1 /* $NetBSD: dmphy.c,v 1.47 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 * driver for Davicom's DM9101 ethernet 10/100 PHY
59 * Data Sheet available from www.davicom8.com
60 */
61
62 #include <sys/cdefs.h>
63 __KERNEL_RCSID(0, "$NetBSD: dmphy.c,v 1.47 2020/03/15 23:04:50 thorpej Exp $");
64
65 #include <sys/param.h>
66 #include <sys/systm.h>
67 #include <sys/kernel.h>
68 #include <sys/device.h>
69 #include <sys/socket.h>
70 #include <sys/errno.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/dmphyreg.h>
80
81 static int dmphymatch(device_t, cfdata_t, void *);
82 static void dmphyattach(device_t, device_t, void *);
83
84 CFATTACH_DECL_NEW(dmphy, sizeof(struct mii_softc),
85 dmphymatch, dmphyattach, mii_phy_detach, mii_phy_activate);
86
87 static int dmphy_service(struct mii_softc *, struct mii_data *, int);
88 static void dmphy_status(struct mii_softc *);
89
90 static const struct mii_phy_funcs dmphy_funcs = {
91 dmphy_service, dmphy_status, mii_phy_reset,
92 };
93
94 static const struct mii_phydesc dmphys[] = {
95 MII_PHY_DESC(xxDAVICOM, DM9101),
96 MII_PHY_DESC(xxDAVICOM, DM9102),
97 MII_PHY_DESC(xxDAVICOM, DM9161),
98 MII_PHY_DESC(xxDAVICOM, DM9161A),
99 MII_PHY_DESC(xxDAVICOM, DM9161B),
100 MII_PHY_DESC(xxDAVICOM, DM9601),
101 MII_PHY_DESC(DAVICOM, DM9101),
102 MII_PHY_END,
103 };
104
105 static int
dmphymatch(device_t parent,cfdata_t match,void * aux)106 dmphymatch(device_t parent, cfdata_t match, void *aux)
107 {
108 struct mii_attach_args *ma = aux;
109
110 if (mii_phy_match(ma, dmphys) != NULL)
111 return 10;
112
113 return 0;
114 }
115
116 static void
dmphyattach(device_t parent,device_t self,void * aux)117 dmphyattach(device_t parent, device_t self, void *aux)
118 {
119 struct mii_softc *sc = device_private(self);
120 struct mii_attach_args *ma = aux;
121 struct mii_data *mii = ma->mii_data;
122 const struct mii_phydesc *mpd;
123
124 mpd = mii_phy_match(ma, dmphys);
125 aprint_naive(": Media interface\n");
126 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
127
128 sc->mii_dev = self;
129 sc->mii_inst = mii->mii_instance;
130 sc->mii_phy = ma->mii_phyno;
131 sc->mii_funcs = &dmphy_funcs;
132 sc->mii_pdata = mii;
133 sc->mii_flags = ma->mii_flags;
134
135 mii_lock(mii);
136
137 PHY_RESET(sc);
138
139 PHY_READ(sc, MII_BMSR, &sc->mii_capabilities);
140 sc->mii_capabilities &= ma->mii_capmask;
141
142 mii_unlock(mii);
143
144 mii_phy_add_media(sc);
145 }
146
147 static int
dmphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)148 dmphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
149 {
150 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
151 uint16_t reg;
152
153 KASSERT(mii_locked(mii));
154
155 switch (cmd) {
156 case MII_POLLSTAT:
157 /* If we're not polling our PHY instance, just return. */
158 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
159 return 0;
160 break;
161
162 case MII_MEDIACHG:
163 /*
164 * If the media indicates a different PHY instance,
165 * isolate ourselves.
166 */
167 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
168 PHY_READ(sc, MII_BMCR, ®);
169 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
170 return 0;
171 }
172
173 /* If the interface is not up, don't do anything. */
174 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
175 break;
176
177 mii_phy_setmedia(sc);
178 break;
179
180 case MII_TICK:
181 /* If we're not currently selected, just return. */
182 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
183 return 0;
184
185 if (mii_phy_tick(sc) == EJUSTRETURN)
186 return 0;
187 break;
188
189 case MII_DOWN:
190 mii_phy_down(sc);
191 return 0;
192 }
193
194 /* Update the media status. */
195 mii_phy_status(sc);
196
197 /* Callback if something changed. */
198 mii_phy_update(sc, cmd);
199 return 0;
200 }
201
202 static void
dmphy_status(struct mii_softc * sc)203 dmphy_status(struct mii_softc *sc)
204 {
205 struct mii_data *mii = sc->mii_pdata;
206 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
207 uint16_t bmsr, bmcr, dscsr;
208
209 KASSERT(mii_locked(mii));
210
211 mii->mii_media_status = IFM_AVALID;
212 mii->mii_media_active = IFM_ETHER;
213
214 PHY_READ(sc, MII_BMSR, &bmsr);
215 PHY_READ(sc, MII_BMSR, &bmsr);
216 if (bmsr & BMSR_LINK)
217 mii->mii_media_status |= IFM_ACTIVE;
218
219 PHY_READ(sc, MII_BMCR, &bmcr);
220 if (bmcr & BMCR_ISO) {
221 mii->mii_media_active |= IFM_NONE;
222 mii->mii_media_status = 0;
223 return;
224 }
225
226 if (bmcr & BMCR_LOOP)
227 mii->mii_media_active |= IFM_LOOP;
228
229 if (bmcr & BMCR_AUTOEN) {
230 /*
231 * The PAR status bits are only valid if autonegotiation
232 * has completed (or it's disabled).
233 */
234 if ((bmsr & BMSR_ACOMP) == 0) {
235 /* Erg, still trying, I guess... */
236 mii->mii_media_active |= IFM_NONE;
237 return;
238 }
239
240 PHY_READ(sc, MII_DMPHY_DSCSR, &dscsr);
241 if (dscsr & DSCSR_100FDX)
242 mii->mii_media_active |= IFM_100_TX | IFM_FDX;
243 else if (dscsr & DSCSR_100HDX)
244 mii->mii_media_active |= IFM_100_TX | IFM_HDX;
245 else if (dscsr & DSCSR_10FDX)
246 mii->mii_media_active |= IFM_10_T | IFM_FDX;
247 else if (dscsr & DSCSR_10HDX)
248 mii->mii_media_active |= IFM_10_T | IFM_HDX;
249 else
250 mii->mii_media_active |= IFM_NONE;
251 if (mii->mii_media_active & IFM_FDX)
252 mii->mii_media_active |= mii_phy_flowstatus(sc);
253 } else
254 mii->mii_media_active = ife->ifm_media;
255 }
256