36c1a37655
Obtained from: Semihalf Authored by: Kornel Duleba <mindal@semihalf.com> Approved by: wma Differential Revision: https://reviews.freebsd.org/D21335
235 lines
6.6 KiB
C
235 lines
6.6 KiB
C
/*-
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* Copyright (c) 2019 Juniper Networks, Inc.
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* Copyright (c) 2019 Semihalf.
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* All rights reserved.
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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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/rman.h>
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#include <sys/systm.h>
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#include <dev/fdt/simplebus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/ofw/ofw_bus.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include "mdio_if.h"
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MALLOC_DEFINE(M_BRCM_IPROC_NEXUS, "Broadcom IPROC MDIO NEXUS",
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"Broadcom IPROC MDIO NEXUS dynamic memory");
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struct brcm_mdionexus_softc {
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struct simplebus_softc simplebus_sc;
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uint32_t mux_id;
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};
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/* OFW bus interface */
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struct brcm_mdionexus_ofw_devinfo {
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struct ofw_bus_devinfo di_dinfo;
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struct resource_list di_rl;
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};
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static device_probe_t brcm_mdionexus_fdt_probe;
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static device_attach_t brcm_mdionexus_fdt_attach;
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static const struct ofw_bus_devinfo * brcm_mdionexus_ofw_get_devinfo(device_t,
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device_t);
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static int brcm_mdionexus_mdio_readreg(device_t, int, int);
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static int brcm_mdionexus_mdio_writereg(device_t, int, int, int);
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static device_method_t brcm_mdionexus_fdt_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, brcm_mdionexus_fdt_probe),
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DEVMETHOD(device_attach, brcm_mdionexus_fdt_attach),
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/* Bus interface */
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DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
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DEVMETHOD(bus_release_resource, bus_generic_release_resource),
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DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
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/* ofw_bus interface */
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DEVMETHOD(ofw_bus_get_devinfo, brcm_mdionexus_ofw_get_devinfo),
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DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
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DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
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DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
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DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
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DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
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/* MDIO interface */
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/* MDIO interface */
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DEVMETHOD(mdio_readreg, brcm_mdionexus_mdio_readreg),
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DEVMETHOD(mdio_writereg, brcm_mdionexus_mdio_writereg),
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DEVMETHOD_END
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};
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DEFINE_CLASS_0(brcm_mdionexus, brcm_mdionexus_fdt_driver, brcm_mdionexus_fdt_methods,
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sizeof(struct brcm_mdionexus_softc));
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static devclass_t brcm_mdionexus_fdt_devclass;
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static driver_t brcm_mdionexus_driver = {
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"brcm_mdionexus",
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brcm_mdionexus_fdt_methods,
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sizeof(struct brcm_mdionexus_softc)
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};
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EARLY_DRIVER_MODULE(brcm_mdionexus, brcm_iproc_mdio, brcm_mdionexus_driver,
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brcm_mdionexus_fdt_devclass, NULL, NULL, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
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static int brcm_mdionexus_ofw_bus_attach(device_t);
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static int
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brcm_mdionexus_mdio_readreg(device_t dev, int phy, int reg)
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{
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struct brcm_mdionexus_softc *sc;
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sc = device_get_softc(dev);
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return (MDIO_READREG_MUX(device_get_parent(dev),
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sc->mux_id, phy, reg));
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}
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static int
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brcm_mdionexus_mdio_writereg(device_t dev, int phy, int reg, int val)
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{
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struct brcm_mdionexus_softc *sc;
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sc = device_get_softc(dev);
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return (MDIO_WRITEREG_MUX(device_get_parent(dev),
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sc->mux_id, phy, reg, val));
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}
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static __inline void
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get_addr_size_cells(phandle_t node, pcell_t *addr_cells, pcell_t *size_cells)
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{
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*addr_cells = 2;
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/* Find address cells if present */
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OF_getencprop(node, "#address-cells", addr_cells, sizeof(*addr_cells));
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*size_cells = 2;
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/* Find size cells if present */
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OF_getencprop(node, "#size-cells", size_cells, sizeof(*size_cells));
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}
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static int
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brcm_mdionexus_fdt_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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device_set_desc(dev, "Broadcom MDIO nexus");
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return (BUS_PROBE_SPECIFIC);
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}
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static int
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brcm_mdionexus_fdt_attach(device_t dev)
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{
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struct brcm_mdionexus_softc *sc;
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int err;
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pcell_t addr_cells, size_cells, buf[2];
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phandle_t node;
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sc = device_get_softc(dev);
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node = ofw_bus_get_node(dev);
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get_addr_size_cells(node, &addr_cells, &size_cells);
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if ((addr_cells != 1) || (size_cells != 0)) {
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device_printf(dev, "Only addr_cells=1 and size_cells=0 are supported\n");
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return (EINVAL);
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}
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if (OF_getencprop(node, "reg", buf, sizeof(pcell_t)) < 0)
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return (ENXIO);
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sc->mux_id = buf[0];
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err = brcm_mdionexus_ofw_bus_attach(dev);
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if (err != 0)
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return (err);
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return (bus_generic_attach(dev));
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}
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static const struct ofw_bus_devinfo *
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brcm_mdionexus_ofw_get_devinfo(device_t bus __unused, device_t child)
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{
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struct brcm_mdionexus_ofw_devinfo *di;
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di = device_get_ivars(child);
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return (&di->di_dinfo);
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}
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static int
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brcm_mdionexus_ofw_bus_attach(device_t dev)
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{
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struct simplebus_softc *sc;
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struct brcm_mdionexus_ofw_devinfo *di;
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device_t child;
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phandle_t parent, node;
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parent = ofw_bus_get_node(dev);
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simplebus_init(dev, parent);
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sc = (struct simplebus_softc *)device_get_softc(dev);
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/* Iterate through all bus subordinates */
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for (node = OF_child(parent); node > 0; node = OF_peer(node)) {
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/* Allocate and populate devinfo. */
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di = malloc(sizeof(*di), M_BRCM_IPROC_NEXUS, M_WAITOK | M_ZERO);
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if (ofw_bus_gen_setup_devinfo(&di->di_dinfo, node) != 0) {
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free(di, M_BRCM_IPROC_NEXUS);
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continue;
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}
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/* Initialize and populate resource list. */
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resource_list_init(&di->di_rl);
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ofw_bus_reg_to_rl(dev, node, sc->acells, sc->scells,
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&di->di_rl);
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ofw_bus_intr_to_rl(dev, node, &di->di_rl, NULL);
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/* Add newbus device for this FDT node */
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child = device_add_child(dev, NULL, -1);
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if (child == NULL) {
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resource_list_free(&di->di_rl);
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ofw_bus_gen_destroy_devinfo(&di->di_dinfo);
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free(di, M_BRCM_IPROC_NEXUS);
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continue;
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}
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device_set_ivars(child, di);
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}
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return (0);
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}
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