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: stable/10/sys/dev/etherswitch/mdio.c 234861 2012-05-01 06:11:38Z adrian $
27 */
28
29 #include <sys/param.h>
30 #include <sys/bus.h>
31 #include <sys/systm.h>
32
33 #include <dev/etherswitch/mdio.h>
34
35 #include "mdio_if.h"
36
37 static void
mdio_identify(driver_t * driver,device_t parent)38 mdio_identify(driver_t *driver, device_t parent)
39 {
40
41 if (device_find_child(parent, mdio_driver.name, -1) == NULL)
42 BUS_ADD_CHILD(parent, 0, mdio_driver.name, -1);
43 }
44
45 static int
mdio_probe(device_t dev)46 mdio_probe(device_t dev)
47 {
48
49 device_set_desc(dev, "MDIO");
50
51 return (BUS_PROBE_SPECIFIC);
52 }
53
54 static int
mdio_attach(device_t dev)55 mdio_attach(device_t dev)
56 {
57
58 bus_generic_probe(dev);
59 bus_enumerate_hinted_children(dev);
60 return (bus_generic_attach(dev));
61 }
62
63 static int
mdio_detach(device_t dev)64 mdio_detach(device_t dev)
65 {
66
67 bus_generic_detach(dev);
68 return (0);
69 }
70
71 static int
mdio_readreg(device_t dev,int phy,int reg)72 mdio_readreg(device_t dev, int phy, int reg)
73 {
74
75 return (MDIO_READREG(device_get_parent(dev), phy, reg));
76 }
77
78 static int
mdio_writereg(device_t dev,int phy,int reg,int val)79 mdio_writereg(device_t dev, int phy, int reg, int val)
80 {
81
82 return (MDIO_WRITEREG(device_get_parent(dev), phy, reg, val));
83 }
84
85 static void
mdio_hinted_child(device_t dev,const char * name,int unit)86 mdio_hinted_child(device_t dev, const char *name, int unit)
87 {
88
89 device_add_child(dev, name, unit);
90 }
91
92 static device_method_t mdio_methods[] = {
93 /* device interface */
94 DEVMETHOD(device_identify, mdio_identify),
95 DEVMETHOD(device_probe, mdio_probe),
96 DEVMETHOD(device_attach, mdio_attach),
97 DEVMETHOD(device_detach, mdio_detach),
98 DEVMETHOD(device_shutdown, bus_generic_shutdown),
99
100 /* bus interface */
101 DEVMETHOD(bus_add_child, device_add_child_ordered),
102 DEVMETHOD(bus_hinted_child, mdio_hinted_child),
103
104 /* MDIO access */
105 DEVMETHOD(mdio_readreg, mdio_readreg),
106 DEVMETHOD(mdio_writereg, mdio_writereg),
107
108 DEVMETHOD_END
109 };
110
111 driver_t mdio_driver = {
112 "mdio",
113 mdio_methods,
114 0
115 };
116
117 devclass_t mdio_devclass;
118