freebsd-dev/sys/i386/include/ppireg.h

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/*-
* Copyright (C) 2005 TAKAHASHI Yoshihiro. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _MACHINE_PPIREG_H_
#define _MACHINE_PPIREG_H_
#ifdef _KERNEL
#define IO_PPI 0x61 /* Programmable Peripheral Interface */
/*
* PPI speaker control values
*/
#define PIT_ENABLETMR2 0x01 /* Enable timer/counter 2 */
#define PIT_SPKRDATA 0x02 /* Direct to speaker */
#define PIT_SPKR (PIT_ENABLETMR2 | PIT_SPKRDATA)
#define ppi_spkr_on() outb(IO_PPI, inb(IO_PPI) | PIT_SPKR)
#define ppi_spkr_off() outb(IO_PPI, inb(IO_PPI) & ~PIT_SPKR)
#endif /* _KERNEL */
#endif /* _MACHINE_PPIREG_H_ */