1 /* $OpenBSD: power.c,v 1.7 2003/05/13 22:25:30 miod Exp $ */
2 /* $NetBSD: power.c,v 1.2 1996/05/16 15:56:56 abrown Exp $ */
3
4 /*
5 * Copyright (c) 1996
6 * The President and Fellows of Harvard College. All rights reserved.
7 *
8 * All advertising materials mentioning features or use of this software
9 * must display the following acknowledgement:
10 * This product includes software developed by Aaron Brown and
11 * Harvard University.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 *
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 * 3. All advertising materials mentioning features or use of this software
23 * must display the following acknowledgement:
24 * This product includes software developed by Harvard University
25 * and its contributors.
26 * 4. Neither the name of the University nor the names of its contributors
27 * may be used to endorse or promote products derived from this software
28 * without specific prior written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 * SUCH DAMAGE.
41 *
42 */
43
44 #include <sys/param.h>
45 #include <sys/device.h>
46 #include <sys/kernel.h>
47 #include <sys/systm.h>
48
49 #include <machine/autoconf.h>
50
51 #include <sparc/dev/power.h>
52
53 static int powermatch(struct device *, void *, void *);
54 static void powerattach(struct device *, struct device *, void *);
55
56 struct cfattach power_ca = {
57 sizeof(struct device), powermatch, powerattach
58 };
59
60 struct cfdriver power_cd = {
61 NULL, "power", DV_DULL
62 };
63
64 static char power_attached = 0;
65 volatile u_char *power_reg;
66
67 /*
68 * This is the driver for the "power" register available on some Sun4m
69 * machines. This allows the machine to remove power automatically when
70 * shutdown or halted or whatever.
71 */
72
73 static int
powermatch(parent,vcf,aux)74 powermatch(parent, vcf, aux)
75 struct device *parent;
76 void *aux, *vcf;
77 {
78 register struct confargs *ca = aux;
79
80 if (CPU_ISSUN4M)
81 return (strcmp("power", ca->ca_ra.ra_name) == 0);
82
83 return (0);
84 }
85
86 /* ARGSUSED */
87 static void
powerattach(parent,self,aux)88 powerattach(parent, self, aux)
89 struct device *parent, *self;
90 void *aux;
91 {
92 struct confargs *ca = aux;
93 struct romaux *ra = &ca->ca_ra;
94
95 power_reg = mapdev(ra->ra_reg, 0, 0, sizeof(long));
96
97 power_attached = 1;
98
99 printf("\n");
100 }
101
102 void
powerdown()103 powerdown()
104 {
105 if (power_attached)
106 *POWER_REG |= POWER_OFF;
107 DELAY(1000000);
108 }
109