fdt: Add support for simple-mfd bus
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
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=342008
@ -1762,6 +1762,7 @@ dev/fdt/fdt_slicer.c optional fdt cfi | fdt nand | fdt mx25l | fdt n25q
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dev/fdt/fdt_static_dtb.S optional fdt fdt_dtb_static \
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dev/fdt/fdt_static_dtb.S optional fdt fdt_dtb_static \
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dependency "fdt_dtb_file"
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dependency "fdt_dtb_file"
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dev/fdt/simplebus.c optional fdt
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dev/fdt/simplebus.c optional fdt
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dev/fdt/simple_mfd.c optional fdt
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dev/fe/if_fe.c optional fe
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dev/fe/if_fe.c optional fe
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dev/fe/if_fe_pccard.c optional fe pccard
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dev/fe/if_fe_pccard.c optional fe pccard
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dev/filemon/filemon.c optional filemon
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dev/filemon/filemon.c optional filemon
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176
sys/dev/fdt/simple_mfd.c
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176
sys/dev/fdt/simple_mfd.c
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@ -0,0 +1,176 @@
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/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2018 Rubicon Communications, LLC (Netgate)
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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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*/
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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/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.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/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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struct simple_mfd_softc {
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struct simplebus_softc sc;
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};
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device_t simple_mfd_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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struct simplebus_devinfo *simple_mfd_setup_dinfo(device_t dev, phandle_t node, struct simplebus_devinfo *di);
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static int
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simple_mfd_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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if (!ofw_bus_is_compatible(dev, "simple-mfd"))
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return (ENXIO);
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device_set_desc(dev, "Simple MFD (Multi-Functions Device)");
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return (BUS_PROBE_GENERIC);
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}
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static int
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simple_mfd_attach(device_t dev)
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{
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struct simple_mfd_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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node = ofw_bus_get_node(dev);
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/* Parse address-cells and size-cells from the parent node as a fallback */
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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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/* If the node has a ranges prop, parse it so children mapping will be done correctly */
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if (OF_hasprop(node, "ranges")) {
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if (simplebus_fill_ranges(node, &sc->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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/* Attach child devices */
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for (child = OF_child(node); child > 0; child = OF_peer(child)) {
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cdev = simple_mfd_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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struct simplebus_devinfo *
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simple_mfd_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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device_t
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simple_mfd_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 = simple_mfd_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_method_t simple_mfd_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, simple_mfd_probe),
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DEVMETHOD(device_attach, simple_mfd_attach),
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DEVMETHOD_END
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};
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DEFINE_CLASS_1(simple_mfd, simple_mfd_driver, simple_mfd_methods,
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sizeof(struct simple_mfd_softc), simplebus_driver);
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static devclass_t simple_mfd_devclass;
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EARLY_DRIVER_MODULE(simple_mfd, simplebus, simple_mfd_driver,
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simple_mfd_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_LATE);
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MODULE_VERSION(simple_mfd, 1);
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@ -61,13 +61,6 @@ static struct resource_list *simplebus_get_resource_list(device_t bus,
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static const struct ofw_bus_devinfo *simplebus_get_devinfo(device_t bus,
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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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device_t child);
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/*
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* local methods
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*/
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static int simplebus_fill_ranges(phandle_t node,
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struct simplebus_softc *sc);
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/*
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/*
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* Driver methods.
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* Driver methods.
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*/
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*/
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@ -184,7 +177,7 @@ simplebus_init(device_t dev, phandle_t node)
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OF_getencprop(node, "#size-cells", &sc->scells, sizeof(sc->scells));
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OF_getencprop(node, "#size-cells", &sc->scells, sizeof(sc->scells));
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}
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}
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static int
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int
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simplebus_fill_ranges(phandle_t node, struct simplebus_softc *sc)
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simplebus_fill_ranges(phandle_t node, struct simplebus_softc *sc)
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{
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{
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int host_address_cells;
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int host_address_cells;
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@ -61,4 +61,6 @@ device_t 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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const char *name, int unit, struct simplebus_devinfo *di);
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struct simplebus_devinfo *simplebus_setup_dinfo(device_t dev, phandle_t node,
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struct simplebus_devinfo *simplebus_setup_dinfo(device_t dev, phandle_t node,
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struct simplebus_devinfo *di);
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struct simplebus_devinfo *di);
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int simplebus_fill_ranges(phandle_t node,
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struct simplebus_softc *sc);
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#endif /* _FDT_SIMPLEBUS_H */
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#endif /* _FDT_SIMPLEBUS_H */
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