[len++] = '\n';
	buf[len] = '\0';

	return len;
}

static ssize_t atkbd_set_force_release(struct atkbd *atkbd,
					const char *buf, size_t count)
{
	/* 64 bytes on stack should be acceptable */
	DECLARE_BITMAP(new_mask, ATKBD_KEYMAP_SIZE);
	int err;

	err = bitmap_parselist(buf, new_mask, ATKBD_KEYMAP_SIZE);
	if (err)
		return err;

	memcpy(atkbd->force_release_mask, new_mask, sizeof(atkbd->force_release_mask));
	return count;
}


static ssize_t atkbd_show_scroll(struct atkbd *atkbd, char *buf)
{
	return sprintf(buf, "%d\n", atkbd->scroll ? 1 : 0);
}

static ssize_t atkbd_set_scroll(struct atkbd *atkbd, const char *buf, size_t count)
{
	struct input_dev *old_dev, *new_dev;
	unsigned long value;
	int err;
	bool old_scroll;

	if (strict_strtoul(buf, 10, &value) || value > 1)
		return -EINVAL;

	if (atkbd->scroll != value) {
		old_dev = atkbd->dev;
		old_scroll = atkbd->scroll;

		new_dev = input_allocate_device();
		if (!new_dev)
			return -ENOMEM;

		atkbd->dev = new_dev;
		atkbd->scroll = value;
		atkbd_set_keycode_table(atkbd);
		atkbd_set_device_attrs(atkbd);

		err = input_register_device(atkbd->dev);
		if (err) {
			input_free_device(new_dev);

			atkbd->scroll = old_scroll;
			atkbd->dev = old_dev;
			atkbd_set_keycode_table(atkbd);
			atkbd_set_device_attrs(atkbd);

			return err;
		}
		input_unregister_device(old_dev);
	}
	return count;
}

static ssize_t atkbd_show_set(struct atkbd *atkbd, char *buf)
{
	return sprintf(buf, "%d\n", atkbd->set);
}

static ssize_t atkbd_set_set(struct atkbd *atkbd, const char *buf, size_t count)
{
	struct input_dev *old_dev, *new_dev;
	unsigned long value;
	int err;
	unsigned char old_set;
	bool old_extra;

	if (!atkbd->write)
		return -EIO;

	if (strict_strtoul(buf, 10, &value) || (value != 2 && value != 3))
		return -EINVAL;

	if (atkbd->set != value) {
		old_dev = atkbd->dev;
		old_extra = atkbd->extra;
		old_set = atkbd->set;

		new_dev = input_allocate_device();
		if (!new_dev)
			return -ENOMEM;

		atkbd->dev = new_dev;
		atkbd->set = atkbd_select_set(atkbd, value, atkbd->extra);
		atkbd_reset_state(atkbd);
		atkbd_activate(atkbd);
		atkbd_set_keycode_table(atkbd);
		atkbd_set_device_attrs(atkbd);

		err = input_register_device(atkbd->dev);
		if (err) {
			input_free_device(new_dev);

			atkbd->dev = old_dev;
			atkbd->set = atkbd_select_set(atkbd, old_set, old_extra);
			atkbd_set_keycode_table(atkbd);
			atkbd_set_device_attrs(atkbd);

			return err;
		}
		input_unregister_device(old_dev);
	}
	return count;
}

static ssize_t atkbd_show_softrepeat(struct atkbd *atkbd, char *buf)
{
	return sprintf(buf, "%d\n", atkbd->softrepeat ? 1 : 0);
}

static ssize_t atkbd_set_softrepeat(struct atkbd *atkbd, const char *buf, size_t count)
{
	struct input_dev *old_dev, *new_dev;
	unsigned long value;
	int err;
	bool old_softrepeat, old_softraw;

	if (!atkbd->write)
		return -EIO;

	if (strict_strtoul(buf, 10, &value) || value > 1)
		return -EINVAL;

	if (atkbd->softrepeat != value) {
		old_dev = atkbd->dev;
		old_softrepeat = atkbd->softrepeat;
		old_softraw = atkbd->softraw;

		new_dev = input_allocate_device();
		if (!new_dev)
			return -ENOMEM;

		atkbd->dev = new_dev;
		atkbd->softrepeat = value;
		if (atkbd->softrepeat)
			atkbd->softraw = true;
		atkbd_set_device_attrs(atkbd);

		err = input_register_device(atkbd->dev);
		if (err) {
			input_free_device(new_dev);

			atkbd->dev = old_dev;
			atkbd->softrepeat = old_softrepeat;
			atkbd->softraw = old_softraw;
			atkbd_set_device_attrs(atkbd);

			return err;
		}
		input_unregister_device(old_dev);
	}
	return count;
}


static ssize_t atkbd_show_softraw(struct atkbd *atkbd, char *buf)
{
	return sprintf(buf, "%d\n", atkbd->softraw ? 1 : 0);
}

static ssize_t atkbd_set_softraw(struct atkbd *atkbd, const char *buf, size_t count)
{
	struct input_dev *old_dev, *new_dev;
	unsigned long value;
	int err;
	bool old_softraw;

	if (strict_strtoul(buf, 10, &value) || value > 1)
		return -EINVAL;

	if (atkbd->softraw != value) {
		old_dev = atkbd->dev;
		old_softraw = atkbd->softraw;

		new_dev = input_allocate_device();
		if (!new_dev)
			return -ENOMEM;

		atkbd->dev = new_dev;
		atkbd->softraw = value;
		atkbd_set_device_attrs(atkbd);

		err = input_register_device(atkbd->dev);
		if (err) {
			input_free_device(new_dev);

			atkbd->dev = old_dev;
			atkbd->softraw = old_softraw;
			atkbd_set_device_attrs(atkbd);

			return err;
		}
		input_unregister_device(old_dev);
	}
	return count;
}

static ssize_t atkbd_show_err_count(struct atkbd *atkbd, char *buf)
{
	return sprintf(buf, "%lu\n", atkbd->err_count);
}

static int __init atkbd_setup_forced_release(const struct dmi_system_id *id)
{
	atkbd_platform_fixup = atkbd_apply_forced_release_keylist;
	atkbd_platform_fixup_data = id->driver_data;

	return 0;
}

static int __init atkbd_setup_scancode_fixup(const struct dmi_system_id *id)
{
	atkbd_platform_scancode_fixup = id->driver_data;

	return 0;
}

static const struct dmi_system_id atkbd_dmi_quirk_table[] __initconst = {
	{
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_CHASSIS_TYPE, "8"), /* Portable */
		},
		.callback = atkbd_setup_forced_release,
		.driver_data = atkbd_dell_laptop_forced_release_keys,
	},
	{
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
			DMI_MATCH(DMI_CHASSIS_TYPE, "8"), /* Portable */
		},
		.callback = atkbd_setup_forced_release,
		.driver_data = atkbd_dell_laptop_forced_release_keys,
	},
	{
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
			DMI_MATCH(DMI_PRODUCT_NAME, "HP 2133"),
		},
		.callback = atkbd_setup_forced_release,
		.driver_data = atkbd_hp_forced_release_keys,
	},
	{
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Pavilion ZV6100"),
		},
		.callback = atkbd_setup_forced_release,
		.driver_data = atkbd_volume_forced_release_keys,
	},
	{
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Presario R4000"),
		},
		.callback = atkbd_setup_forced_release,
		.driver_data = atkbd_volume_forced_release_keys,
	},
	{
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Presario R4100"),
		},
		.callback = atkbd_setup_forced_release,
		.driver_data = atkbd_volume_forced_release_keys,
	},
	{
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Presario R4200"),
		},
		.callback = atkbd_setup_forced_release,
		.driver_data = atkbd_volume_forced_release_keys,
	},
	{
		/* Inventec Symphony */
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "INVENTEC"),
			DMI_MATCH(DMI_PRODUCT_NAME, "SYMPHONY 6.0/7.0"),
		},
		.callback = atkbd_setup_forced_release,
		.driver_data = atkbd_volume_forced_release_keys,
	},
	{
		/* Samsung NC10 */
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
			DMI_MATCH(DMI_PRODUCT_NAME, "NC10"),
		},
		.callback = atkbd_setup_forced_release,
		.driver_data = atkbd_samsung_forced_release_keys,
	},
	{
		/* Samsung NC20 */
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
			DMI_MATCH(DMI_PRODUCT_NAME, "NC20"),
		},
		.callback = atkbd_setup_forced_release,
		.driver_data = atkbd_samsung_forced_release_keys,
	},
	{
		/* Samsung SQ45S70S */
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
			DMI_MATCH(DMI_PRODUCT_NAME, "SQ45S70S"),
		},
		.callback = atkbd_setup_forced_release,
		.driver_data = atkbd_samsung_forced_release_keys,
	},
	{
		/* Fujitsu Amilo PA 1510 */
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
			DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Pa 1510"),
		},
		.callback = atkbd_setup_forced_release,
		.driver_data = atkbd_volume_forced_release_keys,
	},
	{
		/* Fujitsu Amilo Pi 3525 */
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
			DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Pi 3525"),
		},
		.callback = atkbd_setup_forced_release,
		.driver_data = atkbd_amilo_pi3525_forced_release_keys,
	},
	{
		/* Fujitsu Amilo Xi 3650 */
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
			DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Xi 3650"),
		},
		.callback = atkbd_setup_forced_release,
		.driver_data = atkbd_amilo_xi3650_forced_release_keys,
	},
	{
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Soltech Corporation"),
			DMI_MATCH(DMI_PRODUCT_NAME, "TA12"),
		},
		.callback = atkbd_setup_forced_release,
		.driver_data = atkdb_soltech_ta12_forced_release_keys,
	},
	{
		/* OQO Model 01+ */
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "OQO"),
			DMI_MATCH(DMI_PRODUCT_NAME, "ZEPTO"),
		},
		.callback = atkbd_setup_scancode_fixup,
		.driver_data = atkbd_oqo_01plus_scancode_fixup,
	},
	{ }
};

static int __init atkbd_init(void)
{
	dmi_check_system(atkbd_dmi_quirk_table);

	return serio_register_driver(&atkbd_drv);
}

static void __exit atkbd_exit(void)
{
	serio_unregister_driver(&atkbd_drv);
}

module_init(atkbd_init);
module_exit(atkbd_exit);