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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2022 Beckhoff Automation GmbH & Co. KG
*
* 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>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/bus.h>
#include <sys/cpu.h>
#include <machine/bus.h>
#include <dev/fdt/simplebus.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
struct ofw_firmware_softc {
struct simplebus_softc sc;
device_t dev;
};
static struct simplebus_devinfo *
ofw_firmware_setup_dinfo(device_t dev, phandle_t node,
struct simplebus_devinfo *di)
{
struct simplebus_softc *sc;
struct simplebus_devinfo *ndi;
sc = device_get_softc(dev);
if (di == NULL)
ndi = malloc(sizeof(*ndi), M_DEVBUF, M_WAITOK | M_ZERO);
else
ndi = di;
if (ofw_bus_gen_setup_devinfo(&ndi->obdinfo, node) != 0) {
if (di == NULL)
free(ndi, M_DEVBUF);
return (NULL);
}
/* reg resources is from the parent but interrupts is on the node itself */
resource_list_init(&ndi->rl);
ofw_bus_reg_to_rl(dev, OF_parent(node), sc->acells, sc->scells, &ndi->rl);
ofw_bus_intr_to_rl(dev, node, &ndi->rl, NULL);
return (ndi);
}
static device_t
ofw_firmware_add_device(device_t dev, phandle_t node, u_int order,
const char *name, int unit, struct simplebus_devinfo *di)
{
struct simplebus_devinfo *ndi;
device_t cdev;
if ((ndi = ofw_firmware_setup_dinfo(dev, node, di)) == NULL)
return (NULL);
cdev = device_add_child_ordered(dev, order, name, unit);
if (cdev == NULL) {
device_printf(dev, "<%s>: device_add_child failed\n",
ndi->obdinfo.obd_name);
resource_list_free(&ndi->rl);
ofw_bus_gen_destroy_devinfo(&ndi->obdinfo);
if (di == NULL)
free(ndi, M_DEVBUF);
return (NULL);
}
device_set_ivars(cdev, ndi);
return(cdev);
}
static int
ofw_firmware_probe(device_t dev)
{
const char *name, *compat;
phandle_t root, parent;
name = ofw_bus_get_name(dev);
if (name == NULL || strcmp(name, "firmware") != 0)
return (ENXIO);
parent = OF_parent(ofw_bus_get_node(dev));
root = OF_finddevice("/");
if (parent != root)
return (ENXIO);
compat = ofw_bus_get_compat(dev);
if (compat != NULL)
return (ENXIO);
device_set_desc(dev, "OFW Firmware Group");
return (BUS_PROBE_GENERIC);
}
static int
ofw_firmware_attach(device_t dev)
{
struct ofw_firmware_softc *sc;
phandle_t node, child;
device_t cdev;
sc = device_get_softc(dev);
sc->dev = dev;
node = ofw_bus_get_node(dev);
if (OF_getencprop(node, "#address-cells", &sc->sc.acells,
sizeof(sc->sc.acells)) == -1) {
if (OF_getencprop(OF_parent(node), "#address-cells", &sc->sc.acells,
sizeof(sc->sc.acells)) == -1) {
sc->sc.acells = 2;
}
}
if (OF_getencprop(node, "#size-cells", &sc->sc.scells,
sizeof(sc->sc.scells)) == -1) {
if (OF_getencprop(OF_parent(node), "#size-cells", &sc->sc.scells,
sizeof(sc->sc.scells)) == -1) {
sc->sc.scells = 1;
}
}
for (child = OF_child(node); child != 0; child = OF_peer(child)) {
cdev = ofw_firmware_add_device(dev, child, 0, NULL, -1, NULL);
if (cdev != NULL)
device_probe_and_attach(cdev);
}
bus_attach_children(dev);
return (0);
}
static device_method_t ofw_firmware_methods[] = {
/* device_if */
DEVMETHOD(device_probe, ofw_firmware_probe),
DEVMETHOD(device_attach, ofw_firmware_attach),
DEVMETHOD_END
};
DEFINE_CLASS_1(ofw_firmware, ofw_firmware_driver, ofw_firmware_methods,
sizeof(struct ofw_firmware_softc), simplebus_driver);
EARLY_DRIVER_MODULE(ofw_firmware, simplebus, ofw_firmware_driver, 0, 0,
BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
MODULE_VERSION(ofw_firmware, 1);
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