/*      $OpenBSD: viareg.h,v 1.4 2002/06/07 07:14:48 miod Exp $ */
/*      $NetBSD: viareg.h,v 1.2 1998/10/20 14:56:30 tsubai Exp $        */

/*-
 * Copyright (C) 1993   Allen K. Briggs, Chris P. Caputo,
 *                      Michael L. Finch, Bradley A. Grantham, and
 *                      Lawrence A. Kesteloot
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the Alice Group.
 * 4. The names of the Alice Group or any of its members may not be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``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 THE ALICE GROUP 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.
 *
 */
/*

        Prototype VIA control definitions

        06/04/92,22:33:57 BG Let's see what I can do.

*/

extern volatile unsigned char *Via1Base;
#define VIA1_addr       Via1Base        /* at PA 0x50f00000 */

#define VIA1            0
#define VIA2            0

        /* VIA interface registers */
#define vBufA           0x1e00  /* register A */
#define vBufB           0       /* register B */
#define vDirA           0x0600  /* data direction register */
#define vDirB           0x0400  /* data direction register */
#define vT1C            0x0800
#define vT1CH           0x0a00
#define vT1L            0x0c00
#define vT1LH           0x0e00
#define vT2C            0x1000
#define vT2CH           0x1200
#define vSR             0x1400  /* shift register */
#define vACR            0x1600  /* aux control register */
#define vIFR            0x1a00  /* interrupt flag register */
#define vIER            0x1c00  /* interrupt enable register */

#define via_reg(v, r) (*(Via1Base + (r)))

#include <machine/pio.h>

static __inline void
via_reg_and(int ign, int reg, int val)
{
        volatile unsigned char *addr = Via1Base + reg;

        out8(addr, in8(addr) & val);
}

static __inline void
via_reg_or(int ign, int reg, int val)
{
        volatile unsigned char *addr = Via1Base + reg;

        out8(addr, in8(addr) | val);
}

static __inline void
via_reg_xor(int ign, int reg, int val)
{
        volatile unsigned char *addr = Via1Base + reg;

        out8(addr, in8(addr) ^ val);
}

static __inline int
read_via_reg(int ign, int reg)
{
        volatile unsigned char *addr = Via1Base + reg;

        return in8(addr);
}

static __inline void
write_via_reg(int ign, int reg, int val)
{
        volatile unsigned char *addr = Via1Base + reg;

        out8(addr, val);
}