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102 lines
2.2 KiB
102 lines
2.2 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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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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#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, u64 enabled_protocols, |
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struct img_ir_scancode_req *request) |
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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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request->protocol = RC_PROTO_SHARP; |
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request->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_PROTO_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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