1/* $OpenBSD: owid.c,v 1.12 2022/04/06 18:59:29 naddy 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 32struct 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 44int owid_match(struct device *, void *, void *); 45void owid_attach(struct device *, struct device *, void *); 46int owid_detach(struct device *, int); 47int owid_activate(struct device *, int); 48 49const struct cfattach owid_ca = { 50 sizeof(struct owid_softc), 51 owid_match, 52 owid_attach, 53 owid_detach, 54 owid_activate 55}; 56 57struct cfdriver owid_cd = { 58 NULL, "owid", DV_DULL 59}; 60 61static const struct onewire_matchfam owid_fams[] = { 62 { ONEWIRE_FAMILY_DS1990 } 63}; 64 65int 66owid_match(struct device *parent, void *match, void *aux) 67{ 68 return (onewire_matchbyfam(aux, owid_fams, nitems(owid_fams))); 69} 70 71void 72owid_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 93int 94owid_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 103int 104owid_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