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Annotation of sys/dev/acpi/acpibtn.c, Revision 1.1.1.1

1.1       nbrk        1: /* $OpenBSD: acpibtn.c,v 1.15 2006/12/26 23:58:08 marco Exp $ */
                      2: /*
                      3:  * Copyright (c) 2005 Marco Peereboom <marco@openbsd.org>
                      4:  *
                      5:  * Permission to use, copy, modify, and distribute this software for any
                      6:  * purpose with or without fee is hereby granted, provided that the above
                      7:  * copyright notice and this permission notice appear in all copies.
                      8:  *
                      9:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     10:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     11:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     12:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     13:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     14:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     15:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     16:  */
                     17:
                     18: #include <sys/param.h>
                     19: #include <sys/proc.h>
                     20: #include <sys/signalvar.h>
                     21: #include <sys/systm.h>
                     22: #include <sys/device.h>
                     23: #include <sys/malloc.h>
                     24:
                     25: #include <machine/bus.h>
                     26:
                     27: #include <dev/acpi/acpireg.h>
                     28: #include <dev/acpi/acpivar.h>
                     29: #include <dev/acpi/acpidev.h>
                     30: #include <dev/acpi/amltypes.h>
                     31: #include <dev/acpi/dsdt.h>
                     32:
                     33: #include <sys/sensors.h>
                     34:
                     35: int    acpibtn_match(struct device *, void *, void *);
                     36: void   acpibtn_attach(struct device *, struct device *, void *);
                     37: int    acpibtn_notify(struct aml_node *, int, void *);
                     38:
                     39: struct acpibtn_softc {
                     40:        struct device           sc_dev;
                     41:
                     42:        bus_space_tag_t         sc_iot;
                     43:        bus_space_handle_t      sc_ioh;
                     44:
                     45:        struct acpi_softc       *sc_acpi;
                     46:        struct aml_node         *sc_devnode;
                     47:
                     48:        int                     sc_btn_type;
                     49: #define        ACPIBTN_UNKNOWN -1
                     50: #define ACPIBTN_LID    0
                     51: #define ACPIBTN_POWER  1
                     52: #define ACPIBTN_SLEEP  2
                     53: };
                     54:
                     55: int    acpibtn_getsta(struct acpibtn_softc *);
                     56:
                     57: struct cfattach acpibtn_ca = {
                     58:        sizeof(struct acpibtn_softc), acpibtn_match, acpibtn_attach
                     59: };
                     60:
                     61: struct cfdriver acpibtn_cd = {
                     62:        NULL, "acpibtn", DV_DULL
                     63: };
                     64:
                     65: int
                     66: acpibtn_match(struct device *parent, void *match, void *aux)
                     67: {
                     68:        struct acpi_attach_args *aa = aux;
                     69:        struct cfdata           *cf = match;
                     70:
                     71:        /* sanity */
                     72:        if (aa->aaa_name == NULL ||
                     73:            strcmp(aa->aaa_name, cf->cf_driver->cd_name) != 0 ||
                     74:            aa->aaa_table != NULL)
                     75:                return (0);
                     76:
                     77:        return (1);
                     78: }
                     79:
                     80: void
                     81: acpibtn_attach(struct device *parent, struct device *self, void *aux)
                     82: {
                     83:        struct acpibtn_softc    *sc = (struct acpibtn_softc *)self;
                     84:        struct acpi_attach_args *aa = aux;
                     85:
                     86:        sc->sc_acpi = (struct acpi_softc *)parent;
                     87:        sc->sc_devnode = aa->aaa_node->child;
                     88:
                     89:        if (!strcmp(aa->aaa_dev, ACPI_DEV_LD))
                     90:                sc->sc_btn_type = ACPIBTN_LID;
                     91:        else if (!strcmp(aa->aaa_dev, ACPI_DEV_PBD))
                     92:                sc->sc_btn_type = ACPIBTN_POWER;
                     93:        else if (!strcmp(aa->aaa_dev, ACPI_DEV_SBD))
                     94:                sc->sc_btn_type = ACPIBTN_SLEEP;
                     95:        else
                     96:                sc->sc_btn_type = ACPIBTN_UNKNOWN;
                     97:
                     98:        acpibtn_getsta(sc);
                     99:
                    100:        printf(": %s\n", sc->sc_devnode->parent->name);
                    101:
                    102:        aml_register_notify(sc->sc_devnode->parent, aa->aaa_dev, acpibtn_notify,
                    103:            sc, ACPIDEV_NOPOLL);
                    104: }
                    105:
                    106: int
                    107: acpibtn_getsta(struct acpibtn_softc *sc)
                    108: {
                    109:        if (aml_evalname(sc->sc_acpi, sc->sc_devnode, "_STA", 0, NULL, NULL) != 0) {
                    110:                dnprintf(20, "%s: no _STA\n", DEVNAME(sc));
                    111:                /* XXX not all buttons have _STA so FALLTROUGH */
                    112:        }
                    113:
                    114:        return (0);
                    115: }
                    116:
                    117: int
                    118: acpibtn_notify(struct aml_node *node, int notify_type, void *arg)
                    119: {
                    120:        struct acpibtn_softc    *sc = arg;
                    121:        extern int              acpi_s5;
                    122:
                    123:        dnprintf(10, "acpibtn_notify: %.2x %s\n", notify_type,
                    124:            sc->sc_devnode->parent->name);
                    125:
                    126:        switch (sc->sc_btn_type) {
                    127:        case ACPIBTN_LID:
                    128:        case ACPIBTN_SLEEP:
                    129:                break;
                    130:        case ACPIBTN_POWER:
                    131:                if (notify_type == 0x80) {
                    132:                        acpi_s5 = 1;
                    133:                        psignal(initproc, SIGUSR1);
                    134:                }
                    135:                break;
                    136:        default:
                    137:                printf("%s: spurious acpi button interrupt %i\n", DEVNAME(sc),
                    138:                    sc->sc_btn_type);
                    139:                break;
                    140:        }
                    141:
                    142:        return (0);
                    143: }