/*      $OpenBSD: owid.c,v 1.12 2022/04/06 18:59:29 naddy Exp $ */

/*
 * Copyright (c) 2006 Alexander Yurchenko <grange@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/*
 * 1-Wire ID family type device driver.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/sensors.h>

#include <dev/onewire/onewiredevs.h>
#include <dev/onewire/onewirereg.h>
#include <dev/onewire/onewirevar.h>

struct owid_softc {
        struct device           sc_dev;

        void *                  sc_onewire;
        u_int64_t               sc_rom;

        struct ksensor          sc_sensor;
        struct ksensordev       sc_sensordev;

        int                     sc_dying;
};

int     owid_match(struct device *, void *, void *);
void    owid_attach(struct device *, struct device *, void *);
int     owid_detach(struct device *, int);
int     owid_activate(struct device *, int);

const struct cfattach owid_ca = {
        sizeof(struct owid_softc),
        owid_match,
        owid_attach,
        owid_detach,
        owid_activate
};

struct cfdriver owid_cd = {
        NULL, "owid", DV_DULL
};

static const struct onewire_matchfam owid_fams[] = {
        { ONEWIRE_FAMILY_DS1990 }
};

int
owid_match(struct device *parent, void *match, void *aux)
{
        return (onewire_matchbyfam(aux, owid_fams, nitems(owid_fams)));
}

void
owid_attach(struct device *parent, struct device *self, void *aux)
{
        struct owid_softc *sc = (struct owid_softc *)self;
        struct onewire_attach_args *oa = aux;

        sc->sc_onewire = oa->oa_onewire;
        sc->sc_rom = oa->oa_rom;

        /* Initialize sensor */
        strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
            sizeof(sc->sc_sensordev.xname));
        sc->sc_sensor.type = SENSOR_INTEGER;
        sc->sc_sensor.value = ONEWIRE_ROM_SN(sc->sc_rom);
        snprintf(sc->sc_sensor.desc, sizeof(sc->sc_sensor.desc), "sn %012llx",
            ONEWIRE_ROM_SN(oa->oa_rom));
        sensor_attach(&sc->sc_sensordev, &sc->sc_sensor);
        sensordev_install(&sc->sc_sensordev);

        printf("\n");
}

int
owid_detach(struct device *self, int flags)
{
        struct owid_softc *sc = (struct owid_softc *)self;

        sensordev_deinstall(&sc->sc_sensordev);

        return (0);
}

int
owid_activate(struct device *self, int act)
{
        struct owid_softc *sc = (struct owid_softc *)self;

        switch (act) {
        case DVACT_DEACTIVATE:
                sc->sc_dying = 1;
                break;
        }

        return (0);
}