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/*-
* Copyright (c) 2015 Luiz Otavio O Souza <loos@FreeBSD.org>
* 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 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 <machine/bus.h>
#include <dev/dwc/if_dwc.h>
#include <dev/dwc/if_dwcvar.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <arm/allwinner/allwinner_machdep.h>
#include <dev/extres/clk/clk.h>
#include <dev/extres/regulator/regulator.h>
#include "if_dwc_if.h"
static int
a20_if_dwc_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_is_compatible(dev, "allwinner,sun7i-a20-gmac"))
return (ENXIO);
device_set_desc(dev, "A20 Gigabit Ethernet Controller");
return (BUS_PROBE_DEFAULT);
}
static int
a20_if_dwc_init(device_t dev)
{
const char *tx_parent_name;
char *phy_type;
clk_t clk_tx, clk_tx_parent;
regulator_t reg;
phandle_t node;
int error;
node = ofw_bus_get_node(dev);
/* Configure PHY for MII or RGMII mode */
if (OF_getprop_alloc(node, "phy-mode", 1, (void **)&phy_type)) {
error = clk_get_by_ofw_name(dev, "allwinner_gmac_tx", &clk_tx);
if (error != 0) {
device_printf(dev, "could not get tx clk\n");
return (error);
}
if (strcmp(phy_type, "rgmii") == 0)
tx_parent_name = "gmac_int_tx";
else
tx_parent_name = "mii_phy_tx";
error = clk_get_by_name(dev, tx_parent_name, &clk_tx_parent);
if (error != 0) {
device_printf(dev, "could not get clock '%s'\n",
tx_parent_name);
return (error);
}
error = clk_set_parent_by_clk(clk_tx, clk_tx_parent);
if (error != 0) {
device_printf(dev, "could not set tx clk parent\n");
return (error);
}
}
/* Enable PHY regulator if applicable */
if (regulator_get_by_ofw_property(dev, "phy-supply", ®) == 0) {
error = regulator_enable(reg);
if (error != 0) {
device_printf(dev, "could not enable PHY regulator\n");
return (error);
}
}
return (0);
}
static int
a20_if_dwc_mac_type(device_t dev)
{
return (DWC_GMAC_ALT_DESC);
}
static int
a20_if_dwc_mii_clk(device_t dev)
{
return (GMAC_MII_CLK_150_250M_DIV102);
}
static device_method_t a20_dwc_methods[] = {
DEVMETHOD(device_probe, a20_if_dwc_probe),
DEVMETHOD(if_dwc_init, a20_if_dwc_init),
DEVMETHOD(if_dwc_mac_type, a20_if_dwc_mac_type),
DEVMETHOD(if_dwc_mii_clk, a20_if_dwc_mii_clk),
DEVMETHOD_END
};
static devclass_t a20_dwc_devclass;
extern driver_t dwc_driver;
DEFINE_CLASS_1(dwc, a20_dwc_driver, a20_dwc_methods, sizeof(struct dwc_softc),
dwc_driver);
DRIVER_MODULE(a20_dwc, simplebus, a20_dwc_driver, a20_dwc_devclass, 0, 0);
MODULE_DEPEND(a20_dwc, dwc, 1, 1, 1);
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