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
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 const 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
owid_match(struct device * parent,void * match,void * aux)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
owid_attach(struct device * parent,struct device * self,void * aux)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
owid_detach(struct device * self,int flags)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
owid_activate(struct device * self,int act)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