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,
};
|
