1 /* $NetBSD: power.c,v 1.7 1997/05/24 20:16:29 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 = mapiodev(ra->ra_reg, 0, sizeof(long)); 94 95 printf("\n"); 96 } 97 98 void 99 powerdown() 100 { 101 *POWER_REG |= POWER_OFF; 102 } 103