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Annotation of sys/arch/landisk/dev/power.c, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: power.c,v 1.4 2007/06/15 18:17:25 miod Exp $  */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 2007 Martin Reindl.
        !             5:  *
        !             6:  * Permission to use, copy, modify, and distribute this software for any
        !             7:  * purpose with or without fee is hereby granted, provided that the above
        !             8:  * copyright notice and this permission notice appear in all copies.
        !             9:  *
        !            10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
        !            11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !            12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
        !            13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
        !            14:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
        !            15:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
        !            16:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            17:  */
        !            18:
        !            19: #include <sys/types.h>
        !            20: #include <sys/param.h>
        !            21: #include <sys/systm.h>
        !            22: #include <sys/kernel.h>
        !            23: #include <sys/device.h>
        !            24: #include <sys/conf.h>
        !            25: #include <sys/proc.h>
        !            26: #include <sys/signalvar.h>
        !            27:
        !            28: #include <machine/bus.h>
        !            29: #include <machine/autoconf.h>
        !            30:
        !            31: #include <sh/include/devreg.h>
        !            32:
        !            33: #include <landisk/landisk/landiskreg.h>
        !            34: #include <landisk/dev/obiovar.h>
        !            35:
        !            36: struct power_softc {
        !            37:        struct device           sc_dev;
        !            38:        void                    *sc_ih;
        !            39: };
        !            40:
        !            41: int    power_match(struct device *, void *, void *);
        !            42: void   power_attach(struct device *, struct device *, void *);
        !            43: int    power_intr(void *aux);
        !            44:
        !            45: struct cfattach power_ca = {
        !            46:        sizeof(struct power_softc),
        !            47:        power_match,
        !            48:        power_attach
        !            49: };
        !            50:
        !            51: struct cfdriver power_cd = {
        !            52:        NULL, "power", DV_DULL
        !            53: };
        !            54:
        !            55: struct power_softc *power_softc;
        !            56:
        !            57: int
        !            58: power_match(struct device *parent, void *match, void *aux)
        !            59: {
        !            60:        struct obio_attach_args *oa = aux;
        !            61:        static struct obio_irq power_match_irq;
        !            62:
        !            63:        oa->oa_nio = 0;
        !            64:        oa->oa_niomem = 0;
        !            65:        if (oa->oa_nirq == 0)
        !            66:                oa->oa_irq = &power_match_irq;
        !            67:        oa->oa_nirq = 1;
        !            68:        oa->oa_irq[0].or_irq = LANDISK_INTR_PWRSW;
        !            69:
        !            70:        return (1);
        !            71: }
        !            72:
        !            73: void
        !            74: power_attach(struct device *parent, struct device *self, void *aux)
        !            75: {
        !            76:        struct power_softc *sc = (void *)self;
        !            77:
        !            78:        power_softc = sc;
        !            79:
        !            80:        sc->sc_ih = extintr_establish(LANDISK_INTR_PWRSW, IPL_TTY,
        !            81:            power_intr, sc, sc->sc_dev.dv_xname);
        !            82:        if (sc->sc_ih == NULL) {
        !            83:                printf(": couldn't map interrupt\n");
        !            84:                return;
        !            85:        }
        !            86:
        !            87:        printf("\n");
        !            88: }
        !            89:
        !            90: int
        !            91: power_intr(void *arg)
        !            92: {
        !            93:        extern int kbd_reset;
        !            94:        int status;
        !            95:
        !            96:        status = (int8_t)_reg_read_1(LANDISK_BTNSTAT);
        !            97:        if (status == -1) {
        !            98:                return (0);
        !            99:        }
        !           100:
        !           101:        status = ~status;
        !           102:        if (status & BTN_POWER_BIT) {
        !           103: #ifdef DEBUG
        !           104:                printf("%s switched\n", sc->sc_dev.dv_xname);
        !           105:                Debugger();
        !           106: #endif
        !           107:                _reg_write_1(LANDISK_PWRSW_INTCLR, 1);
        !           108:                if (kbd_reset == 1) {
        !           109:                        kbd_reset = 0;
        !           110:                        psignal(initproc, SIGUSR1);
        !           111:                }
        !           112:                return (1);
        !           113:        }
        !           114:        return (0);
        !           115: }