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1/* SPDX-License-Identifier: LGPL-2.0+ WITH Linux-syscall-note */2/*3 * userio: virtual serio device support4 * Copyright (C) 2015 Red Hat5 * Copyright (C) 2015 Lyude (Stephen Chandler Paul) <cpaul@redhat.com>6 *7 * This program is free software; you can redistribute it and/or modify it8 * under the terms of the GNU Lesser General Public License as published by the9 * Free Software Foundation; either version 2 of the License, or (at your10 * option) any later version.11 *12 * This program is distributed in the hope that it will be useful, but WITHOUT13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS14 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more15 * details.16 *17 * This is the public header used for user-space communication with the userio18 * driver. __attribute__((__packed__)) is used for all structs to keep ABI19 * compatibility between all architectures.20 */21 22#ifndef _USERIO_H23#define _USERIO_H24 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 = 231};32 33/*34 * userio Commands35 * All commands sent to /dev/userio are encoded using this structure. The type36 * field should contain a USERIO_CMD* value that indicates what kind of command37 * is being sent to userio. The data field should contain the accompanying38 * argument for the command, if there is one.39 */40struct userio_cmd {41 __u8 type;42 __u8 data;43} __attribute__((__packed__));44 45#endif /* !_USERIO_H */46