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

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/progs/test_lirc_mode2_kern.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/test_lirc_mode2_kern.c
Extension
.c
Size
565 bytes
Lines
27
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
// test ir decoder
//
// Copyright (C) 2018 Sean Young <sean@mess.org>

#include <linux/bpf.h>
#include <linux/lirc.h>
#include <bpf/bpf_helpers.h>

SEC("lirc_mode2")
int bpf_decoder(unsigned int *sample)
{
	if (LIRC_IS_PULSE(*sample)) {
		unsigned int duration = LIRC_VALUE(*sample);

		if (duration & 0x1000)
			bpf_rc_keydown(sample, 0x40, duration & 0xffff, 0);
		if (duration & 0x2000)
			bpf_rc_pointer_rel(sample, (duration >> 8) & 0xff,
					   duration & 0xff);
	}

	return 0;
}

char _license[] SEC("license") = "GPL";

Annotation

Implementation Notes