aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/char/keyboard.c
blob: 950837cf9e9c3881718d161e4185c6fc1194b9cb (plain) (blame)
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
/*
 * linux/drivers/char/keyboard.c
 *
 * Written for linux by Johan Myreen as a translation from
 * the assembly version by Linus (with diacriticals added)
 *
 * Some additional features added by Christoph Niemann (ChN), March 1993
 *
 * Loadable keymaps by Risto Kankkunen, May 1993
 *
 * Diacriticals redone & other small changes, aeb@cwi.nl, June 1993
 * Added decr/incr_console, dynamic keymaps, Unicode support,
 * dynamic function/string keys, led setting,  Sept 1994
 * `Sticky' modifier keys, 951006.
 *
 * 11-11-96: SAK should now work in the raw mode (Martin Mares)
 *
 * Modified to provide 'generic' keyboard support by Hamish Macdonald
 * Merge with the m68k keyboard driver and split-off of the PC low-level
 * parts by Geert Uytterhoeven, May 1997
 *
 * 27-05-97: Added support for the Magic SysRq Key (Martin Mares)
 * 30-07-98: Dead keys redone, aeb@cwi.nl.
 * 21-08-02: Converted to input API, major cleanup. (Vojtech Pavlik)
 */

#include <linux/consolemap.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/irq.h>

#include <linux/kbd_kern.h>
#include <linux/kbd_diacr.h>
#include <linux/vt_kern.h>
#include <linux/sysrq.h>
#include <linux/input.h>
#include <linux/reboot.h>
#include <linux/notifier.h>
#include <linux/jiffies.h>

extern void ctrl_alt_del(void);

#define to_handle_h(n) container_of(n, struct input_handle, h_node)

/*
 * Exported functions/variables
 */

#define KBD_DEFMODE ((1 << VC_REPEAT) | (1 << VC_META))

/*
 * Some laptops take the 789uiojklm,. keys as number pad when NumLock is on.
 * This seems a good reason to start with NumLock off. On HIL keyboards
 * of PARISC machines however there is no NumLock key and everyone expects the keypad
 * to be used for numbers.
 */

#if defined(CONFIG_PARISC) && (defined(CONFIG_KEYBOARD_HIL) || defined(CONFIG_KEYBOARD_HIL_OLD))
#define KBD_DEFLEDS (1 << VC_NUMLOCK)
#else
#define KBD_DEFLEDS 0
#endif

#define KBD_DEFLOCK 0

void compute_shiftstate(void);

/*
 * Handler Tables.
 */

#define K_HANDLERS\
	k_self,		k_fn,		k_spec,		k_pad,\
	k_dead,		k_cons,		k_cur,		k_shift,\
	k_meta,		k_ascii,	k_lock,		k_lowercase,\
	k_slock,	k_dead2,	k_brl,		k_ignore

typedef void (k_handler_fn)(struct vc_data *vc, unsigned char value,
			    char up_flag);
static k_handler_fn K_HANDLERS;
k_handler_fn *k_handler[16] = { K_HANDLERS };
EXPORT_SYMBOL_GPL(k_handler);

#define FN_HANDLERS\
	fn_null,	fn_enter,	fn_show_ptregs,	fn_show_mem,\
	fn_show_state,	fn_send_intr,	fn_lastcons,	fn_caps_toggle,\
	fn_num,		fn_hold,	fn_scroll_forw,	fn_scroll_back,\
	fn_boot_it,	fn_caps_on,	fn_compose,	fn_SAK,\
	fn_dec_console, fn_inc_console, fn_spawn_con,	fn_bare_num

typedef void (fn_handler_fn)(struct vc_data *vc);
static fn_handler_fn FN_HANDLERS;
static fn_handler_fn *fn_handler[] = { FN_HANDLERS };

/*
 * Variables exported for vt_ioctl.c
 */

/* maximum values each key_handler can handle */
const int max_vals[] = {
	255, ARRAY_SIZE(func_table) - 1, ARRAY_SIZE(fn_handler) - 1, NR_PAD - 1,
	NR_DEAD - 1, 255, 3, NR_SHIFT - 1, 255, NR_ASCII - 1, NR_LOCK - 1,
	255, NR_LOCK - 1, 255, NR_BRL - 1
};

const int NR_TYPES = ARRAY_SIZE(max_vals);

struct kbd_struct kbd_table[MAX_NR_CONSOLES];
EXPORT_SYMBOL_GPL(kbd_table);
static struct kbd_struct *kbd = kbd_table;

struct vt_spawn_console vt_spawn_con = {
	.lock = __SPIN_LOCK_UNLOCKED(vt_spawn_con.lock),
	.pid  = NULL,
	.sig  = 0,
};

/*
 * Variables exported for vt.c
 */

int shift_state = 0;

/*
 * Internal Data.
 */

static struct input_handler kbd_handler;
static unsigned long key_down[BITS_TO_LONGS(KEY_CNT)];	/* keyboard key bitmap */
static unsigned char shift_down[NR_SHIFT];		/* shift state counters.. */
static int dead_key_next;
static int npadch = -1;					/* -1 or number assembled on pad */
static unsigned int diacr;
static char rep;					/* flag telling character repeat */

static unsigned char ledstate = 0xff;			/* undefined */
static unsigned char ledioctl;

static struct ledptr {
	unsigned int *addr;
	unsigned int mask;
	unsigned char valid:1;
} ledptrs[3];

/* Simple translation table for the SysRq keys */

#ifdef CONFIG_MAGIC_SYSRQ
unsigned char kbd_sysrq_xlate[KEY_MAX + 1] =
        "\000\0331234567890-=\177\t"                    /* 0x00 - 0x0f */
        "qwertyuiop[]\r\000as"                          /* 0x10 - 0x1f */
        "dfghjkl;'`\000\\zxcv"                          /* 0x20 - 0x2f */
        "bnm,./\000*\000 \000\201\202\203\204\205"      /* 0x30 - 0x3f */
        "\206\207\210\211\212\000\000789-456+1"         /* 0x40 - 0x4f */
        "230\177\000\000\213\214\000\000\000\000\000\000\000\000\000\000" /* 0x50 - 0x5f */
        "\r\000/";                                      /* 0x60 - 0x6f */
static int sysrq_down;
static int sysrq_alt_use;
#endif
static int sysrq_alt;

/*
 * Notifier list for console keyboard events
 */
static ATOMIC_NOTIFIER_HEAD(keyboard_notifier_list);

int register_keyboard_notifier(struct notifier_block *nb)
{
	return atomic_notifier_chain_register(&keyboard_notifier_list, nb);
}
EXPORT_SYMBOL_GPL(register_keyboard_notifier);

int unregister_keyboard_notifier(struct notifier_block *nb)
{
	return atomic_notifier_chain_unregister(&keyboard_notifier_list, nb);
}
EXPORT_SYMBOL_GPL(unregister_keyboard_notifier);

/*
 * Translation of scancodes to keycodes. We set them on only the first
 * keyboard in the list that accepts the scancode and keycode.
 * Explanation for not choosing the first attached keyboard anymore:
 *  USB keyboards for example have two event devices: one for all "normal"
 *  keys and one for extra function keys (like "volume up", "make coffee",
 *  etc.). So this means that scancodes for the extra function keys won't
 *  be valid for the first event device, but will be for the second.
 */
int getkeycode(unsigned int scancode)
{
	struct input_handle *handle;
	int keycode;
	int error = -ENODEV;

	list_for_each_entry(handle, &kbd_handler.h_list, h_node) {
		error = input_get_keycode(handle->dev, scancode, &keycode);
		if (!error)
			return keycode;
	}

	return error;
}

int setkeycode(unsigned int scancode, unsigned int keycode)
{
	struct input_handle *handle;
	int error = -ENODEV;

	list_for_each_entry(handle, &kbd_handler.h_list, h_node) {
		error = input_set_keycode(handle->dev, scancode, keycode);
		if (!error)
			break;
	}

	return error;
}

/*
 * Making beeps and bells.
 */
static void kd_nosound(unsigned long ignored)
{
	struct input_handle *handle;

	list_for_each_entry(handle, &kbd_handler.h_list, h_node) {
		if (test_bit(EV_SND, handle->dev->evbit)) {
			if (test_bit(SND_TONE, handle->dev->sndbit))
				input_inject_event(handle, EV_SND, SND_TONE, 0);
			if (test_bit(SND_BELL, handle->dev->sndbit))
				input_inject_event(handle, EV_SND, SND_BELL, 0);
		}
	}
}

static DEFINE_TIMER(kd_mksound_timer, kd_nosound, 0, 0);

void kd_mksound(unsigned int hz, unsigned int ticks)
{
	struct list_head *node;

	del_timer(&kd_mksound_timer);

	if (hz) {
		list_for_each_prev(node, &kbd_handler.h_list) {
			struct input_handle *handle = to_handle_h(node);
			if (test_bit(EV_SND, handle->dev->evbit)) {
				if (test_bit(SND_TONE, handle->dev->sndbit)) {
					input_inject_event(handle, EV_SND, SND_TONE, hz);
					break;
				}
				if (test_bit(SND_BELL, handle->dev->sndbit)) {
					input_inject_event(handle, EV_SND, SND_BELL, 1);
					break;
				}
			}
		}
		if (ticks)
			mod_timer(&kd_mksound_timer, jiffies + ticks);
	} else
		kd_nosound(0);
}
EXPORT_SYMBOL(kd_mksound);

/*
 * Setting the keyboard rate.
 */

int kbd_rate(struct kbd_repeat *rep)
{
	struct list_head *node;
	unsigned int d = 0;
	unsigned int p = 0;

	list_for_each(node, &kbd_handler.h_list) {
		struct input_handle *handle = to_handle_h(node);
		struct input_dev *dev = handle->dev;

		if (test_bit(EV_REP, dev->evbit)) {
			if (rep->delay > 0)
				input_inject_event(handle, EV_REP, REP_DELAY, rep->delay);
			if (rep->period > 0)
				input_inject_event(handle, EV_REP, REP_PERIOD, rep->period);
			d = dev->rep[REP_DELAY];
			p = dev->rep[REP_PERIOD];
		}
	}
	rep->delay  = d;
	rep->period = p;
	return 0;
}

/*
 * Helper Functions.
 */
static void put_queue(struct vc_data *vc, int ch)
{
	struct tty_struct *tty = vc->vc_tty;

	if (tty) {
		tty_insert_flip_char(tty, ch, 0);
		con_schedule_flip(tty);
	}
}

static void puts_queue(struct vc_data *vc, char *cp)
{
	struct tty_struct *tty = vc->vc_tty;

	if (!tty)
		return;

	while (*cp) {
		tty_insert_flip_char(tty, *cp, 0);
		cp++;
	}
	con_schedule_flip(tty);
}

static void applkey(struct vc_data *vc, int key, char mode)
{
	static char buf[] = { 0x1b, 'O', 0x00, 0x00 };

	buf[1] = (mode ? 'O' : '[');
	buf[2] = key;
	puts_queue(vc, buf);
}

/*
 * Many other routines do put_queue, but I think either
 * they produce ASCII, or they produce some user-assigned
 * string, and in both cases we might assume that it is
 * in utf-8 already.
 */
static void to_utf8(struct vc_data *vc, uint c)
{
	if (c < 0x80)
		/*  0******* */
		put_queue(vc, c);
	else if (c < 0x800) {
		/* 110***** 10****** */
		put_queue(vc, 0xc0 | (c >> 6));
		put_queue(vc, 0x80 | (c & 0x3f));
    	} else if (c < 0x10000) {
	       	if (c >= 0xD800 && c < 0xE000)
			return;
		if (c == 0xFFFF)
			return;
		/* 1110**** 10****** 10****** */
		put_queue(vc, 0xe0 | (c >> 12));
		put_queue(vc, 0x80 | ((c >> 6) & 0x3f));
		put_queue(vc, 0x80 | (c & 0x3f));
    	} else if (c < 0x110000) {
		/* 11110*** 10****** 10****** 10****** */
		put_queue(vc, 0xf0 | (c >> 18));
		put_queue(vc, 0x80 | ((c >> 12) & 0x3f));
		put_queue(vc, 0x80 | ((c >> 6) & 0x3f));
		put_queue(vc, 0x80 | (c & 0x3f));
	}
}

/*
 * Called after returning from RAW mode or when changing consoles - recompute
 * shift_down[] and shift_state from key_down[] maybe called when keymap is
 * undefined, so that shiftkey release is seen
 */
void compute_shiftstate(void)
{
	unsigned int i, j, k, sym, val;

	shift_state = 0;
	memset(shift_down, 0, sizeof(shift_down));

	for (i = 0; i < ARRAY_SIZE(key_down); i++) {

		if (!key_down[i])
			continue;

		k = i * BITS_PER_LONG;

		for (j = 0; j < BITS_PER_LONG; j++, k++) {

			if (!test_bit(k, key_down))
				continue;

			sym = U(key_maps[0][k]);
			if (KTYP(sym) != KT_SHIFT && KTYP(sym) != KT_SLOCK)
				continue;

			val = KVAL(sym);
			if (val == KVAL(K_CAPSSHIFT))
				val = KVAL(K_SHIFT);

			shift_down[val]++;
			shift_state |= (1 << val);
		}
	}
}

/*
 * We have a combining character DIACR here, followed by the character CH.
 * If the combination occurs in the table, return the corresponding value.
 * Otherwise, if CH is a space or equals DIACR, return DIACR.
 * Otherwise, conclude that DIACR was not combining after all,
 * queue it and return CH.
 */
static unsigned int handle_diacr(struct vc_data *vc, unsigned int ch)
{
	unsigned int d = diacr;
	unsigned int i;

	diacr = 0;

	if ((d & ~0xff) == BRL_UC_ROW) {
		if ((ch & ~0xff) == BRL_UC_ROW)
			return d | ch;
	} else {
		for (i = 0; i < accent_table_size; i++)
			if (accent_table[i].diacr == d && accent_table[i].base == ch)
				return accent_table[i].result;
	}

	if (ch == ' ' || ch == (BRL_UC_ROW|0) || ch == d)
		return d;

	if (kbd->kbdmode == VC_UNICODE)
		to_utf8(vc, d);
	else {
		int c = conv_uni_to_8bit(d);
		if (c != -1)
			put_queue(vc, c);
	}

	return ch;
}

/*
 * Special function handlers
 */
static void fn_enter(struct vc_data *vc)
{
	if (diacr) {
		if (kbd->kbdmode == VC_UNICODE)
			to_utf8(vc, diacr);
		else {
			int c = conv_uni_to_8bit(diacr);
			if (c != -1)
				put_queue(vc, c);
		}
		diacr = 0;
	}
	put_queue(vc, 13);
	if (vc_kbd_mode(kbd, VC_CRLF))
		put_queue(vc, 10);
}

static void fn_caps_toggle(struct vc_data *vc)
{
	if (rep)
		return;
	chg_vc_kbd_led(kbd, VC_CAPSLOCK);
}

static void fn_caps_on(struct vc_data *vc)
{
	if (rep)
		return;
	set_vc_kbd_led(kbd, VC_CAPSLOCK);
}

static void fn_show_ptregs(struct vc_data *vc)
{
	struct pt_regs *regs = get_irq_regs();
	if (regs)
		show_regs(regs);
}

static void fn_hold(struct vc_data *vc)
{
	struct tty_struct *tty = vc->vc_tty;

	if (rep || !tty)
		return;

	/*
	 * Note: SCROLLOCK will be set (cleared) by stop_tty (start_tty);
	 * these routines are also activated by ^S/^Q.
	 * (And SCROLLOCK can also be set by the ioctl KDSKBLED.)
	 */
	if (tty->stopped)
		start_tty(tty);
	else
		stop_tty(tty);
}

static void fn_num(struct vc_data *vc)
{
	if (vc_kbd_mode(kbd,VC_APPLIC))
		applkey(vc, 'P', 1);
	else
		fn_bare_num(vc);
}

/*
 * Bind this to Shift-NumLock if you work in application keypad mode
 * but want to be able to change the NumLock flag.
 * Bind this to NumLock if you prefer that the NumLock key always
 * changes the NumLock flag.
 */
static void fn_bare_num(struct vc_data *vc)
{
	if (!rep)
		chg_vc_kbd_led(kbd, VC_NUMLOCK);
}

static void fn_lastcons(struct vc_data *vc)
{
	/* switch to the last used console, ChN */
	set_console(last_console);
}

static void fn_dec_console(struct vc_data *vc)
{
	int i, cur = fg_console;

	/* Currently switching?  Queue this next switch relative to that. */
	if (want_console != -1)
		cur = want_console;

	for (i = cur - 1; i != cur; i--) {
		if (i == -1)
			i = MAX_NR_CONSOLES - 1;
		if (vc_cons_allocated(i))
			break;
	}
	set_console(i);
}

static void fn_inc_console(struct vc_data *vc)
{
	int i, cur = fg_console;

	/* Currently switching?  Queue this next switch relative to that. */
	if (want_console != -1)
		cur = want_console;

	for (i = cur+1; i != cur; i++) {
		if (i == MAX_NR_CONSOLES)
			i = 0;
		if (vc_cons_allocated(i))
			break;
	}
	set_console(i);
}

static void fn_send_intr(struct vc_data *vc)
{
	struct tty_struct *tty = vc->vc_tty;

	if (!tty)
		return;
	tty_insert_flip_char(tty, 0, TTY_BREAK);
	con_schedule_flip(tty);
}

static void fn_scroll_forw(struct vc_data *vc)
{
	scrollfront(vc, 0);
}

static void fn_scroll_back(struct vc_data *vc)
{
	scrollback(vc, 0);
}

static void fn_show_mem(struct vc_data *vc)
{
	show_mem();
}

static void fn_show_state(struct vc_data *vc)
{
	show_state();
}

static void fn_boot_it(struct vc_data *vc)
{
	ctrl_alt_del();
}

static void fn_compose(struct vc_data *vc)
{
	dead_key_next = 1;
}

static void fn_spawn_con(struct vc_data *vc)
{
	spin_lock(&vt_spawn_con.lock);
	if (vt_spawn_con.pid)
		if (kill_pid(vt_spawn_con.pid, vt_spawn_con.sig, 1)) {
			put_pid(vt_spawn_con.pid);
			vt_spawn_con.pid = NULL;
		}
	spin_unlock(&vt_spawn_con.lock);
}

static void fn_SAK(struct vc_data *vc)
{
	struct work_struct *SAK_work = &vc_cons[fg_console].SAK_work;
	schedule_work(SAK_work);
}

static void fn_null(struct vc_data *vc)
{
	compute_shiftstate();
}

/*
 * Special key handlers
 */
static void k_ignore(struct vc_data *vc, unsigned char value, char up_flag)
{
}

static void k_spec(struct vc_data *vc, unsigned char value, char up_flag)
{
	if (up_flag)
		return;
	if (value >= ARRAY_SIZE(fn_handler))
		return;
	if ((kbd->kbdmode == VC_RAW ||
	     kbd->kbdmode == VC_MEDIUMRAW) &&
	     value != KVAL(K_SAK))
		return;		/* SAK is allowed even in raw mode */
	fn_handler[value](vc);
}

static void k_lowercase(struct vc_data *vc, unsigned char value, char up_flag)
{
	printk(KERN_ERR "keyboard.c: k_lowercase was called - impossible\n");
}

static void k_unicode(struct vc_data *vc, unsigned int value, char up_flag)
{
	if (up_flag)
		return;		/* no action, if this is a key release */

	if (diacr)
		value = handle_diacr(vc, value);

	if (dead_key_next) {
		dead_key_next = 0;
		diacr = value;
		return;
	}
	if (kbd->kbdmode == VC_UNICODE)
		to_utf8(vc, value);
	else {
		int c = conv_uni_to_8bit(value);
		if (c != -1)
			put_queue(vc, c);
	}
}

/*
 * Handle dead key. Note that we now may have several
 * dead keys modifying the same character. Very useful
 * for Vietnamese.
 */
static void k_deadunicode(struct vc_data *vc, unsigned int value, char up_flag)
{
	if (up_flag)
		return;
	diacr = (diacr ? handle_diacr(vc, value) : value);
}

static void k_self(struct vc_data *vc, unsigned char value, char up_flag)
{
	k_unicode(vc, conv_8bit_to_uni(value), up_flag);
}

static void k_dead2(struct vc_data *vc, unsigned char value, char up_flag)
{
	k_deadunicode(vc, value, up_flag);
}

/*
 * Obsolete - for backwards compatibility only
 */
static void k_dead(struct vc_data *vc, unsigned char value, char up_flag)
{
	static const unsigned char ret_diacr[NR_DEAD] = {'`', '\'', '^', '~', '"', ',' };
	value = ret_diacr[value];
	k_deadunicode(vc, value, up_flag);
}

static void k_cons(struct vc_data *vc, unsigned char value, char up_flag)
{
	if (up_flag)
		return;
	set_console(value);
}

static void k_fn(struct vc_data *vc, unsigned char value, char up_flag)
{
	unsigned v;

	if (up_flag)
		return;
	v = value;
	if (v < ARRAY_SIZE(func_table)) {
		if (func_table[value])
			puts_queue(vc, func_table[value]);
	} else
		printk(KERN_ERR "k_fn called with value=%d\n", value);
}

static void k_cur(struct vc_data *vc, unsigned char value, char up_flag)
{
	static const char cur_chars[] = "BDCA";

	if (up_flag)
		return;
	applkey(vc, cur_chars[value], vc_kbd_mode(kbd, VC_CKMODE));
}

static void k_pad(struct vc_data *vc, unsigned char value, char up_flag)
{
	static const char pad_chars[] = "0123456789+-*/\015,.?()#";
	static const char app_map[] = "pqrstuvwxylSRQMnnmPQS";

	if (up_flag)
		return;		/* no action, if this is a key release */

	/* kludge... shift forces cursor/number keys */
	if (vc_kbd_mode(kbd, VC_APPLIC) && !shift_down[KG_SHIFT]) {
		applkey(vc, app_map[value], 1);
		return;
	}

	if (!vc_kbd_led(kbd, VC_NUMLOCK))
		switch (value) {
			case KVAL(K_PCOMMA):
			case KVAL(K_PDOT):
				k_fn(vc, KVAL(K_REMOVE), 0);
				return;
			case KVAL(K_P0):
				k_fn(vc, KVAL(K_INSERT), 0);
				return;
			case KVAL(K_P1):
				k_fn(vc, KVAL(K_SELECT), 0);
				return;
			case KVAL(K_P2):
				k_cur(vc, KVAL(K_DOWN), 0);
				return;
			case KVAL(K_P3):
				k_fn(vc, KVAL(K_PGDN), 0);
				return;
			case KVAL(K_P4):
				k_cur(vc, KVAL(K_LEFT), 0);
				return;
			case KVAL(K_P6):
				k_cur(vc, KVAL(K_RIGHT), 0);
				return;
			case KVAL(K_P7):
				k_fn(vc, KVAL(K_FIND), 0);
				return;
			case KVAL(K_P8):
				k_cur(vc, KVAL(K_UP), 0);
				return;
			case KVAL(K_P9):
				k_fn(vc, KVAL(K_PGUP), 0);
				return;
			case KVAL(K_P5):
				applkey(vc, 'G', vc_kbd_mode(kbd, VC_APPLIC));
				return;
		}

	put_queue(vc, pad_chars[value]);
	if (value == KVAL(K_PENTER) && vc_kbd_mode(kbd, VC_CRLF))
		put_queue(vc, 10);
}

static void k_shift(struct vc_data *vc, unsigned char value, char up_flag)
{
	int old_state = shift_state;

	if (rep)
		return;
	/*
	 * Mimic typewriter:
	 * a CapsShift key acts like Shift but undoes CapsLock
	 */
	if (value == KVAL(K_CAPSSHIFT)) {
		value = KVAL(K_SHIFT);
		if (!up_flag)
			clr_vc_kbd_led(kbd, VC_CAPSLOCK);
	}

	if (up_flag) {
		/*
		 * handle the case that two shift or control
		 * keys are depressed simultaneously
		 */
		if (shift_down[value])
			shift_down[value]--;
	} else
		shift_down[value]++;

	if (shift_down[value])
		shift_state |= (1 << value);
	else
		shift_state &= ~(1 << value);

	/* kludge */
	if (up_flag && shift_state != old_state && npadch != -1) {
		if (kbd->kbdmode == VC_UNICODE)
			to_utf8(vc, npadch);
		else
			put_queue(vc, npadch & 0xff);
		npadch = -1;
	}
}

static void k_meta(struct vc_data *vc, unsigned char value, char up_flag)
{
	if (up_flag)
		return;

	if (vc_kbd_mode(kbd, VC_META)) {
		put_queue(vc, '\033');
		put_queue(vc, value);
	} else
		put_queue(vc, value | 0x80);
}

static void k_ascii(struct vc_data *vc, unsigned char value, char up_flag)
{
	int base;

	if (up_flag)
		return;

	if (value < 10) {
		/* decimal input of code, while Alt depressed */
		base = 10;
	} else {
		/* hexadecimal input of code, while AltGr depressed */
		value -= 10;
		base = 16;
	}

	if (npadch == -1)
		npadch = value;
	else
		npadch = npadch * base + value;
}

static void k_lock(struct vc_data *vc, unsigned char value, char up_flag)
{
	if (up_flag || rep)
		return;
	chg_vc_kbd_lock(kbd, value);
}

static void k_slock(struct vc_data *vc, unsigned char value, char up_flag)
{
	k_shift(vc, value, up_flag);
	if (up_flag || rep)
		return;
	chg_vc_kbd_slock(kbd, value);
	/* try to make Alt, oops, AltGr and such work */
	if (!key_maps[kbd->lockstate ^ kbd->slockstate]) {
		kbd->slockstate = 0;
		chg_vc_kbd_slock(kbd, value);
	}
}

/* by default, 300ms interval for combination release */
static unsigned brl_timeout = 300;
MODULE_PARM_DESC(brl_timeout, "Braille keys release delay in ms (0 for commit on first key release)");
module_param(brl_timeout, uint, 0644);

static unsigned brl_nbchords = 1;
MODULE_PARM_DESC(brl_nbchords, "Number of chords that produce a braille pattern (0 for dead chords)");
module_param(brl_nbchords, uint, 0644);

static void k_brlcommit(struct vc_data *vc, unsigned int pattern, char up_flag)
{
	static unsigned long chords;
	static unsigned committed;

	if (!brl_nbchords)
		k_deadunicode(vc, BRL_UC_ROW | pattern, up_flag);
	else {
		committed |= pattern;
		chords++;
		if (chords == brl_nbchords) {
			k_unicode(vc, BRL_UC_ROW | committed, up_flag);
			chords = 0;
			committed = 0;
		}
	}
}

static void k_brl(struct vc_data *vc, unsigned char value, char up_flag)
{
	static unsigned pressed,committing;
	static unsigned long releasestart;

	if (kbd->kbdmode != VC_UNICODE) {
		if (!up_flag)
			printk("keyboard mode must be unicode for braille patterns\n");
		return;
	}

	if (!value) {
		k_unicode(vc, BRL_UC_ROW, up_flag);
		return;
	}

	if (value > 8)
		return;

	if (up_flag) {
		if (brl_timeout) {
			if (!committing ||
			    time_after(jiffies,
				       releasestart + msecs_to_jiffies(brl_timeout))) {
				committing = pressed;
				releasestart = jiffies;
			}
			pressed &= ~(1 << (value - 1));
			if (!pressed) {
				if (committing) {
					k_brlcommit(vc, committing, 0);
					committing = 0;
				}
			}
		} else {
			if (committing) {
				k_brlcommit(vc, committing, 0);
				committing = 0;
			}
			pressed &= ~(1 << (value - 1));
		}
	} else {
		pressed |= 1 << (value - 1);
		if (!brl_timeout)
			committing = pressed;
	}
}

/*
 * The leds display either (i) the status of NumLock, CapsLock, ScrollLock,
 * or (ii) whatever pattern of lights people want to show using KDSETLED,
 * or (iii) specified bits of specified words in kernel memory.
 */
unsigned char getledstate(void)
{
	return ledstate;
}

void setledstate(struct kbd_struct *kbd, unsigned int led)
{
	if (!(led & ~7)) {
		ledioctl = led;
		kbd->ledmode = LED_SHOW_IOCTL;
	} else
		kbd->ledmode = LED_SHOW_FLAGS;
	set_leds();
}

static inline unsigned char getleds(void)
{
	struct kbd_struct *kbd = kbd_table + fg_console;
	unsigned char leds;
	int i;

	if (kbd->ledmode == LED_SHOW_IOCTL)
		return ledioctl;

	leds = kbd->ledflagstate;

	if (kbd->ledmode == LED_SHOW_MEM) {
		for (i = 0; i < 3; i++)
			if (ledptrs[i].valid) {
				if (*ledptrs[i].addr & ledptrs[i].mask)
					leds |= (1 << i);
				else
					leds &= ~(1 << i);
			}
	}
	return leds;
}

/*
 * This routine is the bottom half of the keyboard interrupt
 * routine, and runs with all interrupts enabled. It does
 * console changing, led setting and copy_to_cooked, which can
 * take a reasonably long time.
 *
 * Aside from timing (which isn't really that important for
 * keyboard interrupts as they happen often), using the software
 * interrupt routines for this thing allows us to easily mask
 * this when we don't want any of the above to happen.
 * This allows for easy and efficient race-condition prevention
 * for kbd_start => input_inject_event(dev, EV_LED, ...) => ...
 */

static void kbd_bh(unsigned long dummy)
{
	struct list_head *node;
	unsigned char leds = getleds();

	if (leds != ledstate) {
		list_for_each(node, &kbd_handler.h_list) {
			struct input_handle *handle = to_handle_h(node);
			input_inject_event(handle, EV_LED, LED_SCROLLL, !!(leds & 0x01));
			input_inject_event(handle, EV_LED, LED_NUML,    !!(leds & 0x02));
			input_inject_event(handle, EV_LED, LED_CAPSL,   !!(leds & 0x04));
			input_inject_event(handle, EV_SYN, SYN_REPORT, 0);
		}
	}

	ledstate = leds;
}

DECLARE_TASKLET_DISABLED(keyboard_tasklet, kbd_bh, 0);

#if defined(CONFIG_X86) || defined(CONFIG_IA64) || defined(CONFIG_ALPHA) ||\
    defined(CONFIG_MIPS) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) ||\
    defined(CONFIG_PARISC) || defined(CONFIG_SUPERH) ||\
    (defined(CONFIG_ARM) && defined(CONFIG_KEYBOARD_ATKBD) && !defined(CONFIG_ARCH_RPC)) ||\
    defined(CONFIG_AVR32)

#define HW_RAW(dev) (test_bit(EV_MSC, dev->evbit) && test_bit(MSC_RAW, dev->mscbit) &&\
			((dev)->id.bustype == BUS_I8042) && ((dev)->id.vendor == 0x0001) && ((dev)->id.product == 0x0001))

static const unsigned short x86_keycodes[256] =
	{ 0,  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, 84,118, 86, 87, 88,115,120,119,121,112,123, 92,
	284,285,309,  0,312, 91,327,328,329,331,333,335,336,337,338,339,
	367,288,302,304,350, 89,334,326,267,126,268,269,125,347,348,349,
	360,261,262,263,268,376,100,101,321,316,373,286,289,102,351,355,
	103,104,105,275,287,279,258,106,274,107,294,364,358,363,362,361,
	291,108,381,281,290,272,292,305,280, 99,112,257,306,359,113,114,
	264,117,271,374,379,265,266, 93, 94, 95, 85,259,375,260, 90,116,
	377,109,111,277,278,282,283,295,296,297,299,300,301,293,303,307,
	308,310,313,314,315,317,318,319,320,357,322,323,324,325,276,330,
	332,340,365,342,343,344,345,346,356,270,341,368,369,370,371,372 };

#ifdef CONFIG_SPARC
static int sparc_l1_a_state = 0;
extern void sun_do_break(void);
#endif

static int emulate_raw(struct vc_data *vc, unsigned int keycode,
		       unsigned char up_flag)
{
	int code;

	switch (keycode) {
		case KEY_PAUSE:
			put_queue(vc, 0xe1);
			put_queue(vc, 0x1d | up_flag);
			put_queue(vc, 0x45 | up_flag);
			break;

		case KEY_HANGEUL:
			if (!up_flag)
				put_queue(vc, 0xf2);
			break;

		case KEY_HANJA:
			if (!up_flag)
				put_queue(vc, 0xf1);
			break;

		case KEY_SYSRQ:
			/*
			 * Real AT keyboards (that's what we're trying
			 * to emulate here emit 0xe0 0x2a 0xe0 0x37 when
			 * pressing PrtSc/SysRq alone, but simply 0x54
			 * when pressing Alt+PrtSc/SysRq.
			 */
			if (sysrq_alt) {
				put_queue(vc, 0x54 | up_flag);
			} else {
				put_queue(vc, 0xe0);
				put_queue(vc, 0x2a | up_flag);
				put_queue(vc, 0xe0);
				put_queue(vc, 0x37 | up_flag);
			}
			break;

		default:
			if (keycode > 255)
				return -1;

			code = x86_keycodes[keycode];
			if (!code)
				return -1;

			if (code & 0x100)
				put_queue(vc, 0xe0);
			put_queue(vc, (code & 0x7f) | up_flag);

			break;
	}

	return 0;
}

#else

#define HW_RAW(dev)	0

static int emulate_raw(struct vc_data *vc, unsigned int keycode, unsigned char up_flag)
{
	if (keycode > 127)
		return -1;

	put_queue(vc, keycode | up_flag);
	return 0;
}
#endif

static void kbd_rawcode(unsigned char data)
{
	struct vc_data *vc = vc_cons[fg_console].d;
	kbd = kbd_table + fg_console;
	if (kbd->kbdmode == VC_RAW)
		put_queue(vc, data);
}

static void kbd_keycode(unsigned int keycode, int down, int hw_raw)
{
	struct vc_data *vc = vc_cons[fg_console].d;
	unsigned short keysym, *key_map;
	unsigned char type, raw_mode;
	struct tty_struct *tty;
	int shift_final;
	struct keyboard_notifier_param param = { .vc = vc, .value = keycode, .down = down };

	tty = vc->vc_tty;

	if (tty && (!tty->driver_data)) {
		/* No driver data? Strange. Okay we fix it then. */
		tty->driver_data = vc;
	}

	kbd = kbd_table + fg_console;

	if (keycode == KEY_LEFTALT || keycode == KEY_RIGHTALT)
		sysrq_alt = down ? keycode : 0;
#ifdef CONFIG_SPARC
	if (keycode == KEY_STOP)
		sparc_l1_a_state = down;
#endif

	rep = (down == 2);

#ifdef CONFIG_MAC_EMUMOUSEBTN
	if (mac_hid_mouse_emulate_buttons(1, keycode, down))
		return;
#endif /* CONFIG_MAC_EMUMOUSEBTN */

	if ((raw_mode = (kbd->kbdmode == VC_RAW)) && !hw_raw)
		if (emulate_raw(vc, keycode, !down << 7))
			if (keycode < BTN_MISC && printk_ratelimit())
				printk(KERN_WARNING "keyboard.c: can't emulate rawmode for keycode %d\n", keycode);

#ifdef CONFIG_MAGIC_SYSRQ	       /* Handle the SysRq Hack */
	if (keycode == KEY_SYSRQ && (sysrq_down || (down == 1 && sysrq_alt))) {
		if (!sysrq_down) {
			sysrq_down = down;
			sysrq_alt_use = sysrq_alt;
		}
		return;
	}
	if (sysrq_down && !down && keycode == sysrq_alt_use)
		sysrq_down = 0;
	if (sysrq_down && down && !rep) {
		handle_sysrq(kbd_sysrq_xlate[keycode], tty);
		return;
	}
#endif
#ifdef CONFIG_SPARC
	if (keycode == KEY_A && sparc_l1_a_state) {
		sparc_l1_a_state = 0;
		sun_do_break();
	}
#endif

	if (kbd->kbdmode == VC_MEDIUMRAW) {
		/*
		 * This is extended medium raw mode, with keys above 127
		 * encoded as 0, high 7 bits, low 7 bits, with the 0 bearing
		 * the 'up' flag if needed. 0 is reserved, so this shouldn't
		 * interfere with anything else. The two bytes after 0 will
		 * always have the up flag set not to interfere with older
		 * applications. This allows for 16384 different keycodes,
		 * which should be enough.
		 */
		if (keycode < 128) {
			put_queue(vc, keycode | (!down << 7));
		} else {
			put_queue(vc, !down << 7);
			put_queue(vc, (keycode >> 7) | 0x80);
			put_queue(vc, keycode | 0x80);
		}
		raw_mode = 1;
	}

	if (down)
		set_bit(keycode, key_down);
	else
		clear_bit(keycode, key_down);

	if (rep &&
	    (!vc_kbd_mode(kbd, VC_REPEAT) ||
	     (tty && !L_ECHO(tty) && tty_chars_in_buffer(tty)))) {
		/*
		 * Don't repeat a key if the input buffers are not empty and the
		 * characters get aren't echoed locally. This makes key repeat
		 * usable with slow applications and under heavy loads.
		 */
		return;
	}

	param.shift = shift_final = (shift_state | kbd->slockstate) ^ kbd->lockstate;
	param.ledstate = kbd->ledflagstate;
	key_map = key_maps[shift_final];

	if (atomic_notifier_call_chain(&keyboard_notifier_list, KBD_KEYCODE, &param) == NOTIFY_STOP || !key_map) {
		atomic_notifier_call_chain(&keyboard_notifier_list, KBD_UNBOUND_KEYCODE, &param);
		compute_shiftstate();
		kbd->slockstate = 0;
		return;
	}

	if (keycode >= NR_KEYS)
		if (keycode >= KEY_BRL_DOT1 && keycode <= KEY_BRL_DOT8)
			keysym = U(K(KT_BRL, keycode - KEY_BRL_DOT1 + 1));
		else
			return;
	else
		keysym = key_map[keycode];

	type = KTYP(keysym);

	if (type < 0xf0) {
		param.value = keysym;
		if (atomic_notifier_call_chain(&keyboard_notifier_list, KBD_UNICODE, &param) == NOTIFY_STOP)
			return;
		if (down && !raw_mode)
			to_utf8(vc, keysym);
		return;
	}

	type -= 0xf0;

	if (type == KT_LETTER) {
		type = KT_LATIN;
		if (vc_kbd_led(kbd, VC_CAPSLOCK)) {
			key_map = key_maps[shift_final ^ (1 << KG_SHIFT)];
			if (key_map)
				keysym = key_map[keycode];
		}
	}
	param.value = keysym;

	if (atomic_notifier_call_chain(&keyboard_notifier_list, KBD_KEYSYM, &param) == NOTIFY_STOP)
		return;

	if (raw_mode && type != KT_SPEC && type != KT_SHIFT)
		return;

	(*k_handler[type])(vc, keysym & 0xff, !down);

	param.ledstate = kbd->ledflagstate;
	atomic_notifier_call_chain(&keyboard_notifier_list, KBD_POST_KEYSYM, &param);

	if (type != KT_SLOCK)
		kbd->slockstate = 0;
}

static void kbd_event(struct input_handle *handle, unsigned int event_type,
		      unsigned int event_code, int value)
{
	if (event_type == EV_MSC && event_code == MSC_RAW && HW_RAW(handle->dev))
		kbd_rawcode(value);
	if (event_type == EV_KEY)
		kbd_keycode(event_code, value, HW_RAW(handle->dev));
	tasklet_schedule(&keyboard_tasklet);
	do_poke_blanked_console = 1;
	schedule_console_callback();
}

/*
 * When a keyboard (or other input device) is found, the kbd_connect
 * function is called. The function then looks at the device, and if it
 * likes it, it can open it and get events from it. In this (kbd_connect)
 * function, we should decide which VT to bind that keyboard to initially.
 */
static int kbd_connect(struct input_handler *handler, struct input_dev *dev,
			const struct input_device_id *id)
{
	struct input_handle *handle;
	int error;
	int i;

	for (i = KEY_RESERVED; i < BTN_MISC; i++)
		if (test_bit(i, dev->keybit))
			break;

	if (i == BTN_MISC && !test_bit(EV_SND, dev->evbit))
		return -ENODEV;

	handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
	if (!handle)
		return -ENOMEM;

	handle->dev = dev;
	handle->handler = handler;
	handle->name = "kbd";

	error = input_register_handle(handle);
	if (error)
		goto err_free_handle;

	error = input_open_device(handle);
	if (error)
		goto err_unregister_handle;

	return 0;

 err_unregister_handle:
	input_unregister_handle(handle);
 err_free_handle:
	kfree(handle);
	return error;
}

static void kbd_disconnect(struct input_handle *handle)
{
	input_close_device(handle);
	input_unregister_handle(handle);
	kfree(handle);
}

/*
 * Start keyboard handler on the new keyboard by refreshing LED state to
 * match the rest of the system.
 */
static void kbd_start(struct input_handle *handle)
{
	unsigned char leds = ledstate;

	tasklet_disable(&keyboard_tasklet);
	if (leds != 0xff) {
		input_inject_event(handle, EV_LED, LED_SCROLLL, !!(leds & 0x01));
		input_inject_event(handle, EV_LED, LED_NUML,    !!(leds & 0x02));
		input_inject_event(handle, EV_LED, LED_CAPSL,   !!(leds & 0x04));
		input_inject_event(handle, EV_SYN, SYN_REPORT, 0);
	}
	tasklet_enable(&keyboard_tasklet);
}

static const struct input_device_id kbd_ids[] = {
	{
                .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
                .evbit = { BIT_MASK(EV_KEY) },
        },

	{
                .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
                .evbit = { BIT_MASK(EV_SND) },
        },

	{ },    /* Terminating entry */
};

MODULE_DEVICE_TABLE(input, kbd_ids);

static struct input_handler kbd_handler = {
	.event		= kbd_event,
	.connect	= kbd_connect,
	.disconnect	= kbd_disconnect,
	.start		= kbd_start,
	.name		= "kbd",
	.id_table	= kbd_ids,
};

int __init kbd_init(void)
{
	int i;
	int error;

        for (i = 0; i < MAX_NR_CONSOLES; i++) {
		kbd_table[i].ledflagstate = KBD_DEFLEDS;
		kbd_table[i].default_ledflagstate = KBD_DEFLEDS;
		kbd_table[i].ledmode = LED_SHOW_FLAGS;
		kbd_table[i].lockstate = KBD_DEFLOCK;
		kbd_table[i].slockstate = 0;
		kbd_table[i].modeflags = KBD_DEFMODE;
		kbd_table[i].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE;
	}

	error = input_register_handler(&kbd_handler);
	if (error)
		return error;

	tasklet_enable(&keyboard_tasklet);
	tasklet_schedule(&keyboard_tasklet);

	return 0;
}