power.c revision 1.10
1 1.10 thorpej /* $NetBSD: power.c,v 1.10 1998/06/06 21:40:20 thorpej Exp $ */ 2 1.1 pk 3 1.1 pk /* 4 1.1 pk * Copyright (c) 1996 5 1.2 abrown * The President and Fellows of Harvard College. All rights reserved. 6 1.1 pk * 7 1.1 pk * All advertising materials mentioning features or use of this software 8 1.1 pk * must display the following acknowledgement: 9 1.1 pk * This product includes software developed by Aaron Brown and 10 1.1 pk * Harvard University. 11 1.1 pk * 12 1.1 pk * Redistribution and use in source and binary forms, with or without 13 1.1 pk * modification, are permitted provided that the following conditions 14 1.1 pk * are met: 15 1.1 pk * 16 1.1 pk * 1. Redistributions of source code must retain the above copyright 17 1.1 pk * notice, this list of conditions and the following disclaimer. 18 1.1 pk * 2. Redistributions in binary form must reproduce the above copyright 19 1.1 pk * notice, this list of conditions and the following disclaimer in the 20 1.1 pk * documentation and/or other materials provided with the distribution. 21 1.1 pk * 3. All advertising materials mentioning features or use of this software 22 1.1 pk * must display the following acknowledgement: 23 1.1 pk * This product includes software developed by Harvard University 24 1.1 pk * and its contributors. 25 1.1 pk * 4. Neither the name of the University nor the names of its contributors 26 1.1 pk * may be used to endorse or promote products derived from this software 27 1.1 pk * without specific prior written permission. 28 1.1 pk * 29 1.1 pk * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 1.1 pk * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 1.1 pk * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 1.1 pk * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 1.1 pk * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 1.1 pk * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 1.1 pk * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 1.1 pk * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 1.1 pk * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 1.1 pk * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 1.1 pk * SUCH DAMAGE. 40 1.1 pk */ 41 1.1 pk 42 1.1 pk #include <sys/param.h> 43 1.1 pk #include <sys/device.h> 44 1.1 pk #include <sys/kernel.h> 45 1.1 pk #include <sys/systm.h> 46 1.1 pk 47 1.1 pk #include <machine/autoconf.h> 48 1.1 pk 49 1.1 pk #include <sparc/dev/power.h> 50 1.1 pk 51 1.6 pk static int powermatch __P((struct device *, struct cfdata *, void *)); 52 1.1 pk static void powerattach __P((struct device *, struct device *, void *)); 53 1.1 pk 54 1.1 pk struct cfattach power_ca = { 55 1.1 pk sizeof(struct device), powermatch, powerattach 56 1.1 pk }; 57 1.1 pk 58 1.1 pk /* 59 1.1 pk * This is the driver for the "power" register available on some Sun4m 60 1.1 pk * machines. This allows the machine to remove power automatically when 61 1.1 pk * shutdown or halted or whatever. 62 1.1 pk */ 63 1.1 pk 64 1.1 pk static int 65 1.6 pk powermatch(parent, cf, aux) 66 1.1 pk struct device *parent; 67 1.6 pk struct cfdata *cf; 68 1.6 pk void *aux; 69 1.1 pk { 70 1.9 pk union obio_attach_args *uoba = aux; 71 1.9 pk struct sbus_attach_args *sa = &uoba->uoba_sbus; 72 1.1 pk 73 1.9 pk if (uoba->uoba_isobio4 != 0) 74 1.9 pk return (0); 75 1.1 pk 76 1.9 pk return (strcmp("power", sa->sa_name) == 0); 77 1.1 pk } 78 1.1 pk 79 1.1 pk /* ARGSUSED */ 80 1.1 pk static void 81 1.1 pk powerattach(parent, self, aux) 82 1.1 pk struct device *parent, *self; 83 1.1 pk void *aux; 84 1.1 pk { 85 1.9 pk union obio_attach_args *uoba = aux; 86 1.9 pk struct sbus_attach_args *sa = &uoba->uoba_sbus; 87 1.9 pk bus_space_handle_t bh; 88 1.9 pk 89 1.9 pk /* Map the power configuration register. */ 90 1.9 pk if (sbus_bus_map(sa->sa_bustag, 91 1.9 pk sa->sa_slot, 92 1.9 pk sa->sa_offset, 93 1.9 pk sizeof(u_int8_t), 94 1.9 pk BUS_SPACE_MAP_LINEAR, 95 1.9 pk 0, &bh) != 0) { 96 1.9 pk printf("%s: cannot map register\n", self->dv_xname); 97 1.9 pk return; 98 1.9 pk } 99 1.9 pk power_reg = (volatile u_int8_t *)bh; 100 1.1 pk 101 1.5 christos printf("\n"); 102 1.1 pk } 103 1.1 pk 104 1.1 pk void 105 1.1 pk powerdown() 106 1.1 pk { 107 1.10 thorpej /* Only try if the power node was attached. */ 108 1.10 thorpej if (power_reg != NULL) 109 1.10 thorpej *POWER_REG |= POWER_OFF; 110 1.1 pk } 111
Indexes created Sun Sep 21 20:09:37 GMT 2025