1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2001 Jonathan Lemon
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the author nor the names of any co-contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
35
36 /*
37 * driver for Intel 82553 and 82555 PHYs
38 */
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/kernel.h>
43 #include <sys/module.h>
44 #include <sys/socket.h>
45 #include <sys/bus.h>
46
47 #include <net/if.h>
48 #include <net/if_var.h>
49 #include <net/if_media.h>
50
51 #include <dev/mii/mii.h>
52 #include <dev/mii/miivar.h>
53 #include "miidevs.h"
54
55 #include <dev/fxp/inphyreg.h>
56
57 #include "miibus_if.h"
58
59 static int inphy_probe(device_t dev);
60 static int inphy_attach(device_t dev);
61
62 static device_method_t inphy_methods[] = {
63 /* device interface */
64 DEVMETHOD(device_probe, inphy_probe),
65 DEVMETHOD(device_attach, inphy_attach),
66 DEVMETHOD(device_detach, mii_phy_detach),
67 DEVMETHOD(device_shutdown, bus_generic_shutdown),
68 { 0, 0 }
69 };
70
71 static devclass_t inphy_devclass;
72
73 static driver_t inphy_driver = {
74 "inphy",
75 inphy_methods,
76 sizeof(struct mii_softc)
77 };
78
79 DRIVER_MODULE(inphy, miibus, inphy_driver, inphy_devclass, 0, 0);
80
81 static int inphy_service(struct mii_softc *, struct mii_data *, int);
82 static void inphy_status(struct mii_softc *);
83 static void inphy_reset(struct mii_softc *);
84
85 static const struct mii_phydesc inphys[] = {
86 MII_PHY_DESC(xxINTEL, I82553),
87 MII_PHY_DESC(yyINTEL, I82553),
88 MII_PHY_DESC(yyINTEL, I82555),
89 MII_PHY_DESC(yyINTEL, I82562EM),
90 MII_PHY_DESC(yyINTEL, I82562ET),
91 MII_PHY_END
92 };
93
94 static const struct mii_phy_funcs inphy_funcs = {
95 inphy_service,
96 inphy_status,
97 inphy_reset
98 };
99
100 static int
inphy_probe(device_t dev)101 inphy_probe(device_t dev)
102 {
103
104 return (mii_phy_dev_probe(dev, inphys, BUS_PROBE_DEFAULT));
105 }
106
107 static int
inphy_attach(device_t dev)108 inphy_attach(device_t dev)
109 {
110
111 mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &inphy_funcs, 1);
112 return (0);
113 }
114
115 static int
inphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)116 inphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
117 {
118
119 switch (cmd) {
120 case MII_POLLSTAT:
121 break;
122
123 case MII_MEDIACHG:
124 /*
125 * If the interface is not up, don't do anything.
126 */
127 if ((if_getflags(mii->mii_ifp) & IFF_UP) == 0)
128 break;
129
130 mii_phy_setmedia(sc);
131 break;
132
133 case MII_TICK:
134 if (mii_phy_tick(sc) == EJUSTRETURN)
135 return (0);
136 break;
137 }
138
139 /* Update the media status. */
140 PHY_STATUS(sc);
141
142 /* Callback if something changed. */
143 mii_phy_update(sc, cmd);
144 return (0);
145 }
146
147 static void
inphy_status(struct mii_softc * sc)148 inphy_status(struct mii_softc *sc)
149 {
150 struct mii_data *mii = sc->mii_pdata;
151 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
152 int bmsr, bmcr, scr;
153
154 mii->mii_media_status = IFM_AVALID;
155 mii->mii_media_active = IFM_ETHER;
156
157 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
158 if (bmsr & BMSR_LINK)
159 mii->mii_media_status |= IFM_ACTIVE;
160
161 bmcr = PHY_READ(sc, MII_BMCR);
162 if (bmcr & BMCR_ISO) {
163 mii->mii_media_active |= IFM_NONE;
164 mii->mii_media_status = 0;
165 return;
166 }
167
168 if (bmcr & BMCR_LOOP)
169 mii->mii_media_active |= IFM_LOOP;
170
171 if (bmcr & BMCR_AUTOEN) {
172 if ((bmsr & BMSR_ACOMP) == 0) {
173 mii->mii_media_active |= IFM_NONE;
174 return;
175 }
176
177 scr = PHY_READ(sc, MII_INPHY_SCR);
178 if (scr & SCR_S100)
179 mii->mii_media_active |= IFM_100_TX;
180 else
181 mii->mii_media_active |= IFM_10_T;
182 if (scr & SCR_FDX)
183 mii->mii_media_active |=
184 IFM_FDX | mii_phy_flowstatus(sc);
185 else
186 mii->mii_media_active |= IFM_HDX;
187 } else
188 mii->mii_media_active = ife->ifm_media;
189 }
190
191 static void
inphy_reset(struct mii_softc * sc)192 inphy_reset(struct mii_softc *sc)
193 {
194
195 mii_phy_reset(sc);
196
197 /* Ensure Bay flow control is disabled. */
198 PHY_WRITE(sc, MII_INPHY_SCR,
199 PHY_READ(sc, MII_INPHY_SCR) & ~SCR_FLOWCTL);
200 }
201