1/* SPDX-License-Identifier: LGPL-2.0+ WITH Linux-syscall-note */
2/*
3 * userio: virtual serio device support
4 * Copyright (C) 2015 Red Hat
5 * Copyright (C) 2015 Lyude Paul <thatslyude@gmail.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU Lesser General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
14 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
15 * details.
16 *
17 * This is the public header used for user-space communication with the userio
18 * driver. __attribute__((__packed__)) is used for all structs to keep ABI
19 * compatibility between all architectures.
20 */
21
22#ifndef _USERIO_H
23#define _USERIO_H
24
25#include <linux/types.h>
26
27enum userio_cmd_type {
28 USERIO_CMD_REGISTER = 0,
29 USERIO_CMD_SET_PORT_TYPE = 1,
30 USERIO_CMD_SEND_INTERRUPT = 2,
31 USERIO_CMD_SET_PORT_EXTRA = 3,
32 USERIO_CMD_SET_PORT_ID = 4,
33 USERIO_CMD_SET_PORT_PROTO = 5,
34};
35
36/*
37 * userio Commands
38 * All commands sent to /dev/userio are encoded using this structure. The type
39 * field should contain a USERIO_CMD* value that indicates what kind of command
40 * is being sent to userio. The data field should contain the accompanying
41 * argument for the command, if there is one.
42 */
43struct userio_cmd {
44 __u8 type;
45 __u8 data;
46} __attribute__((__packed__));
47
48#endif /* !_USERIO_H */