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Annotation of sys/dev/onewire/owid.c, Revision 1.1.1.1

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: }