1 /* $NetBSD: inphy.c,v 1.60 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 Intel's i82555 ethernet 10/100 PHY
59 * Data Sheet available from www.intel.com
60 */
61
62 #include <sys/cdefs.h>
63 __KERNEL_RCSID(0, "$NetBSD: inphy.c,v 1.60 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/inphyreg.h>
80
81 static int inphymatch(device_t, cfdata_t, void *);
82 static void inphyattach(device_t, device_t, void *);
83
84 CFATTACH_DECL_NEW(inphy, sizeof(struct mii_softc),
85 inphymatch, inphyattach, mii_phy_detach, mii_phy_activate);
86
87 static int inphy_service(struct mii_softc *, struct mii_data *, int);
88 static void inphy_status(struct mii_softc *);
89
90 static const struct mii_phy_funcs inphy_funcs = {
91 inphy_service, inphy_status, mii_phy_reset,
92 };
93
94 static const struct mii_phydesc inphys[] = {
95 MII_PHY_DESC(yyINTEL, I82555),
96 MII_PHY_DESC(yyINTEL, I82562EH),
97 MII_PHY_DESC(yyINTEL, I82562EM),
98 MII_PHY_DESC(yyINTEL, I82562ET),
99 MII_PHY_DESC(yyINTEL, I82562G),
100 MII_PHY_END,
101 };
102
103 static int
inphymatch(device_t parent,cfdata_t match,void * aux)104 inphymatch(device_t parent, cfdata_t match, void *aux)
105 {
106 struct mii_attach_args *ma = aux;
107
108 if (mii_phy_match(ma, inphys) != NULL)
109 return 10;
110
111 return 0;
112 }
113
114 static void
inphyattach(device_t parent,device_t self,void * aux)115 inphyattach(device_t parent, device_t self, void *aux)
116 {
117 struct mii_softc *sc = device_private(self);
118 struct mii_attach_args *ma = aux;
119 struct mii_data *mii = ma->mii_data;
120 const struct mii_phydesc *mpd;
121
122 mpd = mii_phy_match(ma, inphys);
123 aprint_naive(": Media interface\n");
124 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
125
126 sc->mii_dev = self;
127 sc->mii_inst = mii->mii_instance;
128 sc->mii_phy = ma->mii_phyno;
129 sc->mii_mpd_oui = MII_OUI(ma->mii_id1, ma->mii_id2);
130 sc->mii_mpd_model = MII_MODEL(ma->mii_id2);
131 sc->mii_mpd_rev = MII_REV(ma->mii_id2);
132 sc->mii_funcs = &inphy_funcs;
133 sc->mii_pdata = mii;
134 sc->mii_flags = ma->mii_flags;
135
136 mii_lock(mii);
137
138 PHY_RESET(sc);
139
140 PHY_READ(sc, MII_BMSR, &sc->mii_capabilities);
141 sc->mii_capabilities &= ma->mii_capmask;
142
143 mii_unlock(mii);
144
145 mii_phy_add_media(sc);
146 }
147
148 static int
inphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)149 inphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
150 {
151 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
152 uint16_t reg;
153
154 KASSERT(mii_locked(mii));
155
156 switch (cmd) {
157 case MII_POLLSTAT:
158 /* If we're not polling our PHY instance, just return. */
159 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
160 return 0;
161 break;
162
163 case MII_MEDIACHG:
164 /*
165 * If the media indicates a different PHY instance,
166 * isolate ourselves.
167 */
168 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
169 PHY_READ(sc, MII_BMCR, ®);
170 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
171 return 0;
172 }
173
174 /* If the interface is not up, don't do anything. */
175 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
176 break;
177
178 mii_phy_setmedia(sc);
179 break;
180
181 case MII_TICK:
182 /* If we're not currently selected, just return. */
183 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
184 return 0;
185
186 if (mii_phy_tick(sc) == EJUSTRETURN)
187 return 0;
188 break;
189
190 case MII_DOWN:
191 mii_phy_down(sc);
192 return 0;
193 }
194
195 /* Update the media status. */
196 mii_phy_status(sc);
197
198 /* Callback if something changed. */
199 mii_phy_update(sc, cmd);
200 return 0;
201 }
202
203 static void
inphy_status(struct mii_softc * sc)204 inphy_status(struct mii_softc *sc)
205 {
206 struct mii_data *mii = sc->mii_pdata;
207 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
208 uint16_t bmsr, bmcr, scr;
209
210 KASSERT(mii_locked(mii));
211
212 mii->mii_media_status = IFM_AVALID;
213 mii->mii_media_active = IFM_ETHER;
214
215 PHY_READ(sc, MII_BMSR, &bmsr);
216 PHY_READ(sc, MII_BMSR, &bmsr);
217 if (bmsr & BMSR_LINK)
218 mii->mii_media_status |= IFM_ACTIVE;
219
220 PHY_READ(sc, MII_BMCR, &bmcr);
221 if (bmcr & BMCR_ISO) {
222 mii->mii_media_active |= IFM_NONE;
223 mii->mii_media_status = 0;
224 return;
225 }
226
227 if (bmcr & BMCR_LOOP)
228 mii->mii_media_active |= IFM_LOOP;
229
230 if (bmcr & BMCR_AUTOEN) {
231 if ((bmsr & BMSR_ACOMP) == 0) {
232 /* Erg, still trying, I guess... */
233 mii->mii_media_active |= IFM_NONE;
234 return;
235 }
236
237 PHY_READ(sc, MII_INPHY_SCR, &scr);
238 if (scr & SCR_S100)
239 mii->mii_media_active |= IFM_100_TX;
240 else if ((bmsr & BMSR_100T4) && (scr & SCR_T4))
241 mii->mii_media_active |= IFM_100_T4;
242 else
243 mii->mii_media_active |= IFM_10_T;
244
245 if (scr & SCR_FDX)
246 mii->mii_media_active |= IFM_FDX;
247 else
248 mii->mii_media_active |= IFM_HDX;
249
250 if (mii->mii_media_active & IFM_FDX)
251 mii->mii_media_active |= mii_phy_flowstatus(sc);
252 } else
253 mii->mii_media_active = ife->ifm_media;
254 }
255