1 /* $OpenBSD: amphy.c,v 1.22 2022/04/06 18:59:29 naddy Exp $ */
2
3 /*
4 * Copyright (c) 1997, 1998, 1999
5 * Bill Paul <wpaul@ee.columbia.edu>. 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. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Bill Paul.
18 * 4. Neither the name of the author nor the names of any co-contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
33 *
34 * $FreeBSD: src/sys/dev/mii/amphy.c,v 1.3 2000/04/19 14:57:29 phk Exp $
35 */
36
37 /*
38 * driver for AMD AM79c873 PHYs
39 * This driver also works for the Davicom DM9101 PHY, which appears to
40 * be an AM79c873 workalike.
41 */
42
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/device.h>
46 #include <sys/socket.h>
47
48 #include <net/if.h>
49 #include <net/if_var.h>
50 #include <net/if_media.h>
51
52 #include <dev/mii/mii.h>
53 #include <dev/mii/miivar.h>
54 #include <dev/mii/miidevs.h>
55
56 #include <dev/mii/amphyreg.h>
57
58 int amphymatch(struct device *, void *, void *);
59 void amphyattach(struct device *, struct device *, void *);
60
61 const struct cfattach amphy_ca = {
62 sizeof(struct mii_softc), amphymatch, amphyattach, mii_phy_detach
63 };
64
65 struct cfdriver amphy_cd = {
66 NULL, "amphy", DV_DULL
67 };
68
69 int amphy_service(struct mii_softc *, struct mii_data *, int);
70 void amphy_status(struct mii_softc *);
71
72 const struct mii_phy_funcs amphy_funcs = {
73 amphy_service, amphy_status, mii_phy_reset,
74 };
75
76 static const struct mii_phydesc amphys[] = {
77 { MII_OUI_xxAMD, MII_MODEL_xxAMD_79C873,
78 MII_STR_xxAMD_79C873 },
79 { MII_OUI_xxDAVICOM, MII_MODEL_xxDAVICOM_DM9101,
80 MII_STR_xxDAVICOM_DM9101 },
81 { MII_OUI_DAVICOM, MII_MODEL_DAVICOM_DM9102,
82 MII_STR_DAVICOM_DM9102 },
83 { MII_OUI_DAVICOM, MII_MODEL_DAVICOM_DM9601,
84 MII_STR_DAVICOM_DM9601 },
85 { MII_OUI_xxALTIMA, MII_MODEL_AMD_79C875phy,
86 MII_STR_AMD_79C875phy },
87
88 { 0, 0,
89 NULL },
90 };
91
92 int
amphymatch(struct device * parent,void * match,void * aux)93 amphymatch(struct device *parent, void *match, void *aux)
94 {
95 struct mii_attach_args *ma = aux;
96
97 if (mii_phy_match(ma, amphys) != NULL)
98 return (10);
99
100 return (0);
101 }
102
103 void
amphyattach(struct device * parent,struct device * self,void * aux)104 amphyattach(struct device *parent, struct device *self, void *aux)
105 {
106 struct mii_softc *sc = (struct mii_softc *)self;
107 struct mii_attach_args *ma = aux;
108 struct mii_data *mii = ma->mii_data;
109 const struct mii_phydesc *mpd;
110
111 mpd = mii_phy_match(ma, amphys);
112 printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
113
114 sc->mii_inst = mii->mii_instance;
115 sc->mii_phy = ma->mii_phyno;
116 sc->mii_funcs = &hy_funcs;
117 sc->mii_pdata = mii;
118 sc->mii_flags = ma->mii_flags;
119
120 sc->mii_flags |= MIIF_NOISOLATE;
121
122 PHY_RESET(sc);
123
124 sc->mii_capabilities =
125 PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
126 if (sc->mii_capabilities & BMSR_MEDIAMASK)
127 mii_phy_add_media(sc);
128 }
129
130 int
amphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)131 amphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
132 {
133 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
134 int reg;
135
136 switch (cmd) {
137 case MII_POLLSTAT:
138 /*
139 * If we're not polling our PHY instance, just return.
140 */
141 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
142 return (0);
143 break;
144
145 case MII_MEDIACHG:
146 /*
147 * If the media indicates a different PHY instance,
148 * isolate ourselves.
149 */
150 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
151 reg = PHY_READ(sc, MII_BMCR);
152 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
153 return (0);
154 }
155
156 /*
157 * If the interface is not up, don't do anything.
158 */
159 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
160 break;
161
162 mii_phy_setmedia(sc);
163 break;
164
165 case MII_TICK:
166 /*
167 * If we're not currently selected, just return.
168 */
169 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
170 return (0);
171
172 if (mii_phy_tick(sc) == EJUSTRETURN)
173 return (0);
174 break;
175 case MII_DOWN:
176 mii_phy_down(sc);
177 return (0);
178 }
179
180 /* Update the media status. */
181 mii_phy_status(sc);
182
183 /* Callback if something changed. */
184 mii_phy_update(sc, cmd);
185 return (0);
186 }
187
188 void
amphy_status(struct mii_softc * sc)189 amphy_status(struct mii_softc *sc)
190 {
191 struct mii_data *mii = sc->mii_pdata;
192 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
193 int bmsr, bmcr, par, anlpar;
194
195 mii->mii_media_status = IFM_AVALID;
196 mii->mii_media_active = IFM_ETHER;
197
198 bmsr = PHY_READ(sc, MII_BMSR) |
199 PHY_READ(sc, MII_BMSR);
200 if (bmsr & BMSR_LINK)
201 mii->mii_media_status |= IFM_ACTIVE;
202
203 bmcr = PHY_READ(sc, MII_BMCR);
204 if (bmcr & BMCR_ISO) {
205 mii->mii_media_active |= IFM_NONE;
206 mii->mii_media_status = 0;
207 return;
208 }
209
210 if (bmcr & BMCR_LOOP)
211 mii->mii_media_active |= IFM_LOOP;
212
213 if (bmcr & BMCR_AUTOEN) {
214 /*
215 * The PAR status bits are only valid if autonegotiation
216 * has completed (or it's disabled).
217 */
218 if ((bmsr & BMSR_ACOMP) == 0) {
219 /* Erg, still trying, I guess... */
220 mii->mii_media_active |= IFM_NONE;
221 return;
222 }
223
224 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
225 anlpar = PHY_READ(sc, MII_ANAR) &
226 PHY_READ(sc, MII_ANLPAR);
227 if (anlpar & ANLPAR_TX_FD)
228 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
229 else if (anlpar & ANLPAR_T4)
230 mii->mii_media_active |= IFM_100_T4|IFM_HDX;
231 else if (anlpar & ANLPAR_TX)
232 mii->mii_media_active |= IFM_100_TX|IFM_HDX;
233 else if (anlpar & ANLPAR_10_FD)
234 mii->mii_media_active |= IFM_10_T|IFM_FDX;
235 else if (anlpar & ANLPAR_10)
236 mii->mii_media_active |= IFM_10_T|IFM_HDX;
237 else
238 mii->mii_media_active |= IFM_NONE;
239 return;
240 }
241
242 /*
243 * Link partner is not capable of autonegotiation.
244 */
245 par = PHY_READ(sc, MII_AMPHY_DSCSR);
246 if (par & DSCSR_100FDX)
247 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
248 else if (par & DSCSR_100HDX)
249 mii->mii_media_active |= IFM_100_TX|IFM_HDX;
250 else if (par & DSCSR_10FDX)
251 mii->mii_media_active |= IFM_10_T|IFM_FDX;
252 else if (par & DSCSR_10HDX)
253 mii->mii_media_active |= IFM_10_T|IFM_HDX;
254 } else
255 mii->mii_media_active = ife->ifm_media;
256 }
257