107 lines
2.4 KiB
C
107 lines
2.4 KiB
C
|
/*
|
||
|
|
* ImgTec IR Decoder setup for Sharp 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#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) & 0x1f;
|
||
|
|
cmd = (raw >> 5) & 0xff;
|
||
|
|
exp = (raw >> 13) & 0x1;
|
||
|
|
chk = (raw >> 14) & 0x1;
|
||
|
|
|
||
|
|
/* 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) & 0x1f;
|
||
|
|
addr_m = (in->mask >> 8) & 0x1f;
|
||
|
|
cmd = (in->data >> 0) & 0xff;
|
||
|
|
cmd_m = (in->mask >> 0) & 0xff;
|
||
|
|
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,
|
||
|
|
};
|