1 /*
2  * ImgTec IR Decoder setup for JVC protocol.
3  *
4  * Copyright 2012-2014 Imagination Technologies Ltd.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by the
8  * Free Software Foundation; either version 2 of the License, or (at your
9  * option) any later version.
10  */
11 
12 #include "img-ir-hw.h"
13 
14 /* Convert JVC data to a scancode */
15 static int img_ir_jvc_scancode(int len, u64 raw, enum rc_type *protocol,
16 			       u32 *scancode, u64 enabled_protocols)
17 {
18 	unsigned int cust, data;
19 
20 	if (len != 16)
21 		return -EINVAL;
22 
23 	cust = (raw >> 0) & 0xff;
24 	data = (raw >> 8) & 0xff;
25 
26 	*protocol = RC_TYPE_JVC;
27 	*scancode = cust << 8 | data;
28 	return IMG_IR_SCANCODE;
29 }
30 
31 /* Convert JVC scancode to JVC data filter */
32 static int img_ir_jvc_filter(const struct rc_scancode_filter *in,
33 			     struct img_ir_filter *out, u64 protocols)
34 {
35 	unsigned int cust, data;
36 	unsigned int cust_m, data_m;
37 
38 	cust   = (in->data >> 8) & 0xff;
39 	cust_m = (in->mask >> 8) & 0xff;
40 	data   = (in->data >> 0) & 0xff;
41 	data_m = (in->mask >> 0) & 0xff;
42 
43 	out->data = cust   | data << 8;
44 	out->mask = cust_m | data_m << 8;
45 
46 	return 0;
47 }
48 
49 /*
50  * JVC decoder
51  * See also http://www.sbprojects.com/knowledge/ir/jvc.php
52  *          http://support.jvc.com/consumer/support/documents/RemoteCodes.pdf
53  */
54 struct img_ir_decoder img_ir_jvc = {
55 	.type = RC_BIT_JVC,
56 	.control = {
57 		.decoden = 1,
58 		.code_type = IMG_IR_CODETYPE_PULSEDIST,
59 	},
60 	/* main timings */
61 	.unit = 527500, /* 527.5 us */
62 	.timings = {
63 		/* leader symbol */
64 		.ldr = {
65 			.pulse = { 16	/* 8.44 ms */ },
66 			.space = { 8	/* 4.22 ms */ },
67 		},
68 		/* 0 symbol */
69 		.s00 = {
70 			.pulse = { 1	/* 527.5 us +-60 us */ },
71 			.space = { 1	/* 527.5 us */ },
72 		},
73 		/* 1 symbol */
74 		.s01 = {
75 			.pulse = { 1	/* 527.5 us +-60 us */ },
76 			.space = { 3	/* 1.5825 ms +-40 us */ },
77 		},
78 		/* free time */
79 		.ft = {
80 			.minlen = 16,
81 			.maxlen = 16,
82 			.ft_min = 10,	/* 5.275 ms */
83 		},
84 	},
85 	/* scancode logic */
86 	.scancode = img_ir_jvc_scancode,
87 	.filter = img_ir_jvc_filter,
88 };
89