summaryrefslogtreecommitdiffstats
path: root/drivers/input/misc/winbond-cir.c
blob: 64f1de7960c699845337ad1080c9deb78598f12a (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
/*
 *  winbond-cir.c - Driver for the Consumer IR functionality of Winbond
 *                  SuperI/O chips.
 *
 *  Currently supports the Winbond WPCD376i chip (PNP id WEC1022), but
 *  could probably support others (Winbond WEC102X, NatSemi, etc)
 *  with minor modifications.
 *
 *  Original Author: David Härdeman <david@hardeman.nu>
 *     Copyright (C) 2009 David Härdeman <david@hardeman.nu>
 *
 *  Dedicated to Matilda, my newborn daughter, without whose loving attention
 *  this driver would have been finished in half the time and with a fraction
 *  of the bugs.
 *
 *  Written using:
 *    o Winbond WPCD376I datasheet helpfully provided by Jesse Barnes at Intel
 *    o NatSemi PC87338/PC97338 datasheet (for the serial port stuff)
 *    o DSDT dumps
 *
 *  Supported features:
 *    o RC6
 *    o Wake-On-CIR functionality
 *
 *  To do:
 *    o Test NEC and RC5
 *
 *  Left as an exercise for the reader:
 *    o Learning (I have neither the hardware, nor the need)
 *    o IR Transmit (ibid)
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/pnp.h>
#include <linux/interrupt.h>
#include <linux/timer.h>
#include <linux/input.h>
#include <linux/leds.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/pci_ids.h>
#include <linux/io.h>
#include <linux/bitrev.h>
#include <linux/bitops.h>
#include <linux/slab.h>

#define DRVNAME "winbond-cir"

/* CEIR Wake-Up Registers, relative to data->wbase                      */
#define WBCIR_REG_WCEIR_CTL	0x03 /* CEIR Receiver Control		*/
#define WBCIR_REG_WCEIR_STS	0x04 /* CEIR Receiver Status		*/
#define WBCIR_REG_WCEIR_EV_EN	0x05 /* CEIR Receiver Event Enable	*/
#define WBCIR_REG_WCEIR_CNTL	0x06 /* CEIR Receiver Counter Low	*/
#define WBCIR_REG_WCEIR_CNTH	0x07 /* CEIR Receiver Counter High	*/
#define WBCIR_REG_WCEIR_INDEX	0x08 /* CEIR Receiver Index		*/
#define WBCIR_REG_WCEIR_DATA	0x09 /* CEIR Receiver Data		*/
#define WBCIR_REG_WCEIR_CSL	0x0A /* CEIR Re. Compare Strlen		*/
#define WBCIR_REG_WCEIR_CFG1	0x0B /* CEIR Re. Configuration 1	*/
#define WBCIR_REG_WCEIR_CFG2	0x0C /* CEIR Re. Configuration 2	*/

/* CEIR Enhanced Functionality Registers, relative to data->ebase       */
#define WBCIR_REG_ECEIR_CTS	0x00 /* Enhanced IR Control Status	*/
#define WBCIR_REG_ECEIR_CCTL	0x01 /* Infrared Counter Control	*/
#define WBCIR_REG_ECEIR_CNT_LO	0x02 /* Infrared Counter LSB		*/
#define WBCIR_REG_ECEIR_CNT_HI	0x03 /* Infrared Counter MSB		*/
#define WBCIR_REG_ECEIR_IREM	0x04 /* Infrared Emitter Status		*/

/* SP3 Banked Registers, relative to data->sbase                        */
#define WBCIR_REG_SP3_BSR	0x03 /* Bank Select, all banks		*/
				      /* Bank 0				*/
#define WBCIR_REG_SP3_RXDATA	0x00 /* FIFO RX data (r)		*/
#define WBCIR_REG_SP3_TXDATA	0x00 /* FIFO TX data (w)		*/
#define WBCIR_REG_SP3_IER	0x01 /* Interrupt Enable		*/
#define WBCIR_REG_SP3_EIR	0x02 /* Event Identification (r)	*/
#define WBCIR_REG_SP3_FCR	0x02 /* FIFO Control (w)		*/
#define WBCIR_REG_SP3_MCR	0x04 /* Mode Control			*/
#define WBCIR_REG_SP3_LSR	0x05 /* Link Status			*/
#define WBCIR_REG_SP3_MSR	0x06 /* Modem Status			*/
#define WBCIR_REG_SP3_ASCR	0x07 /* Aux Status and Control		*/
				      /* Bank 2				*/
#define WBCIR_REG_SP3_BGDL	0x00 /* Baud Divisor LSB		*/
#define WBCIR_REG_SP3_BGDH	0x01 /* Baud Divisor MSB		*/
#define WBCIR_REG_SP3_EXCR1	0x02 /* Extended Control 1		*/
#define WBCIR_REG_SP3_EXCR2	0x04 /* Extended Control 2		*/
#define WBCIR_REG_SP3_TXFLV	0x06 /* TX FIFO Level			*/
#define WBCIR_REG_SP3_RXFLV	0x07 /* RX FIFO Level			*/
				      /* Bank 3				*/
#define WBCIR_REG_SP3_MRID	0x00 /* Module Identification		*/
#define WBCIR_REG_SP3_SH_LCR	0x01 /* LCR Shadow			*/
#define WBCIR_REG_SP3_SH_FCR	0x02 /* FCR Shadow			*/
				      /* Bank 4				*/
#define WBCIR_REG_SP3_IRCR1	0x02 /* Infrared Control 1		*/
				      /* Bank 5				*/
#define WBCIR_REG_SP3_IRCR2	0x04 /* Infrared Control 2		*/
				      /* Bank 6				*/
#define WBCIR_REG_SP3_IRCR3	0x00 /* Infrared Control 3		*/
#define WBCIR_REG_SP3_SIR_PW	0x02 /* SIR Pulse Width		*/
				      /* Bank 7				*/
#define WBCIR_REG_SP3_IRRXDC	0x00 /* IR RX Demod Control		*/
#define WBCIR_REG_SP3_IRTXMC	0x01 /* IR TX Mod Control		*/
#define WBCIR_REG_SP3_RCCFG	0x02 /* CEIR Config			*/
#define WBCIR_REG_SP3_IRCFG1	0x04 /* Infrared Config 1		*/
#define WBCIR_REG_SP3_IRCFG4	0x07 /* Infrared Config 4		*/

/*
 * Magic values follow
 */

/* No interrupts for WBCIR_REG_SP3_IER and WBCIR_REG_SP3_EIR */
#define WBCIR_IRQ_NONE		0x00
/* RX data bit for WBCIR_REG_SP3_IER and WBCIR_REG_SP3_EIR */
#define WBCIR_IRQ_RX		0x01
/* Over/Under-flow bit for WBCIR_REG_SP3_IER and WBCIR_REG_SP3_EIR */
#define WBCIR_IRQ_ERR		0x04
/* Led enable/disable bit for WBCIR_REG_ECEIR_CTS */
#define WBCIR_LED_ENABLE	0x80
/* RX data available bit for WBCIR_REG_SP3_LSR */
#define WBCIR_RX_AVAIL		0x01
/* RX disable bit for WBCIR_REG_SP3_ASCR */
#define WBCIR_RX_DISABLE	0x20
/* Extended mode enable bit for WBCIR_REG_SP3_EXCR1 */
#define WBCIR_EXT_ENABLE	0x01
/* Select compare register in WBCIR_REG_WCEIR_INDEX (bits 5 & 6) */
#define WBCIR_REGSEL_COMPARE	0x10
/* Select mask register in WBCIR_REG_WCEIR_INDEX (bits 5 & 6) */
#define WBCIR_REGSEL_MASK	0x20
/* Starting address of selected register in WBCIR_REG_WCEIR_INDEX */
#define WBCIR_REG_ADDR0		0x00

/* Valid banks for the SP3 UART */
enum wbcir_bank {
	WBCIR_BANK_0          = 0x00,
	WBCIR_BANK_1          = 0x80,
	WBCIR_BANK_2          = 0xE0,
	WBCIR_BANK_3          = 0xE4,
	WBCIR_BANK_4          = 0xE8,
	WBCIR_BANK_5          = 0xEC,
	WBCIR_BANK_6          = 0xF0,
	WBCIR_BANK_7          = 0xF4,
};

/* Supported IR Protocols */
enum wbcir_protocol {
	IR_PROTOCOL_RC5          = 0x0,
	IR_PROTOCOL_NEC          = 0x1,
	IR_PROTOCOL_RC6          = 0x2,
};

/* Misc */
#define WBCIR_NAME	"Winbond CIR"
#define WBCIR_ID_FAMILY          0xF1 /* Family ID for the WPCD376I	*/
#define	WBCIR_ID_CHIP            0x04 /* Chip ID for the WPCD376I	*/
#define IR_KEYPRESS_TIMEOUT       250 /* FIXME: should be per-protocol? */
#define INVALID_SCANCODE   0x7FFFFFFF /* Invalid with all protos	*/
#define WAKEUP_IOMEM_LEN         0x10 /* Wake-Up I/O Reg Len		*/
#define EHFUNC_IOMEM_LEN         0x10 /* Enhanced Func I/O Reg Len	*/
#define SP_IOMEM_LEN             0x08 /* Serial Port 3 (IR) Reg Len	*/
#define WBCIR_MAX_IDLE_BYTES       10

static DEFINE_SPINLOCK(wbcir_lock);
static DEFINE_RWLOCK(keytable_lock);

struct wbcir_key {
	u32 scancode;
	unsigned int keycode;
};

struct wbcir_keyentry {
	struct wbcir_key key;
	struct list_head list;
};

static struct wbcir_key rc6_def_keymap[] = {
	{ 0x800F0400, KEY_NUMERIC_0		},
	{ 0x800F0401, KEY_NUMERIC_1		},
	{ 0x800F0402, KEY_NUMERIC_2		},
	{ 0x800F0403, KEY_NUMERIC_3		},
	{ 0x800F0404, KEY_NUMERIC_4		},
	{ 0x800F0405, KEY_NUMERIC_5		},
	{ 0x800F0406, KEY_NUMERIC_6		},
	{ 0x800F0407, KEY_NUMERIC_7		},
	{ 0x800F0408, KEY_NUMERIC_8		},
	{ 0x800F0409, KEY_NUMERIC_9		},
	{ 0x800F041D, KEY_NUMERIC_STAR		},
	{ 0x800F041C, KEY_NUMERIC_POUND		},
	{ 0x800F0410, KEY_VOLUMEUP		},
	{ 0x800F0411, KEY_VOLUMEDOWN		},
	{ 0x800F0412, KEY_CHANNELUP		},
	{ 0x800F0413, KEY_CHANNELDOWN		},
	{ 0x800F040E, KEY_MUTE			},
	{ 0x800F040D, KEY_VENDOR		}, /* Vista Logo Key */
	{ 0x800F041E, KEY_UP			},
	{ 0x800F041F, KEY_DOWN			},
	{ 0x800F0420, KEY_LEFT			},
	{ 0x800F0421, KEY_RIGHT			},
	{ 0x800F0422, KEY_OK			},
	{ 0x800F0423, KEY_ESC			},
	{ 0x800F040F, KEY_INFO			},
	{ 0x800F040A, KEY_CLEAR			},
	{ 0x800F040B, KEY_ENTER			},
	{ 0x800F045B, KEY_RED			},
	{ 0x800F045C, KEY_GREEN			},
	{ 0x800F045D, KEY_YELLOW		},
	{ 0x800F045E, KEY_BLUE			},
	{ 0x800F045A, KEY_TEXT			},
	{ 0x800F0427, KEY_SWITCHVIDEOMODE	},
	{ 0x800F040C, KEY_POWER			},
	{ 0x800F0450, KEY_RADIO			},
	{ 0x800F0448, KEY_PVR			},
	{ 0x800F0447, KEY_AUDIO			},
	{ 0x800F0426, KEY_EPG			},
	{ 0x800F0449, KEY_CAMERA		},
	{ 0x800F0425, KEY_TV			},
	{ 0x800F044A, KEY_VIDEO			},
	{ 0x800F0424, KEY_DVD			},
	{ 0x800F0416, KEY_PLAY			},
	{ 0x800F0418, KEY_PAUSE			},
	{ 0x800F0419, KEY_STOP			},
	{ 0x800F0414, KEY_FASTFORWARD		},
	{ 0x800F041A, KEY_NEXT			},
	{ 0x800F041B, KEY_PREVIOUS		},
	{ 0x800F0415, KEY_REWIND		},
	{ 0x800F0417, KEY_RECORD		},
};

/* Registers and other state is protected by wbcir_lock */
struct wbcir_data {
	unsigned long wbase;        /* Wake-Up Baseaddr		*/
	unsigned long ebase;        /* Enhanced Func. Baseaddr	*/
	unsigned long sbase;        /* Serial Port Baseaddr	*/
	unsigned int  irq;          /* Serial Port IRQ		*/

	struct input_dev *input_dev;
	struct timer_list timer_keyup;
	struct led_trigger *rxtrigger;
	struct led_trigger *txtrigger;
	struct led_classdev led;

	u32 last_scancode;
	unsigned int last_keycode;
	u8 last_toggle;
	u8 keypressed;
	unsigned long keyup_jiffies;
	unsigned int idle_count;

	/* RX irdata and parsing state */
	unsigned long irdata[30];
	unsigned int irdata_count;
	unsigned int irdata_idle;
	unsigned int irdata_off;
	unsigned int irdata_error;

	/* Protected by keytable_lock */
	struct list_head keytable;
};

static enum wbcir_protocol protocol = IR_PROTOCOL_RC6;
module_param(protocol, uint, 0444);
MODULE_PARM_DESC(protocol, "IR protocol to use "
		 "(0 = RC5, 1 = NEC, 2 = RC6A, default)");

static int invert; /* default = 0 */
module_param(invert, bool, 0444);
MODULE_PARM_DESC(invert, "Invert the signal from the IR receiver");

static unsigned int wake_sc = 0x800F040C;
module_param(wake_sc, uint, 0644);
MODULE_PARM_DESC(wake_sc, "Scancode of the power-on IR command");

static unsigned int wake_rc6mode = 6;
module_param(wake_rc6mode, uint, 0644);
MODULE_PARM_DESC(wake_rc6mode, "RC6 mode for the power-on command "
		 "(0 = 0, 6 = 6A, default)");



/*****************************************************************************
 *
 * UTILITY FUNCTIONS
 *
 *****************************************************************************/

/* Caller needs to hold wbcir_lock */
static void
wbcir_set_bits(unsigned long addr, u8 bits, u8 mask)
{
	u8 val;

	val = inb(addr);
	val = ((val & ~mask) | (bits & mask));
	outb(val, addr);
}

/* Selects the register bank for the serial port */
static inline void
wbcir_select_bank(struct wbcir_data *data, enum wbcir_bank bank)
{
	outb(bank, data->sbase + WBCIR_REG_SP3_BSR);
}

static enum led_brightness
wbcir_led_brightness_get(struct led_classdev *led_cdev)
{
	struct wbcir_data *data = container_of(led_cdev,
					       struct wbcir_data,
					       led);

	if (inb(data->ebase + WBCIR_REG_ECEIR_CTS) & WBCIR_LED_ENABLE)
		return LED_FULL;
	else
		return LED_OFF;
}

static void
wbcir_led_brightness_set(struct led_classdev *led_cdev,
			    enum led_brightness brightness)
{
	struct wbcir_data *data = container_of(led_cdev,
					       struct wbcir_data,
					       led);

	wbcir_set_bits(data->ebase + WBCIR_REG_ECEIR_CTS,
		       brightness == LED_OFF ? 0x00 : WBCIR_LED_ENABLE,
		       WBCIR_LED_ENABLE);
}

/* Manchester encodes bits to RC6 message cells (see wbcir_parse_rc6) */
static u8
wbcir_to_rc6cells(u8 val)
{
	u8 coded = 0x00;
	int i;

	val &= 0x0F;
	for (i = 0; i < 4; i++) {
		if (val & 0x01)
			coded |= 0x02 << (i * 2);
		else
			coded |= 0x01 << (i * 2);
		val >>= 1;
	}

	return coded;
}



/*****************************************************************************
 *
 * INPUT FUNCTIONS
 *
 *****************************************************************************/

static unsigned int
wbcir_do_getkeycode(struct wbcir_data *data, u32 scancode)
{
	struct wbcir_keyentry *keyentry;
	unsigned int keycode = KEY_RESERVED;
	unsigned long flags;

	read_lock_irqsave(&keytable_lock, flags);

	list_for_each_entry(keyentry, &data->keytable, list) {
		if (keyentry->key.scancode == scancode) {
			keycode = keyentry->key.keycode;
			break;
		}
	}

	read_unlock_irqrestore(&keytable_lock, flags);
	return keycode;
}

static int
wbcir_getkeycode(struct input_dev *dev,
		 unsigned int scancode, unsigned int *keycode)
{
	struct wbcir_data *data = input_get_drvdata(dev);

	*keycode = wbcir_do_getkeycode(data, scancode);
	return 0;
}

static int
wbcir_setkeycode(struct input_dev *dev,
		 unsigned int scancode, unsigned int keycode)
{
	struct wbcir_data *data = input_get_drvdata(dev);
	struct wbcir_keyentry *keyentry;
	struct wbcir_keyentry *new_keyentry;
	unsigned long flags;
	unsigned int old_keycode = KEY_RESERVED;

	new_keyentry = kmalloc(sizeof(*new_keyentry), GFP_KERNEL);
	if (!new_keyentry)
		return -ENOMEM;

	write_lock_irqsave(&keytable_lock, flags);

	list_for_each_entry(keyentry, &data->keytable, list) {
		if (keyentry->key.scancode != scancode)
			continue;

		old_keycode = keyentry->key.keycode;
		keyentry->key.keycode = keycode;

		if (keyentry->key.keycode == KEY_RESERVED) {
			list_del(&keyentry->list);
			kfree(keyentry);
		}

		break;
	}

	set_bit(keycode, dev->keybit);

	if (old_keycode == KEY_RESERVED) {
		new_keyentry->key.scancode = scancode;
		new_keyentry->key.keycode = keycode;
		list_add(&new_keyentry->list, &data->keytable);
	} else {
		kfree(new_keyentry);
		clear_bit(old_keycode, dev->keybit);
		list_for_each_entry(keyentry, &data->keytable, list) {
			if (keyentry->key.keycode == old_keycode) {
				set_bit(old_keycode, dev->keybit);
				break;
			}
		}
	}

	write_unlock_irqrestore(&keytable_lock, flags);
	return 0;
}

/*
 * Timer function to report keyup event some time after keydown is
 * reported by the ISR.
 */
static void
wbcir_keyup(unsigned long cookie)
{
	struct wbcir_data *data = (struct wbcir_data *)cookie;
	unsigned long flags;

	/*
	 * data->keyup_jiffies is used to prevent a race condition if a
	 * hardware interrupt occurs at this point and the keyup timer
	 * event is moved further into the future as a result.
	 *
	 * The timer will then be reactivated and this function called
	 * again in the future. We need to exit gracefully in that case
	 * to allow the input subsystem to do its auto-repeat magic or
	 * a keyup event might follow immediately after the keydown.
	 */

	spin_lock_irqsave(&wbcir_lock, flags);

	if (time_is_after_eq_jiffies(data->keyup_jiffies) && data->keypressed) {
		data->keypressed = 0;
		led_trigger_event(data->rxtrigger, LED_OFF);
		input_report_key(data->input_dev, data->last_keycode, 0);
		input_sync(data->input_dev);
	}

	spin_unlock_irqrestore(&wbcir_lock, flags);
}

static void
wbcir_keydown(struct wbcir_data *data, u32 scancode, u8 toggle)
{
	unsigned int keycode;

	/* Repeat? */
	if (data->last_scancode == scancode &&
	    data->last_toggle == toggle &&
	    data->keypressed)
		goto set_timer;
	data->last_scancode = scancode;

	/* Do we need to release an old keypress? */
	if (data->keypressed) {
		input_report_key(data->input_dev, data->last_keycode, 0);
		input_sync(data->input_dev);
		data->keypressed = 0;
	}

	/* Report scancode */
	input_event(data->input_dev, EV_MSC, MSC_SCAN, (int)scancode);

	/* Do we know this scancode? */
	keycode = wbcir_do_getkeycode(data, scancode);
	if (keycode == KEY_RESERVED)
		goto set_timer;

	/* Register a keypress */
	input_report_key(data->input_dev, keycode, 1);
	data->keypressed = 1;
	data->last_keycode = keycode;
	data->last_toggle = toggle;

set_timer:
	input_sync(data->input_dev);
	led_trigger_event(data->rxtrigger,
			  data->keypressed ? LED_FULL : LED_OFF);
	data->keyup_jiffies = jiffies + msecs_to_jiffies(IR_KEYPRESS_TIMEOUT);
	mod_timer(&data->timer_keyup, data->keyup_jiffies);
}



/*****************************************************************************
 *
 * IR PARSING FUNCTIONS
 *
 *****************************************************************************/

/* Resets all irdata */
static void
wbcir_reset_irdata(struct wbcir_data *data)
{
	memset(data->irdata, 0, sizeof(data->irdata));
	data->irdata_count = 0;
	data->irdata_off = 0;
	data->irdata_error = 0;
	data->idle_count = 0;
}

/* Adds one bit of irdata */
static void
add_irdata_bit(struct wbcir_data *data, int set)
{
	if (data->irdata_count >= sizeof(data->irdata) * 8) {
		data->irdata_error = 1;
		return;
	}

	if (set)
		__set_bit(data->irdata_count, data->irdata);
	data->irdata_count++;
}

/* Gets count bits of irdata */
static u16
get_bits(struct wbcir_data *data, int count)
{
	u16 val = 0x0;

	if (data->irdata_count - data->irdata_off < count) {
		data->irdata_error = 1;
		return 0x0;
	}

	while (count > 0) {
		val <<= 1;
		if (test_bit(data->irdata_off, data->irdata))
			val |= 0x1;
		count--;
		data->irdata_off++;
	}

	return val;
}

/* Reads 16 cells and converts them to a byte */
static u8
wbcir_rc6cells_to_byte(struct wbcir_data *data)
{
	u16 raw = get_bits(data, 16);
	u8 val = 0x00;
	int bit;

	for (bit = 0; bit < 8; bit++) {
		switch (raw & 0x03) {
		case 0x01:
			break;
		case 0x02:
			val |= (0x01 << bit);
			break;
		default:
			data->irdata_error = 1;
			break;
		}
		raw >>= 2;
	}

	return val;
}

/* Decodes a number of bits from raw RC5 data */
static u8
wbcir_get_rc5bits(struct wbcir_data *data, unsigned int count)
{
	u16 raw = get_bits(data, count * 2);
	u8 val = 0x00;
	int bit;

	for (bit = 0; bit < count; bit++) {
		switch (raw & 0x03) {
		case 0x01:
			val |= (0x01 << bit);
			break;
		case 0x02:
			break;
		default:
			data->irdata_error = 1;
			break;
		}
		raw >>= 2;
	}

	return val;
}

static void
wbcir_parse_rc6(struct device *dev, struct wbcir_data *data)
{
	/*
	 * Normal bits are manchester coded as follows:
	 * cell0 + cell1 = logic "0"
	 * cell1 + cell0 = logic "1"
	 *
	 * The IR pulse has the following components:
	 *
	 * Leader		- 6 * cell1 - discarded
	 * Gap    		- 2 * cell0 - discarded
	 * Start bit		- Normal Coding - always "1"
	 * Mode Bit 2 - 0	- Normal Coding
	 * Toggle bit		- Normal Coding with double bit time,
	 *			  e.g. cell0 + cell0 + cell1 + cell1
	 *			  means logic "0".
	 *
	 * The rest depends on the mode, the following modes are known:
	 *
	 * MODE 0:
	 *  Address Bit 7 - 0	- Normal Coding
	 *  Command Bit 7 - 0	- Normal Coding
	 *
	 * MODE 6:
	 *  The above Toggle Bit is used as a submode bit, 0 = A, 1 = B.
	 *  Submode B is for pointing devices, only remotes using submode A
	 *  are supported.
	 *
	 *  Customer range bit	- 0 => Customer = 7 bits, 0...127
	 *                        1 => Customer = 15 bits, 32768...65535
	 *  Customer Bits	- Normal Coding
	 *
	 *  Customer codes are allocated by Philips. The rest of the bits
	 *  are customer dependent. The following is commonly used (and the
	 *  only supported config):
	 *
	 *  Toggle Bit		- Normal Coding
	 *  Address Bit 6 - 0	- Normal Coding
	 *  Command Bit 7 - 0	- Normal Coding
	 *
	 * All modes are followed by at least 6 * cell0.
	 *
	 * MODE 0 msglen:
	 *  1 * 2 (start bit) + 3 * 2 (mode) + 2 * 2 (toggle) +
	 *  8 * 2 (address) + 8 * 2 (command) =
	 *  44 cells
	 *
	 * MODE 6A msglen:
	 *  1 * 2 (start bit) + 3 * 2 (mode) + 2 * 2 (submode) +
	 *  1 * 2 (customer range bit) + 7/15 * 2 (customer bits) +
	 *  1 * 2 (toggle bit) + 7 * 2 (address) + 8 * 2 (command) =
	 *  60 - 76 cells
	 */
	u8 mode;
	u8 toggle;
	u16 customer = 0x0;
	u8 address;
	u8 command;
	u32 scancode;

	/* Leader mark */
	while (get_bits(data, 1) && !data->irdata_error)
		/* Do nothing */;

	/* Leader space */
	if (get_bits(data, 1)) {
		dev_dbg(dev, "RC6 - Invalid leader space\n");
		return;
	}

	/* Start bit */
	if (get_bits(data, 2) != 0x02) {
		dev_dbg(dev, "RC6 - Invalid start bit\n");
		return;
	}

	/* Mode */
	mode = get_bits(data, 6);
	switch (mode) {
	case 0x15: /* 010101 = b000 */
		mode = 0;
		break;
	case 0x29: /* 101001 = b110 */
		mode = 6;
		break;
	default:
		dev_dbg(dev, "RC6 - Invalid mode\n");
		return;
	}

	/* Toggle bit / Submode bit */
	toggle = get_bits(data, 4);
	switch (toggle) {
	case 0x03:
		toggle = 0;
		break;
	case 0x0C:
		toggle = 1;
		break;
	default:
		dev_dbg(dev, "RC6 - Toggle bit error\n");
		break;
	}

	/* Customer */
	if (mode == 6) {
		if (toggle != 0) {
			dev_dbg(dev, "RC6B - Not Supported\n");
			return;
		}

		customer = wbcir_rc6cells_to_byte(data);

		if (customer & 0x80) {
			/* 15 bit customer value */
			customer <<= 8;
			customer |= wbcir_rc6cells_to_byte(data);
		}
	}

	/* Address */
	address = wbcir_rc6cells_to_byte(data);
	if (mode == 6) {
		toggle = address >> 7;
		address &= 0x7F;
	}

	/* Command */
	command = wbcir_rc6cells_to_byte(data);

	/* Create scancode */
	scancode =  command;
	scancode |= address << 8;
	scancode |= customer << 16;

	/* Last sanity check */
	if (data->irdata_error) {
		dev_dbg(dev, "RC6 - Cell error(s)\n");
		return;
	}

	dev_dbg(dev, "IR-RC6 ad 0x%02X cm 0x%02X cu 0x%04X "
		"toggle %u mode %u scan 0x%08X\n",
		address,
		command,
		customer,
		(unsigned int)toggle,
		(unsigned int)mode,
		scancode);

	wbcir_keydown(data, scancode, toggle);
}

static void
wbcir_parse_rc5(struct device *dev, struct wbcir_data *data)
{
	/*
	 * Bits are manchester coded as follows:
	 * cell1 + cell0 = logic "0"
	 * cell0 + cell1 = logic "1"
	 * (i.e. the reverse of RC6)
	 *
	 * Start bit 1		- "1" - discarded
	 * Start bit 2		- Must be inverted to get command bit 6
	 * Toggle bit
	 * Address Bit 4 - 0
	 * Command Bit 5 - 0
	 */
	u8 toggle;
	u8 address;
	u8 command;
	u32 scancode;

	/* Start bit 1 */
	if (!get_bits(data, 1)) {
		dev_dbg(dev, "RC5 - Invalid start bit\n");
		return;
	}

	/* Start bit 2 */
	if (!wbcir_get_rc5bits(data, 1))
		command = 0x40;
	else
		command = 0x00;

	toggle   = wbcir_get_rc5bits(data, 1);
	address  = wbcir_get_rc5bits(data, 5);
	command |= wbcir_get_rc5bits(data, 6);
	scancode = address << 7 | command;

	/* Last sanity check */
	if (data->irdata_error) {
		dev_dbg(dev, "RC5 - Invalid message\n");
		return;
	}

	dev_dbg(dev, "IR-RC5 ad %u cm %u t %u s %u\n",
		(unsigned int)address,
		(unsigned int)command,
		(unsigned int)toggle,
		(unsigned int)scancode);

	wbcir_keydown(data, scancode, toggle);
}

static void
wbcir_parse_nec(struct device *dev, struct wbcir_data *data)
{
	/*
	 * Each bit represents 560 us.
	 *
	 * Leader		- 9 ms burst
	 * Gap			- 4.5 ms silence
	 * Address1 bit 0 - 7	- Address 1
	 * Address2 bit 0 - 7	- Address 2
	 * Command1 bit 0 - 7	- Command 1
	 * Command2 bit 0 - 7	- Command 2
	 *
	 * Note the bit order!
	 *
	 * With the old NEC protocol, Address2 was the inverse of Address1
	 * and Command2 was the inverse of Command1 and were used as
	 * an error check.
	 *
	 * With NEC extended, Address1 is the LSB of the Address and
	 * Address2 is the MSB, Command parsing remains unchanged.
	 *
	 * A repeat message is coded as:
	 * Leader		- 9 ms burst
	 * Gap			- 2.25 ms silence
	 * Repeat		- 560 us active
	 */
	u8 address1;
	u8 address2;
	u8 command1;
	u8 command2;
	u16 address;
	u32 scancode;

	/* Leader mark */
	while (get_bits(data, 1) && !data->irdata_error)
		/* Do nothing */;

	/* Leader space */
	if (get_bits(data, 4)) {
		dev_dbg(dev, "NEC - Invalid leader space\n");
		return;
	}

	/* Repeat? */
	if (get_bits(data, 1)) {
		if (!data->keypressed) {
			dev_dbg(dev, "NEC - Stray repeat message\n");
			return;
		}

		dev_dbg(dev, "IR-NEC repeat s %u\n",
			(unsigned int)data->last_scancode);

		wbcir_keydown(data, data->last_scancode, data->last_toggle);
		return;
	}

	/* Remaining leader space */
	if (get_bits(data, 3)) {
		dev_dbg(dev, "NEC - Invalid leader space\n");
		return;
	}

	address1  = bitrev8(get_bits(data, 8));
	address2  = bitrev8(get_bits(data, 8));
	command1  = bitrev8(get_bits(data, 8));
	command2  = bitrev8(get_bits(data, 8));

	/* Sanity check */
	if (data->irdata_error) {
		dev_dbg(dev, "NEC - Invalid message\n");
		return;
	}

	/* Check command validity */
	if (command1 != ~command2) {
		dev_dbg(dev, "NEC - Command bytes mismatch\n");
		return;
	}

	/* Check for extended NEC protocol */
	address = address1;
	if (address1 != ~address2)
		address |= address2 << 8;

	scancode = address << 8 | command1;

	dev_dbg(dev, "IR-NEC ad %u cm %u s %u\n",
		(unsigned int)address,
		(unsigned int)command1,
		(unsigned int)scancode);

	wbcir_keydown(data, scancode, !data->last_toggle);
}



/*****************************************************************************
 *
 * INTERRUPT FUNCTIONS
 *
 *****************************************************************************/

static irqreturn_t
wbcir_irq_handler(int irqno, void *cookie)
{
	struct pnp_dev *device = cookie;
	struct wbcir_data *data = pnp_get_drvdata(device);
	struct device *dev = &device->dev;
	u8 status;
	unsigned long flags;
	u8 irdata[8];
	int i;
	unsigned int hw;

	spin_lock_irqsave(&wbcir_lock, flags);

	wbcir_select_bank(data, WBCIR_BANK_0);

	status = inb(data->sbase + WBCIR_REG_SP3_EIR);

	if (!(status & (WBCIR_IRQ_RX | WBCIR_IRQ_ERR))) {
		spin_unlock_irqrestore(&wbcir_lock, flags);
		return IRQ_NONE;
	}

	if (status & WBCIR_IRQ_ERR)
		data->irdata_error = 1;

	if (!(status & WBCIR_IRQ_RX))
		goto out;

	/* Since RXHDLEV is set, at least 8 bytes are in the FIFO */
	insb(data->sbase + WBCIR_REG_SP3_RXDATA, &irdata[0], 8);

	for (i = 0; i < sizeof(irdata); i++) {
		hw = hweight8(irdata[i]);
		if (hw > 4)
			add_irdata_bit(data, 0);
		else
			add_irdata_bit(data, 1);

		if (hw == 8)
			data->idle_count++;
		else
			data->idle_count = 0;
	}

	if (data->idle_count > WBCIR_MAX_IDLE_BYTES) {
		/* Set RXINACTIVE... */
		outb(WBCIR_RX_DISABLE, data->sbase + WBCIR_REG_SP3_ASCR);

		/* ...and drain the FIFO */
		while (inb(data->sbase + WBCIR_REG_SP3_LSR) & WBCIR_RX_AVAIL)
			inb(data->sbase + WBCIR_REG_SP3_RXDATA);

		dev_dbg(dev, "IRDATA:\n");
		for (i = 0; i < data->irdata_count; i += BITS_PER_LONG)
			dev_dbg(dev, "0x%08lX\n", data->irdata[i/BITS_PER_LONG]);

		switch (protocol) {
		case IR_PROTOCOL_RC5:
			wbcir_parse_rc5(dev, data);
			break;
		case IR_PROTOCOL_RC6:
			wbcir_parse_rc6(dev, data);
			break;
		case IR_PROTOCOL_NEC:
			wbcir_parse_nec(dev, data);
			break;
		}

		wbcir_reset_irdata(data);
	}

out:
	spin_unlock_irqrestore(&wbcir_lock, flags);
	return IRQ_HANDLED;
}



/*****************************************************************************
 *
 * SETUP/INIT/SUSPEND/RESUME FUNCTIONS
 *
 *****************************************************************************/

static void
wbcir_shutdown(struct pnp_dev *device)
{
	struct device *dev = &device->dev;
	struct wbcir_data *data = pnp_get_drvdata(device);
	int do_wake = 1;
	u8 match[11];
	u8 mask[11];
	u8 rc6_csl = 0;
	int i;

	memset(match, 0, sizeof(match));
	memset(mask, 0, sizeof(mask));

	if (wake_sc == INVALID_SCANCODE || !device_may_wakeup(dev)) {
		do_wake = 0;
		goto finish;
	}

	switch (protocol) {
	case IR_PROTOCOL_RC5:
		if (wake_sc > 0xFFF) {
			do_wake = 0;
			dev_err(dev, "RC5 - Invalid wake scancode\n");
			break;
		}

		/* Mask = 13 bits, ex toggle */
		mask[0] = 0xFF;
		mask[1] = 0x17;

		match[0]  = (wake_sc & 0x003F);      /* 6 command bits */
		match[0] |= (wake_sc & 0x0180) >> 1; /* 2 address bits */
		match[1]  = (wake_sc & 0x0E00) >> 9; /* 3 address bits */
		if (!(wake_sc & 0x0040))             /* 2nd start bit  */
			match[1] |= 0x10;

		break;

	case IR_PROTOCOL_NEC:
		if (wake_sc > 0xFFFFFF) {
			do_wake = 0;
			dev_err(dev, "NEC - Invalid wake scancode\n");
			break;
		}

		mask[0] = mask[1] = mask[2] = mask[3] = 0xFF;

		match[1] = bitrev8((wake_sc & 0xFF));
		match[0] = ~match[1];

		match[3] = bitrev8((wake_sc & 0xFF00) >> 8);
		if (wake_sc > 0xFFFF)
			match[2] = bitrev8((wake_sc & 0xFF0000) >> 16);
		else
			match[2] = ~match[3];

		break;

	case IR_PROTOCOL_RC6:

		if (wake_rc6mode == 0) {
			if (wake_sc > 0xFFFF) {
				do_wake = 0;
				dev_err(dev, "RC6 - Invalid wake scancode\n");
				break;
			}

			/* Command */
			match[0] = wbcir_to_rc6cells(wake_sc >>  0);
			mask[0]  = 0xFF;
			match[1] = wbcir_to_rc6cells(wake_sc >>  4);
			mask[1]  = 0xFF;

			/* Address */
			match[2] = wbcir_to_rc6cells(wake_sc >>  8);
			mask[2]  = 0xFF;
			match[3] = wbcir_to_rc6cells(wake_sc >> 12);
			mask[3]  = 0xFF;

			/* Header */
			match[4] = 0x50; /* mode1 = mode0 = 0, ignore toggle */
			mask[4]  = 0xF0;
			match[5] = 0x09; /* start bit = 1, mode2 = 0 */
			mask[5]  = 0x0F;

			rc6_csl = 44;

		} else if (wake_rc6mode == 6) {
			i = 0;

			/* Command */
			match[i]  = wbcir_to_rc6cells(wake_sc >>  0);
			mask[i++] = 0xFF;
			match[i]  = wbcir_to_rc6cells(wake_sc >>  4);
			mask[i++] = 0xFF;

			/* Address + Toggle */
			match[i]  = wbcir_to_rc6cells(wake_sc >>  8);
			mask[i++] = 0xFF;
			match[i]  = wbcir_to_rc6cells(wake_sc >> 12);
			mask[i++] = 0x3F;

			/* Customer bits 7 - 0 */
			match[i]  = wbcir_to_rc6cells(wake_sc >> 16);
			mask[i++] = 0xFF;
			match[i]  = wbcir_to_rc6cells(wake_sc >> 20);
			mask[i++] = 0xFF;

			if (wake_sc & 0x80000000) {
				/* Customer range bit and bits 15 - 8 */
				match[i]  = wbcir_to_rc6cells(wake_sc >> 24);
				mask[i++] = 0xFF;
				match[i]  = wbcir_to_rc6cells(wake_sc >> 28);
				mask[i++] = 0xFF;
				rc6_csl = 76;
			} else if (wake_sc <= 0x007FFFFF) {
				rc6_csl = 60;
			} else {
				do_wake = 0;
				dev_err(dev, "RC6 - Invalid wake scancode\n");
				break;
			}

			/* Header */
			match[i]  = 0x93; /* mode1 = mode0 = 1, submode = 0 */
			mask[i++] = 0xFF;
			match[i]  = 0x0A; /* start bit = 1, mode2 = 1 */
			mask[i++] = 0x0F;

		} else {
			do_wake = 0;
			dev_err(dev, "RC6 - Invalid wake mode\n");
		}

		break;

	default:
		do_wake = 0;
		break;
	}

finish:
	if (do_wake) {
		/* Set compare and compare mask */
		wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_INDEX,
			       WBCIR_REGSEL_COMPARE | WBCIR_REG_ADDR0,
			       0x3F);
		outsb(data->wbase + WBCIR_REG_WCEIR_DATA, match, 11);
		wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_INDEX,
			       WBCIR_REGSEL_MASK | WBCIR_REG_ADDR0,
			       0x3F);
		outsb(data->wbase + WBCIR_REG_WCEIR_DATA, mask, 11);

		/* RC6 Compare String Len */
		outb(rc6_csl, data->wbase + WBCIR_REG_WCEIR_CSL);

		/* Clear status bits NEC_REP, BUFF, MSG_END, MATCH */
		wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_STS, 0x17, 0x17);

		/* Clear BUFF_EN, Clear END_EN, Set MATCH_EN */
		wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x01, 0x07);

		/* Set CEIR_EN */
		wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CTL, 0x01, 0x01);

	} else {
		/* Clear BUFF_EN, Clear END_EN, Clear MATCH_EN */
		wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x00, 0x07);

		/* Clear CEIR_EN */
		wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CTL, 0x00, 0x01);
	}

	/* Disable interrupts */
	wbcir_select_bank(data, WBCIR_BANK_0);
	outb(WBCIR_IRQ_NONE, data->sbase + WBCIR_REG_SP3_IER);

	/*
	 * ACPI will set the HW disable bit for SP3 which means that the
	 * output signals are left in an undefined state which may cause
	 * spurious interrupts which we need to ignore until the hardware
	 * is reinitialized.
	 */
	disable_irq(data->irq);
}

static int
wbcir_suspend(struct pnp_dev *device, pm_message_t state)
{
	wbcir_shutdown(device);
	return 0;
}

static void
wbcir_init_hw(struct wbcir_data *data)
{
	u8 tmp;

	/* Disable interrupts */
	wbcir_select_bank(data, WBCIR_BANK_0);
	outb(WBCIR_IRQ_NONE, data->sbase + WBCIR_REG_SP3_IER);

	/* Set PROT_SEL, RX_INV, Clear CEIR_EN (needed for the led) */
	tmp = protocol << 4;
	if (invert)
		tmp |= 0x08;
	outb(tmp, data->wbase + WBCIR_REG_WCEIR_CTL);

	/* Clear status bits NEC_REP, BUFF, MSG_END, MATCH */
	wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_STS, 0x17, 0x17);

	/* Clear BUFF_EN, Clear END_EN, Clear MATCH_EN */
	wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x00, 0x07);

	/* Set RC5 cell time to correspond to 36 kHz */
	wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CFG1, 0x4A, 0x7F);

	/* Set IRTX_INV */
	if (invert)
		outb(0x04, data->ebase + WBCIR_REG_ECEIR_CCTL);
	else
		outb(0x00, data->ebase + WBCIR_REG_ECEIR_CCTL);

	/*
	 * Clear IR LED, set SP3 clock to 24Mhz
	 * set SP3_IRRX_SW to binary 01, helpfully not documented
	 */
	outb(0x10, data->ebase + WBCIR_REG_ECEIR_CTS);

	/* Enable extended mode */
	wbcir_select_bank(data, WBCIR_BANK_2);
	outb(WBCIR_EXT_ENABLE, data->sbase + WBCIR_REG_SP3_EXCR1);

	/*
	 * Configure baud generator, IR data will be sampled at
	 * a bitrate of: (24Mhz * prescaler) / (divisor * 16).
	 *
	 * The ECIR registers include a flag to change the
	 * 24Mhz clock freq to 48Mhz.
	 *
	 * It's not documented in the specs, but fifo levels
	 * other than 16 seems to be unsupported.
	 */

	/* prescaler 1.0, tx/rx fifo lvl 16 */
	outb(0x30, data->sbase + WBCIR_REG_SP3_EXCR2);

	/* Set baud divisor to generate one byte per bit/cell */
	switch (protocol) {
	case IR_PROTOCOL_RC5:
		outb(0xA7, data->sbase + WBCIR_REG_SP3_BGDL);
		break;
	case IR_PROTOCOL_RC6:
		outb(0x53, data->sbase + WBCIR_REG_SP3_BGDL);
		break;
	case IR_PROTOCOL_NEC:
		outb(0x69, data->sbase + WBCIR_REG_SP3_BGDL);
		break;
	}
	outb(0x00, data->sbase + WBCIR_REG_SP3_BGDH);

	/* Set CEIR mode */
	wbcir_select_bank(data, WBCIR_BANK_0);
	outb(0xC0, data->sbase + WBCIR_REG_SP3_MCR);
	inb(data->sbase + WBCIR_REG_SP3_LSR); /* Clear LSR */
	inb(data->sbase + WBCIR_REG_SP3_MSR); /* Clear MSR */

	/* Disable RX demod, run-length encoding/decoding, set freq span */
	wbcir_select_bank(data, WBCIR_BANK_7);
	outb(0x10, data->sbase + WBCIR_REG_SP3_RCCFG);

	/* Disable timer */
	wbcir_select_bank(data, WBCIR_BANK_4);
	outb(0x00, data->sbase + WBCIR_REG_SP3_IRCR1);

	/* Enable MSR interrupt, Clear AUX_IRX */
	wbcir_select_bank(data, WBCIR_BANK_5);
	outb(0x00, data->sbase + WBCIR_REG_SP3_IRCR2);

	/* Disable CRC */
	wbcir_select_bank(data, WBCIR_BANK_6);
	outb(0x20, data->sbase + WBCIR_REG_SP3_IRCR3);

	/* Set RX/TX (de)modulation freq, not really used */
	wbcir_select_bank(data, WBCIR_BANK_7);
	outb(0xF2, data->sbase + WBCIR_REG_SP3_IRRXDC);
	outb(0x69, data->sbase + WBCIR_REG_SP3_IRTXMC);

	/* Set invert and pin direction */
	if (invert)
		outb(0x10, data->sbase + WBCIR_REG_SP3_IRCFG4);
	else
		outb(0x00, data->sbase + WBCIR_REG_SP3_IRCFG4);

	/* Set FIFO thresholds (RX = 8, TX = 3), reset RX/TX */
	wbcir_select_bank(data, WBCIR_BANK_0);
	outb(0x97, data->sbase + WBCIR_REG_SP3_FCR);

	/* Clear AUX status bits */
	outb(0xE0, data->sbase + WBCIR_REG_SP3_ASCR);

	/* Enable interrupts */
	wbcir_reset_irdata(data);
	outb(WBCIR_IRQ_RX | WBCIR_IRQ_ERR, data->sbase + WBCIR_REG_SP3_IER);
}

static int
wbcir_resume(struct pnp_dev *device)
{
	struct wbcir_data *data = pnp_get_drvdata(device);

	wbcir_init_hw(data);
	enable_irq(data->irq);

	return 0;
}

static int __devinit
wbcir_probe(struct pnp_dev *device, const struct pnp_device_id *dev_id)
{
	struct device *dev = &device->dev;
	struct wbcir_data *data;
	int err;

	if (!(pnp_port_len(device, 0) == EHFUNC_IOMEM_LEN &&
	      pnp_port_len(device, 1) == WAKEUP_IOMEM_LEN &&
	      pnp_port_len(device, 2) == SP_IOMEM_LEN)) {
		dev_err(dev, "Invalid resources\n");
		return -ENODEV;
	}

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (!data) {
		err = -ENOMEM;
		goto exit;
	}

	pnp_set_drvdata(device, data);

	data->ebase = pnp_port_start(device, 0);
	data->wbase = pnp_port_start(device, 1);
	data->sbase = pnp_port_start(device, 2);
	data->irq = pnp_irq(device, 0);

	if (data->wbase == 0 || data->ebase == 0 ||
	    data->sbase == 0 || data->irq == 0) {
		err = -ENODEV;
		dev_err(dev, "Invalid resources\n");
		goto exit_free_data;
	}

	dev_dbg(&device->dev, "Found device "
		"(w: 0x%lX, e: 0x%lX, s: 0x%lX, i: %u)\n",
		data->wbase, data->ebase, data->sbase, data->irq);

	if (!request_region(data->wbase, WAKEUP_IOMEM_LEN, DRVNAME)) {
		dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
			data->wbase, data->wbase + WAKEUP_IOMEM_LEN - 1);
		err = -EBUSY;
		goto exit_free_data;
	}

	if (!request_region(data->ebase, EHFUNC_IOMEM_LEN, DRVNAME)) {
		dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
			data->ebase, data->ebase + EHFUNC_IOMEM_LEN - 1);
		err = -EBUSY;
		goto exit_release_wbase;
	}

	if (!request_region(data->sbase, SP_IOMEM_LEN, DRVNAME)) {
		dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
			data->sbase, data->sbase + SP_IOMEM_LEN - 1);
		err = -EBUSY;
		goto exit_release_ebase;
	}

	err = request_irq(data->irq, wbcir_irq_handler,
			  IRQF_DISABLED, DRVNAME, device);
	if (err) {
		dev_err(dev, "Failed to claim IRQ %u\n", data->irq);
		err = -EBUSY;
		goto exit_release_sbase;
	}

	led_trigger_register_simple("cir-tx", &data->txtrigger);
	if (!data->txtrigger) {
		err = -ENOMEM;
		goto exit_free_irq;
	}

	led_trigger_register_simple("cir-rx", &data->rxtrigger);
	if (!data->rxtrigger) {
		err = -ENOMEM;
		goto exit_unregister_txtrigger;
	}

	data->led.name = "cir::activity";
	data->led.default_trigger = "cir-rx";
	data->led.brightness_set = wbcir_led_brightness_set;
	data->led.brightness_get = wbcir_led_brightness_get;
	err = led_classdev_register(&device->dev, &data->led);
	if (err)
		goto exit_unregister_rxtrigger;

	data->input_dev = input_allocate_device();
	if (!data->input_dev) {
		err = -ENOMEM;
		goto exit_unregister_led;
	}

	data->input_dev->evbit[0] = BIT(EV_KEY);
	data->input_dev->name = WBCIR_NAME;
	data->input_dev->phys = "wbcir/cir0";
	data->input_dev->id.bustype = BUS_HOST;
	data->input_dev->id.vendor  = PCI_VENDOR_ID_WINBOND;
	data->input_dev->id.product = WBCIR_ID_FAMILY;
	data->input_dev->id.version = WBCIR_ID_CHIP;
	data->input_dev->getkeycode = wbcir_getkeycode;
	data->input_dev->setkeycode = wbcir_setkeycode;
	input_set_capability(data->input_dev, EV_MSC, MSC_SCAN);
	input_set_drvdata(data->input_dev, data);

	err = input_register_device(data->input_dev);
	if (err)
		goto exit_free_input;

	data->last_scancode = INVALID_SCANCODE;
	INIT_LIST_HEAD(&data->keytable);
	setup_timer(&data->timer_keyup, wbcir_keyup, (unsigned long)data);

	/* Load default keymaps */
	if (protocol == IR_PROTOCOL_RC6) {
		int i;
		for (i = 0; i < ARRAY_SIZE(rc6_def_keymap); i++) {
			err = wbcir_setkeycode(data->input_dev,
					       (int)rc6_def_keymap[i].scancode,
					       (int)rc6_def_keymap[i].keycode);
			if (err)
				goto exit_unregister_keys;
		}
	}

	device_init_wakeup(&device->dev, 1);

	wbcir_init_hw(data);

	return 0;

exit_unregister_keys:
	if (!list_empty(&data->keytable)) {
		struct wbcir_keyentry *key;
		struct wbcir_keyentry *keytmp;

		list_for_each_entry_safe(key, keytmp, &data->keytable, list) {
			list_del(&key->list);
			kfree(key);
		}
	}
	input_unregister_device(data->input_dev);
	/* Can't call input_free_device on an unregistered device */
	data->input_dev = NULL;
exit_free_input:
	input_free_device(data->input_dev);
exit_unregister_led:
	led_classdev_unregister(&data->led);
exit_unregister_rxtrigger:
	led_trigger_unregister_simple(data->rxtrigger);
exit_unregister_txtrigger:
	led_trigger_unregister_simple(data->txtrigger);
exit_free_irq:
	free_irq(data->irq, device);
exit_release_sbase:
	release_region(data->sbase, SP_IOMEM_LEN);
exit_release_ebase:
	release_region(data->ebase, EHFUNC_IOMEM_LEN);
exit_release_wbase:
	release_region(data->wbase, WAKEUP_IOMEM_LEN);
exit_free_data:
	kfree(data);
	pnp_set_drvdata(device, NULL);
exit:
	return err;
}

static void __devexit
wbcir_remove(struct pnp_dev *device)
{
	struct wbcir_data *data = pnp_get_drvdata(device);
	struct wbcir_keyentry *key;
	struct wbcir_keyentry *keytmp;

	/* Disable interrupts */
	wbcir_select_bank(data, WBCIR_BANK_0);
	outb(WBCIR_IRQ_NONE, data->sbase + WBCIR_REG_SP3_IER);

	del_timer_sync(&data->timer_keyup);

	free_irq(data->irq, device);

	/* Clear status bits NEC_REP, BUFF, MSG_END, MATCH */
	wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_STS, 0x17, 0x17);

	/* Clear CEIR_EN */
	wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CTL, 0x00, 0x01);

	/* Clear BUFF_EN, END_EN, MATCH_EN */
	wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x00, 0x07);

	/* This will generate a keyup event if necessary */
	input_unregister_device(data->input_dev);

	led_trigger_unregister_simple(data->rxtrigger);
	led_trigger_unregister_simple(data->txtrigger);
	led_classdev_unregister(&data->led);

	/* This is ok since &data->led isn't actually used */
	wbcir_led_brightness_set(&data->led, LED_OFF);

	release_region(data->wbase, WAKEUP_IOMEM_LEN);
	release_region(data->ebase, EHFUNC_IOMEM_LEN);
	release_region(data->sbase, SP_IOMEM_LEN);

	list_for_each_entry_safe(key, keytmp, &data->keytable, list) {
		list_del(&key->list);
		kfree(key);
	}

	kfree(data);

	pnp_set_drvdata(device, NULL);
}

static const struct pnp_device_id wbcir_ids[] = {
	{ "WEC1022", 0 },
	{ "", 0 }
};
MODULE_DEVICE_TABLE(pnp, wbcir_ids);

static struct pnp_driver wbcir_driver = {
	.name     = WBCIR_NAME,
	.id_table = wbcir_ids,
	.probe    = wbcir_probe,
	.remove   = __devexit_p(wbcir_remove),
	.suspend  = wbcir_suspend,
	.resume   = wbcir_resume,
	.shutdown = wbcir_shutdown
};

static int __init
wbcir_init(void)
{
	int ret;

	switch (protocol) {
	case IR_PROTOCOL_RC5:
	case IR_PROTOCOL_NEC:
	case IR_PROTOCOL_RC6:
		break;
	default:
		printk(KERN_ERR DRVNAME ": Invalid protocol argument\n");
		return -EINVAL;
	}

	ret = pnp_register_driver(&wbcir_driver);
	if (ret)
		printk(KERN_ERR DRVNAME ": Unable to register driver\n");

	return ret;
}

static void __exit
wbcir_exit(void)
{
	pnp_unregister_driver(&wbcir_driver);
}

MODULE_AUTHOR("David Härdeman <david@hardeman.nu>");
MODULE_DESCRIPTION("Winbond SuperI/O Consumer IR Driver");
MODULE_LICENSE("GPL");

module_init(wbcir_init);
module_exit(wbcir_exit);


OpenPOWER on IntegriCloud