leds.c revision 1.1 
1/*	$NetBSD: leds.c,v 1.1 2001/02/18 10:44:21 ragge Exp $	*/
2
3/*-
4 * Copyright (c) 1997 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Gordon W. Ross and der Mouse.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed by the NetBSD
21 *	Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39/*
40 * Functions to flash the LEDs with some pattern.
41 */
42
43#include <sys/param.h>
44#include <sys/systm.h>
45#include <sys/device.h>
46#include <sys/conf.h>
47#include <sys/buf.h>
48#include <sys/malloc.h>
49#include <sys/proc.h>
50
51#include <machine/cpu.h>
52#include <machine/sid.h>
53#include <machine/leds.h>
54
55#include "opt_cputype.h"
56
57static volatile u_short *diagreg = 0;
58static u_char led_countdown = 0;
59static u_char led_px = 0;
60
61/*
62 * Initial value is the default pattern set.
63 */
64static struct led_patterns ledpat = {
65	16,	/* divisor */
66	12,	/* patlen */
67	{	/* patterns */
68		0x03, 0x06, 0x0c, 0x18,
69		0x30, 0x60, 0xc0, 0x60,
70		0x30, 0x18, 0x0c, 0x06,
71	}
72};
73
74void
75ledsattach(int a)
76{
77	switch (vax_boardtype) {
78#if VAX46
79	case VAX_BTYP_46: {
80		extern struct vs_cpu *ka46_cpu;
81		diagreg = (volatile u_short *)(&ka46_cpu->vc_diagdsp);
82		break;
83		}
84#endif
85#if VAX48
86	case VAX_BTYP_48: {
87		extern struct vs_cpu *ka48_cpu;
88		diagreg = (volatile u_short *)(&ka48_cpu->vc_diagdsp);
89		break;
90		}
91#endif
92#if VAX49
93	case VAX_BTYP_49:
94		diagreg = (volatile u_short *)vax_map_physmem(0x25800000, 1);
95		diagreg += 2;
96		break;
97#endif
98	default:
99		return;
100	}
101
102	/* Turn on some lights. */
103	leds_intr();
104}
105
106/*
107 * This is called by the clock interrupt.
108 */
109void
110leds_intr()
111{
112	register u_char i;
113
114	if (diagreg == 0)
115		return;
116
117	if (led_countdown) {
118		led_countdown--;
119		return;
120	}
121
122	led_countdown = ledpat.divisor - 1;
123	i = led_px;
124
125	*diagreg = ~ledpat.pat[i];
126
127	i = i+1;
128	if (i == ledpat.patlen)
129		i = 0;
130	led_px = i;
131}
132
133/*
134 * This is called by mem.c to handle /dev/leds
135 */
136int
137leds_uio(struct uio *uio)
138{
139	int cnt, error;
140	int off;	/* NOT off_t */
141	caddr_t va;
142
143	off = uio->uio_offset;
144	if ((off < 0) || (off > sizeof(ledpat)))
145		return (EIO);
146
147	cnt = min(uio->uio_resid, (sizeof(ledpat) - off));
148	if (cnt == 0)
149		return (0); /* EOF */
150
151	va = ((char*)(&ledpat)) + off;
152	error = uiomove(va, cnt, uio);
153
154	return (error);
155}
156
157