Add acpige(4), a driver for ACPI generic event devices. This is a rather

simple device that simply reacts to interrupts by invoking _EVT with the
interrupt number.  This is used on the HoneyComb LX2K to implement power
button handling.

ok kettenis@

2 files changed, 134 insertions, 1 deletions

diff --git a/sys/dev/acpi/acpige.c b/sys/dev/acpi/acpige.c
new file mode 100644
index 00000000000..1606f1db55c
--- /dev/null
+++ b/sys/dev/acpi/acpige.c
@@ -0,0 +1,128 @@
+/*	$OpenBSD: acpige.c,v 1.1 2020/11/15 18:04:10 patrick Exp $	*/
+/*
+ * Copyright (c) 2020 Patrick Wildt <patrick@blueri.se>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/param.h>
+#include <sys/malloc.h>
+#include <sys/systm.h>
+#include <sys/tty.h>
+
+#include <dev/acpi/acpireg.h>
+#include <dev/acpi/acpivar.h>
+#include <dev/acpi/acpidev.h>
+#include <dev/acpi/amltypes.h>
+#include <dev/acpi/dsdt.h>
+
+struct acpige_softc;
+struct acpige_irq {
+	struct acpige_softc	*ai_sc;
+	void			*ai_ih;
+	uint32_t		ai_irq;
+};
+
+struct acpige_softc {
+	struct device		sc_dev;
+	struct acpi_softc	*sc_acpi;
+	struct aml_node		*sc_devnode;
+	struct acpige_irq	*sc_irq;
+};
+
+int	acpige_match(struct device *, void *, void *);
+void	acpige_attach(struct device *, struct device *, void *);
+
+int	acpige_intr(void *);
+void	acpige_event_task(void *, int);
+
+struct cfattach acpige_ca = {
+	sizeof(struct acpige_softc), acpige_match, acpige_attach
+};
+
+struct cfdriver acpige_cd = {
+	NULL, "acpige", DV_DULL
+};
+
+const char *acpige_hids[] = {
+	"ACPI0013",
+	NULL
+};
+
+int
+acpige_match(struct device *parent, void *match, void *aux)
+{
+	struct acpi_attach_args *aaa = aux;
+	struct cfdata *cf = match;
+
+	return acpi_matchhids(aaa, acpige_hids, cf->cf_driver->cd_name);
+}
+
+void
+acpige_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct acpige_softc *sc = (struct acpige_softc *)self;
+	struct acpi_attach_args *aaa = aux;
+	struct acpige_irq *ai;
+	int i;
+
+	sc->sc_acpi = (struct acpi_softc *)parent;
+	sc->sc_devnode = aaa->aaa_node;
+
+	if (aaa->aaa_nirq < 1) {
+		printf(": no interrupt\n");
+		return;
+	}
+
+	sc->sc_irq = mallocarray(aaa->aaa_nirq, sizeof(struct acpige_irq),
+	    M_DEVBUF, M_WAITOK);
+
+	for (i = 0; i < aaa->aaa_nirq; i++) {
+		printf("%s %d", i ? "," : " irq", aaa->aaa_irq[i]);
+		ai = &sc->sc_irq[i];
+		ai->ai_sc = sc;
+		ai->ai_irq = aaa->aaa_irq[i];
+		ai->ai_ih = acpi_intr_establish(aaa->aaa_irq[i],
+		    aaa->aaa_irq_flags[i], IPL_BIO, acpige_intr, ai,
+		    sc->sc_dev.dv_xname);
+		if (ai->ai_ih == NULL) {
+			printf(": can't establish interrupt\n");
+			return;
+		}
+	}
+
+	printf("\n");
+}
+
+int
+acpige_intr(void *arg)
+{
+	struct acpige_irq *ai = arg;
+	struct acpige_softc *sc = ai->ai_sc;
+
+	acpi_addtask(sc->sc_acpi, acpige_event_task, sc, ai->ai_irq);
+	acpi_wakeup(sc->sc_acpi);
+	return 1;
+}
+
+void
+acpige_event_task(void *arg0, int irq)
+{
+	struct acpige_softc *sc = arg0;
+	struct aml_value cmd;
+
+	memset(&cmd, 0, sizeof cmd);
+	cmd.v_integer = irq;
+	cmd.type = AML_OBJTYPE_INTEGER;
+	aml_evalname(sc->sc_acpi, sc->sc_devnode, "_EVT", 1, &cmd, NULL);
+}
diff --git a/sys/dev/acpi/files.acpi b/sys/dev/acpi/files.acpi
index 1d14299b54f..0e6e8f02992 100644
--- a/sys/dev/acpi/files.acpi
+++ b/sys/dev/acpi/files.acpi
@@ -1,4 +1,4 @@
-#	$OpenBSD: files.acpi,v 1.59 2020/11/15 16:47:12 kettenis Exp $
+#	$OpenBSD: files.acpi,v 1.60 2020/11/15 18:04:10 patrick Exp $
 #
 # Config file and device description for machine-independent ACPI code.
 # Included by ports that need it.
@@ -50,6 +50,11 @@ device	acpiec
 attach	acpiec at acpi
 file	dev/acpi/acpiec.c		acpiec
 
+# Generic Event
+device	acpige
+attach	acpige at acpi
+file	dev/acpi/acpige.c		acpige
+
 # Thermal Zone
 device	acpitz
 attach	acpitz at acpi