sys/arch/sparc64/dev/power.c

   1 /*      $NetBSD: power.c,v 1.10 2009/03/14 21:04:16 dsl 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/cdefs.h>
  43 __KERNEL_RCSID(0, "$NetBSD: power.c,v 1.10 2009/03/14 21:04:16 dsl Exp $");
  44
  45 #include <sys/param.h>
  46 #include <sys/device.h>
  47 #include <sys/kernel.h>
  48 #include <sys/systm.h>
  49
  50 #include <machine/autoconf.h>
  51
  52 #include <sparc64/dev/power.h>
  53
  54 static int powermatch(struct device *, struct cfdata *, void *);
  55 static void powerattach(struct device *, struct device *, void *);
  56
  57 CFATTACH_DECL(power, sizeof(struct device),
  58     powermatch, powerattach, NULL, NULL);
  59
  60 extern struct cfdriver power_cd;
  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 used in the current kernel.
  68  */
  69
  70 static int
  71 powermatch(struct device *parent, struct cfdata *cf, void *aux)
  72 {
  73         register struct confargs *ca = aux;
  74
  75         if (CPU_ISSUN4M)
  76                 return (strcmp("power", ca->ca_ra.ra_name) == 0);
  77
  78         return (0);
  79 }
  80
  81 /* ARGSUSED */
  82 static void
  83 powerattach(struct device *parent, struct device *self, void *aux)
  84 {
  85         struct confargs *ca = aux;
  86         struct romaux *ra = &ca->ca_ra;
  87
  88         power_reg = mapiodev(ra->ra_reg, 0, sizeof(long));
  89
  90         printf("\n");
  91 }
  92
  93 void
  94 powerdown(void)
  95 {
  96         *POWER_REG |= POWER_OFF;
  97 }