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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2019 Emmanuel Vadot <manu@FreeBSD.Org>
*
* 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.
*/
/*
* Rockchip DWC3 glue
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/gpio.h>
#include <machine/bus.h>
#include <dev/fdt/simplebus.h>
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/ofw/ofw_subr.h>
#include <dev/extres/clk/clk.h>
#include <dev/extres/hwreset/hwreset.h>
#include <dev/extres/phy/phy_usb.h>
#include <dev/extres/syscon/syscon.h>
enum rk_dwc3_type {
RK3328 = 1,
RK3399,
};
static struct ofw_compat_data compat_data[] = {
{ "rockchip,rk3328-dwc3", RK3328 },
{ "rockchip,rk3399-dwc3", RK3399 },
{ NULL, 0 }
};
struct rk_dwc3_softc {
struct simplebus_softc sc;
device_t dev;
clk_t clk_ref;
clk_t clk_suspend;
clk_t clk_bus;
clk_t clk_axi_perf;
clk_t clk_usb3;
clk_t clk_grf;
hwreset_t rst_usb3;
enum rk_dwc3_type type;
};
static int
rk_dwc3_probe(device_t dev)
{
phandle_t node;
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
return (ENXIO);
/* Binding says that we need a child node for the actual dwc3 controller */
node = ofw_bus_get_node(dev);
if (OF_child(node) <= 0)
return (ENXIO);
device_set_desc(dev, "Rockchip RK3399 DWC3");
return (BUS_PROBE_DEFAULT);
}
static int
rk_dwc3_attach(device_t dev)
{
struct rk_dwc3_softc *sc;
device_t cdev;
phandle_t node, child;
int err;
sc = device_get_softc(dev);
sc->dev = dev;
node = ofw_bus_get_node(dev);
sc->type = ofw_bus_search_compatible(dev, compat_data)->ocd_data;
/* Mandatory clocks */
if (clk_get_by_ofw_name(dev, 0, "ref_clk", &sc->clk_ref) != 0) {
device_printf(dev, "Cannot get ref_clk clock\n");
return (ENXIO);
}
err = clk_enable(sc->clk_ref);
if (err != 0) {
device_printf(dev, "Could not enable clock %s\n",
clk_get_name(sc->clk_ref));
return (ENXIO);
}
if (clk_get_by_ofw_name(dev, 0, "suspend_clk", &sc->clk_suspend) != 0) {
device_printf(dev, "Cannot get suspend_clk clock\n");
return (ENXIO);
}
err = clk_enable(sc->clk_suspend);
if (err != 0) {
device_printf(dev, "Could not enable clock %s\n",
clk_get_name(sc->clk_suspend));
return (ENXIO);
}
if (clk_get_by_ofw_name(dev, 0, "bus_clk", &sc->clk_bus) != 0) {
device_printf(dev, "Cannot get bus_clk clock\n");
return (ENXIO);
}
err = clk_enable(sc->clk_bus);
if (err != 0) {
device_printf(dev, "Could not enable clock %s\n",
clk_get_name(sc->clk_bus));
return (ENXIO);
}
if (sc->type == RK3399) {
if (clk_get_by_ofw_name(dev, 0, "grf_clk", &sc->clk_grf) != 0) {
device_printf(dev, "Cannot get grf_clk clock\n");
return (ENXIO);
}
err = clk_enable(sc->clk_grf);
if (err != 0) {
device_printf(dev, "Could not enable clock %s\n",
clk_get_name(sc->clk_grf));
return (ENXIO);
}
}
/* Optional clocks */
if (clk_get_by_ofw_name(dev, 0, "aclk_usb3_rksoc_axi_perf", &sc->clk_axi_perf) == 0) {
err = clk_enable(sc->clk_axi_perf);
if (err != 0) {
device_printf(dev, "Could not enable clock %s\n",
clk_get_name(sc->clk_axi_perf));
return (ENXIO);
}
}
if (clk_get_by_ofw_name(dev, 0, "aclk_usb3", &sc->clk_usb3) == 0) {
err = clk_enable(sc->clk_usb3);
if (err != 0) {
device_printf(dev, "Could not enable clock %s\n",
clk_get_name(sc->clk_usb3));
return (ENXIO);
}
}
/* Put module out of reset */
if (hwreset_get_by_ofw_name(dev, node, "usb3-otg", &sc->rst_usb3) == 0) {
if (hwreset_deassert(sc->rst_usb3) != 0) {
device_printf(dev, "Cannot deassert reset\n");
return (ENXIO);
}
}
simplebus_init(dev, node);
if (simplebus_fill_ranges(node, &sc->sc) < 0) {
device_printf(dev, "could not get ranges\n");
return (ENXIO);
}
for (child = OF_child(node); child > 0; child = OF_peer(child)) {
cdev = simplebus_add_device(dev, child, 0, NULL, -1, NULL);
if (cdev != NULL)
device_probe_and_attach(cdev);
}
return (bus_generic_attach(dev));
}
static device_method_t rk_dwc3_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, rk_dwc3_probe),
DEVMETHOD(device_attach, rk_dwc3_attach),
DEVMETHOD_END
};
static devclass_t rk_dwc3_devclass;
DEFINE_CLASS_1(rk_dwc3, rk_dwc3_driver, rk_dwc3_methods,
sizeof(struct rk_dwc3_softc), simplebus_driver);
DRIVER_MODULE(rk_dwc3, simplebus, rk_dwc3_driver, rk_dwc3_devclass, 0, 0);
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