Add a MacIO bus attachment. The Z8530 as present in the Mac needs

a different register shift and is fed by a different clock than
we use for UltraSPARC hardware. To deal with this, the regshft and
rclk fields in the class structure are removed and bus frontends
now pass the right regshft and rclk to the probe function where
they're put in the BAS and passed in to subordinate drivers.

1 files changed, 87 insertions, 0 deletions

diff --git a/sys/dev/scc/scc_bfe_macio.c b/sys/dev/scc/scc_bfe_macio.c
new file mode 100644
index 0000000..e0e7318
--- /dev/null
+++ b/sys/dev/scc/scc_bfe_macio.c
@@ -0,0 +1,87 @@
+/*-
+ * Copyright (c) 2006 Marcel Moolenaar
+ * 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 <dev/ofw/ofw_bus.h>
+
+#include <machine/bus.h>
+#include <sys/rman.h>
+#include <machine/resource.h>
+
+#include <dev/scc/scc_bfe.h>
+
+#define	MACIO_REGSHFT	4
+#define	MACIO_RCLK	230400
+
+static int
+scc_macio_probe(device_t dev)
+{
+	struct scc_softc *sc;
+	const char *nm;
+
+	sc = device_get_softc(dev);
+	nm = ofw_bus_get_name(dev);
+	if (!strcmp(nm, "escc")) {
+		device_set_desc(dev, "Zilog Z8530 dual channel SCC");
+		sc->sc_class = &scc_z8530_class;
+		return (scc_bfe_probe(dev, MACIO_REGSHFT, MACIO_RCLK));
+	}
+	return (ENXIO);
+}
+
+static device_method_t scc_macio_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		scc_macio_probe),
+	DEVMETHOD(device_attach,	scc_bfe_attach),
+	DEVMETHOD(device_detach,	scc_bfe_detach),
+
+	DEVMETHOD(bus_alloc_resource,	scc_bus_alloc_resource),
+	DEVMETHOD(bus_release_resource,	scc_bus_release_resource),
+	DEVMETHOD(bus_get_resource,	scc_bus_get_resource),
+	DEVMETHOD(bus_read_ivar,	scc_bus_read_ivar),
+	DEVMETHOD(bus_setup_intr,	scc_bus_setup_intr),
+	DEVMETHOD(bus_teardown_intr,	scc_bus_teardown_intr),
+	DEVMETHOD(bus_print_child,	bus_generic_print_child),
+	DEVMETHOD(bus_driver_added,	bus_generic_driver_added),
+	{ 0, 0 }
+};
+
+static driver_t scc_macio_driver = {
+	scc_driver_name,
+	scc_macio_methods,
+	sizeof(struct scc_softc),
+};
+
+DRIVER_MODULE(scc, macio, scc_macio_driver, scc_devclass, 0, 0);