Add the A20 glue code for if_dwc.

This code initializes the GMAC clock and sets the pin mux to rgmii.

It also override the if_dwc defaults to set the alternate descriptor type
and MII clock used on A20.

Tested on cubieboard2 and banana pi.

sys/arm/allwinner/a20/a20_if_dwc.c

@@ -0,0 +1,107 @@
+/*-
+ * 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/a10_clk.h>
+#include <arm/allwinner/a10_gpio.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)
+{
+
+	/* Activate GMAC clock and set the pin mux to rgmii. */
+	if (a10_clk_gmac_activate(ofw_bus_get_node(dev)) != 0 ||
+	    a10_gpio_ethernet_activate(A10_GPIO_FUNC_RGMII)) {
+		device_printf(dev, "could not activate gmac module\n");
+		return (ENXIO);
+	}
+
+	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);

sys/arm/allwinner/a20/files.a20

@@ -1,3 +1,4 @@
 # $FreeBSD$
 
 arm/allwinner/a20/a20_mp.c		optional	smp
+arm/allwinner/a20/a20_if_dwc.c		optional	dwc