cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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img-ir-sanyo.c (2898B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * ImgTec IR Decoder setup for Sanyo protocol.
      4 *
      5 * Copyright 2012-2014 Imagination Technologies Ltd.
      6 *
      7 * From ir-sanyo-decoder.c:
      8 *
      9 * This protocol uses the NEC protocol timings. However, data is formatted as:
     10 *	13 bits Custom Code
     11 *	13 bits NOT(Custom Code)
     12 *	8 bits Key data
     13 *	8 bits NOT(Key data)
     14 *
     15 * According with LIRC, this protocol is used on Sanyo, Aiwa and Chinon
     16 * Information for this protocol is available at the Sanyo LC7461 datasheet.
     17 */
     18
     19#include "img-ir-hw.h"
     20
     21/* Convert Sanyo data to a scancode */
     22static int img_ir_sanyo_scancode(int len, u64 raw, u64 enabled_protocols,
     23				 struct img_ir_scancode_req *request)
     24{
     25	unsigned int addr, addr_inv, data, data_inv;
     26	/* a repeat code has no data */
     27	if (!len)
     28		return IMG_IR_REPEATCODE;
     29	if (len != 42)
     30		return -EINVAL;
     31	addr     = (raw >>  0) & 0x1fff;
     32	addr_inv = (raw >> 13) & 0x1fff;
     33	data     = (raw >> 26) & 0xff;
     34	data_inv = (raw >> 34) & 0xff;
     35	/* Validate data */
     36	if ((data_inv ^ data) != 0xff)
     37		return -EINVAL;
     38	/* Validate address */
     39	if ((addr_inv ^ addr) != 0x1fff)
     40		return -EINVAL;
     41
     42	/* Normal Sanyo */
     43	request->protocol = RC_PROTO_SANYO;
     44	request->scancode = addr << 8 | data;
     45	return IMG_IR_SCANCODE;
     46}
     47
     48/* Convert Sanyo scancode to Sanyo data filter */
     49static int img_ir_sanyo_filter(const struct rc_scancode_filter *in,
     50			       struct img_ir_filter *out, u64 protocols)
     51{
     52	unsigned int addr, addr_inv, data, data_inv;
     53	unsigned int addr_m, data_m;
     54
     55	data = in->data & 0xff;
     56	data_m = in->mask & 0xff;
     57	data_inv = data ^ 0xff;
     58
     59	if (in->data & 0xff700000)
     60		return -EINVAL;
     61
     62	addr       = (in->data >> 8) & 0x1fff;
     63	addr_m     = (in->mask >> 8) & 0x1fff;
     64	addr_inv   = addr ^ 0x1fff;
     65
     66	out->data = (u64)data_inv << 34 |
     67		    (u64)data     << 26 |
     68			 addr_inv << 13 |
     69			 addr;
     70	out->mask = (u64)data_m << 34 |
     71		    (u64)data_m << 26 |
     72			 addr_m << 13 |
     73			 addr_m;
     74	return 0;
     75}
     76
     77/* Sanyo decoder */
     78struct img_ir_decoder img_ir_sanyo = {
     79	.type = RC_PROTO_BIT_SANYO,
     80	.control = {
     81		.decoden = 1,
     82		.code_type = IMG_IR_CODETYPE_PULSEDIST,
     83	},
     84	/* main timings */
     85	.unit = 562500, /* 562.5 us */
     86	.timings = {
     87		/* leader symbol */
     88		.ldr = {
     89			.pulse = { 16	/* 9ms */ },
     90			.space = { 8	/* 4.5ms */ },
     91		},
     92		/* 0 symbol */
     93		.s00 = {
     94			.pulse = { 1	/* 562.5 us */ },
     95			.space = { 1	/* 562.5 us */ },
     96		},
     97		/* 1 symbol */
     98		.s01 = {
     99			.pulse = { 1	/* 562.5 us */ },
    100			.space = { 3	/* 1687.5 us */ },
    101		},
    102		/* free time */
    103		.ft = {
    104			.minlen = 42,
    105			.maxlen = 42,
    106			.ft_min = 10,	/* 5.625 ms */
    107		},
    108	},
    109	/* repeat codes */
    110	.repeat = 108,			/* 108 ms */
    111	.rtimings = {
    112		/* leader symbol */
    113		.ldr = {
    114			.space = { 4	/* 2.25 ms */ },
    115		},
    116		/* free time */
    117		.ft = {
    118			.minlen = 0,	/* repeat code has no data */
    119			.maxlen = 0,
    120		},
    121	},
    122	/* scancode logic */
    123	.scancode = img_ir_sanyo_scancode,
    124	.filter = img_ir_sanyo_filter,
    125};