1 /* $OpenBSD: gentbi.c,v 1.12 2022/04/06 18:59:29 naddy Exp $ */
2 /* $NetBSD: gentbi.c,v 1.12 2004/04/11 15:40:56 thorpej Exp $ */
3
4 /*-
5 * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
10 * NASA Ames Research Center.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 /*
35 * Copyright (c) 1997 Manuel Bouyer. All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 *
46 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
47 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
48 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
49 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
50 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
51 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
52 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
53 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
54 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
55 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
56 */
57
58 /*
59 * Driver for generic ten-bit (1000BASE-SX) interfaces, built in to
60 * many Gigabit Ethernet chips.
61 *
62 * All we have to do here is correctly report speed and duplex.
63 */
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_var.h>
74 #include <net/if_media.h>
75
76 #include <dev/mii/mii.h>
77 #include <dev/mii/miivar.h>
78
79 int gentbimatch(struct device *, void *, void *);
80 void gentbiattach(struct device *, struct device *, void *);
81
82 const struct cfattach gentbi_ca = {
83 sizeof(struct mii_softc), gentbimatch, gentbiattach,
84 mii_phy_detach
85 };
86
87 struct cfdriver gentbi_cd = {
88 NULL, "gentbi", DV_DULL
89 };
90
91 int gentbi_service(struct mii_softc *, struct mii_data *, int);
92 void gentbi_status(struct mii_softc *);
93
94 const struct mii_phy_funcs gentbi_funcs = {
95 gentbi_service, gentbi_status, mii_phy_reset,
96 };
97
98 int
gentbimatch(struct device * parent,void * match,void * aux)99 gentbimatch(struct device *parent, void *match, void *aux)
100 {
101 struct mii_attach_args *ma = aux;
102 struct mii_data *mii = ma->mii_data;
103 int bmsr, extsr;
104
105 /*
106 * We match as a generic TBI if:
107 *
108 * - There is no media in the BMSR.
109 * - EXTSR has only 1000X.
110 */
111 bmsr = (*mii->mii_readreg)(parent, ma->mii_phyno, MII_BMSR);
112 if ((bmsr & BMSR_EXTSTAT) == 0 || (bmsr & BMSR_MEDIAMASK) != 0)
113 return (0);
114
115 extsr = (*mii->mii_readreg)(parent, ma->mii_phyno, MII_EXTSR);
116 if (extsr & (EXTSR_1000TFDX|EXTSR_1000THDX))
117 return (0);
118
119 if (extsr & (EXTSR_1000XFDX|EXTSR_1000XHDX)) {
120 /*
121 * We think this is a generic TBI. Return a match
122 * priority higher than ukphy, but lower than what
123 * specific drivers will return.
124 */
125 return (2);
126 }
127
128 return (0);
129 }
130
131 void
gentbiattach(struct device * parent,struct device * self,void * aux)132 gentbiattach(struct device *parent, struct device *self, void *aux)
133 {
134 struct mii_softc *sc = (struct mii_softc *)self;
135 struct mii_attach_args *ma = aux;
136 struct mii_data *mii = ma->mii_data;
137
138 printf(": Generic ten-bit interface, rev. %d\n",
139 MII_REV(ma->mii_id2));
140
141 sc->mii_inst = mii->mii_instance;
142 sc->mii_phy = ma->mii_phyno;
143 sc->mii_funcs = &gentbi_funcs;
144 sc->mii_pdata = mii;
145 sc->mii_flags = ma->mii_flags;
146 sc->mii_anegticks = MII_ANEGTICKS;
147
148 PHY_RESET(sc);
149
150 /*
151 * Mask out all media in the BMSR. We only are really interested
152 * in "auto".
153 */
154 sc->mii_capabilities =
155 PHY_READ(sc, MII_BMSR) & ma->mii_capmask & ~BMSR_MEDIAMASK;
156 if (sc->mii_capabilities & BMSR_EXTSTAT)
157 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
158
159 if ((sc->mii_capabilities & BMSR_MEDIAMASK) ||
160 (sc->mii_extcapabilities & EXTSR_MEDIAMASK))
161 mii_phy_add_media(sc);
162 }
163
164 int
gentbi_service(struct mii_softc * sc,struct mii_data * mii,int cmd)165 gentbi_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
166 {
167 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
168 int reg;
169
170 switch (cmd) {
171 case MII_POLLSTAT:
172 /*
173 * If we're not polling our PHY instance, just return.
174 */
175 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
176 return (0);
177 break;
178
179 case MII_MEDIACHG:
180 /*
181 * If the media indicates a different PHY instance,
182 * isolate ourselves.
183 */
184 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
185 reg = PHY_READ(sc, MII_BMCR);
186 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
187 return (0);
188 }
189
190 /*
191 * If the interface is not up, don't do anything.
192 */
193 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
194 break;
195
196 mii_phy_setmedia(sc);
197 break;
198
199 case MII_TICK:
200 /*
201 * If we're not currently selected, just return.
202 */
203 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
204 return (0);
205
206 if (mii_phy_tick(sc) == EJUSTRETURN)
207 return (0);
208 break;
209
210 case MII_DOWN:
211 mii_phy_down(sc);
212 return (0);
213 }
214
215 /* Update the media status. */
216 mii_phy_status(sc);
217
218 /* Callback if something changed. */
219 mii_phy_update(sc, cmd);
220 return (0);
221 }
222
223 void
gentbi_status(struct mii_softc * sc)224 gentbi_status(struct mii_softc *sc)
225 {
226 struct mii_data *mii = sc->mii_pdata;
227 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
228 int bmsr, bmcr, anlpar;
229
230 mii->mii_media_status = IFM_AVALID;
231 mii->mii_media_active = IFM_ETHER;
232
233 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
234
235 if (bmsr & BMSR_LINK)
236 mii->mii_media_status |= IFM_ACTIVE;
237
238 bmcr = PHY_READ(sc, MII_BMCR);
239 if (bmcr & BMCR_ISO) {
240 mii->mii_media_active |= IFM_NONE;
241 mii->mii_media_status = 0;
242 return;
243 }
244
245 if (bmcr & BMCR_LOOP)
246 mii->mii_media_active |= IFM_LOOP;
247
248 if (bmcr & BMCR_AUTOEN) {
249 /*
250 * The media status bits are only valid if autonegotiation
251 * has completed (or it's disabled).
252 */
253 if ((bmsr & BMSR_ACOMP) == 0) {
254 /* Erg, still trying, I guess... */
255 mii->mii_media_active |= IFM_NONE;
256 return;
257 }
258
259 /*
260 * The media is always 1000baseSX. Check the ANLPAR to
261 * see if we're doing full-duplex.
262 */
263 mii->mii_media_active |= IFM_1000_SX;
264
265 anlpar = PHY_READ(sc, MII_ANLPAR);
266 if ((sc->mii_extcapabilities & EXTSR_1000XFDX) != 0 &&
267 (anlpar & ANLPAR_X_FD) != 0)
268 mii->mii_media_active |=
269 mii_phy_flowstatus(sc) | IFM_FDX;
270 } else
271 mii->mii_media_active = ife->ifm_media;
272 }
273