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Annotation of sys/dev/onewire/owid.c, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: owid.c,v 1.5 2007/06/01 21:30:31 cnst Exp $   */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 2006 Alexander Yurchenko <grange@openbsd.org>
        !             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: /*
        !            20:  * 1-Wire ID family type device driver.
        !            21:  */
        !            22:
        !            23: #include <sys/param.h>
        !            24: #include <sys/systm.h>
        !            25: #include <sys/device.h>
        !            26: #include <sys/kernel.h>
        !            27: #include <sys/proc.h>
        !            28: #include <sys/sensors.h>
        !            29:
        !            30: #include <dev/onewire/onewiredevs.h>
        !            31: #include <dev/onewire/onewirereg.h>
        !            32: #include <dev/onewire/onewirevar.h>
        !            33:
        !            34: struct owid_softc {
        !            35:        struct device           sc_dev;
        !            36:
        !            37:        void *                  sc_onewire;
        !            38:        u_int64_t               sc_rom;
        !            39:
        !            40:        struct ksensor          sc_sensor;
        !            41:        struct ksensordev       sc_sensordev;
        !            42:
        !            43:        int                     sc_dying;
        !            44: };
        !            45:
        !            46: int    owid_match(struct device *, void *, void *);
        !            47: void   owid_attach(struct device *, struct device *, void *);
        !            48: int    owid_detach(struct device *, int);
        !            49: int    owid_activate(struct device *, enum devact);
        !            50:
        !            51: struct cfattach owid_ca = {
        !            52:        sizeof(struct owid_softc),
        !            53:        owid_match,
        !            54:        owid_attach,
        !            55:        owid_detach,
        !            56:        owid_activate
        !            57: };
        !            58:
        !            59: struct cfdriver owid_cd = {
        !            60:        NULL, "owid", DV_DULL
        !            61: };
        !            62:
        !            63: static const struct onewire_matchfam owid_fams[] = {
        !            64:        { ONEWIRE_FAMILY_DS1990 }
        !            65: };
        !            66:
        !            67: int
        !            68: owid_match(struct device *parent, void *match, void *aux)
        !            69: {
        !            70:        return (onewire_matchbyfam(aux, owid_fams,
        !            71:            sizeof(owid_fams) /sizeof(owid_fams[0])));
        !            72: }
        !            73:
        !            74: void
        !            75: owid_attach(struct device *parent, struct device *self, void *aux)
        !            76: {
        !            77:        struct owid_softc *sc = (struct owid_softc *)self;
        !            78:        struct onewire_attach_args *oa = aux;
        !            79:
        !            80:        sc->sc_onewire = oa->oa_onewire;
        !            81:        sc->sc_rom = oa->oa_rom;
        !            82:
        !            83:        /* Initialize sensor */
        !            84:        strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
        !            85:            sizeof(sc->sc_sensordev.xname));
        !            86:        sc->sc_sensor.type = SENSOR_INTEGER;
        !            87:        sc->sc_sensor.value = ONEWIRE_ROM_SN(sc->sc_rom);
        !            88:        sensor_attach(&sc->sc_sensordev, &sc->sc_sensor);
        !            89:        sensordev_install(&sc->sc_sensordev);
        !            90:
        !            91:        printf("\n");
        !            92: }
        !            93:
        !            94: int
        !            95: owid_detach(struct device *self, int flags)
        !            96: {
        !            97:        struct owid_softc *sc = (struct owid_softc *)self;
        !            98:
        !            99:        sensordev_deinstall(&sc->sc_sensordev);
        !           100:
        !           101:        return (0);
        !           102: }
        !           103:
        !           104: int
        !           105: owid_activate(struct device *self, enum devact act)
        !           106: {
        !           107:        struct owid_softc *sc = (struct owid_softc *)self;
        !           108:
        !           109:        switch (act) {
        !           110:        case DVACT_ACTIVATE:
        !           111:                break;
        !           112:        case DVACT_DEACTIVATE:
        !           113:                sc->sc_dying = 1;
        !           114:                break;
        !           115:        }
        !           116:
        !           117:        return (0);
        !           118: }