162 lines
3.8 KiB
C
162 lines
3.8 KiB
C
// 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,
|
|
};
|