/*-
* Copyright (c) 2015 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Semihalf under
* the sponsorship of 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, 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 <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/fdt/simplebus.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include "thunder_mdio_var.h"
static int thunder_mdio_fdt_probe(device_t);
static int thunder_mdio_fdt_attach(device_t);
static device_method_t thunder_mdio_fdt_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, thunder_mdio_fdt_probe),
DEVMETHOD(device_attach, thunder_mdio_fdt_attach),
/* End */
DEVMETHOD_END
};
DEFINE_CLASS_1(thunder_mdio, thunder_mdio_fdt_driver, thunder_mdio_fdt_methods,
sizeof(struct thunder_mdio_softc), thunder_mdio_driver);
static devclass_t thunder_mdio_fdt_devclass;
EARLY_DRIVER_MODULE(thunder_mdio, ofwbus, thunder_mdio_fdt_driver,
thunder_mdio_fdt_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
EARLY_DRIVER_MODULE(thunder_mdio, mdionexus, thunder_mdio_fdt_driver,
thunder_mdio_fdt_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
static struct ofw_compat_data mdio_compat_data[] = {
{"cavium,octeon-3860-mdio", true},
{"cavium,thunder-8890-mdio", true},
{NULL, false}
};
static int
thunder_mdio_fdt_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_search_compatible(dev, mdio_compat_data)->ocd_data)
return (ENXIO);
device_set_desc(dev, THUNDER_MDIO_DEVSTR);
return (BUS_PROBE_DEFAULT);
}
static int
thunder_mdio_fdt_attach(device_t dev)
{
phandle_t node;
int ret;
/* Call core attach */
ret = thunder_mdio_attach(dev);
if (ret != 0)
return (ret);
/*
* Register device to this node/xref.
* Thanks to that we will be able to retrieve device_t structure
* while holding only node reference acquired from FDT.
*/
node = ofw_bus_get_node(dev);
OF_device_register_xref(OF_xref_from_node(node), dev);
return (0);
}
struct mdionexus_softc {
struct simplebus_softc simplebus_sc;
};
static device_probe_t mdionexus_fdt_probe;
static device_attach_t mdionexus_fdt_attach;
static const struct ofw_bus_devinfo * mdionexus_ofw_get_devinfo(device_t,
device_t);
static device_method_t mdionexus_fdt_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, mdionexus_fdt_probe),
DEVMETHOD(device_attach, 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, 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),
DEVMETHOD_END
};
DEFINE_CLASS_0(mdionexus, mdionexus_fdt_driver, mdionexus_fdt_methods,
sizeof(struct mdionexus_softc));
static devclass_t mdionexus_fdt_devclass;
EARLY_DRIVER_MODULE(mdionexus, mrmlbus, mdionexus_fdt_driver,
mdionexus_fdt_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
static int mdionexus_ofw_fill_ranges(phandle_t, struct simplebus_softc *);
static int mdionexus_ofw_bus_attach(device_t);
static int
mdionexus_fdt_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_is_compatible(dev, "cavium,thunder-8890-mdio-nexus"))
return (ENXIO);
device_set_desc(dev, "Cavium ThunderX MDIO nexus");
return (BUS_PROBE_SPECIFIC);
}
static int
mdionexus_fdt_attach(device_t dev)
{
int err;
err = mdionexus_ofw_bus_attach(dev);
if (err != 0)
return (err);
return (bus_generic_attach(dev));
}
/* OFW bus interface */
struct mdionexus_ofw_devinfo {
struct ofw_bus_devinfo di_dinfo;
struct resource_list di_rl;
};
static const struct ofw_bus_devinfo *
mdionexus_ofw_get_devinfo(device_t bus __unused, device_t child)
{
struct mdionexus_ofw_devinfo *di;
di = device_get_ivars(child);
return (&di->di_dinfo);
}
/* Helper functions */
static int
mdionexus_ofw_fill_ranges(phandle_t node, struct simplebus_softc *sc)
{
int host_address_cells;
cell_t *base_ranges;
ssize_t nbase_ranges;
int err;
int i, j, k;
err = OF_searchencprop(OF_parent(node), "#address-cells",
&host_address_cells, sizeof(host_address_cells));
if (err <= 0)
return (-1);
nbase_ranges = OF_getproplen(node, "ranges");
if (nbase_ranges < 0)
return (-1);
sc->nranges = nbase_ranges / sizeof(cell_t) /
(sc->acells + host_address_cells + sc->scells);
if (sc->nranges == 0)
return (0);
sc->ranges = malloc(sc->nranges * sizeof(sc->ranges[0]),
M_THUNDER_MDIO, M_WAITOK);
base_ranges = malloc(nbase_ranges, M_THUNDER_MDIO, M_WAITOK);
OF_getencprop(node, "ranges", base_ranges, nbase_ranges);
for (i = 0, j = 0; i < sc->nranges; i++) {
sc->ranges[i].bus = 0;
for (k = 0; k < sc->acells; k++) {
sc->ranges[i].bus <<= 32;
sc->ranges[i].bus |= base_ranges[j++];
}
sc->ranges[i].host = 0;
for (k = 0; k < host_address_cells; k++) {
sc->ranges[i].host <<= 32;
sc->ranges[i].host |= base_ranges[j++];
}
sc->ranges[i].size = 0;
for (k = 0; k < sc->scells; k++) {
sc->ranges[i].size <<= 32;
sc->ranges[i].size |= base_ranges[j++];
}
}
free(base_ranges, M_THUNDER_MDIO);
return (sc->nranges);
}
static int
mdionexus_ofw_bus_attach(device_t dev)
{
struct simplebus_softc *sc;
struct 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);
if (mdionexus_ofw_fill_ranges(parent, sc) < 0) {
device_printf(dev, "could not get ranges\n");
return (ENXIO);
}
/* 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_THUNDER_MDIO, M_WAITOK | M_ZERO);
if (ofw_bus_gen_setup_devinfo(&di->di_dinfo, node) != 0) {
free(di, M_THUNDER_MDIO);
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_THUNDER_MDIO);
continue;
}
device_set_ivars(child, di);
}
return (0);
}
