img-ir-jvc.c
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/*
* ImgTec IR Decoder setup for JVC protocol.
*
* Copyright 2012-2014 Imagination Technologies Ltd.
*
* 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.
*/
#include "img-ir-hw.h"
/* Convert JVC data to a scancode */
static int img_ir_jvc_scancode(int len, u64 raw, u64 enabled_protocols,
struct img_ir_scancode_req *request)
{
unsigned int cust, data;
if (len != 16)
return -EINVAL;
cust = (raw >> 0) & 0xff;
data = (raw >> 8) & 0xff;
request->protocol = RC_TYPE_JVC;
request->scancode = cust << 8 | data;
return IMG_IR_SCANCODE;
}
/* Convert JVC scancode to JVC data filter */
static int img_ir_jvc_filter(const struct rc_scancode_filter *in,
struct img_ir_filter *out, u64 protocols)
{
unsigned int cust, data;
unsigned int cust_m, data_m;
cust = (in->data >> 8) & 0xff;
cust_m = (in->mask >> 8) & 0xff;
data = (in->data >> 0) & 0xff;
data_m = (in->mask >> 0) & 0xff;
out->data = cust | data << 8;
out->mask = cust_m | data_m << 8;
return 0;
}
/*
* JVC decoder
* See also http://www.sbprojects.com/knowledge/ir/jvc.php
* http://support.jvc.com/consumer/support/documents/RemoteCodes.pdf
*/
struct img_ir_decoder img_ir_jvc = {
.type = RC_BIT_JVC,
.control = {
.decoden = 1,
.code_type = IMG_IR_CODETYPE_PULSEDIST,
},
/* main timings */
.unit = 527500, /* 527.5 us */
.timings = {
/* leader symbol */
.ldr = {
.pulse = { 16 /* 8.44 ms */ },
.space = { 8 /* 4.22 ms */ },
},
/* 0 symbol */
.s00 = {
.pulse = { 1 /* 527.5 us +-60 us */ },
.space = { 1 /* 527.5 us */ },
},
/* 1 symbol */
.s01 = {
.pulse = { 1 /* 527.5 us +-60 us */ },
.space = { 3 /* 1.5825 ms +-40 us */ },
},
/* free time */
.ft = {
.minlen = 16,
.maxlen = 16,
.ft_min = 10, /* 5.275 ms */
},
},
/* scancode logic */
.scancode = img_ir_jvc_scancode,
.filter = img_ir_jvc_filter,
};