blob: fe5acc4f030e13c33ef3ae45cdff1ccbc0ec05ca [file] [log] [blame]
James Hogan3c113052014-02-28 20:28:59 -03001/*
2 * ImgTec IR Decoder setup for Sharp protocol.
3 *
4 * Copyright 2012-2014 Imagination Technologies Ltd.
James Hogan2ac6f632014-03-26 18:08:33 -03005 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
James Hogan3c113052014-02-28 20:28:59 -030010 */
11
12#include "img-ir-hw.h"
13
14/* Convert Sharp data to a scancode */
Sifan Naeemab93ce02014-12-11 17:06:22 -030015static int img_ir_sharp_scancode(int len, u64 raw, u64 enabled_protocols,
16 struct img_ir_scancode_req *request)
James Hogan3c113052014-02-28 20:28:59 -030017{
18 unsigned int addr, cmd, exp, chk;
19
20 if (len != 15)
21 return -EINVAL;
22
23 addr = (raw >> 0) & 0x1f;
24 cmd = (raw >> 5) & 0xff;
25 exp = (raw >> 13) & 0x1;
26 chk = (raw >> 14) & 0x1;
27
28 /* validate data */
29 if (!exp)
30 return -EINVAL;
31 if (chk)
32 /* probably the second half of the message */
33 return -EINVAL;
34
Sifan Naeemab93ce02014-12-11 17:06:22 -030035 request->protocol = RC_TYPE_SHARP;
36 request->scancode = addr << 8 | cmd;
James Hogan3c113052014-02-28 20:28:59 -030037 return IMG_IR_SCANCODE;
38}
39
40/* Convert Sharp scancode to Sharp data filter */
41static int img_ir_sharp_filter(const struct rc_scancode_filter *in,
42 struct img_ir_filter *out, u64 protocols)
43{
44 unsigned int addr, cmd, exp = 0, chk = 0;
45 unsigned int addr_m, cmd_m, exp_m = 0, chk_m = 0;
46
47 addr = (in->data >> 8) & 0x1f;
48 addr_m = (in->mask >> 8) & 0x1f;
49 cmd = (in->data >> 0) & 0xff;
50 cmd_m = (in->mask >> 0) & 0xff;
51 if (cmd_m) {
52 /* if filtering commands, we can only match the first part */
53 exp = 1;
54 exp_m = 1;
55 chk = 0;
56 chk_m = 1;
57 }
58
59 out->data = addr |
60 cmd << 5 |
61 exp << 13 |
62 chk << 14;
63 out->mask = addr_m |
64 cmd_m << 5 |
65 exp_m << 13 |
66 chk_m << 14;
67
68 return 0;
69}
70
71/*
72 * Sharp decoder
73 * See also http://www.sbprojects.com/knowledge/ir/sharp.php
74 */
75struct img_ir_decoder img_ir_sharp = {
76 .type = RC_BIT_SHARP,
77 .control = {
78 .decoden = 0,
79 .decodend2 = 1,
80 .code_type = IMG_IR_CODETYPE_PULSEDIST,
81 .d1validsel = 1,
82 },
83 /* main timings */
84 .tolerance = 20, /* 20% */
85 .timings = {
86 /* 0 symbol */
87 .s10 = {
88 .pulse = { 320 /* 320 us */ },
89 .space = { 680 /* 1 ms period */ },
90 },
91 /* 1 symbol */
92 .s11 = {
93 .pulse = { 320 /* 320 us */ },
94 .space = { 1680 /* 2 ms period */ },
95 },
96 /* free time */
97 .ft = {
98 .minlen = 15,
99 .maxlen = 15,
100 .ft_min = 5000, /* 5 ms */
101 },
102 },
103 /* scancode logic */
104 .scancode = img_ir_sharp_scancode,
105 .filter = img_ir_sharp_filter,
106};