NetBSD/sys/arch/sparc/dev/power.c

117 lines
3.6 KiB
C

/* $NetBSD: power.c,v 1.11 1999/04/28 18:49:40 fair Exp $ */
/*
* Copyright (c) 1996
* The President and Fellows of Harvard College. All rights reserved.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Aaron Brown and
* Harvard University.
*
* 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.
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Harvard University
* and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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/param.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <machine/autoconf.h>
#include <sparc/dev/power.h>
static int powermatch __P((struct device *, struct cfdata *, void *));
static void powerattach __P((struct device *, struct device *, void *));
struct cfattach power_ca = {
sizeof(struct device), powermatch, powerattach
};
/*
* This is the driver for the "power" register available on some Sun4m
* machines. This allows the machine to remove power automatically when
* shutdown or halted or whatever.
*/
static int
powermatch(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
union obio_attach_args *uoba = aux;
struct sbus_attach_args *sa = &uoba->uoba_sbus;
if (uoba->uoba_isobio4 != 0)
return (0);
return (strcmp("power", sa->sa_name) == 0);
}
/* ARGSUSED */
static void
powerattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
union obio_attach_args *uoba = aux;
struct sbus_attach_args *sa = &uoba->uoba_sbus;
bus_space_handle_t bh;
/* Map the power configuration register. */
if (sbus_bus_map(sa->sa_bustag,
sa->sa_slot,
sa->sa_offset,
sizeof(u_int8_t),
BUS_SPACE_MAP_LINEAR,
0, &bh) != 0) {
printf("%s: cannot map register\n", self->dv_xname);
return;
}
power_reg = (volatile u_int8_t *)bh;
printf("\n");
}
void
powerdown()
{
/* Only try if the power node was attached. */
if (power_reg != NULL)
*POWER_REG |= POWER_OFF;
/*
* don't return too quickly; the PROMs on some sparcs
* report the powerdown as failed if we do.
*/
DELAY(1000000);
}