Differential D21335 Diff 70242 head/sys/arm64/broadcom/brcmmdio/mdio_nexus_iproc.c

Changeset View

Standalone View

head/sys/arm64/broadcom/brcmmdio/mdio_nexus_iproc.c

Property	Old Value	New Value
svn:eol-style	null	native \ No newline at end of property
svn:keywords	null	FreeBSD=%H \ No newline at end of property
svn:mime-type	null	text/plain \ No newline at end of property

				/*-
				* Copyright (c) 2019 Juniper Networks, Inc.
				* Copyright (c) 2019 Semihalf.
				* All rights reserved.
				*
				* 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 ``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/module.h>
				#include <sys/rman.h>
				#include <sys/systm.h>

				#include <dev/fdt/simplebus.h>
				#include <dev/ofw/ofw_bus_subr.h>
				#include <dev/ofw/ofw_bus.h>

				#include <machine/bus.h>
				#include <machine/resource.h>

				#include "mdio_if.h"

				MALLOC_DEFINE(M_BRCM_IPROC_NEXUS, "Broadcom IPROC MDIO NEXUS",
				"Broadcom IPROC MDIO NEXUS dynamic memory");

				struct brcm_mdionexus_softc {
				struct simplebus_softc simplebus_sc;
				uint32_t mux_id;
				};

				/* OFW bus interface */
				struct brcm_mdionexus_ofw_devinfo {
				struct ofw_bus_devinfo di_dinfo;
				struct resource_list di_rl;
				};

				static device_probe_t brcm_mdionexus_fdt_probe;
				static device_attach_t brcm_mdionexus_fdt_attach;

				static const struct ofw_bus_devinfo * brcm_mdionexus_ofw_get_devinfo(device_t,
				device_t);
				static int brcm_mdionexus_mdio_readreg(device_t, int, int);
				static int brcm_mdionexus_mdio_writereg(device_t, int, int, int);

				static device_method_t brcm_mdionexus_fdt_methods[] = {
				/* Device interface */
				DEVMETHOD(device_probe, brcm_mdionexus_fdt_probe),
				DEVMETHOD(device_attach, brcm_mdionexus_fdt_attach),

				/* Bus interface */
				DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
				DEVMETHOD(bus_release_resource, bus_generic_release_resource),
				DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),

				/* ofw_bus interface */
				DEVMETHOD(ofw_bus_get_devinfo, brcm_mdionexus_ofw_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),

				/* MDIO interface */
				/* MDIO interface */
				DEVMETHOD(mdio_readreg, brcm_mdionexus_mdio_readreg),
				DEVMETHOD(mdio_writereg, brcm_mdionexus_mdio_writereg),

				DEVMETHOD_END
				};

				DEFINE_CLASS_0(brcm_mdionexus, brcm_mdionexus_fdt_driver, brcm_mdionexus_fdt_methods,
				sizeof(struct brcm_mdionexus_softc));

				static devclass_t brcm_mdionexus_fdt_devclass;

				static driver_t brcm_mdionexus_driver = {
				"brcm_mdionexus",
				brcm_mdionexus_fdt_methods,
				sizeof(struct brcm_mdionexus_softc)
				};
				EARLY_DRIVER_MODULE(brcm_mdionexus, brcm_iproc_mdio, brcm_mdionexus_driver,
				brcm_mdionexus_fdt_devclass, NULL, NULL, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);

				static int brcm_mdionexus_ofw_bus_attach(device_t);

				static int
				brcm_mdionexus_mdio_readreg(device_t dev, int phy, int reg)
				{
				struct brcm_mdionexus_softc *sc;

				sc = device_get_softc(dev);

				return (MDIO_READREG_MUX(device_get_parent(dev),
				sc->mux_id, phy, reg));
				}

				static int
				brcm_mdionexus_mdio_writereg(device_t dev, int phy, int reg, int val)
				{
				struct brcm_mdionexus_softc *sc;

				sc = device_get_softc(dev);

				return (MDIO_WRITEREG_MUX(device_get_parent(dev),
				sc->mux_id, phy, reg, val));
				}

				static __inline void
				get_addr_size_cells(phandle_t node, pcell_t addr_cells, pcell_t size_cells)
				{

				*addr_cells = 2;
				/* Find address cells if present */
				OF_getencprop(node, "#address-cells", addr_cells, sizeof(*addr_cells));

				*size_cells = 2;
				/* Find size cells if present */
				OF_getencprop(node, "#size-cells", size_cells, sizeof(*size_cells));
				}

				static int
				brcm_mdionexus_fdt_probe(device_t dev)
				{

				if (!ofw_bus_status_okay(dev))
				return (ENXIO);
				device_set_desc(dev, "Broadcom MDIO nexus");
				return (BUS_PROBE_SPECIFIC);
				}

				static int
				brcm_mdionexus_fdt_attach(device_t dev)
				{
				struct brcm_mdionexus_softc *sc;
				int err;
				pcell_t addr_cells, size_cells, buf[2];
				phandle_t node;

				sc = device_get_softc(dev);

				node = ofw_bus_get_node(dev);
				get_addr_size_cells(node, &addr_cells, &size_cells);
				if ((addr_cells != 1) \|\| (size_cells != 0)) {
				device_printf(dev, "Only addr_cells=1 and size_cells=0 are supported\n");
				return (EINVAL);
				}

				if (OF_getencprop(node, "reg", buf, sizeof(pcell_t)) < 0)
				return (ENXIO);

				sc->mux_id = buf[0];

				err = brcm_mdionexus_ofw_bus_attach(dev);
				if (err != 0)
				return (err);

				return (bus_generic_attach(dev));
				}

				static const struct ofw_bus_devinfo *
				brcm_mdionexus_ofw_get_devinfo(device_t bus __unused, device_t child)
				{
				struct brcm_mdionexus_ofw_devinfo *di;

				di = device_get_ivars(child);
				return (&di->di_dinfo);
				}

				static int
				brcm_mdionexus_ofw_bus_attach(device_t dev)
				{
				struct simplebus_softc *sc;
				struct brcm_mdionexus_ofw_devinfo *di;
				device_t child;
				phandle_t parent, node;

				parent = ofw_bus_get_node(dev);
				simplebus_init(dev, parent);

				sc = (struct simplebus_softc *)device_get_softc(dev);

				/* Iterate through all bus subordinates */
				for (node = OF_child(parent); node > 0; node = OF_peer(node)) {
				/* Allocate and populate devinfo. */
				di = malloc(sizeof(*di), M_BRCM_IPROC_NEXUS, M_WAITOK \| M_ZERO);
				if (ofw_bus_gen_setup_devinfo(&di->di_dinfo, node) != 0) {
				free(di, M_BRCM_IPROC_NEXUS);
				continue;
				}

				/* Initialize and populate resource list. */
				resource_list_init(&di->di_rl);
				ofw_bus_reg_to_rl(dev, node, sc->acells, sc->scells,
				&di->di_rl);
				ofw_bus_intr_to_rl(dev, node, &di->di_rl, NULL);

				/* Add newbus device for this FDT node */
				child = device_add_child(dev, NULL, -1);
				if (child == NULL) {
				resource_list_free(&di->di_rl);
				ofw_bus_gen_destroy_devinfo(&di->di_dinfo);
				free(di, M_BRCM_IPROC_NEXUS);
				continue;
				}

				device_set_ivars(child, di);
				}

				return (0);
				}