2 * ImgTec IR Decoder setup for Sharp protocol.
4 * Copyright 2012-2014 Imagination Technologies Ltd.
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.
12 #include "img-ir-hw.h"
14 /* Convert Sharp data to a scancode */
15 static int img_ir_sharp_scancode(int len, u64 raw, u64 enabled_protocols,
16 struct img_ir_scancode_req *request)
18 unsigned int addr, cmd, exp, chk;
23 addr = (raw >> 0) & 0x1f;
24 cmd = (raw >> 5) & 0xff;
25 exp = (raw >> 13) & 0x1;
26 chk = (raw >> 14) & 0x1;
32 /* probably the second half of the message */
35 request->protocol = RC_PROTO_SHARP;
36 request->scancode = addr << 8 | cmd;
37 return IMG_IR_SCANCODE;
40 /* Convert Sharp scancode to Sharp data filter */
41 static int img_ir_sharp_filter(const struct rc_scancode_filter *in,
42 struct img_ir_filter *out, u64 protocols)
44 unsigned int addr, cmd, exp = 0, chk = 0;
45 unsigned int addr_m, cmd_m, exp_m = 0, chk_m = 0;
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;
52 /* if filtering commands, we can only match the first part */
73 * See also http://www.sbprojects.com/knowledge/ir/sharp.php
75 struct img_ir_decoder img_ir_sharp = {
76 .type = RC_PROTO_BIT_SHARP,
80 .code_type = IMG_IR_CODETYPE_PULSEDIST,
84 .tolerance = 20, /* 20% */
88 .pulse = { 320 /* 320 us */ },
89 .space = { 680 /* 1 ms period */ },
93 .pulse = { 320 /* 320 us */ },
94 .space = { 1680 /* 2 ms period */ },
100 .ft_min = 5000, /* 5 ms */
104 .scancode = img_ir_sharp_scancode,
105 .filter = img_ir_sharp_filter,