aw_if_dwc.c revision 295711 
1/*-
2 * Copyright (c) 2015 Luiz Otavio O Souza <loos@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/arm/allwinner/a20/a20_if_dwc.c 295711 2016-02-17 18:28:03Z andrew $");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/bus.h>
33#include <sys/kernel.h>
34#include <sys/module.h>
35
36#include <machine/bus.h>
37
38#include <dev/dwc/if_dwc.h>
39#include <dev/dwc/if_dwcvar.h>
40#include <dev/ofw/ofw_bus.h>
41#include <dev/ofw/ofw_bus_subr.h>
42
43#include <arm/allwinner/a10_clk.h>
44
45#include "if_dwc_if.h"
46
47static int
48a20_if_dwc_probe(device_t dev)
49{
50
51	if (!ofw_bus_status_okay(dev))
52		return (ENXIO);
53	if (!ofw_bus_is_compatible(dev, "allwinner,sun7i-a20-gmac"))
54		return (ENXIO);
55	device_set_desc(dev, "A20 Gigabit Ethernet Controller");
56
57	return (BUS_PROBE_DEFAULT);
58}
59
60static int
61a20_if_dwc_init(device_t dev)
62{
63
64	/* Activate GMAC clock and set the pin mux to rgmii. */
65	if (a10_clk_gmac_activate(ofw_bus_get_node(dev)) != 0) {
66		device_printf(dev, "could not activate gmac module\n");
67		return (ENXIO);
68	}
69
70	return (0);
71}
72
73static int
74a20_if_dwc_mac_type(device_t dev)
75{
76
77	return (DWC_GMAC_ALT_DESC);
78}
79
80static int
81a20_if_dwc_mii_clk(device_t dev)
82{
83
84	return (GMAC_MII_CLK_150_250M_DIV102);
85}
86
87static device_method_t a20_dwc_methods[] = {
88	DEVMETHOD(device_probe,		a20_if_dwc_probe),
89
90	DEVMETHOD(if_dwc_init,		a20_if_dwc_init),
91	DEVMETHOD(if_dwc_mac_type,	a20_if_dwc_mac_type),
92	DEVMETHOD(if_dwc_mii_clk,	a20_if_dwc_mii_clk),
93
94	DEVMETHOD_END
95};
96
97static devclass_t a20_dwc_devclass;
98
99extern driver_t dwc_driver;
100
101DEFINE_CLASS_1(dwc, a20_dwc_driver, a20_dwc_methods, sizeof(struct dwc_softc),
102    dwc_driver);
103DRIVER_MODULE(a20_dwc, simplebus, a20_dwc_driver, a20_dwc_devclass, 0, 0);
104
105MODULE_DEPEND(a20_dwc, dwc, 1, 1, 1);
106