Add support for the dwc usb in the HiSilicon hi6220 in the HiKey board. For

this we need to force the driver into host mode, as without this the driver
fails to detect any devices.

Relnotes:	yes
Sponsored by:	ABT Systems Ltd

sys/arm64/conf/GENERIC

@@ -116,6 +116,11 @@ device		dwmmc
 device		uart		# Generic UART driver
 device		pl011
 
+# USB support
+options 	USB_DEBUG		# enable debug msgs
+device		dwcotg			# DWC OTG controller
+device		usb			# USB Bus (required)
+
 # Pseudo devices.
 device		loop		# Network loopback
 device		random		# Entropy device

sys/conf/files.arm64

@@ -67,6 +67,7 @@ dev/psci/psci.c			optional	psci
 dev/psci/psci_arm64.S		optional	psci
 dev/uart/uart_cpu_fdt.c		optional	uart fdt
 dev/uart/uart_dev_pl011.c	optional	uart pl011
+dev/usb/controller/dwc_otg_hisi.c optional	dwcotg soc_hisi_hi6220
 kern/kern_clocksource.c		standard
 kern/subr_dummy_vdso_tc.c	standard
 libkern/bcmp.c			standard

sys/dev/usb/controller/dwc_otg_hisi.c

@@ -0,0 +1,97 @@
+/*
+ * Copyright 2015 Andrew Turner.
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/bus.h>
+#include <sys/callout.h>
+#include <sys/condvar.h>
+#include <sys/module.h>
+
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <dev/usb/usb.h>
+#include <dev/usb/usbdi.h>
+
+#include <dev/usb/usb_busdma.h>
+#include <dev/usb/usb_process.h>
+
+#include <dev/usb/usb_controller.h>
+#include <dev/usb/usb_bus.h>
+
+#include <dev/usb/controller/dwc_otg.h>
+#include <dev/usb/controller/dwc_otg_fdt.h>
+
+static device_probe_t hisi_dwc_otg_probe;
+static device_attach_t hisi_dwc_otg_attach;
+
+static int
+hisi_dwc_otg_probe(device_t dev)
+{
+
+	if (!ofw_bus_status_okay(dev))
+		return (ENXIO);
+
+	if (!ofw_bus_is_compatible(dev, "huawei,hisi-usb"))
+		return (ENXIO);
+
+	device_set_desc(dev, "DWC OTG 2.0 integrated USB controller (hisilicon)");
+
+	return (BUS_PROBE_VENDOR);
+}
+
+static int
+hisi_dwc_otg_attach(device_t dev)
+{
+	struct dwc_otg_fdt_softc *sc;
+
+	/* Set the default to host mode. */
+	/* TODO: Use vbus to detect this. */
+	sc = device_get_softc(dev);
+	sc->sc_otg.sc_mode = DWC_MODE_HOST;
+
+	return (dwc_otg_attach(dev));
+}
+
+static device_method_t hisi_dwc_otg_methods[] = {
+	/* bus interface */
+	DEVMETHOD(device_probe, hisi_dwc_otg_probe),
+	DEVMETHOD(device_attach, hisi_dwc_otg_attach),
+
+	DEVMETHOD_END
+};
+
+static devclass_t hisi_dwc_otg_devclass;
+
+DEFINE_CLASS_1(hisi_dwcotg, hisi_dwc_otg_driver, hisi_dwc_otg_methods,
+    sizeof(struct dwc_otg_fdt_softc), dwc_otg_driver);
+DRIVER_MODULE(hisi_dwcotg, simplebus, hisi_dwc_otg_driver,
+    hisi_dwc_otg_devclass, 0, 0);
+MODULE_DEPEND(hisi_dwcotg, usb, 1, 1, 1);