// SPDX-License-Identifier: GPL-2.0-or-later
/*
* ImgTec IR Decoder setup for Sharp protocol .
*
* Copyright 2012 - 2014 Imagination Technologies Ltd .
*/
#include "img-ir-hw.h"
/* Convert Sharp data to a scancode */
static int img_ir_sharp_scancode(int len, u64 raw, u64 enabled_protocols,
struct img_ir_scancode_req *request)
{
unsigned int addr, cmd, exp, chk;
if (len != 15 )
return -EINVAL;
addr = (raw >> 0 ) & 0 x1f;
cmd = (raw >> 5 ) & 0 xff;
exp = (raw >> 13 ) & 0 x1;
chk = (raw >> 14 ) & 0 x1;
/* validate data */
if (!exp)
return -EINVAL;
if (chk)
/* probably the second half of the message */
return -EINVAL;
request->protocol = RC_PROTO_SHARP;
request->scancode = addr << 8 | cmd;
return IMG_IR_SCANCODE;
}
/* Convert Sharp scancode to Sharp data filter */
static int img_ir_sharp_filter(const struct rc_scancode_filter *in,
struct img_ir_filter *out, u64 protocols)
{
unsigned int addr, cmd, exp = 0 , chk = 0 ;
unsigned int addr_m, cmd_m, exp_m = 0 , chk_m = 0 ;
addr = (in->data >> 8 ) & 0 x1f;
addr_m = (in->mask >> 8 ) & 0 x1f;
cmd = (in->data >> 0 ) & 0 xff;
cmd_m = (in->mask >> 0 ) & 0 xff;
if (cmd_m) {
/* if filtering commands, we can only match the first part */
exp = 1 ;
exp_m = 1 ;
chk = 0 ;
chk_m = 1 ;
}
out->data = addr |
cmd << 5 |
exp << 13 |
chk << 14 ;
out->mask = addr_m |
cmd_m << 5 |
exp_m << 13 |
chk_m << 14 ;
return 0 ;
}
/*
* Sharp decoder
* See also http : //www.sbprojects.com/knowledge/ir/sharp.php
*/
struct img_ir_decoder img_ir_sharp = {
.type = RC_PROTO_BIT_SHARP,
.control = {
.decoden = 0 ,
.decodend2 = 1 ,
.code_type = IMG_IR_CODETYPE_PULSEDIST,
.d1validsel = 1 ,
},
/* main timings */
.tolerance = 20 , /* 20% */
.timings = {
/* 0 symbol */
.s10 = {
.pulse = { 320 /* 320 us */ },
.space = { 680 /* 1 ms period */ },
},
/* 1 symbol */
.s11 = {
.pulse = { 320 /* 320 us */ },
.space = { 1680 /* 2 ms period */ },
},
/* free time */
.ft = {
.minlen = 15 ,
.maxlen = 15 ,
.ft_min = 5000 , /* 5 ms */
},
},
/* scancode logic */
.scancode = img_ir_sharp_scancode,
.filter = img_ir_sharp_filter,
};
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