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5fb94d0e16
Use the correct resets and not the same one three times in a row. Reported by: rpokala Sponsored by: Beckhoff Automation GmbH & Co. KG
149 lines
4.2 KiB
C
149 lines
4.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2022 Beckhoff Automation GmbH & Co. KG
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Xilinx DWC3 glue
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*/
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/rman.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/gpio.h>
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#include <machine/bus.h>
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#include <dev/fdt/simplebus.h>
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#include <dev/fdt/fdt_common.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/ofw/ofw_subr.h>
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#include <dev/extres/clk/clk.h>
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#include <dev/extres/hwreset/hwreset.h>
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#include <dev/extres/phy/phy_usb.h>
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#include <dev/extres/syscon/syscon.h>
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static struct ofw_compat_data compat_data[] = {
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{ "xlnx,zynqmp-dwc3", 1 },
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{ NULL, 0 }
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};
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struct xlnx_dwc3_softc {
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struct simplebus_softc sc;
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device_t dev;
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hwreset_t rst_crst;
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hwreset_t rst_hibrst;
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hwreset_t rst_apbrst;
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};
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static int
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xlnx_dwc3_probe(device_t dev)
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{
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phandle_t node;
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
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return (ENXIO);
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/* Binding says that we need a child node for the actual dwc3 controller */
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node = ofw_bus_get_node(dev);
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if (OF_child(node) <= 0)
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return (ENXIO);
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device_set_desc(dev, "Xilinx ZYNQMP DWC3");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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xlnx_dwc3_attach(device_t dev)
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{
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struct xlnx_dwc3_softc *sc;
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device_t cdev;
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phandle_t node, child;
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sc = device_get_softc(dev);
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sc->dev = dev;
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node = ofw_bus_get_node(dev);
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/*
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* Put module out of reset
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* Based on the bindings this should be mandatory to have
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* but reality shows that they aren't always there.
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* This is the case on the DTB in the AVnet Ultra96
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*/
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if (hwreset_get_by_ofw_name(dev, node, "usb_crst", &sc->rst_crst) == 0) {
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if (hwreset_deassert(sc->rst_crst) != 0) {
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device_printf(dev, "Cannot deassert reset\n");
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return (ENXIO);
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}
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}
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if (hwreset_get_by_ofw_name(dev, node, "usb_hibrst", &sc->rst_hibrst) == 0) {
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if (hwreset_deassert(sc->rst_hibrst) != 0) {
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device_printf(dev, "Cannot deassert reset\n");
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return (ENXIO);
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}
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}
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if (hwreset_get_by_ofw_name(dev, node, "usb_apbrst", &sc->rst_apbrst) == 0) {
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if (hwreset_deassert(sc->rst_apbrst) != 0) {
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device_printf(dev, "Cannot deassert reset\n");
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return (ENXIO);
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}
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}
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simplebus_init(dev, node);
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if (simplebus_fill_ranges(node, &sc->sc) < 0) {
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device_printf(dev, "could not get ranges\n");
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return (ENXIO);
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}
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for (child = OF_child(node); child > 0; child = OF_peer(child)) {
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cdev = simplebus_add_device(dev, child, 0, NULL, -1, NULL);
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if (cdev != NULL)
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device_probe_and_attach(cdev);
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}
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return (bus_generic_attach(dev));
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}
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static device_method_t xlnx_dwc3_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, xlnx_dwc3_probe),
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DEVMETHOD(device_attach, xlnx_dwc3_attach),
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DEVMETHOD_END
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};
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DEFINE_CLASS_1(xlnx_dwc3, xlnx_dwc3_driver, xlnx_dwc3_methods,
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sizeof(struct xlnx_dwc3_softc), simplebus_driver);
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DRIVER_MODULE(xlnx_dwc3, simplebus, xlnx_dwc3_driver, 0, 0);
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