Page MenuHomeFreeBSD
Files F168717784

D59188.id185128.diff
No OneTemporary
Actions

D59188.id185128.diff
View Options

diff --git a/sys/conf/files b/sys/conf/files
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -2440,6 +2440,7 @@
dev/md/md.c optional md
dev/mdio/mdio_if.m optional miiproxy | mdio
dev/mdio/mdio.c optional miiproxy | mdio
+dev/mdio/mdio_fdt.c optional mdio fdt
dev/mem/memdev.c optional mem
dev/mem/memutil.c optional mem
dev/mfi/mfi.c optional mfi
diff --git a/sys/dev/mdio/mdio.h b/sys/dev/mdio/mdio.h
--- a/sys/dev/mdio/mdio.h
+++ b/sys/dev/mdio/mdio.h
@@ -28,6 +28,7 @@
#define __DEV_MDIO_MDIO_H__
extern driver_t mdio_driver;
+DECLARE_CLASS(mdio_fdt_driver);
#define MDIO_DEVADDR_NONE -1 /**< Use clause 22 register access */
diff --git a/sys/dev/mdio/mdio.c b/sys/dev/mdio/mdio.c
--- a/sys/dev/mdio/mdio.c
+++ b/sys/dev/mdio/mdio.c
@@ -24,11 +24,17 @@
* SUCH DAMAGE.
*/
+#include "opt_platform.h"
+
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/systm.h>
#include <sys/module.h>
+#ifdef FDT
+#include <dev/ofw/ofw_bus.h>
+#endif
+
#include <dev/mdio/mdio.h>
#include "mdio_if.h"
@@ -37,6 +43,14 @@
mdio_identify(driver_t *driver, device_t parent)
{
+#ifdef FDT
+ /*
+ * Leave FDT-visible parents to mdio_fdt(4); it will enumerate the
+ * "mdio-bus" DT node's children as first-class newbus devices.
+ */
+ if (ofw_bus_get_node(parent) != -1)
+ return;
+#endif
if (device_find_child(parent, mdio_driver.name, DEVICE_UNIT_ANY) == NULL)
BUS_ADD_CHILD(parent, 0, mdio_driver.name, DEVICE_UNIT_ANY);
}
diff --git a/sys/dev/mdio/mdio_fdt.c b/sys/dev/mdio/mdio_fdt.c
new file mode 100644
--- /dev/null
+++ b/sys/dev/mdio/mdio_fdt.c
@@ -0,0 +1,120 @@
+/*-
+ * Copyright (c) 2026 Justin Hibbits
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * FDT flavour of the generic mdio(4) bus shim.
+ *
+ * To use this, add an attachment to the parent driver.
+ *
+ * MDIO_READREG / MDIO_WRITEREG (and the clause-45 variants) are
+ * inherited from mdio_driver.
+ */
+
+#include "opt_platform.h"
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/module.h>
+#include <sys/systm.h>
+
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+#include <dev/mdio/mdio.h>
+
+#include "mdio_if.h"
+#include "ofw_bus_if.h"
+
+struct mdio_fdt_ivars {
+ struct ofw_bus_devinfo obd;
+};
+
+static void
+mdio_fdt_identify(driver_t *driver, device_t parent)
+{
+
+ /* Leave hint-only parents to the base mdio(4) driver. */
+ if (ofw_bus_get_node(parent) == -1)
+ return;
+ if (device_find_child(parent, driver->name, DEVICE_UNIT_ANY) == NULL)
+ BUS_ADD_CHILD(parent, 0, driver->name, DEVICE_UNIT_ANY);
+}
+
+static int
+mdio_fdt_probe(device_t dev)
+{
+
+ if (ofw_bus_get_node(device_get_parent(dev)) == -1)
+ return (ENXIO);
+ device_set_desc(dev, "OFW MDIO");
+ return (BUS_PROBE_SPECIFIC);
+}
+
+static int
+mdio_fdt_attach(device_t dev)
+{
+ struct mdio_fdt_ivars *ivars;
+ phandle_t node, child;
+ device_t cdev;
+
+ /*
+ * The parent controller owns the mdio-bus DT node; its children
+ * (ethernet-phy@N, switch@N, ...) are the mdio devices we hand to
+ * newbus.
+ */
+ node = ofw_bus_get_node(device_get_parent(dev));
+ for (child = OF_child(node); child != 0; child = OF_peer(child)) {
+ if (!OF_hasprop(child, "reg"))
+ continue;
+ ivars = malloc(sizeof(*ivars), M_DEVBUF, M_WAITOK | M_ZERO);
+ if (ofw_bus_gen_setup_devinfo(&ivars->obd, child) != 0) {
+ free(ivars, M_DEVBUF);
+ continue;
+ }
+ cdev = device_add_child(dev, NULL, DEVICE_UNIT_ANY);
+ if (cdev == NULL) {
+ ofw_bus_gen_destroy_devinfo(&ivars->obd);
+ free(ivars, M_DEVBUF);
+ continue;
+ }
+ device_set_ivars(cdev, ivars);
+ }
+
+ bus_identify_children(dev);
+ bus_enumerate_hinted_children(dev);
+ bus_attach_children(dev);
+ return (0);
+}
+
+static const struct ofw_bus_devinfo *
+mdio_fdt_get_devinfo(device_t bus __unused, device_t child)
+{
+ struct mdio_fdt_ivars *ivars;
+
+ ivars = device_get_ivars(child);
+ return (ivars == NULL ? NULL : &ivars->obd);
+}
+
+static device_method_t mdio_fdt_methods[] = {
+ /* Device interface -- override the base's identify/probe/attach. */
+ DEVMETHOD(device_identify, mdio_fdt_identify),
+ DEVMETHOD(device_probe, mdio_fdt_probe),
+ DEVMETHOD(device_attach, mdio_fdt_attach),
+
+ /* ofw_bus interface -- expose devinfo of the FDT children we added. */
+ DEVMETHOD(ofw_bus_get_devinfo, mdio_fdt_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
+};
+
+DEFINE_CLASS_1(mdio, mdio_fdt_driver, mdio_fdt_methods, 0, mdio_driver);
+
+MODULE_VERSION(mdio_fdt, 1);
+MODULE_DEPEND(mdio_fdt, mdio, 1, 1, 1);

File Metadata

Mime Type
text/plain
Expires
Sun, Aug 30, 7:18 PM (16 h, 39 m)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
37499229
Default Alt Text
D59188.id185128.diff (4 KB)

Event Timeline