da93ed974d
Quoting the binding Documentation : "These devices comprise a nexus for heterogeneous hardware blocks containing more than one non-unique yet varying hardware functionality." Reviewed by: loos Sponsored by: Rubicon Communications, LLC ("Netgate") Differential Revision: https://reviews.freebsd.org/D17751
425 lines
12 KiB
C
425 lines
12 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2013 Nathan Whitehorn
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* All rights reserved.
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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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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/rman.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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#include <dev/fdt/simplebus.h>
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/*
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* Bus interface.
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*/
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static int simplebus_probe(device_t dev);
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static int simplebus_attach(device_t dev);
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static struct resource *simplebus_alloc_resource(device_t, device_t, int,
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int *, rman_res_t, rman_res_t, rman_res_t, u_int);
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static void simplebus_probe_nomatch(device_t bus, device_t child);
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static int simplebus_print_child(device_t bus, device_t child);
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static device_t simplebus_add_child(device_t dev, u_int order,
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const char *name, int unit);
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static struct resource_list *simplebus_get_resource_list(device_t bus,
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device_t child);
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/*
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* ofw_bus interface
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*/
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static const struct ofw_bus_devinfo *simplebus_get_devinfo(device_t bus,
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device_t child);
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/*
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* Driver methods.
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*/
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static device_method_t simplebus_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, simplebus_probe),
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DEVMETHOD(device_attach, simplebus_attach),
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DEVMETHOD(device_detach, bus_generic_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, bus_generic_resume),
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/* Bus interface */
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DEVMETHOD(bus_add_child, simplebus_add_child),
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DEVMETHOD(bus_print_child, simplebus_print_child),
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DEVMETHOD(bus_probe_nomatch, simplebus_probe_nomatch),
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DEVMETHOD(bus_read_ivar, bus_generic_read_ivar),
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DEVMETHOD(bus_write_ivar, bus_generic_write_ivar),
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DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
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DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
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DEVMETHOD(bus_alloc_resource, simplebus_alloc_resource),
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DEVMETHOD(bus_release_resource, bus_generic_release_resource),
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DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
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DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
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DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
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DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
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DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
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DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
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DEVMETHOD(bus_get_resource_list, simplebus_get_resource_list),
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/* ofw_bus interface */
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DEVMETHOD(ofw_bus_get_devinfo, simplebus_get_devinfo),
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DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
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DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
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DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
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DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
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DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
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DEVMETHOD_END
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};
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DEFINE_CLASS_0(simplebus, simplebus_driver, simplebus_methods,
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sizeof(struct simplebus_softc));
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static devclass_t simplebus_devclass;
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EARLY_DRIVER_MODULE(simplebus, ofwbus, simplebus_driver, simplebus_devclass,
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0, 0, BUS_PASS_BUS);
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EARLY_DRIVER_MODULE(simplebus, simplebus, simplebus_driver, simplebus_devclass,
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0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
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static int
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simplebus_probe(device_t dev)
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{
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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/*
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* FDT data puts a "simple-bus" compatible string on many things that
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* have children but aren't really buses in our world. Without a
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* ranges property we will fail to attach, so just fail to probe too.
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*/
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if (!(ofw_bus_is_compatible(dev, "simple-bus") &&
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ofw_bus_has_prop(dev, "ranges")) &&
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(ofw_bus_get_type(dev) == NULL || strcmp(ofw_bus_get_type(dev),
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"soc") != 0))
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return (ENXIO);
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device_set_desc(dev, "Flattened device tree simple bus");
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return (BUS_PROBE_GENERIC);
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}
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static int
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simplebus_attach(device_t dev)
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{
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struct simplebus_softc *sc;
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phandle_t node;
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sc = device_get_softc(dev);
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simplebus_init(dev, 0);
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if (simplebus_fill_ranges(sc->node, 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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/*
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* In principle, simplebus could have an interrupt map, but ignore that
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* for now
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*/
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for (node = OF_child(sc->node); node > 0; node = OF_peer(node))
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simplebus_add_device(dev, node, 0, NULL, -1, NULL);
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return (bus_generic_attach(dev));
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}
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void
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simplebus_init(device_t dev, phandle_t node)
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{
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struct simplebus_softc *sc;
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sc = device_get_softc(dev);
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if (node == 0)
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node = ofw_bus_get_node(dev);
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sc->dev = dev;
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sc->node = node;
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/*
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* Some important numbers
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*/
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sc->acells = 2;
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OF_getencprop(node, "#address-cells", &sc->acells, sizeof(sc->acells));
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sc->scells = 1;
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OF_getencprop(node, "#size-cells", &sc->scells, sizeof(sc->scells));
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}
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int
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simplebus_fill_ranges(phandle_t node, struct simplebus_softc *sc)
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{
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int host_address_cells;
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cell_t *base_ranges;
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ssize_t nbase_ranges;
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int err;
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int i, j, k;
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err = OF_searchencprop(OF_parent(node), "#address-cells",
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&host_address_cells, sizeof(host_address_cells));
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if (err <= 0)
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return (-1);
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nbase_ranges = OF_getproplen(node, "ranges");
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if (nbase_ranges < 0)
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return (-1);
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sc->nranges = nbase_ranges / sizeof(cell_t) /
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(sc->acells + host_address_cells + sc->scells);
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if (sc->nranges == 0)
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return (0);
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sc->ranges = malloc(sc->nranges * sizeof(sc->ranges[0]),
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M_DEVBUF, M_WAITOK);
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base_ranges = malloc(nbase_ranges, M_DEVBUF, M_WAITOK);
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OF_getencprop(node, "ranges", base_ranges, nbase_ranges);
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for (i = 0, j = 0; i < sc->nranges; i++) {
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sc->ranges[i].bus = 0;
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for (k = 0; k < sc->acells; k++) {
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sc->ranges[i].bus <<= 32;
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sc->ranges[i].bus |= base_ranges[j++];
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}
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sc->ranges[i].host = 0;
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for (k = 0; k < host_address_cells; k++) {
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sc->ranges[i].host <<= 32;
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sc->ranges[i].host |= base_ranges[j++];
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}
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sc->ranges[i].size = 0;
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for (k = 0; k < sc->scells; k++) {
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sc->ranges[i].size <<= 32;
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sc->ranges[i].size |= base_ranges[j++];
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}
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}
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free(base_ranges, M_DEVBUF);
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return (sc->nranges);
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}
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struct simplebus_devinfo *
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simplebus_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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resource_list_init(&ndi->rl);
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ofw_bus_reg_to_rl(dev, 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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device_t
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simplebus_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 = simplebus_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 device_t
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simplebus_add_child(device_t dev, u_int order, const char *name, int unit)
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{
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device_t cdev;
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struct simplebus_devinfo *ndi;
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cdev = device_add_child_ordered(dev, order, name, unit);
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if (cdev == NULL)
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return (NULL);
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ndi = malloc(sizeof(*ndi), M_DEVBUF, M_WAITOK | M_ZERO);
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ndi->obdinfo.obd_node = -1;
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resource_list_init(&ndi->rl);
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device_set_ivars(cdev, ndi);
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return (cdev);
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}
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static const struct ofw_bus_devinfo *
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simplebus_get_devinfo(device_t bus __unused, device_t child)
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{
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struct simplebus_devinfo *ndi;
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ndi = device_get_ivars(child);
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if (ndi == NULL)
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return (NULL);
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return (&ndi->obdinfo);
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}
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static struct resource_list *
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simplebus_get_resource_list(device_t bus __unused, device_t child)
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{
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struct simplebus_devinfo *ndi;
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ndi = device_get_ivars(child);
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if (ndi == NULL)
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return (NULL);
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return (&ndi->rl);
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}
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static struct resource *
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simplebus_alloc_resource(device_t bus, device_t child, int type, int *rid,
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rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
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{
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struct simplebus_softc *sc;
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struct simplebus_devinfo *di;
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struct resource_list_entry *rle;
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int j;
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sc = device_get_softc(bus);
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/*
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* Request for the default allocation with a given rid: use resource
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* list stored in the local device info.
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*/
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if (RMAN_IS_DEFAULT_RANGE(start, end)) {
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if ((di = device_get_ivars(child)) == NULL)
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return (NULL);
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if (type == SYS_RES_IOPORT)
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type = SYS_RES_MEMORY;
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rle = resource_list_find(&di->rl, type, *rid);
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if (rle == NULL) {
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if (bootverbose)
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device_printf(bus, "no default resources for "
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"rid = %d, type = %d\n", *rid, type);
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return (NULL);
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}
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start = rle->start;
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end = rle->end;
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count = rle->count;
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}
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if (type == SYS_RES_MEMORY) {
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/* Remap through ranges property */
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for (j = 0; j < sc->nranges; j++) {
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if (start >= sc->ranges[j].bus && end <
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sc->ranges[j].bus + sc->ranges[j].size) {
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start -= sc->ranges[j].bus;
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start += sc->ranges[j].host;
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end -= sc->ranges[j].bus;
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end += sc->ranges[j].host;
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break;
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}
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}
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if (j == sc->nranges && sc->nranges != 0) {
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if (bootverbose)
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device_printf(bus, "Could not map resource "
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"%#jx-%#jx\n", start, end);
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return (NULL);
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}
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}
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return (bus_generic_alloc_resource(bus, child, type, rid, start, end,
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count, flags));
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}
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static int
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simplebus_print_res(struct simplebus_devinfo *di)
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{
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int rv;
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if (di == NULL)
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return (0);
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rv = 0;
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rv += resource_list_print_type(&di->rl, "mem", SYS_RES_MEMORY, "%#jx");
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rv += resource_list_print_type(&di->rl, "irq", SYS_RES_IRQ, "%jd");
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return (rv);
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}
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static void
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simplebus_probe_nomatch(device_t bus, device_t child)
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{
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const char *name, *type, *compat;
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if (!bootverbose)
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return;
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compat = ofw_bus_get_compat(child);
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if (compat == NULL)
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return;
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name = ofw_bus_get_name(child);
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type = ofw_bus_get_type(child);
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device_printf(bus, "<%s>", name != NULL ? name : "unknown");
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simplebus_print_res(device_get_ivars(child));
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if (!ofw_bus_status_okay(child))
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printf(" disabled");
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if (type)
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printf(" type %s", type);
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printf(" compat %s (no driver attached)\n", compat);
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}
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static int
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simplebus_print_child(device_t bus, device_t child)
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{
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int rv;
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rv = bus_print_child_header(bus, child);
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rv += simplebus_print_res(device_get_ivars(child));
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if (!ofw_bus_status_okay(child))
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rv += printf(" disabled");
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rv += bus_print_child_footer(bus, child);
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return (rv);
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}
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