1 /* $NetBSD: acphy.c,v 1.30 2020/03/15 23:04:50 thorpej Exp $ */
2
3 /*
4 * Copyright 2001 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 /*
39 * Driver for the Altima AC101 PHY.
40 */
41
42 #include <sys/cdefs.h>
43 __KERNEL_RCSID(0, "$NetBSD: acphy.c,v 1.30 2020/03/15 23:04:50 thorpej Exp $");
44
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/kernel.h>
48 #include <sys/device.h>
49 #include <sys/socket.h>
50 #include <sys/errno.h>
51
52 #include <net/if.h>
53 #include <net/if_media.h>
54
55 #include <dev/mii/mii.h>
56 #include <dev/mii/miivar.h>
57 #include <dev/mii/miidevs.h>
58
59 #include <dev/mii/acphyreg.h>
60
61 static int acphymatch(device_t, cfdata_t, void *);
62 static void acphyattach(device_t, device_t, void *);
63
64 CFATTACH_DECL_NEW(acphy, sizeof(struct mii_softc),
65 acphymatch, acphyattach, mii_phy_detach, mii_phy_activate);
66
67 static int acphy_service(struct mii_softc *, struct mii_data *, int);
68 static void acphy_status(struct mii_softc *);
69
70 static const struct mii_phy_funcs acphy_funcs = {
71 acphy_service, acphy_status, mii_phy_reset,
72 };
73
74 static const struct mii_phydesc acphys[] = {
75 MII_PHY_DESC(ALTIMA, AC101),
76 MII_PHY_DESC(ALTIMA, AC101L),
77 MII_PHY_DESC(ALTIMA, Am79C874),
78 MII_PHY_DESC(ALTIMA, Am79C875),
79 /* XXX This is reported to work, but it's not from any data sheet. */
80 MII_PHY_DESC(ALTIMA, ACXXX),
81 MII_PHY_END,
82 };
83
84 static int
acphymatch(device_t parent,cfdata_t match,void * aux)85 acphymatch(device_t parent, cfdata_t match, void *aux)
86 {
87 struct mii_attach_args *ma = aux;
88
89 if (mii_phy_match(ma, acphys) != NULL)
90 return 10;
91
92 return 0;
93 }
94
95 static void
acphyattach(device_t parent,device_t self,void * aux)96 acphyattach(device_t parent, device_t self, void *aux)
97 {
98 struct mii_softc *sc = device_private(self);
99 struct mii_attach_args *ma = aux;
100 struct mii_data *mii = ma->mii_data;
101 const struct mii_phydesc *mpd;
102
103 mpd = mii_phy_match(ma, acphys);
104 aprint_naive(": Media interface\n");
105 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
106
107 sc->mii_dev = self;
108 sc->mii_inst = mii->mii_instance;
109 sc->mii_phy = ma->mii_phyno;
110 sc->mii_funcs = &acphy_funcs;
111 sc->mii_pdata = mii;
112 sc->mii_flags = ma->mii_flags;
113
114 mii_lock(mii);
115
116 PHY_RESET(sc);
117
118 /* XXX Check MCR_FX_SEL to set MIIF_HAVE_FIBER? */
119
120 PHY_READ(sc, MII_BMSR, &sc->mii_capabilities);
121 sc->mii_capabilities &= ma->mii_capmask;
122
123 mii_unlock(mii);
124
125 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
126 if (sc->mii_flags & MIIF_HAVEFIBER) {
127 aprint_normal_dev(sc->mii_dev, "");
128 mii_lock(mii);
129 sc->mii_anegticks = MII_ANEGTICKS;
130 mii_unlock(mii);
131 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, 0, sc->mii_inst),
132 MII_MEDIA_100_TX);
133 aprint_normal("100baseFX, ");
134 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, IFM_FDX, sc->mii_inst),
135 MII_MEDIA_100_TX);
136 aprint_normal("100baseFX-FDX\n");
137 }
138 #undef ADD
139
140 mii_phy_add_media(sc);
141 }
142
143 static int
acphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)144 acphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
145 {
146 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
147 uint16_t reg;
148
149 KASSERT(mii_locked(mii));
150
151 switch (cmd) {
152 case MII_POLLSTAT:
153 /* If we're not polling our PHY instance, just return. */
154 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
155 return 0;
156 break;
157
158 case MII_MEDIACHG:
159 /*
160 * If the media indicates a different PHY instance,
161 * isolate ourselves.
162 */
163 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
164 PHY_READ(sc, MII_BMCR, ®);
165 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
166 return 0;
167 }
168
169 /* If the interface is not up, don't do anything. */
170 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
171 break;
172
173 mii_phy_setmedia(sc);
174 break;
175
176 case MII_TICK:
177 /* If we're not currently selected, just return. */
178 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
179 return 0;
180
181 if (mii_phy_tick(sc) == EJUSTRETURN)
182 return 0;
183 break;
184
185 case MII_DOWN:
186 mii_phy_down(sc);
187 return 0;
188 }
189
190 /* Update the media status. */
191 mii_phy_status(sc);
192
193 /* Callback if something changed. */
194 mii_phy_update(sc, cmd);
195 return 0;
196 }
197
198 static void
acphy_status(struct mii_softc * sc)199 acphy_status(struct mii_softc *sc)
200 {
201 struct mii_data *mii = sc->mii_pdata;
202 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
203 uint16_t bmsr, bmcr, dr;
204
205 KASSERT(mii_locked(mii));
206
207 mii->mii_media_status = IFM_AVALID;
208 mii->mii_media_active = IFM_ETHER;
209
210 PHY_READ(sc, MII_BMSR, &bmsr);
211 PHY_READ(sc, MII_BMSR, &bmsr);
212 PHY_READ(sc, MII_ACPHY_DR, &dr);
213
214 if (bmsr & BMSR_LINK)
215 mii->mii_media_status |= IFM_ACTIVE;
216
217 PHY_READ(sc, MII_BMCR, &bmcr);
218 if (bmcr & BMCR_ISO) {
219 mii->mii_media_active |= IFM_NONE;
220 mii->mii_media_status = 0;
221 return;
222 }
223
224 if (bmcr & BMCR_LOOP)
225 mii->mii_media_active |= IFM_LOOP;
226
227 if (bmcr & BMCR_AUTOEN) {
228 /*
229 * The media status bits are only valid if autonegotiation
230 * has completed (or it's disabled).
231 */
232 if ((bmsr & BMSR_ACOMP) == 0) {
233 /* Erg, still trying, I guess... */
234 mii->mii_media_active |= IFM_NONE;
235 return;
236 }
237
238 if (dr & DR_SPEED)
239 mii->mii_media_active |= IFM_100_TX;
240 else
241 mii->mii_media_active |= IFM_10_T;
242
243 if (dr & DR_DPLX)
244 mii->mii_media_active |= IFM_FDX;
245 else
246 mii->mii_media_active |= IFM_HDX;
247 } else
248 mii->mii_media_active = ife->ifm_media;
249 }
250