1 /* $OpenBSD: owid.c,v 1.11 2015/03/14 03:38:48 jsg 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/sensors.h> 27 28 #include <dev/onewire/onewiredevs.h> 29 #include <dev/onewire/onewirereg.h> 30 #include <dev/onewire/onewirevar.h> 31 32 struct owid_softc { 33 struct device sc_dev; 34 35 void * sc_onewire; 36 u_int64_t sc_rom; 37 38 struct ksensor sc_sensor; 39 struct ksensordev sc_sensordev; 40 41 int sc_dying; 42 }; 43 44 int owid_match(struct device *, void *, void *); 45 void owid_attach(struct device *, struct device *, void *); 46 int owid_detach(struct device *, int); 47 int owid_activate(struct device *, int); 48 49 struct cfattach owid_ca = { 50 sizeof(struct owid_softc), 51 owid_match, 52 owid_attach, 53 owid_detach, 54 owid_activate 55 }; 56 57 struct cfdriver owid_cd = { 58 NULL, "owid", DV_DULL 59 }; 60 61 static const struct onewire_matchfam owid_fams[] = { 62 { ONEWIRE_FAMILY_DS1990 } 63 }; 64 65 int 66 owid_match(struct device *parent, void *match, void *aux) 67 { 68 return (onewire_matchbyfam(aux, owid_fams, nitems(owid_fams))); 69 } 70 71 void 72 owid_attach(struct device *parent, struct device *self, void *aux) 73 { 74 struct owid_softc *sc = (struct owid_softc *)self; 75 struct onewire_attach_args *oa = aux; 76 77 sc->sc_onewire = oa->oa_onewire; 78 sc->sc_rom = oa->oa_rom; 79 80 /* Initialize sensor */ 81 strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname, 82 sizeof(sc->sc_sensordev.xname)); 83 sc->sc_sensor.type = SENSOR_INTEGER; 84 sc->sc_sensor.value = ONEWIRE_ROM_SN(sc->sc_rom); 85 snprintf(sc->sc_sensor.desc, sizeof(sc->sc_sensor.desc), "sn %012llx", 86 ONEWIRE_ROM_SN(oa->oa_rom)); 87 sensor_attach(&sc->sc_sensordev, &sc->sc_sensor); 88 sensordev_install(&sc->sc_sensordev); 89 90 printf("\n"); 91 } 92 93 int 94 owid_detach(struct device *self, int flags) 95 { 96 struct owid_softc *sc = (struct owid_softc *)self; 97 98 sensordev_deinstall(&sc->sc_sensordev); 99 100 return (0); 101 } 102 103 int 104 owid_activate(struct device *self, int act) 105 { 106 struct owid_softc *sc = (struct owid_softc *)self; 107 108 switch (act) { 109 case DVACT_DEACTIVATE: 110 sc->sc_dying = 1; 111 break; 112 } 113 114 return (0); 115 } 116