1 /*
2  * ImgTec IR Decoder setup for JVC protocol.
3  *
4  * Copyright 2012-2014 Imagination Technologies Ltd.
5  */
6 
7 #include "img-ir-hw.h"
8 
9 /* Convert JVC data to a scancode */
10 static int img_ir_jvc_scancode(int len, u64 raw, int *scancode, u64 protocols)
11 {
12 	unsigned int cust, data;
13 
14 	if (len != 16)
15 		return -EINVAL;
16 
17 	cust = (raw >> 0) & 0xff;
18 	data = (raw >> 8) & 0xff;
19 
20 	*scancode = cust << 8 | data;
21 	return IMG_IR_SCANCODE;
22 }
23 
24 /* Convert JVC scancode to JVC data filter */
25 static int img_ir_jvc_filter(const struct rc_scancode_filter *in,
26 			     struct img_ir_filter *out, u64 protocols)
27 {
28 	unsigned int cust, data;
29 	unsigned int cust_m, data_m;
30 
31 	cust   = (in->data >> 8) & 0xff;
32 	cust_m = (in->mask >> 8) & 0xff;
33 	data   = (in->data >> 0) & 0xff;
34 	data_m = (in->mask >> 0) & 0xff;
35 
36 	out->data = cust   | data << 8;
37 	out->mask = cust_m | data_m << 8;
38 
39 	return 0;
40 }
41 
42 /*
43  * JVC decoder
44  * See also http://www.sbprojects.com/knowledge/ir/jvc.php
45  *          http://support.jvc.com/consumer/support/documents/RemoteCodes.pdf
46  */
47 struct img_ir_decoder img_ir_jvc = {
48 	.type = RC_BIT_JVC,
49 	.control = {
50 		.decoden = 1,
51 		.code_type = IMG_IR_CODETYPE_PULSEDIST,
52 	},
53 	/* main timings */
54 	.unit = 527500, /* 527.5 us */
55 	.timings = {
56 		/* leader symbol */
57 		.ldr = {
58 			.pulse = { 16	/* 8.44 ms */ },
59 			.space = { 8	/* 4.22 ms */ },
60 		},
61 		/* 0 symbol */
62 		.s00 = {
63 			.pulse = { 1	/* 527.5 us +-60 us */ },
64 			.space = { 1	/* 527.5 us */ },
65 		},
66 		/* 1 symbol */
67 		.s01 = {
68 			.pulse = { 1	/* 527.5 us +-60 us */ },
69 			.space = { 3	/* 1.5825 ms +-40 us */ },
70 		},
71 		/* free time */
72 		.ft = {
73 			.minlen = 16,
74 			.maxlen = 16,
75 			.ft_min = 10,	/* 5.275 ms */
76 		},
77 	},
78 	/* scancode logic */
79 	.scancode = img_ir_jvc_scancode,
80 	.filter = img_ir_jvc_filter,
81 };
82