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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2018 Ruslan Bukin <br@bsdpad.com>
* All rights reserved.
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
* ("CTSRD"), as part of the DARPA CRASH research programme.
*
* 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/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <dev/fdt/simplebus.h>
#include <dev/ofw/ofw_bus_subr.h>
struct soc_softc {
struct simplebus_softc simplebus_sc;
device_t dev;
};
static int
soc_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_is_compatible(dev, "riscv-virtio-soc"))
return (ENXIO);
device_set_desc(dev, "RISC-V SoC");
return (BUS_PROBE_DEFAULT);
}
static int
soc_attach(device_t dev)
{
struct soc_softc *sc;
phandle_t node;
sc = device_get_softc(dev);
sc->dev = dev;
node = ofw_bus_get_node(dev);
if (node == -1)
return (ENXIO);
simplebus_init(dev, node);
/*
* Allow devices to identify.
*/
bus_generic_probe(dev);
/*
* Now walk the OFW tree and attach top-level devices.
*/
for (node = OF_child(node); node > 0; node = OF_peer(node))
simplebus_add_device(dev, node, 0, NULL, -1, NULL);
return (bus_generic_attach(dev));
}
static int
soc_detach(device_t dev)
{
return (0);
}
static device_method_t soc_methods[] = {
DEVMETHOD(device_probe, soc_probe),
DEVMETHOD(device_attach, soc_attach),
DEVMETHOD(device_detach, soc_detach),
DEVMETHOD_END
};
DEFINE_CLASS_1(soc, soc_driver, soc_methods, sizeof(struct soc_softc),
simplebus_driver);
static devclass_t soc_devclass;
EARLY_DRIVER_MODULE(soc, simplebus, soc_driver, soc_devclass, 0, 0,
BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
MODULE_VERSION(soc, 1);
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