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Annotation of sys/arch/sparc64/dev/power.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: power.c,v 1.5 2007/04/24 18:30:45 kettenis 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 kbd_reset;
                    136:
                    137:        if (kbd_reset == 1) {
                    138:                kbd_reset = 0;
                    139:                psignal(initproc, SIGUSR2);
                    140:        }
                    141:        return (1);
                    142: }