1 /* $OpenBSD: lxtphy.c,v 1.23 2022/04/06 18:59:29 naddy Exp $ */
2 /* $NetBSD: lxtphy.c,v 1.19 2000/02/02 23:34:57 thorpej Exp $ */
3
4 /*-
5 * Copyright (c) 1998, 1999 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 Level One's LXT-970/971 ethernet 10/100 PHY
60 * datasheet from www.level1.com
61 */
62
63 #include <sys/param.h>
64 #include <sys/systm.h>
65 #include <sys/device.h>
66 #include <sys/socket.h>
67 #include <sys/errno.h>
68
69 #include <net/if.h>
70 #include <net/if_var.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/lxtphyreg.h>
78
79 int lxtphymatch(struct device *, void *, void *);
80 void lxtphyattach(struct device *, struct device *, void *);
81
82 const struct cfattach lxtphy_ca = {
83 sizeof(struct mii_softc), lxtphymatch, lxtphyattach, mii_phy_detach
84 };
85
86 struct cfdriver lxtphy_cd = {
87 NULL, "lxtphy", DV_DULL
88 };
89
90 int lxtphy_service(struct mii_softc *, struct mii_data *, int);
91 void lxtphy_status(struct mii_softc *);
92 void lxtphy_reset(struct mii_softc *);
93
94 const struct mii_phy_funcs lxtphy_funcs = {
95 lxtphy_service, lxtphy_status, lxtphy_reset,
96 };
97
98 const struct mii_phy_funcs lxtphy971_funcs = {
99 lxtphy_service, ukphy_status, lxtphy_reset,
100 };
101
102 static const struct mii_phydesc lxtphys[] = {
103 { MII_OUI_xxLEVEL1, MII_MODEL_xxLEVEL1_LXT970,
104 MII_STR_xxLEVEL1_LXT970 },
105 { MII_OUI_xxLEVEL1a, MII_MODEL_xxLEVEL1a_LXT971,
106 MII_STR_xxLEVEL1a_LXT971 },
107
108 { 0, 0,
109 NULL },
110 };
111
112 int
lxtphymatch(struct device * parent,void * match,void * aux)113 lxtphymatch(struct device *parent, void *match, void *aux)
114 {
115 struct mii_attach_args *ma = aux;
116
117 if (mii_phy_match(ma, lxtphys) != NULL)
118 return (10);
119
120 return (0);
121 }
122
123 void
lxtphyattach(struct device * parent,struct device * self,void * aux)124 lxtphyattach(struct device *parent, struct device *self, void *aux)
125 {
126 struct mii_softc *sc = (struct mii_softc *)self;
127 struct mii_attach_args *ma = aux;
128 struct mii_data *mii = ma->mii_data;
129 const struct mii_phydesc *mpd;
130
131 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxLEVEL1 &&
132 MII_MODEL(ma->mii_id2) == MII_MODEL_xxLEVEL1_LXT970) {
133 sc->mii_funcs = &lxtphy_funcs;
134 }
135 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxLEVEL1a &&
136 MII_MODEL(ma->mii_id2) == MII_MODEL_xxLEVEL1a_LXT971) {
137 sc->mii_funcs = &lxtphy971_funcs;
138 }
139
140 mpd = mii_phy_match(ma, lxtphys);
141 printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
142
143 sc->mii_inst = mii->mii_instance;
144 sc->mii_phy = ma->mii_phyno;
145 sc->mii_pdata = mii;
146 sc->mii_flags = ma->mii_flags;
147
148 PHY_RESET(sc);
149
150 sc->mii_capabilities =
151 PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
152 if (sc->mii_capabilities & BMSR_MEDIAMASK)
153 mii_phy_add_media(sc);
154 }
155
156 int
lxtphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)157 lxtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
158 {
159 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
160 int reg;
161
162 if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
163 return (ENXIO);
164
165 switch (cmd) {
166 case MII_POLLSTAT:
167 /*
168 * If we're not polling our PHY instance, just return.
169 */
170 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
171 return (0);
172 break;
173
174 case MII_MEDIACHG:
175 /*
176 * If the media indicates a different PHY instance,
177 * isolate ourselves.
178 */
179 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
180 reg = PHY_READ(sc, MII_BMCR);
181 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
182 return (0);
183 }
184
185 /*
186 * If the interface is not up, don't do anything.
187 */
188 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
189 break;
190
191 mii_phy_setmedia(sc);
192 break;
193
194 case MII_TICK:
195 /*
196 * If we're not currently selected, just return.
197 */
198 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
199 return (0);
200
201 if (mii_phy_tick(sc) == EJUSTRETURN)
202 return (0);
203 break;
204
205 case MII_DOWN:
206 mii_phy_down(sc);
207 return (0);
208 }
209
210 /* Update the media status. */
211 mii_phy_status(sc);
212
213 /* Callback if something changed. */
214 mii_phy_update(sc, cmd);
215 return (0);
216 }
217
218 void
lxtphy_status(struct mii_softc * sc)219 lxtphy_status(struct mii_softc *sc)
220 {
221 struct mii_data *mii = sc->mii_pdata;
222 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
223 int bmcr, bmsr, csr;
224
225 mii->mii_media_status = IFM_AVALID;
226 mii->mii_media_active = IFM_ETHER;
227
228 /*
229 * Get link status from the CSR; we need to read the CSR
230 * for media type anyhow, and the link status in the CSR
231 * doesn't latch, so fewer register reads are required.
232 */
233 csr = PHY_READ(sc, MII_LXTPHY_CSR);
234 if (csr & CSR_LINK)
235 mii->mii_media_status |= IFM_ACTIVE;
236
237 bmcr = PHY_READ(sc, MII_BMCR);
238 if (bmcr & BMCR_ISO) {
239 mii->mii_media_active |= IFM_NONE;
240 mii->mii_media_status = 0;
241 return;
242 }
243
244 if (bmcr & BMCR_LOOP)
245 mii->mii_media_active |= IFM_LOOP;
246
247 if (bmcr & BMCR_AUTOEN) {
248 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
249 if ((bmsr & BMSR_ACOMP) == 0) {
250 /* Erg, still trying, I guess... */
251 mii->mii_media_active |= IFM_NONE;
252 return;
253 }
254 if (csr & CSR_SPEED)
255 mii->mii_media_active |= IFM_100_TX;
256 else
257 mii->mii_media_active |= IFM_10_T;
258
259 if (csr & CSR_DUPLEX)
260 mii->mii_media_active |= IFM_FDX;
261 else
262 mii->mii_media_active |= IFM_HDX;
263 } else
264 mii->mii_media_active = ife->ifm_media;
265 }
266
267 void
lxtphy_reset(struct mii_softc * sc)268 lxtphy_reset(struct mii_softc *sc)
269 {
270 mii_phy_reset(sc);
271 PHY_WRITE(sc, MII_LXTPHY_IER,
272 PHY_READ(sc, MII_LXTPHY_IER) & ~IER_INTEN);
273 }
274