1 /* $NetBSD: iophy.c,v 1.43 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 * Intel 82553 PHY driver
59 */
60
61 #include <sys/cdefs.h>
62 __KERNEL_RCSID(0, "$NetBSD: iophy.c,v 1.43 2020/03/15 23:04:50 thorpej Exp $");
63
64 #include <sys/param.h>
65 #include <sys/systm.h>
66 #include <sys/kernel.h>
67 #include <sys/device.h>
68 #include <sys/socket.h>
69
70 #include <net/if.h>
71 #include <net/if_media.h>
72
73 #include <dev/mii/mii.h>
74 #include <dev/mii/miivar.h>
75 #include <dev/mii/miidevs.h>
76
77 #include <dev/mii/iophyreg.h>
78
79 static int iophymatch(device_t, cfdata_t, void *);
80 static void iophyattach(device_t, device_t, void *);
81
82 CFATTACH_DECL_NEW(iophy, sizeof(struct mii_softc),
83 iophymatch, iophyattach, mii_phy_detach, mii_phy_activate);
84
85 static int iophy_service(struct mii_softc *, struct mii_data *, int);
86 static void iophy_status(struct mii_softc *);
87
88 static const struct mii_phy_funcs iophy_funcs = {
89 iophy_service, iophy_status, mii_phy_reset,
90 };
91
92 static const struct mii_phydesc iophys[] = {
93 MII_PHY_DESC(xxINTEL, I82553),
94 MII_PHY_DESC(yyINTEL, I82553),
95 MII_PHY_END,
96 };
97
98 static int
iophymatch(device_t parent,cfdata_t match,void * aux)99 iophymatch(device_t parent, cfdata_t match, void *aux)
100 {
101 struct mii_attach_args *ma = aux;
102
103 if (mii_phy_match(ma, iophys) != NULL)
104 return 10;
105
106 return 0;
107 }
108
109 static void
iophyattach(device_t parent,device_t self,void * aux)110 iophyattach(device_t parent, device_t self, void *aux)
111 {
112 struct mii_softc *sc = device_private(self);
113 struct mii_attach_args *ma = aux;
114 struct mii_data *mii = ma->mii_data;
115 const struct mii_phydesc *mpd;
116
117 mpd = mii_phy_match(ma, iophys);
118 aprint_naive(": Media interface\n");
119 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
120
121 sc->mii_dev = self;
122 sc->mii_inst = mii->mii_instance;
123 sc->mii_phy = ma->mii_phyno;
124 sc->mii_funcs = &iophy_funcs;
125 sc->mii_pdata = mii;
126 sc->mii_flags = ma->mii_flags;
127
128 mii_lock(mii);
129
130 PHY_RESET(sc);
131
132 PHY_READ(sc, MII_BMSR, &sc->mii_capabilities);
133 sc->mii_capabilities &= ma->mii_capmask;
134
135 mii_unlock(mii);
136
137 mii_phy_add_media(sc);
138 }
139
140 static int
iophy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)141 iophy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
142 {
143 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
144 uint16_t reg;
145
146 KASSERT(mii_locked(mii));
147
148 switch (cmd) {
149 case MII_POLLSTAT:
150 /* If we're not polling our PHY instance, just return. */
151 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
152 return 0;
153 break;
154
155 case MII_MEDIACHG:
156 /*
157 * If the media indicates a different PHY instance,
158 * isolate ourselves.
159 */
160 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
161 PHY_READ(sc, MII_BMCR, ®);
162 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
163 return 0;
164 }
165
166 /* If the interface is not up, don't do anything. */
167 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
168 break;
169
170 mii_phy_setmedia(sc);
171 break;
172
173 case MII_TICK:
174 /* If we're not currently selected, just return. */
175 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
176 return 0;
177
178 if (mii_phy_tick(sc) == EJUSTRETURN)
179 return 0;
180 break;
181
182 case MII_DOWN:
183 mii_phy_down(sc);
184 return 0;
185 }
186
187 /* Update the media status. */
188 mii_phy_status(sc);
189
190 /* Callback if something changed. */
191 mii_phy_update(sc, cmd);
192 return 0;
193 }
194
195 static void
iophy_status(struct mii_softc * sc)196 iophy_status(struct mii_softc *sc)
197 {
198 struct mii_data *mii = sc->mii_pdata;
199 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
200 uint16_t bmsr, bmcr, ext0;
201
202 KASSERT(mii_locked(mii));
203
204 mii->mii_media_status = IFM_AVALID;
205 mii->mii_media_active = IFM_ETHER;
206
207 PHY_READ(sc, MII_BMSR, &bmsr);
208 if (bmsr & BMSR_LINK)
209 mii->mii_media_status |= IFM_ACTIVE;
210
211 PHY_READ(sc, MII_BMCR, &bmcr);
212 if (bmcr & BMCR_ISO) {
213 mii->mii_media_active |= IFM_NONE;
214 mii->mii_media_status = 0;
215 return;
216 }
217
218 if (bmcr & BMCR_LOOP)
219 mii->mii_media_active |= IFM_LOOP;
220
221 if (bmcr & BMCR_AUTOEN) {
222 if ((bmsr & BMSR_ACOMP) == 0) {
223 /* Erg, still trying, I guess... */
224 mii->mii_media_active |= IFM_NONE;
225 return;
226 }
227 PHY_READ(sc, MII_IOPHY_EXT0, &ext0);
228
229 if (ext0 & EXT0_SPEED) {
230 if ((bmsr & BMSR_100TXFDX) || (bmsr & BMSR_100TXHDX))
231 mii->mii_media_active |= IFM_100_TX;
232 else if (bmsr & BMSR_100T4)
233 mii->mii_media_active |= IFM_100_T4;
234 } else
235 mii->mii_media_active |= IFM_10_T;
236
237 if (ext0 & EXT0_DUPLEX)
238 mii->mii_media_active |= IFM_FDX;
239 else
240 mii->mii_media_active |= IFM_HDX;
241 } else
242 mii->mii_media_active = ife->ifm_media;
243 }
244