1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * ImgTec IR Decoder setup for Sanyo protocol.
4 *
5 * Copyright 2012-2014 Imagination Technologies Ltd.
6 *
7 * From ir-sanyo-decoder.c:
8 *
9 * This protocol uses the NEC protocol timings. However, data is formatted as:
10 * 13 bits Custom Code
11 * 13 bits NOT(Custom Code)
12 * 8 bits Key data
13 * 8 bits NOT(Key data)
14 *
15 * According with LIRC, this protocol is used on Sanyo, Aiwa and Chinon
16 * Information for this protocol is available at the Sanyo LC7461 datasheet.
17 */
18
19 #include "img-ir-hw.h"
20
21 /* Convert Sanyo data to a scancode */
22 static int img_ir_sanyo_scancode(int len, u64 raw, u64 enabled_protocols,
23 struct img_ir_scancode_req *request)
24 {
25 unsigned int addr, addr_inv, data, data_inv;
26 /* a repeat code has no data */
27 if (!len)
28 return IMG_IR_REPEATCODE;
29 if (len != 42)
30 return -EINVAL;
31 addr = (raw >> 0) & 0x1fff;
32 addr_inv = (raw >> 13) & 0x1fff;
33 data = (raw >> 26) & 0xff;
34 data_inv = (raw >> 34) & 0xff;
35 /* Validate data */
36 if ((data_inv ^ data) != 0xff)
37 return -EINVAL;
38 /* Validate address */
39 if ((addr_inv ^ addr) != 0x1fff)
40 return -EINVAL;
41
42 /* Normal Sanyo */
43 request->protocol = RC_PROTO_SANYO;
44 request->scancode = addr << 8 | data;
45 return IMG_IR_SCANCODE;
46 }
47
48 /* Convert Sanyo scancode to Sanyo data filter */
49 static int img_ir_sanyo_filter(const struct rc_scancode_filter *in,
50 struct img_ir_filter *out, u64 protocols)
51 {
52 unsigned int addr, addr_inv, data, data_inv;
53 unsigned int addr_m, data_m;
54
55 data = in->data & 0xff;
56 data_m = in->mask & 0xff;
57 data_inv = data ^ 0xff;
58
59 if (in->data & 0xff700000)
60 return -EINVAL;
61
62 addr = (in->data >> 8) & 0x1fff;
63 addr_m = (in->mask >> 8) & 0x1fff;
64 addr_inv = addr ^ 0x1fff;
65
66 out->data = (u64)data_inv << 34 |
67 (u64)data << 26 |
68 addr_inv << 13 |
69 addr;
70 out->mask = (u64)data_m << 34 |
71 (u64)data_m << 26 |
72 addr_m << 13 |
73 addr_m;
74 return 0;
75 }
76
77 /* Sanyo decoder */
78 struct img_ir_decoder img_ir_sanyo = {
79 .type = RC_PROTO_BIT_SANYO,
80 .control = {
81 .decoden = 1,
82 .code_type = IMG_IR_CODETYPE_PULSEDIST,
83 },
84 /* main timings */
85 .unit = 562500, /* 562.5 us */
86 .timings = {
87 /* leader symbol */
88 .ldr = {
89 .pulse = { 16 /* 9ms */ },
90 .space = { 8 /* 4.5ms */ },
91 },
92 /* 0 symbol */
93 .s00 = {
94 .pulse = { 1 /* 562.5 us */ },
95 .space = { 1 /* 562.5 us */ },
96 },
97 /* 1 symbol */
98 .s01 = {
99 .pulse = { 1 /* 562.5 us */ },
100 .space = { 3 /* 1687.5 us */ },
101 },
102 /* free time */
103 .ft = {
104 .minlen = 42,
105 .maxlen = 42,
106 .ft_min = 10, /* 5.625 ms */
107 },
108 },
109 /* repeat codes */
110 .repeat = 108, /* 108 ms */
111 .rtimings = {
112 /* leader symbol */
113 .ldr = {
114 .space = { 4 /* 2.25 ms */ },
115 },
116 /* free time */
117 .ft = {
118 .minlen = 0, /* repeat code has no data */
119 .maxlen = 0,
120 },
121 },
122 /* scancode logic */
123 .scancode = img_ir_sanyo_scancode,
124 .filter = img_ir_sanyo_filter,
125 };