FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/inphy.c
1 /*-
2 * Copyright (c) 2001 Jonathan Lemon
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 * 3. Neither the name of the author nor the names of any co-contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 */
30
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD: releng/8.4/sys/dev/mii/inphy.c 225492 2011-09-11 20:38:33Z marius $");
33
34 /*
35 * driver for Intel 82553 and 82555 PHYs
36 */
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/kernel.h>
41 #include <sys/module.h>
42 #include <sys/socket.h>
43 #include <sys/bus.h>
44
45 #include <net/if.h>
46 #include <net/if_media.h>
47
48 #include <dev/mii/mii.h>
49 #include <dev/mii/miivar.h>
50 #include "miidevs.h"
51
52 #include <dev/mii/inphyreg.h>
53
54 #include "miibus_if.h"
55
56 static int inphy_probe(device_t dev);
57 static int inphy_attach(device_t dev);
58
59 static device_method_t inphy_methods[] = {
60 /* device interface */
61 DEVMETHOD(device_probe, inphy_probe),
62 DEVMETHOD(device_attach, inphy_attach),
63 DEVMETHOD(device_detach, mii_phy_detach),
64 DEVMETHOD(device_shutdown, bus_generic_shutdown),
65 { 0, 0 }
66 };
67
68 static devclass_t inphy_devclass;
69
70 static driver_t inphy_driver = {
71 "inphy",
72 inphy_methods,
73 sizeof(struct mii_softc)
74 };
75
76 DRIVER_MODULE(inphy, miibus, inphy_driver, inphy_devclass, 0, 0);
77
78 static int inphy_service(struct mii_softc *, struct mii_data *, int);
79 static void inphy_status(struct mii_softc *);
80 static void inphy_reset(struct mii_softc *);
81
82 static const struct mii_phydesc inphys[] = {
83 MII_PHY_DESC(INTEL, I82553C),
84 MII_PHY_DESC(INTEL, I82555),
85 MII_PHY_DESC(INTEL, I82562EM),
86 MII_PHY_DESC(INTEL, I82562ET),
87 MII_PHY_DESC(xxINTEL, I82553AB),
88 MII_PHY_END
89 };
90
91 static int
92 inphy_probe(device_t dev)
93 {
94
95 return (mii_phy_dev_probe(dev, inphys, BUS_PROBE_DEFAULT));
96 }
97
98 static int
99 inphy_attach(device_t dev)
100 {
101 struct mii_softc *sc;
102 struct mii_attach_args *ma;
103 struct mii_data *mii;
104
105 sc = device_get_softc(dev);
106 ma = device_get_ivars(dev);
107 sc->mii_dev = device_get_parent(dev);
108 mii = ma->mii_data;
109 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
110
111 sc->mii_flags = miibus_get_flags(dev);
112 sc->mii_inst = mii->mii_instance++;
113 sc->mii_phy = ma->mii_phyno;
114 sc->mii_service = inphy_service;
115 sc->mii_pdata = mii;
116
117 sc->mii_flags |= MIIF_NOMANPAUSE | MIIF_NOMANPAUSE;
118
119 ifmedia_add(&mii->mii_media,
120 IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
121 MII_MEDIA_100_TX, NULL);
122
123 inphy_reset(sc);
124
125 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
126 device_printf(dev, " ");
127 mii_phy_add_media(sc);
128 printf("\n");
129
130 MIIBUS_MEDIAINIT(sc->mii_dev);
131
132 return (0);
133 }
134
135 static int
136 inphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
137 {
138
139 switch (cmd) {
140 case MII_POLLSTAT:
141 break;
142
143 case MII_MEDIACHG:
144 /*
145 * If the interface is not up, don't do anything.
146 */
147 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
148 break;
149
150 mii_phy_setmedia(sc);
151 break;
152
153 case MII_TICK:
154 if (mii_phy_tick(sc) == EJUSTRETURN)
155 return (0);
156 break;
157 }
158
159 /* Update the media status. */
160 inphy_status(sc);
161
162 /* Callback if something changed. */
163 mii_phy_update(sc, cmd);
164 return (0);
165 }
166
167 static void
168 inphy_status(struct mii_softc *sc)
169 {
170 struct mii_data *mii = sc->mii_pdata;
171 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
172 int bmsr, bmcr, scr;
173
174 mii->mii_media_status = IFM_AVALID;
175 mii->mii_media_active = IFM_ETHER;
176
177 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
178 if (bmsr & BMSR_LINK)
179 mii->mii_media_status |= IFM_ACTIVE;
180
181 bmcr = PHY_READ(sc, MII_BMCR);
182 if (bmcr & BMCR_ISO) {
183 mii->mii_media_active |= IFM_NONE;
184 mii->mii_media_status = 0;
185 return;
186 }
187
188 if (bmcr & BMCR_LOOP)
189 mii->mii_media_active |= IFM_LOOP;
190
191 if (bmcr & BMCR_AUTOEN) {
192 if ((bmsr & BMSR_ACOMP) == 0) {
193 mii->mii_media_active |= IFM_NONE;
194 return;
195 }
196
197 scr = PHY_READ(sc, MII_INPHY_SCR);
198 if (scr & SCR_S100)
199 mii->mii_media_active |= IFM_100_TX;
200 else
201 mii->mii_media_active |= IFM_10_T;
202 if (scr & SCR_FDX)
203 mii->mii_media_active |=
204 IFM_FDX | mii_phy_flowstatus(sc);
205 else
206 mii->mii_media_active |= IFM_HDX;
207 } else
208 mii->mii_media_active = ife->ifm_media;
209 }
210
211 static void
212 inphy_reset(struct mii_softc *sc)
213 {
214
215 mii_phy_reset(sc);
216
217 /* Ensure Bay flow control is disabled. */
218 PHY_WRITE(sc, MII_INPHY_SCR,
219 PHY_READ(sc, MII_INPHY_SCR) & ~SCR_FLOWCTL);
220 }
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