Differential D25118 Diff 75165 head/sys/arm/ti/ti_omap4_cm.c

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head/sys/arm/ti/ti_omap4_cm.c

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				/*-
				* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
				*
				* Copyright (c) 2019 Emmanuel Vadot <manu@FreeBSD.org>
				* Copyright (c) 2020 Oskar Holmlund <oskar.holmlund@ohdata.se>
				*
				* 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.
				*
				* Based on sys/arm/ti/ti_sysc.c
				*
				* $FreeBSD$
				*/

				#include <sys/cdefs.h>
				__FBSDID("$FreeBSD$");

				#include <sys/param.h>
				#include <sys/systm.h>
				#include <sys/bus.h>
				#include <sys/fbio.h>
				#include <sys/kernel.h>
				#include <sys/module.h>
				#include <sys/rman.h>
				#include <sys/resource.h>
				#include <machine/bus.h>
				#include <vm/vm.h>
				#include <vm/vm_extern.h>
				#include <vm/vm_kern.h>
				#include <vm/pmap.h>

				#include <dev/fdt/simplebus.h>

				#include <dev/ofw/ofw_bus.h>
				#include <dev/ofw/ofw_bus_subr.h>

				#include <arm/ti/ti_omap4_cm.h>

				static struct ofw_compat_data compat_data[] = {
				{ "ti,omap4-cm", 1 },
				{ NULL, 0 }
				};

				struct ti_omap4_cm_softc {
				struct simplebus_softc sc;
				device_t dev;
				};

				uint64_t
				ti_omap4_cm_get_simplebus_base_host(device_t dev) {
				struct ti_omap4_cm_softc *sc;

				sc = device_get_softc(dev);
				if (sc->sc.nranges == 0)
				return (0);

				return (sc->sc.ranges[0].host);
				}

				static int ti_omap4_cm_probe(device_t dev);
				static int ti_omap4_cm_attach(device_t dev);
				static int ti_omap4_cm_detach(device_t dev);

				static int
				ti_omap4_cm_probe(device_t dev)
				{
				if (!ofw_bus_status_okay(dev))
				return (ENXIO);

				if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
				return (ENXIO);

				device_set_desc(dev, "TI OMAP4-CM");
				if (!bootverbose)
				device_quiet(dev);

				return (BUS_PROBE_DEFAULT);
				}

				static int
				ti_omap4_cm_attach(device_t dev)
				{
				struct ti_omap4_cm_softc *sc;
				device_t cdev;
				phandle_t node, child;

				sc = device_get_softc(dev);
				sc->dev = dev;
				node = ofw_bus_get_node(dev);

				simplebus_init(dev, node);
				if (simplebus_fill_ranges(node, &sc->sc) < 0) {
				device_printf(dev, "could not get ranges\n");
				return (ENXIO);
				}

				bus_generic_probe(sc->dev);

				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 int
				ti_omap4_cm_detach(device_t dev)
				{
				return (EBUSY);
				}

				static device_method_t ti_omap4_cm_methods[] = {
				/* Device interface */
				DEVMETHOD(device_probe, ti_omap4_cm_probe),
				DEVMETHOD(device_attach, ti_omap4_cm_attach),
				DEVMETHOD(device_detach, ti_omap4_cm_detach),

				DEVMETHOD_END
				};

				DEFINE_CLASS_1(ti_omap4_cm, ti_omap4_cm_driver, ti_omap4_cm_methods,
				sizeof(struct ti_omap4_cm_softc), simplebus_driver);

				static devclass_t ti_omap4_cm_devclass;

				EARLY_DRIVER_MODULE(ti_omap4_cm, simplebus, ti_omap4_cm_driver,
				ti_omap4_cm_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_FIRST);

				EARLY_DRIVER_MODULE(ti_omap4_cm, ofwbus, ti_omap4_cm_driver,
				ti_omap4_cm_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_FIRST);