While here make it only probe if the node is directly under the root one. If it's not it's likely a device node named 'firmware' and not the firmware group we're interested in. Suggested by: jhb Sponsored by: Beckhoff Automation GmbH & Co. KG
170 lines
4.8 KiB
C
170 lines
4.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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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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#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/kernel.h>
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#include <sys/module.h>
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#include <sys/malloc.h>
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#include <sys/bus.h>
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#include <sys/cpu.h>
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#include <machine/bus.h>
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#include <dev/fdt/simplebus.h>
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#include <dev/ofw/openfirm.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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struct ofw_firmware_softc {
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struct simplebus_softc sc;
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device_t dev;
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};
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static struct simplebus_devinfo *
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ofw_firmware_setup_dinfo(device_t dev, phandle_t node,
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struct simplebus_devinfo *di)
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{
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struct simplebus_softc *sc;
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struct simplebus_devinfo *ndi;
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sc = device_get_softc(dev);
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if (di == NULL)
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ndi = malloc(sizeof(*ndi), M_DEVBUF, M_WAITOK | M_ZERO);
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else
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ndi = di;
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if (ofw_bus_gen_setup_devinfo(&ndi->obdinfo, node) != 0) {
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if (di == NULL)
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free(ndi, M_DEVBUF);
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return (NULL);
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}
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/* reg resources is from the parent but interrupts is on the node itself */
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resource_list_init(&ndi->rl);
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ofw_bus_reg_to_rl(dev, OF_parent(node), sc->acells, sc->scells, &ndi->rl);
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ofw_bus_intr_to_rl(dev, node, &ndi->rl, NULL);
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return (ndi);
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}
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static device_t
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ofw_firmware_add_device(device_t dev, phandle_t node, u_int order,
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const char *name, int unit, struct simplebus_devinfo *di)
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{
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struct simplebus_devinfo *ndi;
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device_t cdev;
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if ((ndi = ofw_firmware_setup_dinfo(dev, node, di)) == NULL)
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return (NULL);
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cdev = device_add_child_ordered(dev, order, name, unit);
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if (cdev == NULL) {
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device_printf(dev, "<%s>: device_add_child failed\n",
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ndi->obdinfo.obd_name);
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resource_list_free(&ndi->rl);
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ofw_bus_gen_destroy_devinfo(&ndi->obdinfo);
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if (di == NULL)
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free(ndi, M_DEVBUF);
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return (NULL);
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}
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device_set_ivars(cdev, ndi);
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return(cdev);
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}
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static int
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ofw_firmware_probe(device_t dev)
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{
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const char *name, *compat;
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phandle_t root, parent;
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name = ofw_bus_get_name(dev);
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if (name == NULL || strcmp(name, "firmware") != 0)
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return (ENXIO);
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parent = OF_parent(ofw_bus_get_node(dev));
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root = OF_finddevice("/");
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if (parent != root)
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return (ENXIO);
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compat = ofw_bus_get_compat(dev);
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if (compat != NULL)
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return (ENXIO);
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device_set_desc(dev, "OFW Firmware Group");
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return (BUS_PROBE_GENERIC);
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}
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static int
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ofw_firmware_attach(device_t dev)
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{
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struct ofw_firmware_softc *sc;
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phandle_t node, child;
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device_t cdev;
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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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if (OF_getencprop(node, "#address-cells", &sc->sc.acells,
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sizeof(sc->sc.acells)) == -1) {
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if (OF_getencprop(OF_parent(node), "#address-cells", &sc->sc.acells,
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sizeof(sc->sc.acells)) == -1) {
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sc->sc.acells = 2;
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}
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}
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if (OF_getencprop(node, "#size-cells", &sc->sc.scells,
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sizeof(sc->sc.scells)) == -1) {
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if (OF_getencprop(OF_parent(node), "#size-cells", &sc->sc.scells,
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sizeof(sc->sc.scells)) == -1) {
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sc->sc.scells = 1;
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}
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}
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for (child = OF_child(node); child != 0; child = OF_peer(child)) {
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cdev = ofw_firmware_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 ofw_firmware_methods[] = {
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/* device_if */
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DEVMETHOD(device_probe, ofw_firmware_probe),
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DEVMETHOD(device_attach, ofw_firmware_attach),
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DEVMETHOD_END
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};
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DEFINE_CLASS_1(ofw_firmware, ofw_firmware_driver, ofw_firmware_methods,
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sizeof(struct ofw_firmware_softc), simplebus_driver);
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EARLY_DRIVER_MODULE(ofw_firmware, simplebus, ofw_firmware_driver, 0, 0,
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BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
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MODULE_VERSION(ofw_firmware, 1);
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