Author: loos
Date: Thu Oct 24 16:56:38 2013
New Revision: 257064
URL: http://svnweb.freebsd.org/changeset/base/257064
Log:
Add an OFW SPI compatible bus. Fix the spibus probe to return
BUS_PROBE_GENERIC and not BUS_PROBE_SPECIFIC (0) so the OFW SPI bus can
attach when enabled. Export the spibus devclass_t and driver_t
declarations.
Submitted by: ray
Approved by: adrian (mentor)
Added:
head/sys/dev/spibus/ofw_spibus.c (contents, props changed)
Modified:
head/sys/conf/files
head/sys/dev/spibus/spibus.c
head/sys/dev/spibus/spibusvar.h
Modified: head/sys/conf/files
==============================================================================
--- head/sys/conf/files Thu Oct 24 16:42:48 2013 (r257063)
+++ head/sys/conf/files Thu Oct 24 16:56:38 2013 (r257064)
@@ -2177,6 +2177,7 @@ dev/sound/midi/mpu_if.m optional sound
dev/sound/midi/mpufoi_if.m optional sound
dev/sound/midi/sequencer.c optional sound
dev/sound/midi/synth_if.m optional sound
+dev/spibus/ofw_spibus.c optional fdt spibus
dev/spibus/spibus.c optional spibus \
dependency "spibus_if.h"
dev/spibus/spibus_if.m optional spibus
Added: head/sys/dev/spibus/ofw_spibus.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/spibus/ofw_spibus.c Thu Oct 24 16:56:38 2013
(r257064)
@@ -0,0 +1,192 @@
+/*-
+ * Copyright (c) 2009, Nathan Whitehorn <nwhiteh...@freebsd.org>
+ * Copyright (c) 2013 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * Portions of this software were developed by Oleksandr Rybalko
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * 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 unmodified, 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 ``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 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/bus.h>
+#include <sys/kernel.h>
+#include <sys/libkern.h>
+#include <sys/lock.h>
+#include <sys/module.h>
+#include <sys/mutex.h>
+
+#include <dev/fdt/fdt_common.h>
+#include <dev/spibus/spi.h>
+#include <dev/spibus/spibusvar.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+#include <dev/ofw/openfirm.h>
+
+#include "spibus_if.h"
+
+struct ofw_spibus_devinfo {
+ struct spibus_ivar opd_dinfo;
+ struct ofw_bus_devinfo opd_obdinfo;
+};
+
+/* Methods */
+static device_probe_t ofw_spibus_probe;
+static device_attach_t ofw_spibus_attach;
+static device_t ofw_spibus_add_child(device_t dev, u_int order,
+ const char *name, int unit);
+static const struct ofw_bus_devinfo *ofw_spibus_get_devinfo(device_t bus,
+ device_t dev);
+
+static int
+ofw_spibus_probe(device_t dev)
+{
+
+ if (ofw_bus_get_node(dev) == -1)
+ return (ENXIO);
+ device_set_desc(dev, "OFW SPI bus");
+
+ return (0);
+}
+
+static int
+ofw_spibus_attach(device_t dev)
+{
+ struct spibus_softc *sc = device_get_softc(dev);
+ struct ofw_spibus_devinfo *dinfo;
+ phandle_t child;
+ pcell_t paddr;
+ device_t childdev;
+
+ sc->dev = dev;
+
+ bus_generic_probe(dev);
+ bus_enumerate_hinted_children(dev);
+
+ /*
+ * Attach those children represented in the device tree.
+ */
+ for (child = OF_child(ofw_bus_get_node(dev)); child != 0;
+ child = OF_peer(child)) {
+ /*
+ * Try to get the CS number first from the spi-chipselect
+ * property, then try the reg property.
+ */
+ if (OF_getencprop(child, "spi-chipselect", &paddr,
+ sizeof(paddr)) == -1) {
+ if (OF_getencprop(child, "reg", &paddr,
+ sizeof(paddr)) == -1)
+ continue;
+ }
+
+ /*
+ * Now set up the SPI and OFW bus layer devinfo and add it
+ * to the bus.
+ */
+ dinfo = malloc(sizeof(struct ofw_spibus_devinfo), M_DEVBUF,
+ M_NOWAIT | M_ZERO);
+ if (dinfo == NULL)
+ continue;
+ dinfo->opd_dinfo.cs = paddr;
+ if (ofw_bus_gen_setup_devinfo(&dinfo->opd_obdinfo, child) !=
+ 0) {
+ free(dinfo, M_DEVBUF);
+ continue;
+ }
+ childdev = device_add_child(dev, NULL, -1);
+ device_set_ivars(childdev, dinfo);
+ }
+
+ return (bus_generic_attach(dev));
+}
+
+static device_t
+ofw_spibus_add_child(device_t dev, u_int order, const char *name, int unit)
+{
+ device_t child;
+ struct ofw_spibus_devinfo *devi;
+
+ child = device_add_child_ordered(dev, order, name, unit);
+ if (child == NULL)
+ return (child);
+ devi = malloc(sizeof(struct ofw_spibus_devinfo), M_DEVBUF,
+ M_NOWAIT | M_ZERO);
+ if (devi == NULL) {
+ device_delete_child(dev, child);
+ return (0);
+ }
+
+ /*
+ * NULL all the OFW-related parts of the ivars for non-OFW
+ * children.
+ */
+ devi->opd_obdinfo.obd_node = -1;
+ devi->opd_obdinfo.obd_name = NULL;
+ devi->opd_obdinfo.obd_compat = NULL;
+ devi->opd_obdinfo.obd_type = NULL;
+ devi->opd_obdinfo.obd_model = NULL;
+
+ device_set_ivars(child, devi);
+
+ return (child);
+}
+
+static const struct ofw_bus_devinfo *
+ofw_spibus_get_devinfo(device_t bus, device_t dev)
+{
+ struct ofw_spibus_devinfo *dinfo;
+
+ dinfo = device_get_ivars(dev);
+ return (&dinfo->opd_obdinfo);
+}
+
+static device_method_t ofw_spibus_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, ofw_spibus_probe),
+ DEVMETHOD(device_attach, ofw_spibus_attach),
+
+ /* Bus interface */
+ DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
+ DEVMETHOD(bus_add_child, ofw_spibus_add_child),
+
+ /* ofw_bus interface */
+ DEVMETHOD(ofw_bus_get_devinfo, ofw_spibus_get_devinfo),
+ DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
+ DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
+ DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
+ DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
+ DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
+
+ DEVMETHOD_END
+};
+
+static devclass_t ofwspibus_devclass;
+
+DEFINE_CLASS_1(spibus, ofw_spibus_driver, ofw_spibus_methods,
+ sizeof(struct spibus_softc), spibus_driver);
+DRIVER_MODULE(ofw_spibus, spi, ofw_spibus_driver, ofwspibus_devclass, 0, 0);
+MODULE_VERSION(ofw_spibus, 1);
+MODULE_DEPEND(ofw_spibus, spibus, 1, 1, 1);
Modified: head/sys/dev/spibus/spibus.c
==============================================================================
--- head/sys/dev/spibus/spibus.c Thu Oct 24 16:42:48 2013
(r257063)
+++ head/sys/dev/spibus/spibus.c Thu Oct 24 16:56:38 2013
(r257064)
@@ -23,7 +23,7 @@ static int
spibus_probe(device_t dev)
{
device_set_desc(dev, "spibus bus");
- return (0);
+ return (BUS_PROBE_GENERIC);
}
static int
@@ -185,7 +185,7 @@ static device_method_t spibus_methods[]
DEVMETHOD_END
};
-static driver_t spibus_driver = {
+driver_t spibus_driver = {
"spibus",
spibus_methods,
sizeof(struct spibus_softc)
Modified: head/sys/dev/spibus/spibusvar.h
==============================================================================
--- head/sys/dev/spibus/spibusvar.h Thu Oct 24 16:42:48 2013
(r257063)
+++ head/sys/dev/spibus/spibusvar.h Thu Oct 24 16:56:38 2013
(r257064)
@@ -26,3 +26,6 @@ spibus_get_ ## A(device_t dev, T *t)
}
SPIBUS_ACCESSOR(cs, CS, uint32_t)
+
+extern driver_t spibus_driver;
+extern devclass_t spibus_devclass;
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