1 /* $OpenBSD: acpige.c,v 1.2 2022/04/06 18:59:27 naddy Exp $ */
2 /*
3 * Copyright (c) 2020 Patrick Wildt <patrick@blueri.se>
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/malloc.h>
20 #include <sys/systm.h>
21 #include <sys/tty.h>
22
23 #include <dev/acpi/acpireg.h>
24 #include <dev/acpi/acpivar.h>
25 #include <dev/acpi/acpidev.h>
26 #include <dev/acpi/amltypes.h>
27 #include <dev/acpi/dsdt.h>
28
29 struct acpige_softc;
30 struct acpige_irq {
31 struct acpige_softc *ai_sc;
32 void *ai_ih;
33 uint32_t ai_irq;
34 };
35
36 struct acpige_softc {
37 struct device sc_dev;
38 struct acpi_softc *sc_acpi;
39 struct aml_node *sc_devnode;
40 struct acpige_irq *sc_irq;
41 };
42
43 int acpige_match(struct device *, void *, void *);
44 void acpige_attach(struct device *, struct device *, void *);
45
46 int acpige_intr(void *);
47 void acpige_event_task(void *, int);
48
49 const struct cfattach acpige_ca = {
50 sizeof(struct acpige_softc), acpige_match, acpige_attach
51 };
52
53 struct cfdriver acpige_cd = {
54 NULL, "acpige", DV_DULL
55 };
56
57 const char *acpige_hids[] = {
58 "ACPI0013",
59 NULL
60 };
61
62 int
acpige_match(struct device * parent,void * match,void * aux)63 acpige_match(struct device *parent, void *match, void *aux)
64 {
65 struct acpi_attach_args *aaa = aux;
66 struct cfdata *cf = match;
67
68 return acpi_matchhids(aaa, acpige_hids, cf->cf_driver->cd_name);
69 }
70
71 void
acpige_attach(struct device * parent,struct device * self,void * aux)72 acpige_attach(struct device *parent, struct device *self, void *aux)
73 {
74 struct acpige_softc *sc = (struct acpige_softc *)self;
75 struct acpi_attach_args *aaa = aux;
76 struct acpige_irq *ai;
77 int i;
78
79 sc->sc_acpi = (struct acpi_softc *)parent;
80 sc->sc_devnode = aaa->aaa_node;
81
82 if (aaa->aaa_nirq < 1) {
83 printf(": no interrupt\n");
84 return;
85 }
86
87 sc->sc_irq = mallocarray(aaa->aaa_nirq, sizeof(struct acpige_irq),
88 M_DEVBUF, M_WAITOK);
89
90 for (i = 0; i < aaa->aaa_nirq; i++) {
91 printf("%s %d", i ? "," : " irq", aaa->aaa_irq[i]);
92 ai = &sc->sc_irq[i];
93 ai->ai_sc = sc;
94 ai->ai_irq = aaa->aaa_irq[i];
95 ai->ai_ih = acpi_intr_establish(aaa->aaa_irq[i],
96 aaa->aaa_irq_flags[i], IPL_BIO, acpige_intr, ai,
97 sc->sc_dev.dv_xname);
98 if (ai->ai_ih == NULL) {
99 printf(": can't establish interrupt\n");
100 return;
101 }
102 }
103
104 printf("\n");
105 }
106
107 int
acpige_intr(void * arg)108 acpige_intr(void *arg)
109 {
110 struct acpige_irq *ai = arg;
111 struct acpige_softc *sc = ai->ai_sc;
112
113 acpi_addtask(sc->sc_acpi, acpige_event_task, sc, ai->ai_irq);
114 acpi_wakeup(sc->sc_acpi);
115 return 1;
116 }
117
118 void
acpige_event_task(void * arg0,int irq)119 acpige_event_task(void *arg0, int irq)
120 {
121 struct acpige_softc *sc = arg0;
122 struct aml_value cmd;
123
124 memset(&cmd, 0, sizeof cmd);
125 cmd.v_integer = irq;
126 cmd.type = AML_OBJTYPE_INTEGER;
127 aml_evalname(sc->sc_acpi, sc->sc_devnode, "_EVT", 1, &cmd, NULL);
128 }
129