1 /* $NetBSD: tqphy.c,v 1.45 2020/03/15 23:04:50 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
9 * NASA Ames Research Center.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /*
34 * Copyright (c) 1997 Manuel Bouyer. All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 *
45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
48 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
49 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
51 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
52 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
53 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
54 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
55 */
56
57 /*
58 * TDK TSC78Q2120 PHY driver
59 *
60 * Documentation available at http://www.tsc.tdk.com/lan/78Q2120.pdf .
61 */
62
63 #include <sys/cdefs.h>
64 __KERNEL_RCSID(0, "$NetBSD: tqphy.c,v 1.45 2020/03/15 23:04:50 thorpej Exp $");
65
66 #include <sys/param.h>
67 #include <sys/systm.h>
68 #include <sys/kernel.h>
69 #include <sys/device.h>
70 #include <sys/socket.h>
71
72 #include <net/if.h>
73 #include <net/if_media.h>
74
75 #include <dev/mii/mii.h>
76 #include <dev/mii/miivar.h>
77 #include <dev/mii/miidevs.h>
78
79 #include <dev/mii/tqphyreg.h>
80
81 static int tqphymatch(device_t, cfdata_t, void *);
82 static void tqphyattach(device_t, device_t, void *);
83
84 CFATTACH_DECL_NEW(tqphy, sizeof(struct mii_softc),
85 tqphymatch, tqphyattach, mii_phy_detach, mii_phy_activate);
86
87 static int tqphy_service(struct mii_softc *, struct mii_data *, int);
88 static void tqphy_status(struct mii_softc *);
89
90 static const struct mii_phy_funcs tqphy_funcs = {
91 tqphy_service, tqphy_status, mii_phy_reset,
92 };
93
94 static const struct mii_phydesc tqphys[] = {
95 MII_PHY_DESC(xxTSC, 78Q2120),
96 #if 0
97 MII_PHY_DESC(xxTSC, 78Q2121),
98 #endif
99 MII_PHY_END,
100 };
101
102 static int
tqphymatch(device_t parent,cfdata_t match,void * aux)103 tqphymatch(device_t parent, cfdata_t match, void *aux)
104 {
105 struct mii_attach_args *ma = aux;
106
107 if (mii_phy_match(ma, tqphys) != NULL) {
108 /* The DIAG register is unreliable on early revisions. */
109 if (MII_MODEL(ma->mii_id2) == MII_MODEL_xxTSC_78Q2120 &&
110 MII_REV(ma->mii_id2) <= 3)
111 return 0;
112 return 10;
113 }
114
115 return 0;
116 }
117
118 static void
tqphyattach(device_t parent,device_t self,void * aux)119 tqphyattach(device_t parent, device_t self, void *aux)
120 {
121 struct mii_softc *sc = device_private(self);
122 struct mii_attach_args *ma = aux;
123 struct mii_data *mii = ma->mii_data;
124 const struct mii_phydesc *mpd;
125
126 mpd = mii_phy_match(ma, tqphys);
127 aprint_naive(": Media interface\n");
128 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
129
130 sc->mii_dev = self;
131 sc->mii_inst = mii->mii_instance;
132 sc->mii_phy = ma->mii_phyno;
133 sc->mii_funcs = &tqphy_funcs;
134 sc->mii_pdata = mii;
135 sc->mii_flags = ma->mii_flags;
136
137 /* Apparently, we can't do loopback on this PHY. */
138 sc->mii_flags |= MIIF_NOLOOP;
139
140 mii_lock(mii);
141
142 PHY_RESET(sc);
143
144 PHY_READ(sc, MII_BMSR, &sc->mii_capabilities);
145 sc->mii_capabilities &= ma->mii_capmask;
146
147 mii_unlock(mii);
148
149 mii_phy_add_media(sc);
150 }
151
152 static int
tqphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)153 tqphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
154 {
155 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
156 uint16_t reg;
157
158 KASSERT(mii_locked(mii));
159
160 switch (cmd) {
161 case MII_POLLSTAT:
162 /* If we're not polling our PHY instance, just return. */
163 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
164 return 0;
165 break;
166
167 case MII_MEDIACHG:
168 /*
169 * If the media indicates a different PHY instance,
170 * isolate ourselves.
171 */
172 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
173 PHY_READ(sc, MII_BMCR, ®);
174 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
175 return 0;
176 }
177
178 /* If the interface is not up, don't do anything. */
179 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
180 break;
181
182 mii_phy_setmedia(sc);
183 break;
184
185 case MII_TICK:
186 /* If we're not currently selected, just return. */
187 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
188 return 0;
189
190 if (mii_phy_tick(sc) == EJUSTRETURN)
191 return 0;
192 break;
193
194 case MII_DOWN:
195 mii_phy_down(sc);
196 return 0;
197 }
198
199 /* Update the media status. */
200 mii_phy_status(sc);
201
202 /* Callback if something changed. */
203 mii_phy_update(sc, cmd);
204 return 0;
205 }
206
207 static void
tqphy_status(struct mii_softc * sc)208 tqphy_status(struct mii_softc *sc)
209 {
210 struct mii_data *mii = sc->mii_pdata;
211 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
212 uint16_t bmsr, bmcr, diag;
213
214 KASSERT(mii_locked(mii));
215
216 mii->mii_media_status = IFM_AVALID;
217 mii->mii_media_active = IFM_ETHER;
218
219 PHY_READ(sc, MII_BMSR, &bmsr);
220 PHY_READ(sc, MII_BMSR, &bmsr);
221 if (bmsr & BMSR_LINK)
222 mii->mii_media_status |= IFM_ACTIVE;
223
224 PHY_READ(sc, MII_BMCR, &bmcr);
225 if (bmcr & BMCR_ISO) {
226 mii->mii_media_active |= IFM_NONE;
227 mii->mii_media_status = 0;
228 return;
229 }
230
231 if (bmcr & BMCR_LOOP)
232 mii->mii_media_active |= IFM_LOOP;
233
234 if (bmcr & BMCR_AUTOEN) {
235 if ((bmsr & BMSR_ACOMP) == 0) {
236 /* Erg, still trying, I guess... */
237 mii->mii_media_active |= IFM_NONE;
238 return;
239 }
240 PHY_READ(sc, MII_TQPHY_DIAG, &diag);
241 if (diag & DIAG_RATE)
242 mii->mii_media_active |= IFM_100_TX;
243 else
244 mii->mii_media_active |= IFM_10_T;
245
246 if (diag & DIAG_DPLX)
247 mii->mii_media_active |= IFM_FDX;
248 else
249 mii->mii_media_active |= IFM_HDX;
250 } else
251 mii->mii_media_active = ife->ifm_media;
252 }
253