1 /* $OpenBSD: power.c,v 1.6 2011/06/24 19:47:49 naddy Exp $ */ 2 3 /* 4 * Copyright (c) 2006 Jason L. Wright (jason@thought.net) 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 25 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* 30 * Driver for power-button device on U5, U10, etc. 31 */ 32 33 #include <sys/types.h> 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/device.h> 38 #include <sys/conf.h> 39 #include <sys/timeout.h> 40 #include <sys/proc.h> 41 #include <sys/signalvar.h> 42 43 #include <machine/bus.h> 44 #include <machine/autoconf.h> 45 #include <machine/openfirm.h> 46 47 #include <sparc64/dev/ebusreg.h> 48 #include <sparc64/dev/ebusvar.h> 49 50 #define POWER_REG 0 51 52 #define POWER_REG_CPWR_OFF 0x00000002 /* courtesy power off */ 53 #define POWER_REG_SPWR_OFF 0x00000001 /* system power off */ 54 55 struct power_softc { 56 struct device sc_dev; 57 bus_space_tag_t sc_iot; 58 bus_space_handle_t sc_ioh; 59 struct intrhand *sc_ih; 60 }; 61 62 int power_match(struct device *, void *, void *); 63 void power_attach(struct device *, struct device *, void *); 64 int power_intr(void *); 65 66 struct cfattach power_ca = { 67 sizeof(struct power_softc), power_match, power_attach 68 }; 69 70 struct cfdriver power_cd = { 71 NULL, "power", DV_DULL 72 }; 73 74 int 75 power_match(parent, match, aux) 76 struct device *parent; 77 void *match; 78 void *aux; 79 { 80 struct ebus_attach_args *ea = aux; 81 82 if (strcmp(ea->ea_name, "power") == 0) 83 return (1); 84 return (0); 85 } 86 87 void 88 power_attach(parent, self, aux) 89 struct device *parent, *self; 90 void *aux; 91 { 92 struct power_softc *sc = (void *)self; 93 struct ebus_attach_args *ea = aux; 94 95 if (ea->ea_nregs < 1) { 96 printf(": no registers\n"); 97 return; 98 } 99 100 /* Use prom address if available, otherwise map it. */ 101 if (ea->ea_nvaddrs) { 102 if (bus_space_map(ea->ea_memtag, ea->ea_vaddrs[0], 0, 103 BUS_SPACE_MAP_PROMADDRESS, &sc->sc_ioh)) { 104 printf(": can't map PROM register space\n"); 105 return; 106 } 107 sc->sc_iot = ea->ea_memtag; 108 } else if (ebus_bus_map(ea->ea_iotag, 0, 109 EBUS_PADDR_FROM_REG(&ea->ea_regs[0]), 110 ea->ea_regs[0].size, 0, 0, &sc->sc_ioh) == 0) { 111 sc->sc_iot = ea->ea_iotag; 112 } else if (ebus_bus_map(ea->ea_memtag, 0, 113 EBUS_PADDR_FROM_REG(&ea->ea_regs[0]), 114 ea->ea_regs[0].size, 0, 0, &sc->sc_ioh) == 0) { 115 sc->sc_iot = ea->ea_memtag; 116 } else { 117 printf("%s: can't map register space\n", self->dv_xname); 118 return; 119 } 120 121 if (ea->ea_nintrs > 0 && OF_getproplen(ea->ea_node, "button") >= 0) { 122 sc->sc_ih = bus_intr_establish(sc->sc_iot, ea->ea_intrs[0], 123 IPL_BIO, 0, power_intr, sc, self->dv_xname); 124 if (sc->sc_ih == NULL) { 125 printf(": can't establish interrupt\n"); 126 return; 127 } 128 } 129 printf("\n"); 130 } 131 132 int 133 power_intr(void *vsc) 134 { 135 extern int allowpowerdown; 136 137 if (allowpowerdown == 1) { 138 allowpowerdown = 0; 139 psignal(initproc, SIGUSR2); 140 } 141 return (1); 142 } 143