1 files changed, 120 insertions, 0 deletions
diff --git a/sys/dev/bhnd/bhnd_nexus.c b/sys/dev/bhnd/bhnd_nexus.c
new file mode 100644
index 0000000..a7bb36e
--- /dev/null
+++ b/sys/dev/bhnd/bhnd_nexus.c
@@ -0,0 +1,120 @@
+/*-
+ * Copyright (c) 2015-2016 Landon Fuller <landon@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,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
+ *    redistribution must be conditioned upon including a substantially
+ *    similar Disclaimer requirement for further binary redistribution.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
+ * 
+ * $FreeBSD$
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+
+/*
+ * bhnd(4) driver mix-in providing shared common methods for
+ * bhnd bus devices attached via a root nexus.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/rman.h>
+#include <sys/malloc.h>
+
+#include <machine/bus.h>
+
+#include <dev/bhnd/bhnd_ids.h>
+#include <dev/bhnd/cores/chipc/chipcreg.h>
+
+#include "bhnd_nexusvar.h"
+
+static const struct resource_spec bhnd_nexus_res_spec[] = {
+	{ SYS_RES_MEMORY,	0,	RF_ACTIVE },	/* chipc registers */
+	{ -1,			0,	0 }
+};
+
+/**
+ * Map ChipCommon's register block and read the chip identifier data.
+ * 
+ * @param dev A bhnd_nexus device.
+ * @param chipid On success, will be populated with the chip identifier.
+ * @retval 0 success
+ * @retval non-zero An error occurred reading the chip identifier..
+ */
+int
+bhnd_nexus_read_chipid(device_t dev, struct bhnd_chipid *chipid)
+{
+	struct resource_spec	rspec[nitems(bhnd_nexus_res_spec)];
+	int			error;
+
+	memcpy(rspec, bhnd_nexus_res_spec, sizeof(rspec));
+	error = bhnd_read_chipid(dev, rspec, 0, chipid);
+	if (error)
+		device_printf(dev, "error %d reading chip ID\n", error);
+
+	return (error);
+}
+
+static bool
+bhnd_nexus_is_hw_disabled(device_t dev, device_t child)
+{
+	return false;
+}
+
+static bhnd_attach_type
+bhnd_nexus_get_attach_type(device_t dev, device_t child)
+{
+	return (BHND_ATTACH_NATIVE);
+}
+
+static int
+bhnd_nexus_activate_resource(device_t dev, device_t child, int type, int rid,
+    struct bhnd_resource *r)
+{
+	int error;
+
+	/* Always direct */
+	if ((error = bus_activate_resource(child, type, rid, r->res)))
+		return (error);
+
+	r->direct = true;
+	return (0);
+}
+
+
+static device_method_t bhnd_nexus_methods[] = {
+	/* bhnd interface */
+	DEVMETHOD(bhnd_bus_activate_resource,	bhnd_nexus_activate_resource),
+	DEVMETHOD(bhnd_bus_is_hw_disabled,	bhnd_nexus_is_hw_disabled),
+	DEVMETHOD(bhnd_bus_get_attach_type,	bhnd_nexus_get_attach_type),
+
+	DEVMETHOD_END
+};
+
+DEFINE_CLASS_0(bhnd, bhnd_nexus_driver, bhnd_nexus_methods,
+    sizeof(struct bhnd_softc));