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 */
  11 static 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 */
  28 static 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  */
  50 struct 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 };