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power.c revision 1.6 
      1 /*	$NetBSD: power.c,v 1.6 1996/12/10 22:55:02 pk Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1996
      5  *	The President and Fellows of Harvard College. All rights reserved.
      6  *
      7  * All advertising materials mentioning features or use of this software
      8  * must display the following acknowledgement:
      9  *	This product includes software developed by Aaron Brown and
     10  *	Harvard University.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  *
     16  * 1. Redistributions of source code must retain the above copyright
     17  *    notice, this list of conditions and the following disclaimer.
     18  * 2. Redistributions in binary form must reproduce the above copyright
     19  *    notice, this list of conditions and the following disclaimer in the
     20  *    documentation and/or other materials provided with the distribution.
     21  * 3. All advertising materials mentioning features or use of this software
     22  *    must display the following acknowledgement:
     23  *	This product includes software developed by Harvard University
     24  *	and its contributors.
     25  * 4. Neither the name of the University nor the names of its contributors
     26  *    may be used to endorse or promote products derived from this software
     27  *    without specific prior written permission.
     28  *
     29  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     30  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     31  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     32  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     33  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     34  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     35  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     37  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     38  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     39  * SUCH DAMAGE.
     40  */
     41 
     42 #include <sys/param.h>
     43 #include <sys/device.h>
     44 #include <sys/kernel.h>
     45 #include <sys/systm.h>
     46 
     47 #include <machine/autoconf.h>
     48 
     49 #include <sparc/dev/power.h>
     50 
     51 static int powermatch __P((struct device *, struct cfdata *, void *));
     52 static void powerattach __P((struct device *, struct device *, void *));
     53 
     54 struct cfattach power_ca = {
     55 	sizeof(struct device), powermatch, powerattach
     56 };
     57 
     58 struct cfdriver power_cd = {
     59 	NULL, "power", DV_DULL
     60 };
     61 
     62 /*
     63  * This is the driver for the "power" register available on some Sun4m
     64  * machines. This allows the machine to remove power automatically when
     65  * shutdown or halted or whatever.
     66  *
     67  * XXX: this capability is not utilized in the current kernel.
     68  */
     69 
     70 static int
     71 powermatch(parent, cf, aux)
     72 	struct device *parent;
     73 	struct cfdata *cf;
     74 	void *aux;
     75 {
     76 	register struct confargs *ca = aux;
     77 
     78 	if (CPU_ISSUN4M)
     79 		return (strcmp("power", ca->ca_ra.ra_name) == 0);
     80 
     81 	return (0);
     82 }
     83 
     84 /* ARGSUSED */
     85 static void
     86 powerattach(parent, self, aux)
     87 	struct device *parent, *self;
     88 	void *aux;
     89 {
     90 	struct confargs *ca = aux;
     91 	struct romaux *ra = &ca->ca_ra;
     92 
     93 	power_reg = mapdev(ra->ra_reg, 0, 0, sizeof(long), ca->ca_bustype);
     94 
     95 	printf("\n");
     96 }
     97 
     98 void
     99 powerdown()
    100 {
    101 	*POWER_REG |= POWER_OFF;
    102 }
    103