1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * ImgTec IR Decoder setup for JVC protocol.
4  *
5  * Copyright 2012-2014 Imagination Technologies Ltd.
6  */
7 
8 #include "img-ir-hw.h"
9 
10 /* Convert JVC data to a scancode */
11 static int img_ir_jvc_scancode(int len, u64 raw, u64 enabled_protocols,
12 			       struct img_ir_scancode_req *request)
13 {
14 	unsigned int cust, data;
15 
16 	if (len != 16)
17 		return -EINVAL;
18 
19 	cust = (raw >> 0) & 0xff;
20 	data = (raw >> 8) & 0xff;
21 
22 	request->protocol = RC_PROTO_JVC;
23 	request->scancode = cust << 8 | data;
24 	return IMG_IR_SCANCODE;
25 }
26 
27 /* Convert JVC scancode to JVC data filter */
28 static int img_ir_jvc_filter(const struct rc_scancode_filter *in,
29 			     struct img_ir_filter *out, u64 protocols)
30 {
31 	unsigned int cust, data;
32 	unsigned int cust_m, data_m;
33 
34 	cust   = (in->data >> 8) & 0xff;
35 	cust_m = (in->mask >> 8) & 0xff;
36 	data   = (in->data >> 0) & 0xff;
37 	data_m = (in->mask >> 0) & 0xff;
38 
39 	out->data = cust   | data << 8;
40 	out->mask = cust_m | data_m << 8;
41 
42 	return 0;
43 }
44 
45 /*
46  * JVC decoder
47  * See also http://www.sbprojects.com/knowledge/ir/jvc.php
48  *          http://support.jvc.com/consumer/support/documents/RemoteCodes.pdf
49  */
50 struct img_ir_decoder img_ir_jvc = {
51 	.type = RC_PROTO_BIT_JVC,
52 	.control = {
53 		.decoden = 1,
54 		.code_type = IMG_IR_CODETYPE_PULSEDIST,
55 	},
56 	/* main timings */
57 	.unit = 527500, /* 527.5 us */
58 	.timings = {
59 		/* leader symbol */
60 		.ldr = {
61 			.pulse = { 16	/* 8.44 ms */ },
62 			.space = { 8	/* 4.22 ms */ },
63 		},
64 		/* 0 symbol */
65 		.s00 = {
66 			.pulse = { 1	/* 527.5 us +-60 us */ },
67 			.space = { 1	/* 527.5 us */ },
68 		},
69 		/* 1 symbol */
70 		.s01 = {
71 			.pulse = { 1	/* 527.5 us +-60 us */ },
72 			.space = { 3	/* 1.5825 ms +-40 us */ },
73 		},
74 		/* free time */
75 		.ft = {
76 			.minlen = 16,
77 			.maxlen = 16,
78 			.ft_min = 10,	/* 5.275 ms */
79 		},
80 	},
81 	/* scancode logic */
82 	.scancode = img_ir_jvc_scancode,
83 	.filter = img_ir_jvc_filter,
84 };
85