1 /* $NetBSD: dmphy.c,v 1.36 2016/07/07 06:55:41 msaitoh 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 1.36 2016/07/07 06:55:41 msaitoh 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_OUI_xxDAVICOM, MII_MODEL_xxDAVICOM_DM9101,
96 MII_STR_xxDAVICOM_DM9101 },
97
98 { MII_OUI_xxDAVICOM, MII_MODEL_xxDAVICOM_DM9102,
99 MII_STR_xxDAVICOM_DM9102 },
100
101 { MII_OUI_DAVICOM, MII_MODEL_xxDAVICOM_DM9101,
102 MII_STR_xxDAVICOM_DM9101 },
103
104 { 0, 0,
105 NULL },
106 };
107
108 static int
dmphymatch(device_t parent,cfdata_t match,void * aux)109 dmphymatch(device_t parent, cfdata_t match, void *aux)
110 {
111 struct mii_attach_args *ma = aux;
112
113 if (mii_phy_match(ma, dmphys) != NULL)
114 return (10);
115
116 return (0);
117 }
118
119 static void
dmphyattach(device_t parent,device_t self,void * aux)120 dmphyattach(device_t parent, device_t self, void *aux)
121 {
122 struct mii_softc *sc = device_private(self);
123 struct mii_attach_args *ma = aux;
124 struct mii_data *mii = ma->mii_data;
125 const struct mii_phydesc *mpd;
126
127 mpd = mii_phy_match(ma, dmphys);
128 aprint_naive(": Media interface\n");
129 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
130
131 sc->mii_dev = self;
132 sc->mii_inst = mii->mii_instance;
133 sc->mii_phy = ma->mii_phyno;
134 sc->mii_funcs = &dmphy_funcs;
135 sc->mii_pdata = mii;
136 sc->mii_flags = ma->mii_flags;
137 sc->mii_anegticks = MII_ANEGTICKS;
138
139 PHY_RESET(sc);
140
141 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
142 aprint_normal_dev(self, "");
143 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
144 aprint_error("no media present");
145 else
146 mii_phy_add_media(sc);
147 aprint_normal("\n");
148 }
149
150 static int
dmphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)151 dmphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
152 {
153 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
154 int reg;
155
156 switch (cmd) {
157 case MII_POLLSTAT:
158 /*
159 * If we're not polling our PHY instance, just return.
160 */
161 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
162 return (0);
163 break;
164
165 case MII_MEDIACHG:
166 /*
167 * If the media indicates a different PHY instance,
168 * isolate ourselves.
169 */
170 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
171 reg = PHY_READ(sc, MII_BMCR);
172 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
173 return (0);
174 }
175
176 /*
177 * If the interface is not up, don't do anything.
178 */
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 /*
187 * If we're not currently selected, just return.
188 */
189 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
190 return (0);
191
192 if (mii_phy_tick(sc) == EJUSTRETURN)
193 return (0);
194 break;
195
196 case MII_DOWN:
197 mii_phy_down(sc);
198 return (0);
199 }
200
201 /* Update the media status. */
202 mii_phy_status(sc);
203
204 /* Callback if something changed. */
205 mii_phy_update(sc, cmd);
206 return (0);
207 }
208
209 static void
dmphy_status(struct mii_softc * sc)210 dmphy_status(struct mii_softc *sc)
211 {
212 struct mii_data *mii = sc->mii_pdata;
213 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
214 int bmsr, bmcr, dscsr;
215
216 mii->mii_media_status = IFM_AVALID;
217 mii->mii_media_active = IFM_ETHER;
218
219 bmsr = PHY_READ(sc, MII_BMSR) |
220 PHY_READ(sc, MII_BMSR);
221 if (bmsr & BMSR_LINK)
222 mii->mii_media_status |= IFM_ACTIVE;
223
224 bmcr = PHY_READ(sc, MII_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 /*
236 * The PAR status bits are only valid of autonegotiation
237 * has completed (or it's disabled).
238 */
239 if ((bmsr & BMSR_ACOMP) == 0) {
240 /* Erg, still trying, I guess... */
241 mii->mii_media_active |= IFM_NONE;
242 return;
243 }
244
245 dscsr = PHY_READ(sc, MII_DMPHY_DSCSR);
246 if (dscsr & DSCSR_100FDX)
247 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
248 else if (dscsr & DSCSR_100HDX)
249 mii->mii_media_active |= IFM_100_TX|IFM_HDX;
250 else if (dscsr & DSCSR_10FDX)
251 mii->mii_media_active |= IFM_10_T|IFM_FDX;
252 else if (dscsr & DSCSR_10HDX)
253 mii->mii_media_active |= IFM_10_T|IFM_HDX;
254 else
255 mii->mii_media_active |= IFM_NONE;
256 } else
257 mii->mii_media_active = ife->ifm_media;
258 }
259