Annotation of sys/dev/acpi/acpibtn.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: acpibtn.c,v 1.15 2006/12/26 23:58:08 marco Exp $ */
2: /*
3: * Copyright (c) 2005 Marco Peereboom <marco@openbsd.org>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16: */
17:
18: #include <sys/param.h>
19: #include <sys/proc.h>
20: #include <sys/signalvar.h>
21: #include <sys/systm.h>
22: #include <sys/device.h>
23: #include <sys/malloc.h>
24:
25: #include <machine/bus.h>
26:
27: #include <dev/acpi/acpireg.h>
28: #include <dev/acpi/acpivar.h>
29: #include <dev/acpi/acpidev.h>
30: #include <dev/acpi/amltypes.h>
31: #include <dev/acpi/dsdt.h>
32:
33: #include <sys/sensors.h>
34:
35: int acpibtn_match(struct device *, void *, void *);
36: void acpibtn_attach(struct device *, struct device *, void *);
37: int acpibtn_notify(struct aml_node *, int, void *);
38:
39: struct acpibtn_softc {
40: struct device sc_dev;
41:
42: bus_space_tag_t sc_iot;
43: bus_space_handle_t sc_ioh;
44:
45: struct acpi_softc *sc_acpi;
46: struct aml_node *sc_devnode;
47:
48: int sc_btn_type;
49: #define ACPIBTN_UNKNOWN -1
50: #define ACPIBTN_LID 0
51: #define ACPIBTN_POWER 1
52: #define ACPIBTN_SLEEP 2
53: };
54:
55: int acpibtn_getsta(struct acpibtn_softc *);
56:
57: struct cfattach acpibtn_ca = {
58: sizeof(struct acpibtn_softc), acpibtn_match, acpibtn_attach
59: };
60:
61: struct cfdriver acpibtn_cd = {
62: NULL, "acpibtn", DV_DULL
63: };
64:
65: int
66: acpibtn_match(struct device *parent, void *match, void *aux)
67: {
68: struct acpi_attach_args *aa = aux;
69: struct cfdata *cf = match;
70:
71: /* sanity */
72: if (aa->aaa_name == NULL ||
73: strcmp(aa->aaa_name, cf->cf_driver->cd_name) != 0 ||
74: aa->aaa_table != NULL)
75: return (0);
76:
77: return (1);
78: }
79:
80: void
81: acpibtn_attach(struct device *parent, struct device *self, void *aux)
82: {
83: struct acpibtn_softc *sc = (struct acpibtn_softc *)self;
84: struct acpi_attach_args *aa = aux;
85:
86: sc->sc_acpi = (struct acpi_softc *)parent;
87: sc->sc_devnode = aa->aaa_node->child;
88:
89: if (!strcmp(aa->aaa_dev, ACPI_DEV_LD))
90: sc->sc_btn_type = ACPIBTN_LID;
91: else if (!strcmp(aa->aaa_dev, ACPI_DEV_PBD))
92: sc->sc_btn_type = ACPIBTN_POWER;
93: else if (!strcmp(aa->aaa_dev, ACPI_DEV_SBD))
94: sc->sc_btn_type = ACPIBTN_SLEEP;
95: else
96: sc->sc_btn_type = ACPIBTN_UNKNOWN;
97:
98: acpibtn_getsta(sc);
99:
100: printf(": %s\n", sc->sc_devnode->parent->name);
101:
102: aml_register_notify(sc->sc_devnode->parent, aa->aaa_dev, acpibtn_notify,
103: sc, ACPIDEV_NOPOLL);
104: }
105:
106: int
107: acpibtn_getsta(struct acpibtn_softc *sc)
108: {
109: if (aml_evalname(sc->sc_acpi, sc->sc_devnode, "_STA", 0, NULL, NULL) != 0) {
110: dnprintf(20, "%s: no _STA\n", DEVNAME(sc));
111: /* XXX not all buttons have _STA so FALLTROUGH */
112: }
113:
114: return (0);
115: }
116:
117: int
118: acpibtn_notify(struct aml_node *node, int notify_type, void *arg)
119: {
120: struct acpibtn_softc *sc = arg;
121: extern int acpi_s5;
122:
123: dnprintf(10, "acpibtn_notify: %.2x %s\n", notify_type,
124: sc->sc_devnode->parent->name);
125:
126: switch (sc->sc_btn_type) {
127: case ACPIBTN_LID:
128: case ACPIBTN_SLEEP:
129: break;
130: case ACPIBTN_POWER:
131: if (notify_type == 0x80) {
132: acpi_s5 = 1;
133: psignal(initproc, SIGUSR1);
134: }
135: break;
136: default:
137: printf("%s: spurious acpi button interrupt %i\n", DEVNAME(sc),
138: sc->sc_btn_type);
139: break;
140: }
141:
142: return (0);
143: }
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