// SPDX-License-Identifier: GPL-2.0-or-later
/*
* ImgTec IR Decoder setup for Sony (SIRC) protocol.
*
* Copyright 2012-2014 Imagination Technologies Ltd.
*/
#include "img-ir-hw.h"
/* Convert Sony data to a scancode */
static int img_ir_sony_scancode(
int len, u64 raw, u64 enabled_protocols,
struct img_ir_scancode_req *request)
{
unsigned int dev, subdev, func;
switch (len) {
case 12:
if (!(enabled_protocols & RC_PROTO_BIT_SONY12))
return -EINVAL;
func = raw &
0x7f;
/* first 7 bits */
raw >>=
7;
dev = raw &
0x1f;
/* next 5 bits */
subdev =
0;
request->protocol = RC_PROTO_SONY12;
break;
case 15:
if (!(enabled_protocols & RC_PROTO_BIT_SONY15))
return -EINVAL;
func = raw &
0x7f;
/* first 7 bits */
raw >>=
7;
dev = raw &
0xff;
/* next 8 bits */
subdev =
0;
request->protocol = RC_PROTO_SONY15;
break;
case 20:
if (!(enabled_protocols & RC_PROTO_BIT_SONY20))
return -EINVAL;
func = raw &
0x7f;
/* first 7 bits */
raw >>=
7;
dev = raw &
0x1f;
/* next 5 bits */
raw >>=
5;
subdev = raw &
0xff;
/* next 8 bits */
request->protocol = RC_PROTO_SONY20;
break;
default:
return -EINVAL;
}
request->scancode = dev <<
16 | subdev <<
8 | func;
return IMG_IR_SCANCODE;
}
/* Convert NEC scancode to NEC data filter */
static int img_ir_sony_filter(
const struct rc_scancode_filter *in,
struct img_ir_filter *out, u64 protocols)
{
unsigned int dev, subdev, func;
unsigned int dev_m, subdev_m, func_m;
unsigned int len =
0;
dev = (in->data >>
16) &
0xff;
dev_m = (in->mask >>
16) &
0xff;
subdev = (in->data >>
8) &
0xff;
subdev_m = (in->mask >>
8) &
0xff;
func = (in->data >>
0) &
0x7f;
func_m = (in->mask >>
0) &
0x7f;
protocols &= RC_PROTO_BIT_SONY12 | RC_PROTO_BIT_SONY15 |
RC_PROTO_BIT_SONY20;
/*
* If only one bit is set, we were requested to do an exact
* protocol. This should be the case for wakeup filters; for
* normal filters, guess the protocol from the scancode.
*/
if (!is_power_of_2(protocols)) {
if (subdev & subdev_m)
protocols = RC_PROTO_BIT_SONY20;
else if (dev & dev_m &
0xe0)
protocols = RC_PROTO_BIT_SONY15;
else
protocols = RC_PROTO_BIT_SONY12;
}
if (protocols == RC_PROTO_BIT_SONY20) {
/* can't encode subdev and higher device bits */
if (dev & dev_m &
0xe0)
return -EINVAL;
len =
20;
dev_m &=
0x1f;
}
else if (protocols == RC_PROTO_BIT_SONY15) {
len =
15;
subdev_m =
0;
}
else {
/*
* The hardware mask cannot distinguish high device bits and low
* extended bits, so logically AND those bits of the masks
* together.
*/
subdev_m &= (dev_m >>
5) |
0xf8;
dev_m &=
0x1f;
}
/* ensure there aren't any bits straying between fields */
dev &= dev_m;
subdev &= subdev_m;
/* write the hardware filter */
out->data = func |
dev <<
7 |
subdev <<
15;
out->mask = func_m |
dev_m <<
7 |
subdev_m <<
15;
if (len) {
out->minlen = len;
out->maxlen = len;
}
return 0;
}
/*
* Sony SIRC decoder
* See also http://www.sbprojects.com/knowledge/ir/sirc.php
* http://picprojects.org.uk/projects/sirc/sonysirc.pdf
*/
struct img_ir_decoder img_ir_sony = {
.type = RC_PROTO_BIT_SONY12 | RC_PROTO_BIT_SONY15 | RC_PROTO_BIT_SONY20,
.control = {
.decoden =
1,
.code_type = IMG_IR_CODETYPE_PULSELEN,
},
/* main timings */
.unit =
600000,
/* 600 us */
.timings = {
/* leader symbol */
.ldr = {
.pulse = {
4 /* 2.4 ms */ },
.space = {
1 /* 600 us */ },
},
/* 0 symbol */
.s00 = {
.pulse = {
1 /* 600 us */ },
.space = {
1 /* 600 us */ },
},
/* 1 symbol */
.s01 = {
.pulse = {
2 /* 1.2 ms */ },
.space = {
1 /* 600 us */ },
},
/* free time */
.ft = {
.minlen =
12,
.maxlen =
20,
.ft_min =
10,
/* 6 ms */
},
},
/* scancode logic */
.scancode = img_ir_sony_scancode,
.filter = img_ir_sony_filter,
};