summaryrefslogtreecommitdiff
path: root/sys/arch/prep/isa/joy_timer.c
blob: 355da9bd5a531ed813676495b1c680ce11064a28 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
/*	$NetBSD: joy_timer.c,v 1.3 2003/07/15 02:54:51 lukem Exp $	*/

/*
 * XXX This _really_ should be rewritten such that it doesn't
 * XXX rely in the i386 timer!
 */

/*-
 * Copyright (c) 1995 Jean-Marc Zucconi
 * All rights reserved.
 *
 * Ported to NetBSD by Matthieu Herrb <matthieu@laas.fr>
 *
 * 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
 *    in this position and unchanged.
 * 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. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 *
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: joy_timer.c,v 1.3 2003/07/15 02:54:51 lukem Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/errno.h>

#include <machine/bus.h>

#include <machine/cpu.h>
#include <machine/pio.h>
#include <machine/joystick.h>

#include <dev/isa/isavar.h>
#include <dev/isa/isareg.h>

#include <dev/ic/i8253reg.h>

#include <dev/ic/joyvar.h>

int
joy_get_tick()
{
	int low, high;

	isa_outb(IO_TIMER1 + TIMER_MODE, TIMER_SEL0);
	low = isa_inb(IO_TIMER1 + TIMER_CNTR0);
	high = isa_inb(IO_TIMER1 + TIMER_CNTR0);

	return (high << 8) | low;
}

int
joy_timer_freq()
{
	return (TIMER_FREQ);
}