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2874c5fd28
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
84 lines
1.7 KiB
C
84 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* ImgTec IR Decoder setup for Philips RC-5 protocol.
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*
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* Copyright 2012-2014 Imagination Technologies Ltd.
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*/
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#include "img-ir-hw.h"
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/* Convert RC5 data to a scancode */
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static int img_ir_rc5_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, cmd, tgl, start;
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/* Quirk in the decoder shifts everything by 2 to the left. */
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raw >>= 2;
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start = (raw >> 13) & 0x01;
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tgl = (raw >> 11) & 0x01;
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addr = (raw >> 6) & 0x1f;
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cmd = raw & 0x3f;
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/*
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* 12th bit is used to extend the command in extended RC5 and has
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* no effect on standard RC5.
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*/
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cmd += ((raw >> 12) & 0x01) ? 0 : 0x40;
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if (!start)
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return -EINVAL;
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request->protocol = RC_PROTO_RC5;
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request->scancode = addr << 8 | cmd;
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request->toggle = tgl;
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return IMG_IR_SCANCODE;
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}
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/* Convert RC5 scancode to RC5 data filter */
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static int img_ir_rc5_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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/* Not supported by the hw. */
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return -EINVAL;
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}
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/*
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* RC-5 decoder
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* see http://www.sbprojects.com/knowledge/ir/rc5.php
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*/
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struct img_ir_decoder img_ir_rc5 = {
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.type = RC_PROTO_BIT_RC5,
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.control = {
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.bitoriend2 = 1,
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.code_type = IMG_IR_CODETYPE_BIPHASE,
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.decodend2 = 1,
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},
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/* main timings */
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.tolerance = 16,
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.unit = 888888, /* 1/36k*32=888.888microseconds */
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.timings = {
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/* 10 symbol */
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.s10 = {
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.pulse = { 1 },
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.space = { 1 },
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},
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/* 11 symbol */
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.s11 = {
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.pulse = { 1 },
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.space = { 1 },
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},
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/* free time */
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.ft = {
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.minlen = 14,
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.maxlen = 14,
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.ft_min = 5,
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},
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},
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/* scancode logic */
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.scancode = img_ir_rc5_scancode,
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.filter = img_ir_rc5_filter,
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};
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