/*
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* ImgTec IR Decoder setup for Sanyo protocol.
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*
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* Copyright 2012-2014 Imagination Technologies Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* From ir-sanyo-decoder.c:
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*
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* This protocol uses the NEC protocol timings. However, data is formatted as:
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* 13 bits Custom Code
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* 13 bits NOT(Custom Code)
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* 8 bits Key data
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* 8 bits NOT(Key data)
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*
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* According with LIRC, this protocol is used on Sanyo, Aiwa and Chinon
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* Information for this protocol is available at the Sanyo LC7461 datasheet.
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*/
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#include "img-ir-hw.h"
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/* Convert Sanyo data to a scancode */
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static int img_ir_sanyo_scancode(int len, u64 raw, u64 enabled_protocols,
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struct img_ir_scancode_req *request)
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{
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unsigned int addr, addr_inv, data, data_inv;
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/* a repeat code has no data */
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if (!len)
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return IMG_IR_REPEATCODE;
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if (len != 42)
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return -EINVAL;
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addr = (raw >> 0) & 0x1fff;
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addr_inv = (raw >> 13) & 0x1fff;
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data = (raw >> 26) & 0xff;
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data_inv = (raw >> 34) & 0xff;
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/* Validate data */
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if ((data_inv ^ data) != 0xff)
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return -EINVAL;
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/* Validate address */
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if ((addr_inv ^ addr) != 0x1fff)
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return -EINVAL;
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/* Normal Sanyo */
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request->protocol = RC_PROTO_SANYO;
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request->scancode = addr << 8 | data;
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return IMG_IR_SCANCODE;
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}
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/* Convert Sanyo scancode to Sanyo data filter */
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static int img_ir_sanyo_filter(const struct rc_scancode_filter *in,
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struct img_ir_filter *out, u64 protocols)
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{
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unsigned int addr, addr_inv, data, data_inv;
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unsigned int addr_m, data_m;
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data = in->data & 0xff;
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data_m = in->mask & 0xff;
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data_inv = data ^ 0xff;
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if (in->data & 0xff700000)
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return -EINVAL;
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addr = (in->data >> 8) & 0x1fff;
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addr_m = (in->mask >> 8) & 0x1fff;
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addr_inv = addr ^ 0x1fff;
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out->data = (u64)data_inv << 34 |
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(u64)data << 26 |
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addr_inv << 13 |
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addr;
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out->mask = (u64)data_m << 34 |
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(u64)data_m << 26 |
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addr_m << 13 |
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addr_m;
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return 0;
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}
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/* Sanyo decoder */
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struct img_ir_decoder img_ir_sanyo = {
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.type = RC_PROTO_BIT_SANYO,
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.control = {
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.decoden = 1,
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.code_type = IMG_IR_CODETYPE_PULSEDIST,
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},
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/* main timings */
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.unit = 562500, /* 562.5 us */
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.timings = {
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/* leader symbol */
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.ldr = {
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.pulse = { 16 /* 9ms */ },
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.space = { 8 /* 4.5ms */ },
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},
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/* 0 symbol */
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.s00 = {
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.pulse = { 1 /* 562.5 us */ },
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.space = { 1 /* 562.5 us */ },
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},
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/* 1 symbol */
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.s01 = {
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.pulse = { 1 /* 562.5 us */ },
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.space = { 3 /* 1687.5 us */ },
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},
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/* free time */
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.ft = {
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.minlen = 42,
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.maxlen = 42,
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.ft_min = 10, /* 5.625 ms */
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},
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},
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/* repeat codes */
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.repeat = 108, /* 108 ms */
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.rtimings = {
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/* leader symbol */
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.ldr = {
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.space = { 4 /* 2.25 ms */ },
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},
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/* free time */
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.ft = {
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.minlen = 0, /* repeat code has no data */
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.maxlen = 0,
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},
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},
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/* scancode logic */
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.scancode = img_ir_sanyo_scancode,
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.filter = img_ir_sanyo_filter,
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};
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