1/*-
2 * Copyright (c) 2011-2012 Stefan Bethke.
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 * $FreeBSD$
27 */
28
29#include <sys/param.h>
30#include <sys/bus.h>
31#include <sys/systm.h>
32#include <sys/module.h>
33
34#include <dev/mdio/mdio.h>
35
36#include "mdio_if.h"
37
38static void
39mdio_identify(driver_t *driver, device_t parent)
40{
41
42	if (device_find_child(parent, mdio_driver.name, -1) == NULL)
43		BUS_ADD_CHILD(parent, 0, mdio_driver.name, -1);
44}
45
46static int
47mdio_probe(device_t dev)
48{
49
50	device_set_desc(dev, "MDIO");
51
52	return (BUS_PROBE_SPECIFIC);
53}
54
55static int
56mdio_attach(device_t dev)
57{
58
59	bus_generic_probe(dev);
60	bus_enumerate_hinted_children(dev);
61	return (bus_generic_attach(dev));
62}
63
64static int
65mdio_detach(device_t dev)
66{
67
68	bus_generic_detach(dev);
69	return (0);
70}
71
72static int
73mdio_readreg(device_t dev, int phy, int reg)
74{
75
76	return (MDIO_READREG(device_get_parent(dev), phy, reg));
77}
78
79static int
80mdio_writereg(device_t dev, int phy, int reg, int val)
81{
82
83	return (MDIO_WRITEREG(device_get_parent(dev), phy, reg, val));
84}
85
86static int
87mdio_readextreg(device_t dev, int phy, int devad, int reg)
88{
89
90	return (MDIO_READEXTREG(device_get_parent(dev), phy, devad, reg));
91}
92
93static int
94mdio_writeextreg(device_t dev, int phy, int devad, int reg,
95    int val)
96{
97
98	return (MDIO_WRITEEXTREG(device_get_parent(dev), phy, devad, reg, val));
99}
100
101static void
102mdio_hinted_child(device_t dev, const char *name, int unit)
103{
104
105	device_add_child(dev, name, unit);
106}
107
108static device_method_t mdio_methods[] = {
109	/* device interface */
110	DEVMETHOD(device_identify,	mdio_identify),
111	DEVMETHOD(device_probe,		mdio_probe),
112	DEVMETHOD(device_attach,	mdio_attach),
113	DEVMETHOD(device_detach,	mdio_detach),
114	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
115
116	/* bus interface */
117	DEVMETHOD(bus_add_child,	device_add_child_ordered),
118	DEVMETHOD(bus_hinted_child,	mdio_hinted_child),
119
120	/* MDIO access */
121	DEVMETHOD(mdio_readreg,		mdio_readreg),
122	DEVMETHOD(mdio_writereg,	mdio_writereg),
123	DEVMETHOD(mdio_readextreg,	mdio_readextreg),
124	DEVMETHOD(mdio_writeextreg,	mdio_writeextreg),
125
126	DEVMETHOD_END
127};
128
129driver_t mdio_driver = {
130	"mdio",
131	mdio_methods,
132	0
133};
134
135devclass_t mdio_devclass;
136
137MODULE_VERSION(mdio, 1);
138