Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 | /*
* ImgTec IR Decoder setup for Sony (SIRC) 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 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_BIT_SONY12))
return -EINVAL;
func = raw & 0x7f; /* first 7 bits */
raw >>= 7;
dev = raw & 0x1f; /* next 5 bits */
subdev = 0;
request->protocol = RC_TYPE_SONY12;
break;
case 15:
if (!(enabled_protocols & RC_BIT_SONY15))
return -EINVAL;
func = raw & 0x7f; /* first 7 bits */
raw >>= 7;
dev = raw & 0xff; /* next 8 bits */
subdev = 0;
request->protocol = RC_TYPE_SONY15;
break;
case 20:
if (!(enabled_protocols & RC_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_TYPE_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;
if (subdev & subdev_m) {
/* can't encode subdev and higher device bits */
if (dev & dev_m & 0xe0)
return -EINVAL;
/* subdevice (extended) bits only in 20 bit encoding */
if (!(protocols & RC_BIT_SONY20))
return -EINVAL;
len = 20;
dev_m &= 0x1f;
} else if (dev & dev_m & 0xe0) {
/* upper device bits only in 15 bit encoding */
if (!(protocols & RC_BIT_SONY15))
return -EINVAL;
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_BIT_SONY12 | RC_BIT_SONY15 | RC_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,
};
|