1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2000,2001 Jonathan Chen.
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 * without modification, immediately at the beginning of the file.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
22 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #include <sys/cdefs.h>
32 /*
33 * Driver for the TDK 78Q2120 MII
34 *
35 * References:
36 * Datasheet for the 78Q2120 - http://www.tsc.tdk.com/lan/78q2120.pdf
37 * Most of this code stolen from ukphy.c
38 */
39
40 /*
41 * The TDK 78Q2120 is found on some Xircom X3201 based CardBus cards,
42 * also spotted on some 3C575 cards. It's just like any other normal
43 * phy, except it does auto negotiation in a different way.
44 */
45
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #include <sys/kernel.h>
49 #include <sys/socket.h>
50 #include <sys/errno.h>
51 #include <sys/module.h>
52 #include <sys/bus.h>
53
54 #include <net/if.h>
55 #include <net/if_media.h>
56
57 #include <dev/mii/mii.h>
58 #include <dev/mii/miivar.h>
59 #include "miidevs.h"
60
61 #include <dev/mii/tdkphyreg.h>
62
63 #include "miibus_if.h"
64
65 static int tdkphy_probe(device_t);
66 static int tdkphy_attach(device_t);
67
68 static device_method_t tdkphy_methods[] = {
69 /* device interface */
70 DEVMETHOD(device_probe, tdkphy_probe),
71 DEVMETHOD(device_attach, tdkphy_attach),
72 DEVMETHOD(device_detach, mii_phy_detach),
73 DEVMETHOD(device_shutdown, bus_generic_shutdown),
74 DEVMETHOD_END
75 };
76
77 static driver_t tdkphy_driver = {
78 "tdkphy",
79 tdkphy_methods,
80 sizeof(struct mii_softc)
81 };
82
83 DRIVER_MODULE(tdkphy, miibus, tdkphy_driver, 0, 0);
84
85 static int tdkphy_service(struct mii_softc *, struct mii_data *, int);
86 static void tdkphy_status(struct mii_softc *);
87
88 static const struct mii_phydesc tdkphys[] = {
89 MII_PHY_DESC(xxTSC, 78Q2120),
90 MII_PHY_END
91 };
92
93 static const struct mii_phy_funcs tdkphy_funcs = {
94 tdkphy_service,
95 tdkphy_status,
96 mii_phy_reset
97 };
98
99 static int
tdkphy_probe(device_t dev)100 tdkphy_probe(device_t dev)
101 {
102
103 return (mii_phy_dev_probe(dev, tdkphys, BUS_PROBE_DEFAULT));
104 }
105
106 static int
tdkphy_attach(device_t dev)107 tdkphy_attach(device_t dev)
108 {
109
110 mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &tdkphy_funcs, 1);
111 return (0);
112 }
113
114 static int
tdkphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)115 tdkphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
116 {
117
118 switch (cmd) {
119 case MII_POLLSTAT:
120 break;
121
122 case MII_MEDIACHG:
123 mii_phy_setmedia(sc);
124 break;
125
126 case MII_TICK:
127 if (mii_phy_tick(sc) == EJUSTRETURN)
128 return (0);
129 break;
130 }
131
132 /* Update the media status. */
133 PHY_STATUS(sc);
134 if (sc->mii_pdata->mii_media_active & IFM_FDX)
135 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) | BMCR_FDX);
136 else
137 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) & ~BMCR_FDX);
138
139 /* Callback if something changed. */
140 mii_phy_update(sc, cmd);
141 return (0);
142 }
143
144 static void
tdkphy_status(struct mii_softc * phy)145 tdkphy_status(struct mii_softc *phy)
146 {
147 struct mii_data *mii = phy->mii_pdata;
148 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
149 int bmsr, bmcr, anlpar, diag;
150
151 mii->mii_media_status = IFM_AVALID;
152 mii->mii_media_active = IFM_ETHER;
153
154 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
155 if (bmsr & BMSR_LINK)
156 mii->mii_media_status |= IFM_ACTIVE;
157
158 bmcr = PHY_READ(phy, MII_BMCR);
159 if (bmcr & BMCR_ISO) {
160 mii->mii_media_active |= IFM_NONE;
161 mii->mii_media_status = 0;
162 return;
163 }
164
165 if (bmcr & BMCR_LOOP)
166 mii->mii_media_active |= IFM_LOOP;
167
168 if (bmcr & BMCR_AUTOEN) {
169 /*
170 * NWay autonegotiation takes the highest-order common
171 * bit of the ANAR and ANLPAR (i.e. best media advertised
172 * both by us and our link partner).
173 */
174 if ((bmsr & BMSR_ACOMP) == 0) {
175 /* Erg, still trying, I guess... */
176 mii->mii_media_active |= IFM_NONE;
177 return;
178 }
179
180 anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR);
181 /*
182 * ANLPAR doesn't get set on my card, but we check it anyway,
183 * since it is mentioned in the 78Q2120 specs.
184 */
185 if (anlpar & ANLPAR_TX_FD)
186 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
187 else if (anlpar & ANLPAR_T4)
188 mii->mii_media_active |= IFM_100_T4|IFM_HDX;
189 else if (anlpar & ANLPAR_TX)
190 mii->mii_media_active |= IFM_100_TX|IFM_HDX;
191 else if (anlpar & ANLPAR_10_FD)
192 mii->mii_media_active |= IFM_10_T|IFM_FDX;
193 else if (anlpar & ANLPAR_10)
194 mii->mii_media_active |= IFM_10_T|IFM_HDX;
195 else {
196 /*
197 * ANLPAR isn't set, which leaves two possibilities:
198 * 1) Auto negotiation failed
199 * 2) Auto negotiation completed, but the card forgot
200 * to set ANLPAR.
201 * So we check the MII_DIAG(18) register...
202 */
203 diag = PHY_READ(phy, MII_DIAG);
204 if (diag & DIAG_NEGFAIL) /* assume 10baseT if no neg */
205 mii->mii_media_active |= IFM_10_T|IFM_HDX;
206 else {
207 if (diag & DIAG_DUPLEX)
208 mii->mii_media_active |= IFM_FDX;
209 else
210 mii->mii_media_active |= IFM_HDX;
211 if (diag & DIAG_RATE_100)
212 mii->mii_media_active |= IFM_100_TX;
213 else
214 mii->mii_media_active |= IFM_10_T;
215 }
216 }
217 if ((mii->mii_media_active & IFM_FDX) != 0)
218 mii->mii_media_active |= mii_phy_flowstatus(phy);
219 } else
220 mii->mii_media_active = ife->ifm_media;
221 }
222