The gpio module is used on newer laptops to route that adb interrupt.

From Nbsd.

1 files changed, 184 insertions, 0 deletions

diff --git a/sys/arch/powerpc/mac/gpio.c b/sys/arch/powerpc/mac/gpio.c
new file mode 100644
index 00000000000..0e568f1570b
--- /dev/null
+++ b/sys/arch/powerpc/mac/gpio.c
@@ -0,0 +1,184 @@
+/*	$NetBSD: gpio.c,v 1.2 2001/02/27 05:16:33 matt Exp $	*/
+
+/*-
+ * Copyright (C) 1998	Internet Research Institute, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by
+ *	Internet Research Institute, Inc.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/device.h>
+#include <sys/malloc.h>
+#include <machine/autoconf.h>
+#include <machine/pio.h>
+
+#include "adb.h"
+
+static void gpio_obio_attach (struct device *, struct device *, void *);
+static int gpio_obio_match (struct device *, void *, void *);
+static int gpio_obio_print (void *aux, const char *gpio);
+
+static void gpio_gpio_attach (struct device *, struct device *, void *);
+static int gpio_gpio_match (struct device *, void *, void *);
+static int gpio_intr (void *);
+
+struct gpio_softc {
+	struct device sc_dev;
+	u_int8_t *sc_port;
+};
+
+struct cfattach gpio_obio_ca = {
+	sizeof(struct gpio_softc), gpio_obio_match, gpio_obio_attach
+};
+
+struct cfattach gpio_gpio_ca = {
+	sizeof(struct gpio_softc), gpio_gpio_match, gpio_gpio_attach
+};
+
+struct cfdriver gpio_cd = {
+	NULL, "gpio_obio", DV_DULL
+};
+
+int
+gpio_obio_match(struct device *parent, void *cf, void *aux)
+{
+	struct confargs *ca = aux;
+
+	if (strcmp(ca->ca_name, "gpio") != 0)
+		return 0;
+
+	if (ca->ca_nreg == 0)
+		return 0;
+
+	return 1;
+}
+
+void
+gpio_obio_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct gpio_softc *sc = (struct gpio_softc *)self;
+	struct confargs *ca = aux, ca2;
+	int child;
+	int namelen;
+	int intr[6];
+	u_int reg[20];
+	char name[32];
+
+	printf("\n");
+
+	sc->sc_port = mapiodev(ca->ca_baseaddr + ca->ca_reg[0], ca->ca_reg[1]);
+
+	ca2.ca_baseaddr = ca->ca_baseaddr;
+	for (child = OF_child(ca->ca_node); child; child = OF_peer(child)) {
+		namelen = OF_getprop(child, "name", name, sizeof(name));
+		if (namelen < 0)
+			continue;
+		if (namelen >= sizeof(name))
+			continue;
+
+		name[namelen] = 0;
+		ca2.ca_name = name;
+		ca2.ca_node = child;
+
+		ca2.ca_nreg  = OF_getprop(child, "reg", reg, sizeof(reg));
+		ca2.ca_nintr = OF_getprop(child, "AAPL,interrupts", intr,
+				sizeof(intr));
+		if (ca2.ca_nintr == -1)
+			ca2.ca_nintr = OF_getprop(child, "interrupts", intr,
+					sizeof(intr));
+
+		ca2.ca_reg = reg;
+		ca2.ca_intr = intr;
+
+		config_found(self, &ca2, gpio_obio_print);
+	}
+}
+
+int
+gpio_obio_print(void *aux, const char *gpio)
+{
+	struct confargs *ca = aux;
+
+	if (gpio)
+		printf("%s at %s", ca->ca_name, gpio);
+
+	if (ca->ca_nreg > 0)
+		printf(" offset 0x%x", ca->ca_reg[0]);
+
+	return UNCONF;
+}
+
+int
+gpio_gpio_match(struct device *parent, void *cf, void *aux)
+{
+	struct confargs *ca = aux;
+
+	if (strcmp(ca->ca_name, "extint-gpio1") != 0)
+		return 0;
+
+	if (ca->ca_nintr < 0)
+		return 0;
+
+	return 1;
+}
+
+void
+gpio_gpio_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct gpio_softc *sc = (struct gpio_softc *)self;
+	struct confargs *ca = aux;
+
+
+	sc->sc_port = ((struct gpio_softc *) parent)->sc_port;
+	mac_intr_establish(parent, ca->ca_intr[0], IST_LEVEL, IPL_HIGH,
+	gpio_intr, sc, "gpio/adb");
+
+	printf(" irq %d\n", ca->ca_intr[0]);
+}
+
+#if NADB > 0
+extern int adb_intr (void *);
+extern struct cfdriver adb_cd;
+#endif
+
+int
+gpio_intr(void *arg)
+{
+	struct gpio_softc *sc = arg;
+	int rv = 0;
+
+#if NADB > 0
+	if (adb_cd.cd_devs[0] != NULL)
+		rv = adb_intr(adb_cd.cd_devs[0]);
+#endif
+
+	return rv;
+}