tools/testing/selftests/bpf/progs/test_lirc_mode2_kern.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // test ir decoder
   3 //
   4 // Copyright (C) 2018 Sean Young <sean@mess.org>
   5
   6 #include <linux/bpf.h>
   7 #include <linux/lirc.h>
   8 #include "bpf_helpers.h"
   9
  10 SEC("lirc_mode2")
  11 int bpf_decoder(unsigned int *sample)
  12 {
  13         if (LIRC_IS_PULSE(*sample)) {
  14                 unsigned int duration = LIRC_VALUE(*sample);
  15
  16                 if (duration & 0x10000)
  17                         bpf_rc_keydown(sample, 0x40, duration & 0xffff, 0);
  18                 if (duration & 0x20000)
  19                         bpf_rc_pointer_rel(sample, (duration >> 8) & 0xff,
  20                                            duration & 0xff);
  21         }
  22
  23         return 0;
  24 }
  25
  26 char _license[] SEC("license") = "GPL";