freebsd-dev/sys/arm/allwinner/aw_if_dwc.c
Michal Meloun dac935533b EXTRES: Add OF node as argument to all <foo>_get_by_ofw_<bar>() functions.
In some cases, the driver must handle given properties located in
specific OF subnode. Instead of creating duplicate set of function, add
'node' as argument to existing functions, defaulting it to device OF node.

MFC after: 3 weeks
2016-07-10 18:28:15 +00:00

146 lines
3.9 KiB
C

/*-
* 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, 0, "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, 0, "phy-supply", &reg) == 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);