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

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