Author: manu
Date: Wed Dec 12 21:56:45 2018
New Revision: 342008
URL: https://svnweb.freebsd.org/changeset/base/342008
Log:
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
Added:
head/sys/dev/fdt/simple_mfd.c (contents, props changed)
Modified:
head/sys/conf/files
head/sys/dev/fdt/simplebus.c
head/sys/dev/fdt/simplebus.h
Modified: head/sys/conf/files
==============================================================================
--- head/sys/conf/files Wed Dec 12 21:25:52 2018 (r342007)
+++ head/sys/conf/files Wed Dec 12 21:56:45 2018 (r342008)
@@ -1762,6 +1762,7 @@ dev/fdt/fdt_slicer.c optional fdt cfi | fdt
nand | fd
dev/fdt/fdt_static_dtb.S optional fdt fdt_dtb_static \
dependency "fdt_dtb_file"
dev/fdt/simplebus.c optional fdt
+dev/fdt/simple_mfd.c optional fdt
dev/fe/if_fe.c optional fe
dev/fe/if_fe_pccard.c optional fe pccard
dev/filemon/filemon.c optional filemon
Added: head/sys/dev/fdt/simple_mfd.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/fdt/simple_mfd.c Wed Dec 12 21:56:45 2018
(r342008)
@@ -0,0 +1,176 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2018 Rubicon Communications, LLC (Netgate)
+ *
+ * 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/bus.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+
+#include <machine/bus.h>
+
+#include <dev/fdt/simplebus.h>
+
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+struct simple_mfd_softc {
+ struct simplebus_softc sc;
+};
+
+device_t simple_mfd_add_device(device_t dev, phandle_t node, u_int order,
+ const char *name, int unit, struct simplebus_devinfo *di);
+struct simplebus_devinfo *simple_mfd_setup_dinfo(device_t dev, phandle_t node,
struct simplebus_devinfo *di);
+
+static int
+simple_mfd_probe(device_t dev)
+{
+
+ if (!ofw_bus_status_okay(dev))
+ return (ENXIO);
+ if (!ofw_bus_is_compatible(dev, "simple-mfd"))
+ return (ENXIO);
+
+ device_set_desc(dev, "Simple MFD (Multi-Functions Device)");
+
+ return (BUS_PROBE_GENERIC);
+}
+
+static int
+simple_mfd_attach(device_t dev)
+{
+ struct simple_mfd_softc *sc;
+ phandle_t node, child;
+ device_t cdev;
+
+ sc = device_get_softc(dev);
+ node = ofw_bus_get_node(dev);
+
+ /* Parse address-cells and size-cells from the parent node as a
fallback */
+ 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;
+ }
+ }
+
+ /* If the node has a ranges prop, parse it so children mapping will be
done correctly */
+ if (OF_hasprop(node, "ranges")) {
+ if (simplebus_fill_ranges(node, &sc->sc) < 0) {
+ device_printf(dev, "could not get ranges\n");
+ return (ENXIO);
+ }
+ }
+
+ /* Attach child devices */
+ for (child = OF_child(node); child > 0; child = OF_peer(child)) {
+ cdev = simple_mfd_add_device(dev, child, 0, NULL, -1, NULL);
+ if (cdev != NULL)
+ device_probe_and_attach(cdev);
+ }
+
+ return (bus_generic_attach(dev));
+}
+
+struct simplebus_devinfo *
+simple_mfd_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);
+}
+
+device_t
+simple_mfd_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 = simple_mfd_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 device_method_t simple_mfd_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, simple_mfd_probe),
+ DEVMETHOD(device_attach, simple_mfd_attach),
+
+ DEVMETHOD_END
+};
+
+DEFINE_CLASS_1(simple_mfd, simple_mfd_driver, simple_mfd_methods,
+ sizeof(struct simple_mfd_softc), simplebus_driver);
+
+static devclass_t simple_mfd_devclass;
+
+EARLY_DRIVER_MODULE(simple_mfd, simplebus, simple_mfd_driver,
+ simple_mfd_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_LATE);
+MODULE_VERSION(simple_mfd, 1);
Modified: head/sys/dev/fdt/simplebus.c
==============================================================================
--- head/sys/dev/fdt/simplebus.c Wed Dec 12 21:25:52 2018
(r342007)
+++ head/sys/dev/fdt/simplebus.c Wed Dec 12 21:56:45 2018
(r342008)
@@ -62,13 +62,6 @@ static const struct ofw_bus_devinfo *simplebus_get_dev
device_t child);
/*
- * local methods
- */
-
-static int simplebus_fill_ranges(phandle_t node,
- struct simplebus_softc *sc);
-
-/*
* Driver methods.
*/
static device_method_t simplebus_methods[] = {
@@ -184,7 +177,7 @@ simplebus_init(device_t dev, phandle_t node)
OF_getencprop(node, "#size-cells", &sc->scells, sizeof(sc->scells));
}
-static int
+int
simplebus_fill_ranges(phandle_t node, struct simplebus_softc *sc)
{
int host_address_cells;
Modified: head/sys/dev/fdt/simplebus.h
==============================================================================
--- head/sys/dev/fdt/simplebus.h Wed Dec 12 21:25:52 2018
(r342007)
+++ head/sys/dev/fdt/simplebus.h Wed Dec 12 21:56:45 2018
(r342008)
@@ -61,4 +61,6 @@ device_t simplebus_add_device(device_t dev, phandle_t
const char *name, int unit, struct simplebus_devinfo *di);
struct simplebus_devinfo *simplebus_setup_dinfo(device_t dev, phandle_t node,
struct simplebus_devinfo *di);
+int simplebus_fill_ranges(phandle_t node,
+ struct simplebus_softc *sc);
#endif /* _FDT_SIMPLEBUS_H */
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