Add an ACPI to ISA psuedo bridge driver. It attaches an isab(4) device to

ACPI nodes with the plug and play ID's defined for a "Generic ISA Bus
Device" as defined in section 10.7 of the ACPI 2.0 specification.  This
gives machines like the Libretto that contain a fake ISA bus that is not
connected via a PCI-ISA bridge an ISA bus for ISA devices to attach to.

Tested by:	markm

1 files changed, 129 insertions, 0 deletions

diff --git a/sys/dev/acpica/acpi_isab.c b/sys/dev/acpica/acpi_isab.c
new file mode 100644
index 0000000..bcb466b
--- /dev/null
+++ b/sys/dev/acpica/acpi_isab.c
@@ -0,0 +1,129 @@
+/*-
+ * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * ISA Bridge driver for Generic ISA Bus Devices.  See section 10.7 of the
+ * ACPI 2.0a specification for details on this device.
+ */
+
+#include "opt_acpi.h"
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/malloc.h>
+#include <sys/kernel.h>
+
+#include "acpi.h"
+
+#include <dev/acpica/acpivar.h>
+#include <isa/isavar.h>
+
+/*
+ * Hooks for the ACPI CA debugging infrastructure
+ */
+#define _COMPONENT	ACPI_BUS
+ACPI_MODULE_NAME("ISA_ACPI")
+
+struct acpi_isab_softc {
+	device_t	ap_dev;
+	ACPI_HANDLE	ap_handle;
+};
+
+
+static int	acpi_isab_probe(device_t bus);
+static int	acpi_isab_attach(device_t bus);
+static int	acpi_isab_read_ivar(device_t dev, device_t child, int which,
+		    uintptr_t *result);
+
+static device_method_t acpi_isab_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		acpi_isab_probe),
+	DEVMETHOD(device_attach,	acpi_isab_attach),
+	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
+	DEVMETHOD(device_suspend,	bus_generic_suspend),
+	DEVMETHOD(device_resume,	bus_generic_resume),
+
+	/* Bus interface */
+	DEVMETHOD(bus_print_child,	bus_generic_print_child),
+	DEVMETHOD(bus_read_ivar,	acpi_isab_read_ivar),
+	DEVMETHOD(bus_alloc_resource,	bus_generic_alloc_resource),
+	DEVMETHOD(bus_release_resource,	bus_generic_release_resource),
+	DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
+	DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
+	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
+	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
+
+	{0, 0}
+};
+
+static driver_t acpi_isab_driver = {
+	"isab",
+	acpi_isab_methods,
+	sizeof(struct acpi_isab_softc),
+};
+
+DRIVER_MODULE(acpi_isab, acpi, acpi_isab_driver, isab_devclass, 0, 0);
+
+static int
+acpi_isab_probe(device_t dev)
+{
+
+	if ((acpi_get_type(dev) == ACPI_TYPE_DEVICE) &&
+	    !acpi_disabled("isa	") &&
+	    (acpi_MatchHid(dev, "PNP0A05") || acpi_MatchHid(dev, "PNP0A06"))) {
+		device_set_desc(dev, "ACPI Generic ISA bridge");
+		return(0);
+	}
+	return(ENXIO);
+}
+
+static int
+acpi_isab_attach(device_t dev)
+{
+	struct acpi_isab_softc *sc;
+
+	ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
+
+	sc = device_get_softc(dev);
+	sc->ap_dev = dev;
+	sc->ap_handle = acpi_get_handle(dev);
+
+	return (isab_attach(dev));
+}
+
+static int
+acpi_isab_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
+{
+	struct acpi_isab_softc *sc = device_get_softc(dev);
+
+	switch (which) {
+	case  ACPI_IVAR_HANDLE:
+		*result = (uintptr_t)sc->ap_handle;
+		return(0);
+	}
+	return(ENOENT);
+}