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  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2 of the License, or (at your
   9  * option) any later version.
  10  */
  11
  12 #include "img-ir-hw.h"
  13
  14 /* Convert JVC data to a scancode */
  15 static int img_ir_jvc_scancode(int len, u64 raw, u64 enabled_protocols,
  16                                struct img_ir_scancode_req *request)
  17 {
  18         unsigned int cust, data;
  19
  20         if (len != 16)
  21                 return -EINVAL;
  22
  23         cust = (raw >> 0) & 0xff;
  24         data = (raw >> 8) & 0xff;
  25
  26         request->protocol = RC_TYPE_JVC;
  27         request->scancode = cust << 8 | data;
  28         return IMG_IR_SCANCODE;
  29 }
  30
  31 /* Convert JVC scancode to JVC data filter */
  32 static int img_ir_jvc_filter(const struct rc_scancode_filter *in,
  33                              struct img_ir_filter *out, u64 protocols)
  34 {
  35         unsigned int cust, data;
  36         unsigned int cust_m, data_m;
  37
  38         cust   = (in->data >> 8) & 0xff;
  39         cust_m = (in->mask >> 8) & 0xff;
  40         data   = (in->data >> 0) & 0xff;
  41         data_m = (in->mask >> 0) & 0xff;
  42
  43         out->data = cust   | data << 8;
  44         out->mask = cust_m | data_m << 8;
  45
  46         return 0;
  47 }
  48
  49 /*
  50  * JVC decoder
  51  * See also http://www.sbprojects.com/knowledge/ir/jvc.php
  52  *          http://support.jvc.com/consumer/support/documents/RemoteCodes.pdf
  53  */
  54 struct img_ir_decoder img_ir_jvc = {
  55         .type = RC_BIT_JVC,
  56         .control = {
  57                 .decoden = 1,
  58                 .code_type = IMG_IR_CODETYPE_PULSEDIST,
  59         },
  60         /* main timings */
  61         .unit = 527500, /* 527.5 us */
  62         .timings = {
  63                 /* leader symbol */
  64                 .ldr = {
  65                         .pulse = { 16   /* 8.44 ms */ },
  66                         .space = { 8    /* 4.22 ms */ },
  67                 },
  68                 /* 0 symbol */
  69                 .s00 = {
  70                         .pulse = { 1    /* 527.5 us +-60 us */ },
  71                         .space = { 1    /* 527.5 us */ },
  72                 },
  73                 /* 1 symbol */
  74                 .s01 = {
  75                         .pulse = { 1    /* 527.5 us +-60 us */ },
  76                         .space = { 3    /* 1.5825 ms +-40 us */ },
  77                 },
  78                 /* free time */
  79                 .ft = {
  80                         .minlen = 16,
  81                         .maxlen = 16,
  82                         .ft_min = 10,   /* 5.275 ms */
  83                 },
  84         },
  85         /* scancode logic */
  86         .scancode = img_ir_jvc_scancode,
  87         .filter = img_ir_jvc_filter,
  88 };