1/*	$NetBSD: leds.c,v 1.11 2023/12/20 15:34:46 thorpej 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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/*
33 * Functions to flash the LEDs with some pattern.
34 */
35
36#include <sys/cdefs.h>
37__KERNEL_RCSID(0, "$NetBSD: leds.c,v 1.11 2023/12/20 15:34:46 thorpej Exp $");
38
39#include <sys/param.h>
40#include <sys/systm.h>
41#include <sys/cpu.h>
42#include <sys/conf.h>
43#include <sys/device.h>
44#include <sys/proc.h>
45
46#include <machine/sid.h>
47#include <machine/leds.h>
48
49#include "opt_cputype.h"
50
51static volatile u_short *diagreg = 0;
52static u_char led_countdown = 0;
53static u_char led_px = 0;
54
55/*
56 * Initial value is the default pattern set.
57 */
58struct led_patterns ledpat = {
59	16,	/* divisor */
60	12,	/* patlen */
61	{	/* patterns */
62		0x03, 0x06, 0x0c, 0x18,
63		0x30, 0x60, 0xc0, 0x60,
64		0x30, 0x18, 0x0c, 0x06,
65	}
66};
67
68void
69ledsattach(int a)
70{
71	switch (vax_boardtype) {
72#if VAX46 || VAXANY
73	case VAX_BTYP_46: {
74		extern struct vs_cpu *ka46_cpu;
75		diagreg = (volatile u_short *)(&ka46_cpu->vc_diagdsp);
76		break;
77		}
78#endif
79#if VAX48 || VAXANY
80	case VAX_BTYP_48: {
81		extern struct vs_cpu *ka48_cpu;
82		diagreg = (volatile u_short *)(&ka48_cpu->vc_diagdsp);
83		break;
84		}
85#endif
86#if VAX49 || VAXANY
87	case VAX_BTYP_49:
88		diagreg = (volatile u_short *)vax_map_physmem(0x25800000, 1);
89		diagreg += 2;
90		break;
91#endif
92	default:
93		return;
94	}
95
96	/* Turn on some lights. */
97	leds_intr();
98}
99
100/*
101 * This is called by the clock interrupt.
102 */
103void
104leds_intr(void)
105{
106	register u_char i;
107
108	if (diagreg == 0)
109		return;
110
111	if (led_countdown) {
112		led_countdown--;
113		return;
114	}
115
116	led_countdown = ledpat.divisor - 1;
117	i = led_px;
118
119	*diagreg = ~ledpat.pat[i];
120
121	i = i+1;
122	if (i == ledpat.patlen)
123		i = 0;
124	led_px = i;
125}
126
127/*
128 * This is called by mem.c to handle /dev/leds
129 */
130int
131leds_uio(struct uio *uio)
132{
133	int cnt, error;
134	int off;	/* NOT off_t */
135	char *va;
136
137	off = uio->uio_offset;
138	if ((off < 0) || (off > sizeof(ledpat)))
139		return (EIO);
140
141	cnt = uimin(uio->uio_resid, (sizeof(ledpat) - off));
142	if (cnt == 0)
143		return (0); /* EOF */
144
145
146	va = (char *)&ledpat;
147	va = va + off;
148	error = uiomove(va, cnt, uio);
149
150	return (error);
151}
152
153