aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/video/saa7134/saa7134-input.c
blob: e5565e2fd4262e4f92d7916f1d4eb4d9a1e6945e (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
/*
 *
 * handle saa7134 IR remotes via linux kernel input layer.
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/slab.h>

#include "saa7134-reg.h"
#include "saa7134.h"

#define MODULE_NAME "saa7134"

static unsigned int disable_ir;
module_param(disable_ir, int, 0444);
MODULE_PARM_DESC(disable_ir,"disable infrared remote support");

static unsigned int ir_debug;
module_param(ir_debug, int, 0644);
MODULE_PARM_DESC(ir_debug,"enable debug messages [IR]");

static int pinnacle_remote;
module_param(pinnacle_remote, int, 0644);    /* Choose Pinnacle PCTV remote */
MODULE_PARM_DESC(pinnacle_remote, "Specify Pinnacle PCTV remote: 0=coloured, 1=grey (defaults to 0)");

static int ir_rc5_remote_gap = 885;
module_param(ir_rc5_remote_gap, int, 0644);
static int ir_rc5_key_timeout = 115;
module_param(ir_rc5_key_timeout, int, 0644);

static int repeat_delay = 500;
module_param(repeat_delay, int, 0644);
MODULE_PARM_DESC(repeat_delay, "delay before key repeat started");
static int repeat_period = 33;
module_param(repeat_period, int, 0644);
MODULE_PARM_DESC(repeat_period, "repeat period between "
    "keypresses when key is down");

static unsigned int disable_other_ir;
module_param(disable_other_ir, int, 0644);
MODULE_PARM_DESC(disable_other_ir, "disable full codes of "
    "alternative remotes from other manufacturers");

#define dprintk(fmt, arg...)	if (ir_debug) \
	printk(KERN_DEBUG "%s/ir: " fmt, dev->name , ## arg)
#define i2cdprintk(fmt, arg...)    if (ir_debug) \
	printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg)

/* Helper functions for RC5 and NEC decoding at GPIO16 or GPIO18 */
static int saa7134_rc5_irq(struct saa7134_dev *dev);
static int saa7134_nec_irq(struct saa7134_dev *dev);
static int saa7134_raw_decode_irq(struct saa7134_dev *dev);
static void nec_task(unsigned long data);
static void saa7134_nec_timer(unsigned long data);

/* -------------------- GPIO generic keycode builder -------------------- */

static int build_key(struct saa7134_dev *dev)
{
	struct card_ir *ir = dev->remote;
	u32 gpio, data;

	/* here comes the additional handshake steps for some cards */
	switch (dev->board) {
	case SAA7134_BOARD_GOTVIEW_7135:
		saa_setb(SAA7134_GPIO_GPSTATUS1, 0x80);
		saa_clearb(SAA7134_GPIO_GPSTATUS1, 0x80);
		break;
	}
	/* rising SAA7134_GPIO_GPRESCAN reads the status */
	saa_clearb(SAA7134_GPIO_GPMODE3,SAA7134_GPIO_GPRESCAN);
	saa_setb(SAA7134_GPIO_GPMODE3,SAA7134_GPIO_GPRESCAN);

	gpio = saa_readl(SAA7134_GPIO_GPSTATUS0 >> 2);
	if (ir->polling) {
		if (ir->last_gpio == gpio)
			return 0;
		ir->last_gpio = gpio;
	}

	data = ir_extract_bits(gpio, ir->mask_keycode);
	dprintk("build_key gpio=0x%x mask=0x%x data=%d\n",
		gpio, ir->mask_keycode, data);

	switch (dev->board) {
	case SAA7134_BOARD_KWORLD_PLUS_TV_ANALOG:
		if (data == ir->mask_keycode)
			ir_input_nokey(ir->dev, &ir->ir);
		else
			ir_input_keydown(ir->dev, &ir->ir, data);
		return 0;
	}

	if (ir->polling) {
		if ((ir->mask_keydown  &&  (0 != (gpio & ir->mask_keydown))) ||
		    (ir->mask_keyup    &&  (0 == (gpio & ir->mask_keyup)))) {
			ir_input_keydown(ir->dev, &ir->ir, data);
		} else {
			ir_input_nokey(ir->dev, &ir->ir);
		}
	}
	else {	/* IRQ driven mode - handle key press and release in one go */
		if ((ir->mask_keydown  &&  (0 != (gpio & ir->mask_keydown))) ||
		    (ir->mask_keyup    &&  (0 == (gpio & ir->mask_keyup)))) {
			ir_input_keydown(ir->dev, &ir->ir, data);
			ir_input_nokey(ir->dev, &ir->ir);
		}
	}

	return 0;
}

/* --------------------- Chip specific I2C key builders ----------------- */

static int get_key_flydvb_trio(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
	int gpio;
	int attempt = 0;
	unsigned char b;

	/* We need this to access GPI Used by the saa_readl macro. */
	struct saa7134_dev *dev = ir->c->adapter->algo_data;

	if (dev == NULL) {
		dprintk("get_key_flydvb_trio: "
			 "gir->c->adapter->algo_data is NULL!\n");
		return -EIO;
	}

	/* rising SAA7134_GPIGPRESCAN reads the status */
	saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
	saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);

	gpio = saa_readl(SAA7134_GPIO_GPSTATUS0 >> 2);

	if (0x40000 & ~gpio)
		return 0; /* No button press */

	/* No button press - only before first key pressed */
	if (b == 0xFF)
		return 0;

	/* poll IR chip */
	/* weak up the IR chip */
	b = 0;

	while (1 != i2c_master_send(ir->c, &b, 1)) {
		if ((attempt++) < 10) {
			/*
			 * wait a bit for next attempt -
			 * I don't know how make it better
			 */
			msleep(10);
			continue;
		}
		i2cdprintk("send wake up byte to pic16C505 (IR chip)"
			   "failed %dx\n", attempt);
		return -EIO;
	}
	if (1 != i2c_master_recv(ir->c, &b, 1)) {
		i2cdprintk("read error\n");
		return -EIO;
	}

	*ir_key = b;
	*ir_raw = b;
	return 1;
}

static int get_key_msi_tvanywhere_plus(struct IR_i2c *ir, u32 *ir_key,
				       u32 *ir_raw)
{
	unsigned char b;
	int gpio;

	/* <dev> is needed to access GPIO. Used by the saa_readl macro. */
	struct saa7134_dev *dev = ir->c->adapter->algo_data;
	if (dev == NULL) {
		dprintk("get_key_msi_tvanywhere_plus: "
			"gir->c->adapter->algo_data is NULL!\n");
		return -EIO;
	}

	/* rising SAA7134_GPIO_GPRESCAN reads the status */

	saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
	saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);

	gpio = saa_readl(SAA7134_GPIO_GPSTATUS0 >> 2);

	/* GPIO&0x40 is pulsed low when a button is pressed. Don't do
	   I2C receive if gpio&0x40 is not low. */

	if (gpio & 0x40)
		return 0;       /* No button press */

	/* GPIO says there is a button press. Get it. */

	if (1 != i2c_master_recv(ir->c, &b, 1)) {
		i2cdprintk("read error\n");
		return -EIO;
	}

	/* No button press */

	if (b == 0xff)
		return 0;

	/* Button pressed */

	dprintk("get_key_msi_tvanywhere_plus: Key = 0x%02X\n", b);
	*ir_key = b;
	*ir_raw = b;
	return 1;
}

static int get_key_purpletv(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
	unsigned char b;

	/* poll IR chip */
	if (1 != i2c_master_recv(ir->c, &b, 1)) {
		i2cdprintk("read error\n");
		return -EIO;
	}

	/* no button press */
	if (b==0)
		return 0;

	/* repeating */
	if (b & 0x80)
		return 1;

	*ir_key = b;
	*ir_raw = b;
	return 1;
}

static int get_key_hvr1110(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
	unsigned char buf[5], cod4, code3, code4;

	/* poll IR chip */
	if (5 != i2c_master_recv(ir->c, buf, 5))
		return -EIO;

	cod4	= buf[4];
	code4	= (cod4 >> 2);
	code3	= buf[3];
	if (code3 == 0)
		/* no key pressed */
		return 0;

	/* return key */
	*ir_key = code4;
	*ir_raw = code4;
	return 1;
}


static int get_key_beholdm6xx(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
	unsigned char data[12];
	u32 gpio;

	struct saa7134_dev *dev = ir->c->adapter->algo_data;

	/* rising SAA7134_GPIO_GPRESCAN reads the status */
	saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
	saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);

	gpio = saa_readl(SAA7134_GPIO_GPSTATUS0 >> 2);

	if (0x400000 & ~gpio)
		return 0; /* No button press */

	ir->c->addr = 0x5a >> 1;

	if (12 != i2c_master_recv(ir->c, data, 12)) {
		i2cdprintk("read error\n");
		return -EIO;
	}
	/* IR of this card normally decode signals NEC-standard from
	 * - Sven IHOO MT 5.1R remote. xxyye718
	 * - Sven DVD HD-10xx remote. xxyyf708
	 * - BBK ...
	 * - mayby others
	 * So, skip not our, if disable full codes mode.
	 */
	if (data[10] != 0x6b && data[11] != 0x86 && disable_other_ir)
		return 0;

	/* Wrong data decode fix */
	if (data[9] != (unsigned char)(~data[8]))
		return 0;

	*ir_key = data[9];
	*ir_raw = data[9];

	return 1;
}

/* Common (grey or coloured) pinnacle PCTV remote handling
 *
 */
static int get_key_pinnacle(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw,
			    int parity_offset, int marker, int code_modulo)
{
	unsigned char b[4];
	unsigned int start = 0,parity = 0,code = 0;

	/* poll IR chip */
	if (4 != i2c_master_recv(ir->c, b, 4)) {
		i2cdprintk("read error\n");
		return -EIO;
	}

	for (start = 0; start < ARRAY_SIZE(b); start++) {
		if (b[start] == marker) {
			code=b[(start+parity_offset + 1) % 4];
			parity=b[(start+parity_offset) % 4];
		}
	}

	/* Empty Request */
	if (parity == 0)
		return 0;

	/* Repeating... */
	if (ir->old == parity)
		return 0;

	ir->old = parity;

	/* drop special codes when a key is held down a long time for the grey controller
	   In this case, the second bit of the code is asserted */
	if (marker == 0xfe && (code & 0x40))
		return 0;

	code %= code_modulo;

	*ir_raw = code;
	*ir_key = code;

	i2cdprintk("Pinnacle PCTV key %02x\n", code);

	return 1;
}

/* The grey pinnacle PCTV remote
 *
 *  There are one issue with this remote:
 *   - I2c packet does not change when the same key is pressed quickly. The workaround
 *     is to hold down each key for about half a second, so that another code is generated
 *     in the i2c packet, and the function can distinguish key presses.
 *
 * Sylvain Pasche <sylvain.pasche@gmail.com>
 */
static int get_key_pinnacle_grey(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{

	return get_key_pinnacle(ir, ir_key, ir_raw, 1, 0xfe, 0xff);
}


/* The new pinnacle PCTV remote (with the colored buttons)
 *
 * Ricardo Cerqueira <v4l@cerqueira.org>
 */
static int get_key_pinnacle_color(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
	/* code_modulo parameter (0x88) is used to reduce code value to fit inside IR_KEYTAB_SIZE
	 *
	 * this is the only value that results in 42 unique
	 * codes < 128
	 */

	return get_key_pinnacle(ir, ir_key, ir_raw, 2, 0x80, 0x88);
}

void saa7134_input_irq(struct saa7134_dev *dev)
{
	struct card_ir *ir;

	if (!dev || !dev->remote)
		return;

	ir = dev->remote;
	if (!ir->running)
		return;

	if (ir->nec_gpio) {
		saa7134_nec_irq(dev);
	} else if (!ir->polling && !ir->rc5_gpio && !ir->raw_decode) {
		build_key(dev);
	} else if (ir->rc5_gpio) {
		saa7134_rc5_irq(dev);
	} else if (ir->raw_decode) {
		saa7134_raw_decode_irq(dev);
	}
}

static void saa7134_input_timer(unsigned long data)
{
	struct saa7134_dev *dev = (struct saa7134_dev *)data;
	struct card_ir *ir = dev->remote;

	build_key(dev);
	mod_timer(&ir->timer, jiffies + msecs_to_jiffies(ir->polling));
}

void ir_raw_decode_timer_end(unsigned long data)
{
	struct saa7134_dev *dev = (struct saa7134_dev *)data;
	struct card_ir *ir = dev->remote;

	ir_raw_event_handle(dev->remote->dev);

	ir->active = 0;
}

static int __saa7134_ir_start(void *priv)
{
	struct saa7134_dev *dev = priv;
	struct card_ir *ir;

	if (!dev)
		return -EINVAL;

	ir  = dev->remote;
	if (!ir)
		return -EINVAL;

	if (ir->running)
		return 0;

	ir->running = 1;
	if (ir->polling) {
		setup_timer(&ir->timer, saa7134_input_timer,
			    (unsigned long)dev);
		ir->timer.expires  = jiffies + HZ;
		add_timer(&ir->timer);
	} else if (ir->rc5_gpio) {
		/* set timer_end for code completion */
		init_timer(&ir->timer_end);
		ir->timer_end.function = ir_rc5_timer_end;
		ir->timer_end.data = (unsigned long)ir;
		init_timer(&ir->timer_keyup);
		ir->timer_keyup.function = ir_rc5_timer_keyup;
		ir->timer_keyup.data = (unsigned long)ir;
		ir->shift_by = 2;
		ir->start = 0x2;
		ir->addr = 0x17;
		ir->rc5_key_timeout = ir_rc5_key_timeout;
		ir->rc5_remote_gap = ir_rc5_remote_gap;
	} else if (ir->nec_gpio) {
		setup_timer(&ir->timer_keyup, saa7134_nec_timer,
			    (unsigned long)dev);
		tasklet_init(&ir->tlet, nec_task, (unsigned long)dev);
	} else if (ir->raw_decode) {
		/* set timer_end for code completion */
		init_timer(&ir->timer_end);
		ir->timer_end.function = ir_raw_decode_timer_end;
		ir->timer_end.data = (unsigned long)dev;
		ir->active = 0;
	}

	return 0;
}

static void __saa7134_ir_stop(void *priv)
{
	struct saa7134_dev *dev = priv;
	struct card_ir *ir;

	if (!dev)
		return;

	ir  = dev->remote;
	if (!ir)
		return;

	if (!ir->running)
		return;
	if (dev->remote->polling)
		del_timer_sync(&dev->remote->timer);
	else if (ir->rc5_gpio)
		del_timer_sync(&ir->timer_end);
	else if (ir->nec_gpio)
		tasklet_kill(&ir->tlet);
	else if (ir->raw_decode) {
		del_timer_sync(&ir->timer_end);
		ir->active = 0;
	}

	ir->running = 0;

	return;
}

int saa7134_ir_start(struct saa7134_dev *dev)
{
	if (dev->remote->users)
		return __saa7134_ir_start(dev);

	return 0;
}

void saa7134_ir_stop(struct saa7134_dev *dev)
{
	if (dev->remote->users)
		__saa7134_ir_stop(dev);
}

static int saa7134_ir_open(void *priv)
{
	struct saa7134_dev *dev = priv;

	dev->remote->users++;
	return __saa7134_ir_start(dev);
}

static void saa7134_ir_close(void *priv)
{
	struct saa7134_dev *dev = priv;

	dev->remote->users--;
	if (!dev->remote->users)
		__saa7134_ir_stop(dev);
}


int saa7134_ir_change_protocol(void *priv, u64 ir_type)
{
	struct saa7134_dev *dev = priv;
	struct card_ir *ir = dev->remote;
	u32 nec_gpio, rc5_gpio;

	if (ir_type == IR_TYPE_RC5) {
		dprintk("Changing protocol to RC5\n");
		nec_gpio = 0;
		rc5_gpio = 1;
	} else if (ir_type == IR_TYPE_NEC) {
		dprintk("Changing protocol to NEC\n");
		nec_gpio = 1;
		rc5_gpio = 0;
	} else {
		dprintk("IR protocol type %ud is not supported\n",
			(unsigned)ir_type);
		return -EINVAL;
	}

	if (ir->running) {
		saa7134_ir_stop(dev);
		ir->nec_gpio = nec_gpio;
		ir->rc5_gpio = rc5_gpio;
		saa7134_ir_start(dev);
	} else {
		ir->nec_gpio = nec_gpio;
		ir->rc5_gpio = rc5_gpio;
	}

	return 0;
}

int saa7134_input_init1(struct saa7134_dev *dev)
{
	struct card_ir *ir;
	struct input_dev *input_dev;
	char *ir_codes = NULL;
	u32 mask_keycode = 0;
	u32 mask_keydown = 0;
	u32 mask_keyup   = 0;
	int polling      = 0;
	int rc5_gpio	 = 0;
	int nec_gpio	 = 0;
	int raw_decode   = 0;
	int allow_protocol_change = 0;
	u64 ir_type = IR_TYPE_OTHER;
	int err;

	if (dev->has_remote != SAA7134_REMOTE_GPIO)
		return -ENODEV;
	if (disable_ir)
		return -ENODEV;

	/* detect & configure */
	switch (dev->board) {
	case SAA7134_BOARD_FLYVIDEO2000:
	case SAA7134_BOARD_FLYVIDEO3000:
	case SAA7134_BOARD_FLYTVPLATINUM_FM:
	case SAA7134_BOARD_FLYTVPLATINUM_MINI2:
	case SAA7134_BOARD_ROVERMEDIA_LINK_PRO_FM:
		ir_codes     = RC_MAP_FLYVIDEO;
		mask_keycode = 0xEC00000;
		mask_keydown = 0x0040000;
		break;
	case SAA7134_BOARD_CINERGY400:
	case SAA7134_BOARD_CINERGY600:
	case SAA7134_BOARD_CINERGY600_MK3:
		ir_codes     = RC_MAP_CINERGY;
		mask_keycode = 0x00003f;
		mask_keyup   = 0x040000;
		break;
	case SAA7134_BOARD_ECS_TVP3XP:
	case SAA7134_BOARD_ECS_TVP3XP_4CB5:
		ir_codes     = RC_MAP_EZTV;
		mask_keycode = 0x00017c;
		mask_keyup   = 0x000002;
		polling      = 50; // ms
		break;
	case SAA7134_BOARD_KWORLD_XPERT:
	case SAA7134_BOARD_AVACSSMARTTV:
		ir_codes     = RC_MAP_PIXELVIEW;
		mask_keycode = 0x00001F;
		mask_keyup   = 0x000020;
		polling      = 50; // ms
		break;
	case SAA7134_BOARD_MD2819:
	case SAA7134_BOARD_KWORLD_VSTREAM_XPERT:
	case SAA7134_BOARD_AVERMEDIA_305:
	case SAA7134_BOARD_AVERMEDIA_307:
	case SAA7134_BOARD_AVERMEDIA_STUDIO_305:
	case SAA7134_BOARD_AVERMEDIA_STUDIO_505:
	case SAA7134_BOARD_AVERMEDIA_STUDIO_307:
	case SAA7134_BOARD_AVERMEDIA_STUDIO_507:
	case SAA7134_BOARD_AVERMEDIA_STUDIO_507UA:
	case SAA7134_BOARD_AVERMEDIA_GO_007_FM:
	case SAA7134_BOARD_AVERMEDIA_M102:
	case SAA7134_BOARD_AVERMEDIA_GO_007_FM_PLUS:
		ir_codes     = RC_MAP_AVERMEDIA;
		mask_keycode = 0x0007C8;
		mask_keydown = 0x000010;
		polling      = 50; // ms
		/* Set GPIO pin2 to high to enable the IR controller */
		saa_setb(SAA7134_GPIO_GPMODE0, 0x4);
		saa_setb(SAA7134_GPIO_GPSTATUS0, 0x4);
		break;
	case SAA7134_BOARD_AVERMEDIA_M135A:
		ir_codes     = RC_MAP_AVERMEDIA_M135A_RM_JX;
		mask_keydown = 0x0040000;	/* Enable GPIO18 line on both edges */
		mask_keyup   = 0x0040000;
		mask_keycode = 0xffff;
		raw_decode   = 1;
		break;
	case SAA7134_BOARD_AVERMEDIA_777:
	case SAA7134_BOARD_AVERMEDIA_A16AR:
		ir_codes     = RC_MAP_AVERMEDIA;
		mask_keycode = 0x02F200;
		mask_keydown = 0x000400;
		polling      = 50; // ms
		/* Without this we won't receive key up events */
		saa_setb(SAA7134_GPIO_GPMODE1, 0x1);
		saa_setb(SAA7134_GPIO_GPSTATUS1, 0x1);
		break;
	case SAA7134_BOARD_AVERMEDIA_A16D:
		ir_codes     = RC_MAP_AVERMEDIA_A16D;
		mask_keycode = 0x02F200;
		mask_keydown = 0x000400;
		polling      = 50; /* ms */
		/* Without this we won't receive key up events */
		saa_setb(SAA7134_GPIO_GPMODE1, 0x1);
		saa_setb(SAA7134_GPIO_GPSTATUS1, 0x1);
		break;
	case SAA7134_BOARD_KWORLD_TERMINATOR:
		ir_codes     = RC_MAP_PIXELVIEW;
		mask_keycode = 0x00001f;
		mask_keyup   = 0x000060;
		polling      = 50; // ms
		break;
	case SAA7134_BOARD_MANLI_MTV001:
	case SAA7134_BOARD_MANLI_MTV002:
		ir_codes     = RC_MAP_MANLI;
		mask_keycode = 0x001f00;
		mask_keyup   = 0x004000;
		polling      = 50; /* ms */
		break;
	case SAA7134_BOARD_BEHOLD_409FM:
	case SAA7134_BOARD_BEHOLD_401:
	case SAA7134_BOARD_BEHOLD_403:
	case SAA7134_BOARD_BEHOLD_403FM:
	case SAA7134_BOARD_BEHOLD_405:
	case SAA7134_BOARD_BEHOLD_405FM:
	case SAA7134_BOARD_BEHOLD_407:
	case SAA7134_BOARD_BEHOLD_407FM:
	case SAA7134_BOARD_BEHOLD_409:
	case SAA7134_BOARD_BEHOLD_505FM:
	case SAA7134_BOARD_BEHOLD_505RDS_MK5:
	case SAA7134_BOARD_BEHOLD_505RDS_MK3:
	case SAA7134_BOARD_BEHOLD_507_9FM:
	case SAA7134_BOARD_BEHOLD_507RDS_MK3:
	case SAA7134_BOARD_BEHOLD_507RDS_MK5:
		ir_codes     = RC_MAP_MANLI;
		mask_keycode = 0x003f00;
		mask_keyup   = 0x004000;
		polling      = 50; /* ms */
		break;
	case SAA7134_BOARD_BEHOLD_COLUMBUS_TVFM:
		ir_codes     = RC_MAP_BEHOLD_COLUMBUS;
		mask_keycode = 0x003f00;
		mask_keyup   = 0x004000;
		polling      = 50; // ms
		break;
	case SAA7134_BOARD_SEDNA_PC_TV_CARDBUS:
		ir_codes     = RC_MAP_PCTV_SEDNA;
		mask_keycode = 0x001f00;
		mask_keyup   = 0x004000;
		polling      = 50; // ms
		break;
	case SAA7134_BOARD_GOTVIEW_7135:
		ir_codes     = RC_MAP_GOTVIEW7135;
		mask_keycode = 0x0003CC;
		mask_keydown = 0x000010;
		polling	     = 5; /* ms */
		saa_setb(SAA7134_GPIO_GPMODE1, 0x80);
		break;
	case SAA7134_BOARD_VIDEOMATE_TV_PVR:
	case SAA7134_BOARD_VIDEOMATE_GOLD_PLUS:
	case SAA7134_BOARD_VIDEOMATE_TV_GOLD_PLUSII:
		ir_codes     = RC_MAP_VIDEOMATE_TV_PVR;
		mask_keycode = 0x00003F;
		mask_keyup   = 0x400000;
		polling      = 50; // ms
		break;
	case SAA7134_BOARD_PROTEUS_2309:
		ir_codes     = RC_MAP_PROTEUS_2309;
		mask_keycode = 0x00007F;
		mask_keyup   = 0x000080;
		polling      = 50; // ms
		break;
	case SAA7134_BOARD_VIDEOMATE_DVBT_300:
	case SAA7134_BOARD_VIDEOMATE_DVBT_200:
		ir_codes     = RC_MAP_VIDEOMATE_TV_PVR;
		mask_keycode = 0x003F00;
		mask_keyup   = 0x040000;
		break;
	case SAA7134_BOARD_FLYDVBS_LR300:
	case SAA7134_BOARD_FLYDVBT_LR301:
	case SAA7134_BOARD_FLYDVBTDUO:
		ir_codes     = RC_MAP_FLYDVB;
		mask_keycode = 0x0001F00;
		mask_keydown = 0x0040000;
		break;
	case SAA7134_BOARD_ASUSTeK_P7131_DUAL:
	case SAA7134_BOARD_ASUSTeK_P7131_HYBRID_LNA:
	case SAA7134_BOARD_ASUSTeK_P7131_ANALOG:
		ir_codes     = RC_MAP_ASUS_PC39;
		mask_keydown = 0x0040000;
		rc5_gpio = 1;
		break;
	case SAA7134_BOARD_ENCORE_ENLTV:
	case SAA7134_BOARD_ENCORE_ENLTV_FM:
		ir_codes     = RC_MAP_ENCORE_ENLTV;
		mask_keycode = 0x00007f;
		mask_keyup   = 0x040000;
		polling      = 50; // ms
		break;
	case SAA7134_BOARD_ENCORE_ENLTV_FM53:
		ir_codes     = RC_MAP_ENCORE_ENLTV_FM53;
		mask_keydown = 0x0040000;
		mask_keycode = 0x00007f;
		nec_gpio = 1;
		break;
	case SAA7134_BOARD_10MOONSTVMASTER3:
		ir_codes     = RC_MAP_ENCORE_ENLTV;
		mask_keycode = 0x5f80000;
		mask_keyup   = 0x8000000;
		polling      = 50; //ms
		break;
	case SAA7134_BOARD_GENIUS_TVGO_A11MCE:
		ir_codes     = RC_MAP_GENIUS_TVGO_A11MCE;
		mask_keycode = 0xff;
		mask_keydown = 0xf00000;
		polling = 50; /* ms */
		break;
	case SAA7134_BOARD_REAL_ANGEL_220:
		ir_codes     = RC_MAP_REAL_AUDIO_220_32_KEYS;
		mask_keycode = 0x3f00;
		mask_keyup   = 0x4000;
		polling = 50; /* ms */
		break;
	case SAA7134_BOARD_KWORLD_PLUS_TV_ANALOG:
		ir_codes     = RC_MAP_KWORLD_PLUS_TV_ANALOG;
		mask_keycode = 0x7f;
		polling = 40; /* ms */
		break;
	case SAA7134_BOARD_VIDEOMATE_S350:
		ir_codes     = RC_MAP_VIDEOMATE_S350;
		mask_keycode = 0x003f00;
		mask_keydown = 0x040000;
		break;
	case SAA7134_BOARD_LEADTEK_WINFAST_DTV1000S:
		ir_codes     = RC_MAP_WINFAST;
		mask_keycode = 0x5f00;
		mask_keyup   = 0x020000;
		polling      = 50; /* ms */
		break;
	break;
	}
	if (NULL == ir_codes) {
		printk("%s: Oops: IR config error [card=%d]\n",
		       dev->name, dev->board);
		return -ENODEV;
	}

	ir = kzalloc(sizeof(*ir), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!ir || !input_dev) {
		err = -ENOMEM;
		goto err_out_free;
	}

	ir->dev = input_dev;
	dev->remote = ir;

	ir->running = 0;

	/* init hardware-specific stuff */
	ir->mask_keycode = mask_keycode;
	ir->mask_keydown = mask_keydown;
	ir->mask_keyup   = mask_keyup;
	ir->polling      = polling;
	ir->rc5_gpio	 = rc5_gpio;
	ir->nec_gpio	 = nec_gpio;
	ir->raw_decode	 = raw_decode;

	/* init input device */
	snprintf(ir->name, sizeof(ir->name), "saa7134 IR (%s)",
		 saa7134_boards[dev->board].name);
	snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0",
		 pci_name(dev->pci));


	ir->props.priv = dev;
	ir->props.open = saa7134_ir_open;
	ir->props.close = saa7134_ir_close;

	if (raw_decode)
		ir->props.driver_type = RC_DRIVER_IR_RAW;

	if (!raw_decode && allow_protocol_change) {
		ir->props.allowed_protos = IR_TYPE_RC5 | IR_TYPE_NEC;
		ir->props.change_protocol = saa7134_ir_change_protocol;
	}

	err = ir_input_init(input_dev, &ir->ir, ir_type);
	if (err < 0)
		goto err_out_free;

	input_dev->name = ir->name;
	input_dev->phys = ir->phys;
	input_dev->id.bustype = BUS_PCI;
	input_dev->id.version = 1;
	if (dev->pci->subsystem_vendor) {
		input_dev->id.vendor  = dev->pci->subsystem_vendor;
		input_dev->id.product = dev->pci->subsystem_device;
	} else {
		input_dev->id.vendor  = dev->pci->vendor;
		input_dev->id.product = dev->pci->device;
	}
	input_dev->dev.parent = &dev->pci->dev;

	err = ir_input_register(ir->dev, ir_codes, &ir->props, MODULE_NAME);
	if (err)
		goto err_out_free;

	/* the remote isn't as bouncy as a keyboard */
	ir->dev->rep[REP_DELAY] = repeat_delay;
	ir->dev->rep[REP_PERIOD] = repeat_period;

	return 0;

err_out_free:
	dev->remote = NULL;
	kfree(ir);
	return err;
}

void saa7134_input_fini(struct saa7134_dev *dev)
{
	if (NULL == dev->remote)
		return;

	saa7134_ir_stop(dev);
	ir_input_unregister(dev->remote->dev);
	kfree(dev->remote);
	dev->remote = NULL;
}

void saa7134_probe_i2c_ir(struct saa7134_dev *dev)
{
	struct i2c_board_info info;

	struct i2c_msg msg_msi = {
		.addr = 0x50,
		.flags = I2C_M_RD,
		.len = 0,
		.buf = NULL,
	};

	int rc;

	if (disable_ir) {
		dprintk("IR has been disabled, not probing for i2c remote\n");
		return;
	}

	memset(&info, 0, sizeof(struct i2c_board_info));
	memset(&dev->init_data, 0, sizeof(dev->init_data));
	strlcpy(info.type, "ir_video", I2C_NAME_SIZE);

	switch (dev->board) {
	case SAA7134_BOARD_PINNACLE_PCTV_110i:
	case SAA7134_BOARD_PINNACLE_PCTV_310i:
		dev->init_data.name = "Pinnacle PCTV";
		if (pinnacle_remote == 0) {
			dev->init_data.get_key = get_key_pinnacle_color;
			dev->init_data.ir_codes = RC_MAP_PINNACLE_COLOR;
			info.addr = 0x47;
		} else {
			dev->init_data.get_key = get_key_pinnacle_grey;
			dev->init_data.ir_codes = RC_MAP_PINNACLE_GREY;
			info.addr = 0x47;
		}
		break;
	case SAA7134_BOARD_UPMOST_PURPLE_TV:
		dev->init_data.name = "Purple TV";
		dev->init_data.get_key = get_key_purpletv;
		dev->init_data.ir_codes = RC_MAP_PURPLETV;
		info.addr = 0x7a;
		break;
	case SAA7134_BOARD_MSI_TVATANYWHERE_PLUS:
		dev->init_data.name = "MSI TV@nywhere Plus";
		dev->init_data.get_key = get_key_msi_tvanywhere_plus;
		dev->init_data.ir_codes = RC_MAP_MSI_TVANYWHERE_PLUS;
		info.addr = 0x30;
		/* MSI TV@nywhere Plus controller doesn't seem to
		   respond to probes unless we read something from
		   an existing device. Weird...
		   REVISIT: might no longer be needed */
		rc = i2c_transfer(&dev->i2c_adap, &msg_msi, 1);
		dprintk(KERN_DEBUG "probe 0x%02x @ %s: %s\n",
			msg_msi.addr, dev->i2c_adap.name,
			(1 == rc) ? "yes" : "no");
		break;
	case SAA7134_BOARD_HAUPPAUGE_HVR1110:
		dev->init_data.name = "HVR 1110";
		dev->init_data.get_key = get_key_hvr1110;
		dev->init_data.ir_codes = RC_MAP_HAUPPAUGE_NEW;
		info.addr = 0x71;
		break;
	case SAA7134_BOARD_BEHOLD_607FM_MK3:
	case SAA7134_BOARD_BEHOLD_607FM_MK5:
	case SAA7134_BOARD_BEHOLD_609FM_MK3:
	case SAA7134_BOARD_BEHOLD_609FM_MK5:
	case SAA7134_BOARD_BEHOLD_607RDS_MK3:
	case SAA7134_BOARD_BEHOLD_607RDS_MK5:
	case SAA7134_BOARD_BEHOLD_609RDS_MK3:
	case SAA7134_BOARD_BEHOLD_609RDS_MK5:
	case SAA7134_BOARD_BEHOLD_M6:
	case SAA7134_BOARD_BEHOLD_M63:
	case SAA7134_BOARD_BEHOLD_M6_EXTRA:
	case SAA7134_BOARD_BEHOLD_H6:
	case SAA7134_BOARD_BEHOLD_X7:
	case SAA7134_BOARD_BEHOLD_H7:
	case SAA7134_BOARD_BEHOLD_A7:
		dev->init_data.name = "BeholdTV";
		dev->init_data.get_key = get_key_beholdm6xx;
		dev->init_data.ir_codes = RC_MAP_BEHOLD;
		dev->init_data.type = IR_TYPE_NEC;
		info.addr = 0x2d;
		break;
	case SAA7134_BOARD_AVERMEDIA_CARDBUS_501:
	case SAA7134_BOARD_AVERMEDIA_CARDBUS_506:
		info.addr = 0x40;
		break;
	case SAA7134_BOARD_FLYDVB_TRIO:
		dev->init_data.name = "FlyDVB Trio";
		dev->init_data.get_key = get_key_flydvb_trio;
		dev->init_data.ir_codes = RC_MAP_FLYDVB;
		info.addr = 0x0b;
		break;
	default:
		dprintk("No I2C IR support for board %x\n", dev->board);
		return;
	}

	if (dev->init_data.name)
		info.platform_data = &dev->init_data;
	i2c_new_device(&dev->i2c_adap, &info);
}

static int saa7134_raw_decode_irq(struct saa7134_dev *dev)
{
	struct card_ir	*ir = dev->remote;
	unsigned long 	timeout;
	int space;

	/* Generate initial event */
	saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
	saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
	space = saa_readl(SAA7134_GPIO_GPSTATUS0 >> 2) & ir->mask_keydown;
	ir_raw_event_store_edge(dev->remote->dev, space ? IR_SPACE : IR_PULSE);


	/*
	 * Wait 15 ms from the start of the first IR event before processing
	 * the event. This time is enough for NEC protocol. May need adjustments
	 * to work with other protocols.
	 */
	if (!ir->active) {
		timeout = jiffies + jiffies_to_msecs(15);
		mod_timer(&ir->timer_end, timeout);
		ir->active = 1;
	}

	return 1;
}

static int saa7134_rc5_irq(struct saa7134_dev *dev)
{
	struct card_ir *ir = dev->remote;
	struct timeval tv;
	u32 gap;
	unsigned long current_jiffies, timeout;

	/* get time of bit */
	current_jiffies = jiffies;
	do_gettimeofday(&tv);

	/* avoid overflow with gap >1s */
	if (tv.tv_sec - ir->base_time.tv_sec > 1) {
		gap = 200000;
	} else {
		gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) +
		    tv.tv_usec - ir->base_time.tv_usec;
	}

	/* active code => add bit */
	if (ir->active) {
		/* only if in the code (otherwise spurious IRQ or timer
		   late) */
		if (ir->last_bit < 28) {
			ir->last_bit = (gap - ir_rc5_remote_gap / 2) /
			    ir_rc5_remote_gap;
			ir->code |= 1 << ir->last_bit;
		}
		/* starting new code */
	} else {
		ir->active = 1;
		ir->code = 0;
		ir->base_time = tv;
		ir->last_bit = 0;

		timeout = current_jiffies + (500 + 30 * HZ) / 1000;
		mod_timer(&ir->timer_end, timeout);
	}

	return 1;
}

/* On NEC protocol, One has 2.25 ms, and zero has 1.125 ms
   The first pulse (start) has 9 + 4.5 ms
 */

static void saa7134_nec_timer(unsigned long data)
{
	struct saa7134_dev *dev = (struct saa7134_dev *) data;
	struct card_ir *ir = dev->remote;

	dprintk("Cancel key repeat\n");

	ir_input_nokey(ir->dev, &ir->ir);
}

static void nec_task(unsigned long data)
{
	struct saa7134_dev *dev = (struct saa7134_dev *) data;
	struct card_ir *ir;
	struct timeval tv;
	int count, pulse, oldpulse, gap;
	u32 ircode = 0, not_code = 0;
	int ngap = 0;

	if (!data) {
		printk(KERN_ERR "saa713x/ir: Can't recover dev struct\n");
		/* GPIO will be kept disabled */
		return;
	}

	ir = dev->remote;

	/* rising SAA7134_GPIO_GPRESCAN reads the status */
	saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
	saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);

	oldpulse = saa_readl(SAA7134_GPIO_GPSTATUS0 >> 2) & ir->mask_keydown;
	pulse = oldpulse;

	do_gettimeofday(&tv);
	ir->base_time = tv;

	/* Decode NEC pulsecode. This code can take up to 76.5 ms to run.
	   Unfortunately, using IRQ to decode pulse didn't work, since it uses
	   a pulse train of 38KHz. This means one pulse on each 52 us
	 */
	do {
		/* Wait until the end of pulse/space or 5 ms */
		for (count = 0; count < 500; count++)  {
			udelay(10);
			/* rising SAA7134_GPIO_GPRESCAN reads the status */
			saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
			saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
			pulse = saa_readl(SAA7134_GPIO_GPSTATUS0 >> 2)
				& ir->mask_keydown;
			if (pulse != oldpulse)
				break;
		}

		do_gettimeofday(&tv);
		gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) +
				tv.tv_usec - ir->base_time.tv_usec;

		if (!pulse) {
			/* Bit 0 has 560 us, while bit 1 has 1120 us.
			   Do something only if bit == 1
			 */
			if (ngap && (gap > 560 + 280)) {
				unsigned int shift = ngap - 1;

				/* Address first, then command */
				if (shift < 8) {
					shift += 8;
					ircode |= 1 << shift;
				} else if (shift < 16) {
					not_code |= 1 << shift;
				} else if (shift < 24) {
					shift -= 16;
					ircode |= 1 << shift;
				} else {
					shift -= 24;
					not_code |= 1 << shift;
				}
			}
			ngap++;
		}


		ir->base_time = tv;

		/* TIMEOUT - Long pulse */
		if (gap >= 5000)
			break;
		oldpulse = pulse;
	} while (ngap < 32);

	if (ngap == 32) {
		/* FIXME: should check if not_code == ~ircode */
		ir->code = ir_extract_bits(ircode, ir->mask_keycode);

		dprintk("scancode = 0x%02x (code = 0x%02x, notcode= 0x%02x)\n",
			 ir->code, ircode, not_code);

		ir_input_keydown(ir->dev, &ir->ir, ir->code);
	} else
		dprintk("Repeat last key\n");

	/* Keep repeating the last key */
	mod_timer(&ir->timer_keyup, jiffies + msecs_to_jiffies(150));

	saa_setl(SAA7134_IRQ2, SAA7134_IRQ2_INTE_GPIO18_P);
}

static int saa7134_nec_irq(struct saa7134_dev *dev)
{
	struct card_ir *ir = dev->remote;

	saa_clearl(SAA7134_IRQ2, SAA7134_IRQ2_INTE_GPIO18_P);
	tasklet_schedule(&ir->tlet);

	return 1;
}