LXR linux/drivers/media/rc/img-ir/img-ir-jvc.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * ImgTec IR Decoder setup for JVC protocol.
   4 *
   5 * Copyright 2012-2014 Imagination Technologies Ltd.
   6 */
   7
   8#include "img-ir-hw.h"
   9
  10/* Convert JVC data to a scancode */
  11static int img_ir_jvc_scancode(int len, u64 raw, u64 enabled_protocols,
  12                               struct img_ir_scancode_req *request)
  13{
  14        unsigned int cust, data;
  15
  16        if (len != 16)
  17                return -EINVAL;
  18
  19        cust = (raw >> 0) & 0xff;
  20        data = (raw >> 8) & 0xff;
  21
  22        request->protocol = RC_PROTO_JVC;
  23        request->scancode = cust << 8 | data;
  24        return IMG_IR_SCANCODE;
  25}
  26
  27/* Convert JVC scancode to JVC data filter */
  28static int img_ir_jvc_filter(const struct rc_scancode_filter *in,
  29                             struct img_ir_filter *out, u64 protocols)
  30{
  31        unsigned int cust, data;
  32        unsigned int cust_m, data_m;
  33
  34        cust   = (in->data >> 8) & 0xff;
  35        cust_m = (in->mask >> 8) & 0xff;
  36        data   = (in->data >> 0) & 0xff;
  37        data_m = (in->mask >> 0) & 0xff;
  38
  39        out->data = cust   | data << 8;
  40        out->mask = cust_m | data_m << 8;
  41
  42        return 0;
  43}
  44
  45/*
  46 * JVC decoder
  47 * See also http://www.sbprojects.com/knowledge/ir/jvc.php
  48 *          http://support.jvc.com/consumer/support/documents/RemoteCodes.pdf
  49 */
  50struct img_ir_decoder img_ir_jvc = {
  51        .type = RC_PROTO_BIT_JVC,
  52        .control = {
  53                .decoden = 1,
  54                .code_type = IMG_IR_CODETYPE_PULSEDIST,
  55        },
  56        /* main timings */
  57        .unit = 527500, /* 527.5 us */
  58        .timings = {
  59                /* leader symbol */
  60                .ldr = {
  61                        .pulse = { 16   /* 8.44 ms */ },
  62                        .space = { 8    /* 4.22 ms */ },
  63                },
  64                /* 0 symbol */
  65                .s00 = {
  66                        .pulse = { 1    /* 527.5 us +-60 us */ },
  67                        .space = { 1    /* 527.5 us */ },
  68                },
  69                /* 1 symbol */
  70                .s01 = {
  71                        .pulse = { 1    /* 527.5 us +-60 us */ },
  72                        .space = { 3    /* 1.5825 ms +-40 us */ },
  73                },
  74                /* free time */
  75                .ft = {
  76                        .minlen = 16,
  77                        .maxlen = 16,
  78                        .ft_min = 10,   /* 5.275 ms */
  79                },
  80        },
  81        /* scancode logic */
  82        .scancode = img_ir_jvc_scancode,
  83        .filter = img_ir_jvc_filter,
  84};
  85