leds.c revision 1.5 
1/*	$NetBSD: leds.c,v 1.5 2007/03/04 06:01:05 christos 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/cdefs.h>
44__KERNEL_RCSID(0, "$NetBSD: leds.c,v 1.5 2007/03/04 06:01:05 christos Exp $");
45
46#include <sys/param.h>
47#include <sys/systm.h>
48#include <sys/device.h>
49#include <sys/conf.h>
50#include <sys/buf.h>
51#include <sys/malloc.h>
52#include <sys/proc.h>
53
54#include <machine/cpu.h>
55#include <machine/sid.h>
56#include <machine/leds.h>
57
58#include "opt_cputype.h"
59
60static volatile u_short *diagreg = 0;
61static u_char led_countdown = 0;
62static u_char led_px = 0;
63
64/*
65 * Initial value is the default pattern set.
66 */
67static struct led_patterns ledpat = {
68	16,	/* divisor */
69	12,	/* patlen */
70	{	/* patterns */
71		0x03, 0x06, 0x0c, 0x18,
72		0x30, 0x60, 0xc0, 0x60,
73		0x30, 0x18, 0x0c, 0x06,
74	}
75};
76
77void
78ledsattach(int a)
79{
80	switch (vax_boardtype) {
81#if VAX46 || VAXANY
82	case VAX_BTYP_46: {
83		extern struct vs_cpu *ka46_cpu;
84		diagreg = (volatile u_short *)(&ka46_cpu->vc_diagdsp);
85		break;
86		}
87#endif
88#if VAX48 || VAXANY
89	case VAX_BTYP_48: {
90		extern struct vs_cpu *ka48_cpu;
91		diagreg = (volatile u_short *)(&ka48_cpu->vc_diagdsp);
92		break;
93		}
94#endif
95#if VAX49 || VAXANY
96	case VAX_BTYP_49:
97		diagreg = (volatile u_short *)vax_map_physmem(0x25800000, 1);
98		diagreg += 2;
99		break;
100#endif
101	default:
102		return;
103	}
104
105	/* Turn on some lights. */
106	leds_intr();
107}
108
109/*
110 * This is called by the clock interrupt.
111 */
112void
113leds_intr()
114{
115	register u_char i;
116
117	if (diagreg == 0)
118		return;
119
120	if (led_countdown) {
121		led_countdown--;
122		return;
123	}
124
125	led_countdown = ledpat.divisor - 1;
126	i = led_px;
127
128	*diagreg = ~ledpat.pat[i];
129
130	i = i+1;
131	if (i == ledpat.patlen)
132		i = 0;
133	led_px = i;
134}
135
136/*
137 * This is called by mem.c to handle /dev/leds
138 */
139int
140leds_uio(struct uio *uio)
141{
142	int cnt, error;
143	int off;	/* NOT off_t */
144	void *va;
145
146	off = uio->uio_offset;
147	if ((off < 0) || (off > sizeof(ledpat)))
148		return (EIO);
149
150	cnt = min(uio->uio_resid, (sizeof(ledpat) - off));
151	if (cnt == 0)
152		return (0); /* EOF */
153
154	va = ((char*)(&ledpat)) + off;
155	error = uiomove(va, cnt, uio);
156
157	return (error);
158}
159
160