img-ir-sanyo.c
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/*
* ImgTec IR Decoder setup for Sanyo 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.
*
* From ir-sanyo-decoder.c:
*
* This protocol uses the NEC protocol timings. However, data is formatted as:
* 13 bits Custom Code
* 13 bits NOT(Custom Code)
* 8 bits Key data
* 8 bits NOT(Key data)
*
* According with LIRC, this protocol is used on Sanyo, Aiwa and Chinon
* Information for this protocol is available at the Sanyo LC7461 datasheet.
*/
#include "img-ir-hw.h"
/* Convert Sanyo data to a scancode */
static int img_ir_sanyo_scancode(int len, u64 raw, u64 enabled_protocols,
struct img_ir_scancode_req *request)
{
unsigned int addr, addr_inv, data, data_inv;
/* a repeat code has no data */
if (!len)
return IMG_IR_REPEATCODE;
if (len != 42)
return -EINVAL;
addr = (raw >> 0) & 0x1fff;
addr_inv = (raw >> 13) & 0x1fff;
data = (raw >> 26) & 0xff;
data_inv = (raw >> 34) & 0xff;
/* Validate data */
if ((data_inv ^ data) != 0xff)
return -EINVAL;
/* Validate address */
if ((addr_inv ^ addr) != 0x1fff)
return -EINVAL;
/* Normal Sanyo */
request->protocol = RC_TYPE_SANYO;
request->scancode = addr << 8 | data;
return IMG_IR_SCANCODE;
}
/* Convert Sanyo scancode to Sanyo data filter */
static int img_ir_sanyo_filter(const struct rc_scancode_filter *in,
struct img_ir_filter *out, u64 protocols)
{
unsigned int addr, addr_inv, data, data_inv;
unsigned int addr_m, data_m;
data = in->data & 0xff;
data_m = in->mask & 0xff;
data_inv = data ^ 0xff;
if (in->data & 0xff700000)
return -EINVAL;
addr = (in->data >> 8) & 0x1fff;
addr_m = (in->mask >> 8) & 0x1fff;
addr_inv = addr ^ 0x1fff;
out->data = (u64)data_inv << 34 |
(u64)data << 26 |
addr_inv << 13 |
addr;
out->mask = (u64)data_m << 34 |
(u64)data_m << 26 |
addr_m << 13 |
addr_m;
return 0;
}
/* Sanyo decoder */
struct img_ir_decoder img_ir_sanyo = {
.type = RC_BIT_SANYO,
.control = {
.decoden = 1,
.code_type = IMG_IR_CODETYPE_PULSEDIST,
},
/* main timings */
.unit = 562500, /* 562.5 us */
.timings = {
/* leader symbol */
.ldr = {
.pulse = { 16 /* 9ms */ },
.space = { 8 /* 4.5ms */ },
},
/* 0 symbol */
.s00 = {
.pulse = { 1 /* 562.5 us */ },
.space = { 1 /* 562.5 us */ },
},
/* 1 symbol */
.s01 = {
.pulse = { 1 /* 562.5 us */ },
.space = { 3 /* 1687.5 us */ },
},
/* free time */
.ft = {
.minlen = 42,
.maxlen = 42,
.ft_min = 10, /* 5.625 ms */
},
},
/* repeat codes */
.repeat = 108, /* 108 ms */
.rtimings = {
/* leader symbol */
.ldr = {
.space = { 4 /* 2.25 ms */ },
},
/* free time */
.ft = {
.minlen = 0, /* repeat code has no data */
.maxlen = 0,
},
},
/* scancode logic */
.scancode = img_ir_sanyo_scancode,
.filter = img_ir_sanyo_filter,
};