1 /* $OpenBSD: owid.c,v 1.6 2008/10/25 00:27:09 deraadt 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 snprintf(sc->sc_sensor.desc, sizeof(sc->sc_sensor.desc), "sn %012llx", 89 ONEWIRE_ROM_SN(oa->oa_rom)); 90 sensor_attach(&sc->sc_sensordev, &sc->sc_sensor); 91 sensordev_install(&sc->sc_sensordev); 92 93 printf("\n"); 94 } 95 96 int 97 owid_detach(struct device *self, int flags) 98 { 99 struct owid_softc *sc = (struct owid_softc *)self; 100 101 sensordev_deinstall(&sc->sc_sensordev); 102 103 return (0); 104 } 105 106 int 107 owid_activate(struct device *self, enum devact act) 108 { 109 struct owid_softc *sc = (struct owid_softc *)self; 110 111 switch (act) { 112 case DVACT_ACTIVATE: 113 break; 114 case DVACT_DEACTIVATE: 115 sc->sc_dying = 1; 116 break; 117 } 118 119 return (0); 120 } 121