1 files changed, 83 insertions, 0 deletions
diff --git a/sys/dev/uart/uart_bus_acpi.c b/sys/dev/uart/uart_bus_acpi.c
new file mode 100644
index 0000000..ac75f0c
--- /dev/null
+++ b/sys/dev/uart/uart_bus_acpi.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2001 M. Warner Losh.  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 ``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/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/conf.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <machine/bus.h>
+#include <sys/rman.h>
+#include <machine/resource.h>
+
+#include <isa/isavar.h>
+
+#include <dev/uart/uart.h>
+#include <dev/uart/uart_bus.h>
+
+static int uart_acpi_probe(device_t dev);
+
+static device_method_t uart_acpi_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		uart_acpi_probe),
+	DEVMETHOD(device_attach,	uart_bus_attach),
+	DEVMETHOD(device_detach,	uart_bus_detach),
+	{ 0, 0 }
+};
+
+static driver_t uart_acpi_driver = {
+	uart_driver_name,
+	uart_acpi_methods,
+	sizeof(struct uart_softc),
+};
+
+static struct isa_pnp_id acpi_ns8250_ids[] = {
+	{0x0005d041, "Standard PC COM port"},		/* PNP0500 */
+	{0x0105d041, "16550A-compatible COM port"},	/* PNP0501 */
+	{0}
+};
+
+static int
+uart_acpi_probe(device_t dev)
+{
+	struct uart_softc *sc;
+	device_t parent;
+
+	parent = device_get_parent(dev);
+	sc = device_get_softc(dev);
+
+	if (!ISA_PNP_PROBE(parent, dev, acpi_ns8250_ids)) {
+		sc->sc_class = &uart_ns8250_class;
+		return (uart_bus_probe(dev, 0, 0, 0));
+	}
+
+	/* Add checks for non-ns8250 IDs here. */
+	return (ENXIO);
+}
+
+DRIVER_MODULE(uart, acpi, uart_acpi_driver, uart_devclass, 0, 0);