LXR linux/include/uapi/linux/userio.h

   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 (Stephen Chandler Paul) <cpaul@redhat.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};
  32
  33/*
  34 * userio Commands
  35 * All commands sent to /dev/userio are encoded using this structure. The type
  36 * field should contain a USERIO_CMD* value that indicates what kind of command
  37 * is being sent to userio. The data field should contain the accompanying
  38 * 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