mirror of
https://github.com/openharmony/third_party_Linux_Kernel.git
synced 2026-08-24 23:51:31 -04:00
maguangyao
45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
/*
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* userio: virtual serio device support
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* Copyright (C) 2015 Red Hat
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* Copyright (C) 2015 Lyude (Stephen Chandler Paul) <cpaul@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* This is the public header used for user-space communication with the userio
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* driver. __attribute__((__packed__)) is used for all structs to keep ABI
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* compatibility between all architectures.
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*/
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#ifndef _USERIO_H
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#define _USERIO_H
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#include <linux/types.h>
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enum userio_cmd_type {
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USERIO_CMD_REGISTER = 0,
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USERIO_CMD_SET_PORT_TYPE = 1,
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USERIO_CMD_SEND_INTERRUPT = 2
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};
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/*
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* userio Commands
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* All commands sent to /dev/userio are encoded using this structure. The type
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* field should contain a USERIO_CMD* value that indicates what kind of command
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* is being sent to userio. The data field should contain the accompanying
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* argument for the command, if there is one.
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*/
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struct userio_cmd {
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__u8 type;
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__u8 data;
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} __attribute__((__packed__));
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#endif /* !_USERIO_H */
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