forked from Minki/linux
120703f9eb
Right now the protocol information is not preserved, rc-core gets handed a scancode but has no idea which protocol it corresponds to. This patch (which required reading through the source/keymap for all drivers, not fun) makes the protocol information explicit which is important documentation and makes it easier to e.g. support multiple protocols with one decoder (think rc5 and rc-streamzap). The information isn't used yet so there should be no functional changes. [m.chehab@samsung.com: rebased, added cxusb and removed bad whitespacing] Signed-off-by: David Härdeman <david@hardeman.nu> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
107 lines
2.3 KiB
C
107 lines
2.3 KiB
C
/*
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* ImgTec IR Decoder setup for Sharp protocol.
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*
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* Copyright 2012-2014 Imagination Technologies Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include "img-ir-hw.h"
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/* Convert Sharp data to a scancode */
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static int img_ir_sharp_scancode(int len, u64 raw, enum rc_type *protocol,
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u32 *scancode, u64 enabled_protocols)
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{
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unsigned int addr, cmd, exp, chk;
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if (len != 15)
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return -EINVAL;
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addr = (raw >> 0) & 0x1f;
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cmd = (raw >> 5) & 0xff;
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exp = (raw >> 13) & 0x1;
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chk = (raw >> 14) & 0x1;
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/* validate data */
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if (!exp)
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return -EINVAL;
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if (chk)
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/* probably the second half of the message */
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return -EINVAL;
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*protocol = RC_TYPE_SHARP;
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*scancode = addr << 8 | cmd;
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return IMG_IR_SCANCODE;
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}
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/* Convert Sharp scancode to Sharp data filter */
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static int img_ir_sharp_filter(const struct rc_scancode_filter *in,
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struct img_ir_filter *out, u64 protocols)
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{
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unsigned int addr, cmd, exp = 0, chk = 0;
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unsigned int addr_m, cmd_m, exp_m = 0, chk_m = 0;
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addr = (in->data >> 8) & 0x1f;
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addr_m = (in->mask >> 8) & 0x1f;
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cmd = (in->data >> 0) & 0xff;
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cmd_m = (in->mask >> 0) & 0xff;
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if (cmd_m) {
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/* if filtering commands, we can only match the first part */
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exp = 1;
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exp_m = 1;
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chk = 0;
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chk_m = 1;
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}
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out->data = addr |
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cmd << 5 |
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exp << 13 |
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chk << 14;
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out->mask = addr_m |
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cmd_m << 5 |
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exp_m << 13 |
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chk_m << 14;
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return 0;
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}
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/*
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* Sharp decoder
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* See also http://www.sbprojects.com/knowledge/ir/sharp.php
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*/
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struct img_ir_decoder img_ir_sharp = {
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.type = RC_BIT_SHARP,
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.control = {
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.decoden = 0,
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.decodend2 = 1,
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.code_type = IMG_IR_CODETYPE_PULSEDIST,
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.d1validsel = 1,
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},
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/* main timings */
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.tolerance = 20, /* 20% */
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.timings = {
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/* 0 symbol */
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.s10 = {
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.pulse = { 320 /* 320 us */ },
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.space = { 680 /* 1 ms period */ },
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},
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/* 1 symbol */
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.s11 = {
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.pulse = { 320 /* 320 us */ },
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.space = { 1680 /* 2 ms period */ },
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},
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/* free time */
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.ft = {
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.minlen = 15,
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.maxlen = 15,
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.ft_min = 5000, /* 5 ms */
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},
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},
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/* scancode logic */
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.scancode = img_ir_sharp_scancode,
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.filter = img_ir_sharp_filter,
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};
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