117 lines
3.6 KiB
C
117 lines
3.6 KiB
C
/* $NetBSD: power.c,v 1.11 1999/04/28 18:49:40 fair Exp $ */
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/*
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* Copyright (c) 1996
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* The President and Fellows of Harvard College. All rights reserved.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Aaron Brown and
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* Harvard University.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Harvard University
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* and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/device.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <machine/autoconf.h>
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#include <sparc/dev/power.h>
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static int powermatch __P((struct device *, struct cfdata *, void *));
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static void powerattach __P((struct device *, struct device *, void *));
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struct cfattach power_ca = {
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sizeof(struct device), powermatch, powerattach
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};
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/*
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* This is the driver for the "power" register available on some Sun4m
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* machines. This allows the machine to remove power automatically when
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* shutdown or halted or whatever.
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*/
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static int
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powermatch(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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union obio_attach_args *uoba = aux;
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struct sbus_attach_args *sa = &uoba->uoba_sbus;
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if (uoba->uoba_isobio4 != 0)
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return (0);
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return (strcmp("power", sa->sa_name) == 0);
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}
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/* ARGSUSED */
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static void
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powerattach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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union obio_attach_args *uoba = aux;
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struct sbus_attach_args *sa = &uoba->uoba_sbus;
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bus_space_handle_t bh;
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/* Map the power configuration register. */
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if (sbus_bus_map(sa->sa_bustag,
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sa->sa_slot,
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sa->sa_offset,
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sizeof(u_int8_t),
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BUS_SPACE_MAP_LINEAR,
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0, &bh) != 0) {
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printf("%s: cannot map register\n", self->dv_xname);
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return;
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}
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power_reg = (volatile u_int8_t *)bh;
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printf("\n");
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}
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void
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powerdown()
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{
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/* Only try if the power node was attached. */
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if (power_reg != NULL)
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*POWER_REG |= POWER_OFF;
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/*
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* don't return too quickly; the PROMs on some sparcs
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* report the powerdown as failed if we do.
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*/
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DELAY(1000000);
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}
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