1 files changed, 93 insertions, 0 deletions

diff --git a/sys/dev/ofw/ofw_pci.c b/sys/dev/ofw/ofw_pci.c
new file mode 100644
index 000000000000..c7ed7c5c8fe9
--- /dev/null
+++ b/sys/dev/ofw/ofw_pci.c
@@ -0,0 +1,93 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2021 Alstom Group.
+ * Copyright (c) 2021 Semihalf.
+ *
+ * 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/kernel.h>
+#include <sys/module.h>
+
+#include <dev/pci/pcireg.h>
+#include <dev/pci/pcivar.h>
+#include <dev/pci/pci_private.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include "pcib_if.h"
+#include "pci_if.h"
+
+static int	ofw_pci_probe(device_t);
+static const struct ofw_bus_devinfo* pci_ofw_get_devinfo(device_t, device_t);
+
+static device_method_t ofw_pci_methods[] = {
+	DEVMETHOD(device_probe,		ofw_pci_probe),
+
+	/* ofw_bus interface */
+	DEVMETHOD(ofw_bus_get_devinfo,	pci_ofw_get_devinfo),
+	DEVMETHOD(ofw_bus_get_compat,	ofw_bus_gen_get_compat),
+	DEVMETHOD(ofw_bus_get_model,	ofw_bus_gen_get_model),
+	DEVMETHOD(ofw_bus_get_name,	ofw_bus_gen_get_name),
+	DEVMETHOD(ofw_bus_get_node,	ofw_bus_gen_get_node),
+	DEVMETHOD(ofw_bus_get_type,	ofw_bus_gen_get_type),
+
+	DEVMETHOD_END
+};
+
+static devclass_t pci_devclass;
+
+DEFINE_CLASS_1(pci, ofw_pci_driver, ofw_pci_methods, sizeof(struct pci_softc),
+    pci_driver);
+DRIVER_MODULE(ofw_pci, pcib, ofw_pci_driver, pci_devclass, 0, 0);
+MODULE_DEPEND(ofw_pci, simplebus, 1, 1, 1);
+MODULE_DEPEND(ofw_pci, pci, 1, 1, 1);
+MODULE_VERSION(ofw_pci, 1);
+
+static int
+ofw_pci_probe(device_t dev)
+{
+	device_t parent;
+
+	parent = device_get_parent(dev);
+	if (ofw_bus_get_node(parent) <= 0)
+		return (ENXIO);
+
+	device_set_desc(dev, "OFW PCI bus");
+	return (BUS_PROBE_DEFAULT);
+}
+
+/* Pass the request up to our parent. */
+static const struct ofw_bus_devinfo*
+pci_ofw_get_devinfo(device_t bus, device_t dev)
+{
+
+	return OFW_BUS_GET_DEVINFO(device_get_parent(bus), dev);
+}