98 lines
3.2 KiB
C
98 lines
3.2 KiB
C
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/* $NetBSD: button.h,v 1.1 2006/09/01 21:26:18 uwe Exp $ */
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/*
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* Copyright (c) 2003 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _MACHINE_BUTTON_H_
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#define _MACHINE_BUTTON_H_
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#include <sys/ioccom.h>
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#define BUTTON_EVENT_PRESSED 0 /* button pressed */
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#define BUTTON_EVENT_RELEASED 1 /* button released */
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#define BUTTON_STATE_PRESSED 0 /* button pressed */
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#define BUTTON_STATE_RELEASED 1 /* button released */
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#define BUTTON_STATE_UNKNOWN -1
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/*
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* This structure describes the state of a button. It is used
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* by the BUTTON_IOC_GET_SWSTATE ioctl, as well as in button
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* event messages.
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*/
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struct button_state {
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char bs_name[32]; /* button name */
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int32_t bs_state; /* state of the switch/event */
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};
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/*
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* button event messages:
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*
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* We ensure that a message is always exactly 32 bytes long, so that
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* userland doesn't need to issue multiple reads to get a single event.
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*/
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#define BUTTON_EVENT_MSG_SIZE 32
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#define BUTTON_EVENT_STATE_CHANGE 0
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typedef struct {
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int32_t bev_type; /* button event type */
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union {
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int32_t _bev_d_space[(BUTTON_EVENT_MSG_SIZE /
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sizeof(int32_t)) - 1];
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/*
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* This field is used for:
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*
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* BUTTON_EVENT_STATE_CHANGE
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*/
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struct button_state _bev_d_event;
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} _bev_data;
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} button_event_t;
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#define bev_event _bev_data._bev_d_event
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/*
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* BUTTON_IOC_GET_TYPE:
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*
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* Get the button back-end type.
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*/
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struct button_type {
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char button_type[32];
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};
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#define BUTTON_IOC_GET_TYPE _IOR('P', 1, sizeof(struct button_type))
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#endif /* _MACHINE_BUTTON_H_ */
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