1 /* $NetBSD: glxtphy.c,v 1.32 2020/03/15 23:04:50 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1998, 1999, 2000, 2001 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 the Level One LXT-1000 10/100/1000 PHY.
59 */
60
61 #include <sys/cdefs.h>
62 __KERNEL_RCSID(0, "$NetBSD: glxtphy.c,v 1.32 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 #include <sys/errno.h>
70
71 #include <net/if.h>
72 #include <net/if_media.h>
73
74 #include <dev/mii/mii.h>
75 #include <dev/mii/miivar.h>
76 #include <dev/mii/miidevs.h>
77
78 #include <dev/mii/glxtphyreg.h>
79
80 static int glxtphymatch(device_t, cfdata_t, void *);
81 static void glxtphyattach(device_t, device_t, void *);
82
83 CFATTACH_DECL_NEW(glxtphy, sizeof(struct mii_softc),
84 glxtphymatch, glxtphyattach, mii_phy_detach, mii_phy_activate);
85
86 static int glxtphy_service(struct mii_softc *, struct mii_data *, int);
87 static void glxtphy_status(struct mii_softc *);
88
89 static const struct mii_phy_funcs glxtphy_funcs = {
90 glxtphy_service, glxtphy_status, mii_phy_reset,
91 };
92
93 static const struct mii_phydesc glxtphys[] = {
94 MII_PHY_DESC(LEVEL1, LXT1000_OLD),
95 MII_PHY_DESC(LEVEL1, LXT1000),
96 MII_PHY_END,
97 };
98
99 static int
glxtphymatch(device_t parent,cfdata_t match,void * aux)100 glxtphymatch(device_t parent, cfdata_t match, void *aux)
101 {
102 struct mii_attach_args *ma = aux;
103
104 if (mii_phy_match(ma, glxtphys) != NULL)
105 return 10;
106
107 return 0;
108 }
109
110 static void
glxtphyattach(device_t parent,device_t self,void * aux)111 glxtphyattach(device_t parent, device_t self, void *aux)
112 {
113 struct mii_softc *sc = device_private(self);
114 struct mii_attach_args *ma = aux;
115 struct mii_data *mii = ma->mii_data;
116 const struct mii_phydesc *mpd;
117
118 mpd = mii_phy_match(ma, glxtphys);
119 aprint_naive(": Media interface\n");
120 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
121
122 sc->mii_dev = self;
123 sc->mii_inst = mii->mii_instance;
124 sc->mii_phy = ma->mii_phyno;
125 sc->mii_funcs = &glxtphy_funcs;
126 sc->mii_pdata = mii;
127 sc->mii_flags = ma->mii_flags;
128
129 mii_lock(mii);
130
131 PHY_RESET(sc);
132
133 PHY_READ(sc, MII_BMSR, &sc->mii_capabilities);
134 sc->mii_capabilities &= ma->mii_capmask;
135 if (sc->mii_capabilities & BMSR_EXTSTAT)
136 PHY_READ(sc, MII_EXTSR, &sc->mii_extcapabilities);
137
138 mii_unlock(mii);
139
140 mii_phy_add_media(sc);
141 }
142
143 static int
glxtphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)144 glxtphy_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
glxtphy_status(struct mii_softc * sc)199 glxtphy_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 bmcr, qsr, gtsr;
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_GLXTPHY_QSR, &qsr);
211
212 if (qsr & QSR_LINK)
213 mii->mii_media_status |= IFM_ACTIVE;
214
215 PHY_READ(sc, MII_BMCR, &bmcr);
216 if (bmcr & BMCR_ISO) {
217 mii->mii_media_active |= IFM_NONE;
218 mii->mii_media_status = 0;
219 return;
220 }
221
222 if (bmcr & BMCR_LOOP)
223 mii->mii_media_active |= IFM_LOOP;
224
225 if (bmcr & BMCR_AUTOEN) {
226 /*
227 * The media status bits are only valid if autonegotiation
228 * has completed (or it's disabled).
229 */
230 if ((qsr & QSR_ACOMP) == 0) {
231 /* Erg, still trying, I guess... */
232 mii->mii_media_active |= IFM_NONE;
233 return;
234 }
235
236 switch (QSR_SPEED_get(qsr)) {
237 case SPEED_1000:
238 mii->mii_media_active |= IFM_1000_T;
239 PHY_READ(sc, MII_100T2SR, >sr);
240 if (gtsr & GTSR_MS_RES)
241 mii->mii_media_active |= IFM_ETH_MASTER;
242 break;
243
244 case SPEED_100:
245 mii->mii_media_active |= IFM_100_TX;
246 break;
247
248 case SPEED_10_MII:
249 case SPEED_10_SERIAL:
250 mii->mii_media_active |= IFM_10_T;
251 break;
252 }
253
254 if (qsr & QSR_DUPLEX)
255 mii->mii_media_active |=
256 IFM_FDX | mii_phy_flowstatus(sc);
257 else
258 mii->mii_media_active |= IFM_HDX;
259 } else
260 mii->mii_media_active = ife->ifm_media;
261 }
262