Initial import of Ralink/Mediatek MIPS SoC support #5

USB support

This revision adds USB (EHCI/OHCI/OTG, depending on SoC type) support for
various Ralink/Mediatek SoCs.
Currently USB is not supported on MT7621, this will be a future addition.

A USB PHY driver is also included, so that we can properly initialize the
USB PHY (e.g., clocks, resets, registers where needed), before attempting
to initialize EHCI/OHCI/OTG functionality.

Approved by:	adrian (mentor)
Sponsored by:	Smartcom - Bulgaria AD
Differential Revision:	https://reviews.freebsd.org/D5841

5 files changed, 1046 insertions, 0 deletions

diff --git a/sys/mips/mediatek/mtk_dotg.c b/sys/mips/mediatek/mtk_dotg.c
new file mode 100644
index 0000000..d7421ad
--- /dev/null
+++ b/sys/mips/mediatek/mtk_dotg.c
@@ -0,0 +1,220 @@
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*-
+ * Copyright (c) 2015-2016 Stanislav Galabov. All rights reserved.
+ * Copyright (c) 2010,2011 Aleksandr Rybalko. All rights reserved.
+ * Copyright (c) 2007-2008 Hans Petter Selasky. 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/stdint.h>
+#include <sys/stddef.h>
+#include <sys/param.h>
+#include <sys/queue.h>
+#include <sys/types.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/bus.h>
+#include <sys/module.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/condvar.h>
+#include <sys/sysctl.h>
+#include <sys/sx.h>
+#include <sys/unistd.h>
+#include <sys/callout.h>
+#include <sys/malloc.h>
+#include <sys/priv.h>
+#include <sys/rman.h>
+
+#include <dev/usb/usb.h>
+#include <dev/usb/usbdi.h>
+
+#include <dev/usb/usb_core.h>
+#include <dev/usb/usb_busdma.h>
+#include <dev/usb/usb_process.h>
+#include <dev/usb/usb_util.h>
+
+#include <dev/usb/usb_controller.h>
+#include <dev/usb/usb_bus.h>
+
+#include <dev/usb/controller/dwc_otg.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#define	MEM_RID	0
+
+static device_probe_t dotg_fdt_probe;
+static device_attach_t dotg_fdt_attach;
+static device_detach_t dotg_fdt_detach;
+
+static int
+dotg_fdt_probe(device_t dev)
+{
+
+	if (!ofw_bus_status_okay(dev))
+		return (ENXIO);
+
+	if (!ofw_bus_is_compatible(dev, "ralink,rt3050-otg"))
+		return (ENXIO);
+
+	device_set_desc(dev, "MTK DWC-OTG USB Controller");
+	return (0);
+}
+
+static int
+dotg_fdt_attach(device_t dev)
+{
+	struct dwc_otg_softc *sc = device_get_softc(dev);
+	int err, rid;
+
+	/* setup controller interface softc */
+
+	/* initialise some bus fields */
+	sc->sc_mode = DWC_MODE_HOST;
+	sc->sc_bus.parent = dev;
+	sc->sc_bus.devices = sc->sc_devices;
+	sc->sc_bus.devices_max = DWC_OTG_MAX_DEVICES;
+	sc->sc_bus.dma_bits = 32;
+
+	/* get all DMA memory */
+	if (usb_bus_mem_alloc_all(&sc->sc_bus,
+	    USB_GET_DMA_TAG(dev), NULL)) {
+		printf("No mem\n");
+		return (ENOMEM);
+	}
+	rid = 0;
+	sc->sc_io_res =
+	    bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
+	if (!(sc->sc_io_res)) {
+		printf("Can`t alloc MEM\n");
+		goto error;
+	}
+	sc->sc_io_tag = rman_get_bustag(sc->sc_io_res);
+	sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
+	sc->sc_io_size = rman_get_size(sc->sc_io_res);
+
+	rid = 0;
+	sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, 
+	    &rid, RF_ACTIVE);
+	if (!(sc->sc_irq_res)) {
+		printf("Can`t alloc IRQ\n");
+		goto error;
+	}
+
+	sc->sc_bus.bdev = device_add_child(dev, "usbus", -1);
+	if (!(sc->sc_bus.bdev)) {
+		printf("Can`t add usbus\n");
+		goto error;
+	}
+	device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
+
+	err = bus_setup_intr(dev, sc->sc_irq_res,
+	    INTR_TYPE_TTY | INTR_MPSAFE, dwc_otg_filter_interrupt,
+	    dwc_otg_interrupt, sc, &sc->sc_intr_hdl);
+	if (err) {
+		sc->sc_intr_hdl = NULL;
+		printf("Can`t set IRQ handle\n");
+		goto error;
+	}
+
+	err = dwc_otg_init(sc);
+	if (err) printf("dotg_init fail\n");
+	if (!err) {
+		err = device_probe_and_attach(sc->sc_bus.bdev);
+		if (err) printf("device_probe_and_attach fail %d\n", err);
+	}
+	if (err) {
+		goto error;
+	}
+	return (0);
+
+error:
+	dotg_fdt_detach(dev);
+	return (ENXIO);
+}
+
+static int
+dotg_fdt_detach(device_t dev)
+{
+	struct dwc_otg_softc *sc = device_get_softc(dev);
+	device_t bdev;
+	int err;
+
+	if (sc->sc_bus.bdev) {
+		bdev = sc->sc_bus.bdev;
+		device_detach(bdev);
+		device_delete_child(dev, bdev);
+	}
+	/* during module unload there are lots of children leftover */
+	device_delete_children(dev);
+
+	if (sc->sc_irq_res && sc->sc_intr_hdl) {
+		/*
+		 * only call dotg_fdt_uninit() after dotg_fdt_init()
+		 */
+		dwc_otg_uninit(sc);
+
+		err = bus_teardown_intr(dev, sc->sc_irq_res,
+		    sc->sc_intr_hdl);
+		sc->sc_intr_hdl = NULL;
+	}
+	if (sc->sc_irq_res) {
+		bus_release_resource(dev, SYS_RES_IRQ, 0,
+		    sc->sc_irq_res);
+		sc->sc_irq_res = NULL;
+	}
+	if (sc->sc_io_res) {
+		bus_release_resource(dev, SYS_RES_MEMORY, 0,
+		    sc->sc_io_res);
+		sc->sc_io_res = NULL;
+	}
+	usb_bus_mem_free_all(&sc->sc_bus, NULL);
+
+	return (0);
+}
+
+static device_method_t dotg_fdt_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe, dotg_fdt_probe),
+	DEVMETHOD(device_attach, dotg_fdt_attach),
+	DEVMETHOD(device_detach, dotg_fdt_detach),
+	DEVMETHOD(device_suspend, bus_generic_suspend),
+	DEVMETHOD(device_resume, bus_generic_resume),
+	DEVMETHOD(device_shutdown, bus_generic_shutdown),
+
+	DEVMETHOD_END
+};
+
+static driver_t dotg_fdt_driver = {
+	.name = "dwcotg",
+	.methods = dotg_fdt_methods,
+	.size = sizeof(struct dwc_otg_softc),
+};
+
+static devclass_t dotg_fdt_devclass;
+
+DRIVER_MODULE(dotg, simplebus, dotg_fdt_driver, dotg_fdt_devclass, 0, 0);
diff --git a/sys/mips/mediatek/mtk_ehci.c b/sys/mips/mediatek/mtk_ehci.c
new file mode 100644
index 0000000..109a32a
--- /dev/null
+++ b/sys/mips/mediatek/mtk_ehci.c
@@ -0,0 +1,223 @@
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*-
+ * Copyright (c) 2015 Stanislav Galabov. All rights reserved.
+ * Copyright (c) 2010,2011 Aleksandr Rybalko. All rights reserved.
+ * Copyright (c) 2007-2008 Hans Petter Selasky. 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/stdint.h>
+#include <sys/stddef.h>
+#include <sys/param.h>
+#include <sys/queue.h>
+#include <sys/types.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/bus.h>
+#include <sys/module.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/condvar.h>
+#include <sys/sysctl.h>
+#include <sys/sx.h>
+#include <sys/unistd.h>
+#include <sys/callout.h>
+#include <sys/malloc.h>
+#include <sys/priv.h>
+#include <sys/rman.h>
+
+#include <dev/usb/usb.h>
+#include <dev/usb/usbdi.h>
+
+#include <dev/usb/usb_core.h>
+#include <dev/usb/usb_busdma.h>
+#include <dev/usb/usb_process.h>
+#include <dev/usb/usb_util.h>
+
+#include <dev/usb/usb_controller.h>
+#include <dev/usb/usb_bus.h>
+
+#include <dev/usb/controller/ehci.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#define EHCI_HC_DEVSTR	"MTK USB 2.0 Controller"
+
+static device_probe_t ehci_fdt_probe;
+static device_attach_t ehci_fdt_attach;
+static device_detach_t ehci_fdt_detach;
+
+static int
+ehci_fdt_probe(device_t self)
+{
+
+	if (!ofw_bus_status_okay(self))
+		return (ENXIO);
+
+	if (!ofw_bus_is_compatible(self, "ralink,rt3xxx-ehci"))
+		return (ENXIO);
+
+	device_set_desc(self, EHCI_HC_DEVSTR);
+
+	return (BUS_PROBE_DEFAULT);
+}
+
+static int
+ehci_fdt_attach(device_t self)
+{
+	ehci_softc_t *sc = device_get_softc(self);
+	int err;
+	int rid;
+
+	/* initialise some bus fields */
+	sc->sc_bus.parent = self;
+	sc->sc_bus.devices = sc->sc_devices;
+	sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
+	sc->sc_bus.dma_bits = 32;
+
+	/* get all DMA memory */
+	if (usb_bus_mem_alloc_all(&sc->sc_bus,
+	    USB_GET_DMA_TAG(self), &ehci_iterate_hw_softc)) {
+		printf("No mem\n");
+		return (ENOMEM);
+	}
+
+	rid = 0;
+	sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid,
+				RF_ACTIVE);
+	if (!sc->sc_io_res) {
+		device_printf(self, "Could not map memory\n");
+		goto error;
+	}
+	sc->sc_io_tag = rman_get_bustag(sc->sc_io_res);
+	sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
+	sc->sc_io_size = rman_get_size(sc->sc_io_res);
+
+	rid = 0;
+	sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
+		RF_SHAREABLE | RF_ACTIVE);
+	if (sc->sc_irq_res == NULL) {
+		device_printf(self, "Could not allocate irq\n");
+		goto error;
+	}
+
+	sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
+	if (!(sc->sc_bus.bdev)) {
+		device_printf(self, "Could not add USB device\n");
+		goto error;
+	}
+	device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
+	device_set_desc(sc->sc_bus.bdev, EHCI_HC_DEVSTR);
+
+	sprintf(sc->sc_vendor, "MediaTek");
+
+	err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
+		NULL, (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
+	if (err) {
+		device_printf(self, "Could not setup irq, %d\n", err);
+		sc->sc_intr_hdl = NULL;
+		goto error;
+	}
+
+	err = ehci_init(sc);
+	if (!err) {
+		err = device_probe_and_attach(sc->sc_bus.bdev);
+	}
+	if (err) {
+		device_printf(self, "USB init failed err=%d\n", err);
+		goto error;
+	}
+	return (0);
+
+error:
+	ehci_fdt_detach(self);
+	return (ENXIO);
+}
+
+static int
+ehci_fdt_detach(device_t self)
+{
+	ehci_softc_t *sc = device_get_softc(self);
+	device_t bdev;
+	int err;
+
+	if (sc->sc_bus.bdev) {
+		bdev = sc->sc_bus.bdev;
+		device_detach(bdev);
+		device_delete_child(self, bdev);
+	}
+	/* during module unload there are lots of children leftover */
+	device_delete_children(self);
+
+	if (sc->sc_irq_res && sc->sc_intr_hdl) {
+		/*
+		 * only call ehci_detach() after ehci_init()
+		 */
+		ehci_detach(sc);
+
+		err = bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
+		if (err)
+			device_printf(self, "Could not tear down irq, %d\n",
+				err);
+		sc->sc_intr_hdl = NULL;
+	}
+	if (sc->sc_irq_res) {
+		bus_release_resource(self, SYS_RES_IRQ, 0,
+		    sc->sc_irq_res);
+		sc->sc_irq_res = NULL;
+	}
+	if (sc->sc_io_res) {
+		bus_release_resource(self, SYS_RES_MEMORY, 0,
+		    sc->sc_io_res);
+		sc->sc_io_res = NULL;
+	}
+	usb_bus_mem_free_all(&sc->sc_bus, &ehci_iterate_hw_softc);
+
+	return (0);
+}
+
+static device_method_t ehci_fdt_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe, ehci_fdt_probe),
+	DEVMETHOD(device_attach, ehci_fdt_attach),
+	DEVMETHOD(device_detach, ehci_fdt_detach),
+	DEVMETHOD(device_suspend, bus_generic_suspend),
+	DEVMETHOD(device_resume, bus_generic_resume),
+	DEVMETHOD(device_shutdown, bus_generic_shutdown),
+
+	DEVMETHOD_END
+};
+
+static driver_t ehci_fdt_driver = {
+	.name = "ehci",
+	.methods = ehci_fdt_methods,
+	.size = sizeof(ehci_softc_t),
+};
+
+static devclass_t ehci_fdt_devclass;
+
+DRIVER_MODULE(ehci, simplebus, ehci_fdt_driver, ehci_fdt_devclass, 0, 0);
diff --git a/sys/mips/mediatek/mtk_ohci.c b/sys/mips/mediatek/mtk_ohci.c
new file mode 100644
index 0000000..91c98ce
--- /dev/null
+++ b/sys/mips/mediatek/mtk_ohci.c
@@ -0,0 +1,223 @@
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*-
+ * Copyright (c) 2015 Stanislav Galabov. All rights reserved.
+ * Copyright (c) 2010,2011 Aleksandr Rybalko. All rights reserved.
+ * Copyright (c) 2007-2008 Hans Petter Selasky. 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/stdint.h>
+#include <sys/stddef.h>
+#include <sys/param.h>
+#include <sys/queue.h>
+#include <sys/types.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/bus.h>
+#include <sys/module.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/condvar.h>
+#include <sys/sysctl.h>
+#include <sys/sx.h>
+#include <sys/unistd.h>
+#include <sys/callout.h>
+#include <sys/malloc.h>
+#include <sys/priv.h>
+#include <sys/rman.h>
+
+#include <dev/usb/usb.h>
+#include <dev/usb/usbdi.h>
+
+#include <dev/usb/usb_core.h>
+#include <dev/usb/usb_busdma.h>
+#include <dev/usb/usb_process.h>
+#include <dev/usb/usb_util.h>
+
+#include <dev/usb/usb_controller.h>
+#include <dev/usb/usb_bus.h>
+
+#include <dev/usb/controller/ohci.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#define OHCI_HC_DEVSTR	"MTK USB Controller"
+
+static device_probe_t ohci_fdt_probe;
+static device_attach_t ohci_fdt_attach;
+static device_detach_t ohci_fdt_detach;
+
+static int
+ohci_fdt_probe(device_t self)
+{
+
+	if (!ofw_bus_status_okay(self))
+		return (ENXIO);
+
+	if (!ofw_bus_is_compatible(self, "ralink,rt3xxx-ohci"))
+		return (ENXIO);
+
+	device_set_desc(self, OHCI_HC_DEVSTR);
+
+	return (BUS_PROBE_DEFAULT);
+}
+
+static int
+ohci_fdt_attach(device_t self)
+{
+	ohci_softc_t *sc = device_get_softc(self);
+	int err;
+	int rid;
+
+	/* initialise some bus fields */
+	sc->sc_bus.parent = self;
+	sc->sc_bus.devices = sc->sc_devices;
+	sc->sc_bus.devices_max = OHCI_MAX_DEVICES;
+	sc->sc_bus.dma_bits = 32;
+
+	/* get all DMA memory */
+	if (usb_bus_mem_alloc_all(&sc->sc_bus,
+	    USB_GET_DMA_TAG(self), &ohci_iterate_hw_softc)) {
+		printf("No mem\n");
+		return (ENOMEM);
+	}
+
+	rid = 0;
+	sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid,
+				RF_ACTIVE);
+	if (!sc->sc_io_res) {
+		device_printf(self, "Could not map memory\n");
+		goto error;
+	}
+	sc->sc_io_tag = rman_get_bustag(sc->sc_io_res);
+	sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
+	sc->sc_io_size = rman_get_size(sc->sc_io_res);
+
+	rid = 0;
+	sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
+		RF_SHAREABLE | RF_ACTIVE);
+	if (sc->sc_irq_res == NULL) {
+		device_printf(self, "Could not allocate irq\n");
+		goto error;
+	}
+
+	sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
+	if (!(sc->sc_bus.bdev)) {
+		device_printf(self, "Could not add USB device\n");
+		goto error;
+	}
+	device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
+	device_set_desc(sc->sc_bus.bdev, OHCI_HC_DEVSTR);
+
+	sprintf(sc->sc_vendor, "MediaTek");
+
+	err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
+		NULL, (driver_intr_t *)ohci_interrupt, sc, &sc->sc_intr_hdl);
+	if (err) {
+		device_printf(self, "Could not setup irq, %d\n", err);
+		sc->sc_intr_hdl = NULL;
+		goto error;
+	}
+
+	err = ohci_init(sc);
+	if (!err) {
+		err = device_probe_and_attach(sc->sc_bus.bdev);
+	}
+	if (err) {
+		device_printf(self, "USB init failed err=%d\n", err);
+		goto error;
+	}
+	return (0);
+
+error:
+	ohci_fdt_detach(self);
+	return (ENXIO);
+}
+
+static int
+ohci_fdt_detach(device_t self)
+{
+	ohci_softc_t *sc = device_get_softc(self);
+	device_t bdev;
+	int err;
+
+	if (sc->sc_bus.bdev) {
+		bdev = sc->sc_bus.bdev;
+		device_detach(bdev);
+		device_delete_child(self, bdev);
+	}
+	/* during module unload there are lots of children leftover */
+	device_delete_children(self);
+
+	if (sc->sc_irq_res && sc->sc_intr_hdl) {
+		/*
+		 * only call ohci_detach() after ohci_init()
+		 */
+		ohci_detach(sc);
+
+		err = bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
+		if (err)
+			device_printf(self, "Could not tear down irq, %d\n",
+				err);
+		sc->sc_intr_hdl = NULL;
+	}
+	if (sc->sc_irq_res) {
+		bus_release_resource(self, SYS_RES_IRQ, 0,
+		    sc->sc_irq_res);
+		sc->sc_irq_res = NULL;
+	}
+	if (sc->sc_io_res) {
+		bus_release_resource(self, SYS_RES_MEMORY, 0,
+		    sc->sc_io_res);
+		sc->sc_io_res = NULL;
+	}
+	usb_bus_mem_free_all(&sc->sc_bus, &ohci_iterate_hw_softc);
+
+	return (0);
+}
+
+static device_method_t ohci_fdt_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe, ohci_fdt_probe),
+	DEVMETHOD(device_attach, ohci_fdt_attach),
+	DEVMETHOD(device_detach, ohci_fdt_detach),
+	DEVMETHOD(device_suspend, bus_generic_suspend),
+	DEVMETHOD(device_resume, bus_generic_resume),
+	DEVMETHOD(device_shutdown, bus_generic_shutdown),
+
+	DEVMETHOD_END
+};
+
+static driver_t ohci_fdt_driver = {
+	.name = "ohci",
+	.methods = ohci_fdt_methods,
+	.size = sizeof(ohci_softc_t),
+};
+
+static devclass_t ohci_fdt_devclass;
+
+DRIVER_MODULE(ohci, simplebus, ohci_fdt_driver, ohci_fdt_devclass, 0, 0);
diff --git a/sys/mips/mediatek/mtk_usb_phy.c b/sys/mips/mediatek/mtk_usb_phy.c
new file mode 100644
index 0000000..da2acf0
--- /dev/null
+++ b/sys/mips/mediatek/mtk_usb_phy.c
@@ -0,0 +1,314 @@
+/*-
+ * Copyright (c) 2016 Stanislav Galabov.
+ * 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/stddef.h>
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/kernel.h>
+#include <sys/bus.h>
+#include <sys/module.h>
+
+#include <machine/bus.h>
+
+#include <dev/fdt/fdt_common.h>
+#include <dev/fdt/fdt_clock.h>
+#include <mips/mediatek/fdt_reset.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <mips/mediatek/mtk_sysctl.h>
+#include <mips/mediatek/mtk_soc.h>
+#include <mips/mediatek/mtk_usb_phy.h>
+
+#define RESET_ASSERT_DELAY	1000
+#define RESET_DEASSERT_DELAY	10000
+
+struct mtk_usb_phy_softc {
+	device_t		dev;
+	struct resource *	res;
+	uint32_t		fm_base;
+	uint32_t		u2_base;
+	uint32_t		sr_coef;
+	uint32_t		socid;
+};
+
+#define USB_PHY_READ(_sc, _off)		bus_read_4((_sc)->res, (_off))
+#define USB_PHY_WRITE(_sc, _off, _val)	bus_write_4((_sc)->res, (_off), (_val))
+#define USB_PHY_CLR_SET(_sc, _off, _clr, _set)	\
+	USB_PHY_WRITE(_sc, _off, ((USB_PHY_READ(_sc, _off) & ~(_clr)) | (_set)))
+
+#define USB_PHY_READ_U2(_sc, _off)			\
+	USB_PHY_READ((_sc), ((_sc)->u2_base + (_off)))
+#define USB_PHY_WRITE_U2(_sc, _off, _val)		\
+	USB_PHY_WRITE((_sc), ((_sc)->u2_base + (_off)), (_val))
+#define USB_PHY_CLR_SET_U2(_sc, _off, _clr, _set)	\
+	USB_PHY_WRITE_U2((_sc), (_off), ((USB_PHY_READ_U2((_sc), (_off)) & \
+	    ~(_clr)) | (_set)))
+#define USB_PHY_BARRIER(_sc)	bus_barrier((_sc)->res, 0, 0, \
+			BUS_SPACE_BARRIER_WRITE | BUS_SPACE_BARRIER_READ)
+
+#define USB_PHY_READ_FM(_sc, _off)			\
+	USB_PHY_READ((_sc), ((_sc)->fm_base + (_off)))
+#define USB_PHY_WRITE_FM(_sc, _off)			\
+	USB_PHY_WRITE((_sc), ((_sc)->fm_base + (_off)), (_val))
+#define USB_PHY_CLR_SET_FM(_sc, _off, _clr, _set)	\
+	USB_PHY_WRITE_U2((_sc), (_off), ((USB_PHY_READ_U2((_sc), (_off)) & \
+	    ~(_clr)) | (_set)))
+
+static void mtk_usb_phy_mt7621_init(device_t);
+static void mtk_usb_phy_mt7628_init(device_t);
+
+static struct ofw_compat_data compat_data[] = {
+	{ "ralink,mt7620a-usbphy",	MTK_SOC_MT7620A },
+	{ "ralink,mt7628an-usbphy",	MTK_SOC_MT7628 },
+	{ "ralink,rt3xxx-usbphy",	MTK_SOC_RT3352 },
+	{ NULL,				MTK_SOC_UNKNOWN }
+};
+
+static int
+mtk_usb_phy_probe(device_t dev)
+{
+	struct mtk_usb_phy_softc *sc = device_get_softc(dev);
+
+	if (!ofw_bus_status_okay(dev))
+		return (ENXIO);
+	if ((sc->socid =
+	    ofw_bus_search_compatible(dev, compat_data)->ocd_data) ==
+	    MTK_SOC_UNKNOWN)
+		return (ENXIO);
+
+	device_set_desc(dev, "MTK USB PHY");
+
+	return (0);
+}
+
+static int
+mtk_usb_phy_attach(device_t dev)
+{
+	struct mtk_usb_phy_softc * sc = device_get_softc(dev);
+	phandle_t node;
+	uint32_t val;
+	int rid;
+
+	sc->dev = dev;
+
+	/* Get our FDT node and SoC id */
+	node = ofw_bus_get_node(dev);
+
+	/* Now let's see about setting USB to host or device mode */
+	/* XXX: is it the same for all SoCs? */
+	val = mtk_sysctl_get(SYSCTL_SYSCFG1);
+	if (OF_hasprop(node, "mtk,usb-device"))
+		val &= ~SYSCFG1_USB_HOST_MODE;
+	else
+		val |= SYSCFG1_USB_HOST_MODE;
+	mtk_sysctl_set(SYSCTL_SYSCFG1, val);
+
+	/* If we have clocks defined - enable them */
+	if (OF_hasprop(node, "clocks"))
+		fdt_clock_enable_all(dev);
+
+	/* If we have resets defined - perform a reset sequence */
+	if (OF_hasprop(node, "resets")) {
+		fdt_reset_assert_all(dev);
+		DELAY(RESET_ASSERT_DELAY);
+		fdt_reset_deassert_all(dev);
+		DELAY(RESET_DEASSERT_DELAY);
+	}
+
+	/* Careful, some devices actually require resources */
+	if (OF_hasprop(node, "reg")) {
+		rid = 0;
+		sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
+		    RF_ACTIVE);
+		if (sc->res == NULL) {
+			device_printf(dev, "could not map memory\n");
+			return (ENXIO);
+		}
+	} else {
+		sc->res = NULL;
+	}
+
+	/* Some SoCs require specific USB PHY init... handle these */
+	switch (sc->socid) {
+	case MTK_SOC_MT7628: /* Fallthrough */
+	case MTK_SOC_MT7688:
+		if (sc->res == NULL)
+			return (ENXIO);
+		sc->fm_base = MT7628_FM_FEG_BASE;
+		sc->u2_base = MT7628_U2_BASE;
+		sc->sr_coef = MT7628_SR_COEF;
+		mtk_usb_phy_mt7628_init(dev);
+		break;
+	case MTK_SOC_MT7621:
+		if (sc->res == NULL)
+			return (ENXIO);
+		sc->fm_base = MT7621_FM_FEG_BASE;
+		sc->u2_base = MT7621_U2_BASE;
+		sc->sr_coef = MT7621_SR_COEF;
+		mtk_usb_phy_mt7621_init(dev);
+		break;
+	}
+
+	/* We no longer need the resources, release them */
+	if (sc->res != NULL)
+		bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->res);
+
+	return (0);
+}
+
+static int
+mtk_usb_phy_detach(device_t dev)
+{
+	struct mtk_usb_phy_softc *sc = device_get_softc(dev);
+	phandle_t node;
+
+	/* Get our FDT node */
+	node = ofw_bus_get_node(dev);
+
+	/* If we have resets defined - assert them */
+	if (OF_hasprop(node, "resets"))
+		fdt_reset_assert_all(dev);
+
+	/* If we have clocks defined - disable them */
+	if (OF_hasprop(node, "clocks"))
+		fdt_clock_disable_all(dev);
+
+	/* Finally, release resources, if any were allocated */
+	if (sc->res != NULL)
+		bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->res);
+
+	return (0);
+}
+
+static void
+mtk_usb_phy_slew_rate_calibration(struct mtk_usb_phy_softc *sc)
+{
+	uint32_t val;
+	int i;
+
+	USB_PHY_CLR_SET_U2(sc, U2_PHY_ACR0, 0, SRCAL_EN);
+	USB_PHY_BARRIER(sc);
+	DELAY(1000);
+
+	USB_PHY_CLR_SET_FM(sc, U2_PHY_FMMONR1, 0, FRCK_EN);
+	USB_PHY_BARRIER(sc);
+	USB_PHY_CLR_SET_FM(sc, U2_PHY_FMCR0, CYCLECNT, 0x400);
+	USB_PHY_BARRIER(sc);
+	USB_PHY_CLR_SET_FM(sc, U2_PHY_FMCR0, 0, FDET_EN);
+	USB_PHY_BARRIER(sc);
+
+	for (i = 0; i < 1000; i++) {
+		if ((val = USB_PHY_READ_FM(sc, U2_PHY_FMMONR0)) != 0) {
+			device_printf(sc->dev, "DONE with FDET\n");
+			break;
+		}
+		DELAY(10000);
+	}
+	device_printf(sc->dev, "After FDET\n");
+
+	USB_PHY_CLR_SET_FM(sc, U2_PHY_FMCR0, FDET_EN, 0);
+	USB_PHY_BARRIER(sc);
+	USB_PHY_CLR_SET_FM(sc, U2_PHY_FMMONR1, FRCK_EN, 0);
+	USB_PHY_BARRIER(sc);
+	USB_PHY_CLR_SET_U2(sc, U2_PHY_ACR0, SRCAL_EN, 0);
+	USB_PHY_BARRIER(sc);
+	DELAY(1000);
+
+	if (val == 0) {
+		USB_PHY_CLR_SET_U2(sc, U2_PHY_ACR0, SRCTRL, 0x4 << SRCTRL_OFF);
+		USB_PHY_BARRIER(sc);
+	} else {
+		val = ((((1024 * 25 * sc->sr_coef) / val) + 500) / 1000) &
+		    SRCTRL_MSK;
+		USB_PHY_CLR_SET_U2(sc, U2_PHY_ACR0, SRCTRL, val << SRCTRL_OFF);
+		USB_PHY_BARRIER(sc);
+	}
+}
+
+static void
+mtk_usb_phy_mt7621_init(device_t dev)
+{
+	struct mtk_usb_phy_softc *sc = device_get_softc(dev);
+
+	/* Slew rate calibration only, but for 2 ports */
+	mtk_usb_phy_slew_rate_calibration(sc);
+
+	sc->u2_base = MT7621_U2_BASE_P1;
+	mtk_usb_phy_slew_rate_calibration(sc);
+}
+
+static void
+mtk_usb_phy_mt7628_init(device_t dev)
+{
+	struct mtk_usb_phy_softc *sc = device_get_softc(dev);
+
+	/* XXX: possibly add barriers between the next writes? */
+	USB_PHY_WRITE_U2(sc, U2_PHY_DCR0, 0x00ffff02);
+	USB_PHY_BARRIER(sc);
+	USB_PHY_WRITE_U2(sc, U2_PHY_DCR0, 0x00555502);
+	USB_PHY_BARRIER(sc);
+	USB_PHY_WRITE_U2(sc, U2_PHY_DCR0, 0x00aaaa02);
+	USB_PHY_BARRIER(sc);
+	USB_PHY_WRITE_U2(sc, U2_PHY_DCR0, 0x00000402);
+	USB_PHY_BARRIER(sc);
+	USB_PHY_WRITE_U2(sc,  U2_PHY_AC0, 0x0048086a);
+	USB_PHY_BARRIER(sc);
+	USB_PHY_WRITE_U2(sc,  U2_PHY_AC1, 0x4400001c);
+	USB_PHY_BARRIER(sc);
+	USB_PHY_WRITE_U2(sc, U2_PHY_ACR3, 0xc0200000);
+	USB_PHY_BARRIER(sc);
+	USB_PHY_WRITE_U2(sc, U2_PHY_DTM0, 0x02000000);
+	USB_PHY_BARRIER(sc);
+
+	/* Slew rate calibration */
+	//mtk_usb_phy_slew_rate_calibration(sc);
+}
+
+static device_method_t mtk_usb_phy_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		mtk_usb_phy_probe),
+	DEVMETHOD(device_attach,	mtk_usb_phy_attach),
+	DEVMETHOD(device_detach,	mtk_usb_phy_detach),
+	DEVMETHOD(device_suspend,	bus_generic_suspend),
+	DEVMETHOD(device_resume,	bus_generic_resume),
+	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
+
+	DEVMETHOD_END
+};
+
+static driver_t mtk_usb_phy_driver = {
+	.name = "usbphy",
+	.methods = mtk_usb_phy_methods,
+	.size = sizeof(struct mtk_usb_phy_softc),
+};
+
+static devclass_t mtk_usb_phy_devclass;
+
+DRIVER_MODULE(usbphy, simplebus, mtk_usb_phy_driver, mtk_usb_phy_devclass, 0,
+    0);
diff --git a/sys/mips/mediatek/mtk_usb_phy.h b/sys/mips/mediatek/mtk_usb_phy.h
new file mode 100644
index 0000000..24fb661
--- /dev/null
+++ b/sys/mips/mediatek/mtk_usb_phy.h
@@ -0,0 +1,66 @@
+/*-
+ * Copyright (c) 2016 Stanislav Galabov.
+ * 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.
+ *
+ * $FreeBSD$
+ */
+#ifndef _MTK_USB_PHY_H_
+#define _MTK_USB_PHY_H_
+
+#define MT7621_FM_FEG_BASE	0x0100
+#define MT7621_U2_BASE		0x0800
+#define MT7621_U2_BASE_P1	0x1000
+#define MT7621_SR_COEF		28
+
+#define MT7628_FM_FEG_BASE	0x0f00
+#define MT7628_U2_BASE		0x0800
+#define MT7628_SR_COEF		32
+
+#define U2_PHY_AC0		0x00
+#define U2_PHY_AC1		0x04
+#define U2_PHY_AC2		0x08
+#define U2_PHY_ACR0		0x10
+#define   SRCAL_EN			(1<<23)
+#define   SRCTRL_MSK			0x7
+#define   SRCTRL_OFF			16
+#define   SRCTRL			(SRCTRL_MSK<<SRCTRL_OFF)
+#define U2_PHY_ACR1		0x14
+#define U2_PHY_ACR2		0x18
+#define U2_PHY_ACR3		0x1C
+
+#define U2_PHY_DCR0		0x60
+#define U2_PHY_DCR1		0x64
+#define U2_PHY_DTM0		0x68
+#define U2_PHY_DTM1		0x6C
+
+#define U2_PHY_FMCR0		0x00
+#define   CYCLECNT			(0xffffff)
+#define   FDET_EN			(1<<24)
+#define U2_PHY_FMCR1		0x04
+#define   FRCK_EN			(1<<8)
+#define U2_PHY_FMCR2		0x08
+#define U2_PHY_FMMONR0		0x0C
+#define U2_PHY_FMMONR1		0x10
+
+#endif /* _MTK_USB_PHY_H_ */