1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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 * from: NetBSD: bmtphy.c,v 1.8 2002/07/03 06:25:50 simonb Exp
57 *
58 */
59
60 #include <sys/cdefs.h>
61 /*
62 * Driver for the Broadcom BCM5201/BCM5202 "Mini-Theta" PHYs. This also
63 * drives the PHY on the 3Com 3c905C. The 3c905C's PHY is described in
64 * the 3c905C data sheet.
65 */
66
67 #include <sys/param.h>
68 #include <sys/systm.h>
69 #include <sys/kernel.h>
70 #include <sys/module.h>
71 #include <sys/socket.h>
72 #include <sys/bus.h>
73
74 #include <net/if.h>
75 #include <net/if_media.h>
76
77 #include <dev/mii/mii.h>
78 #include <dev/mii/miivar.h>
79 #include "miidevs.h"
80
81 #include <dev/mii/bmtphyreg.h>
82
83 #include "miibus_if.h"
84
85 static int bmtphy_probe(device_t);
86 static int bmtphy_attach(device_t);
87
88 static device_method_t bmtphy_methods[] = {
89 /* Device interface */
90 DEVMETHOD(device_probe, bmtphy_probe),
91 DEVMETHOD(device_attach, bmtphy_attach),
92 DEVMETHOD(device_detach, mii_phy_detach),
93 DEVMETHOD(device_shutdown, bus_generic_shutdown),
94 DEVMETHOD_END
95 };
96
97 static driver_t bmtphy_driver = {
98 "bmtphy",
99 bmtphy_methods,
100 sizeof(struct mii_softc)
101 };
102
103 DRIVER_MODULE(bmtphy, miibus, bmtphy_driver, 0, 0);
104
105 static int bmtphy_service(struct mii_softc *, struct mii_data *, int);
106 static void bmtphy_status(struct mii_softc *);
107 static void bmtphy_reset(struct mii_softc *);
108
109 static const struct mii_phydesc bmtphys_dp[] = {
110 MII_PHY_DESC(xxBROADCOM, BCM4401),
111 MII_PHY_DESC(xxBROADCOM, BCM5201),
112 MII_PHY_DESC(xxBROADCOM, BCM5214),
113 MII_PHY_DESC(xxBROADCOM, BCM5221),
114 MII_PHY_DESC(xxBROADCOM, BCM5222),
115 MII_PHY_END
116 };
117
118 static const struct mii_phydesc bmtphys_lp[] = {
119 MII_PHY_DESC(xxBROADCOM, 3C905B),
120 MII_PHY_DESC(xxBROADCOM, 3C905C),
121 MII_PHY_END
122 };
123
124 static const struct mii_phy_funcs bmtphy_funcs = {
125 bmtphy_service,
126 bmtphy_status,
127 bmtphy_reset
128 };
129
130 static int
bmtphy_probe(device_t dev)131 bmtphy_probe(device_t dev)
132 {
133 int rval;
134
135 /* Let exphy(4) take precedence for these. */
136 rval = mii_phy_dev_probe(dev, bmtphys_lp, BUS_PROBE_LOW_PRIORITY);
137 if (rval <= 0)
138 return (rval);
139
140 return (mii_phy_dev_probe(dev, bmtphys_dp, BUS_PROBE_DEFAULT));
141 }
142
143 static int
bmtphy_attach(device_t dev)144 bmtphy_attach(device_t dev)
145 {
146
147 mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &bmtphy_funcs, 1);
148 return (0);
149 }
150
151 static int
bmtphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)152 bmtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
153 {
154
155 switch (cmd) {
156 case MII_POLLSTAT:
157 break;
158
159 case MII_MEDIACHG:
160 mii_phy_setmedia(sc);
161 break;
162
163 case MII_TICK:
164 if (mii_phy_tick(sc) == EJUSTRETURN)
165 return (0);
166 break;
167 }
168
169 /* Update the media status. */
170 PHY_STATUS(sc);
171
172 /* Callback if something changed. */
173 mii_phy_update(sc, cmd);
174 return (0);
175 }
176
177 static void
bmtphy_status(struct mii_softc * sc)178 bmtphy_status(struct mii_softc *sc)
179 {
180 struct mii_data *mii;
181 struct ifmedia_entry *ife;
182 int bmsr, bmcr, aux_csr;
183
184 mii = sc->mii_pdata;
185 ife = mii->mii_media.ifm_cur;
186
187 mii->mii_media_status = IFM_AVALID;
188 mii->mii_media_active = IFM_ETHER;
189
190 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
191
192 if (bmsr & BMSR_LINK)
193 mii->mii_media_status |= IFM_ACTIVE;
194
195 bmcr = PHY_READ(sc, MII_BMCR);
196 if (bmcr & BMCR_ISO) {
197 mii->mii_media_active |= IFM_NONE;
198 mii->mii_media_status = 0;
199 return;
200 }
201
202 if (bmcr & BMCR_LOOP)
203 mii->mii_media_active |= IFM_LOOP;
204
205 if (bmcr & BMCR_AUTOEN) {
206 /*
207 * The media status bits are only valid if autonegotiation
208 * has completed (or it's disabled).
209 */
210 if ((bmsr & BMSR_ACOMP) == 0) {
211 /* Erg, still trying, I guess... */
212 mii->mii_media_active |= IFM_NONE;
213 return;
214 }
215
216 aux_csr = PHY_READ(sc, MII_BMTPHY_AUX_CSR);
217 if (aux_csr & AUX_CSR_SPEED)
218 mii->mii_media_active |= IFM_100_TX;
219 else
220 mii->mii_media_active |= IFM_10_T;
221 if (aux_csr & AUX_CSR_FDX)
222 mii->mii_media_active |=
223 IFM_FDX | mii_phy_flowstatus(sc);
224 else
225 mii->mii_media_active |= IFM_HDX;
226 } else
227 mii->mii_media_active = ife->ifm_media;
228 }
229
230 static void
bmtphy_reset(struct mii_softc * sc)231 bmtphy_reset(struct mii_softc *sc)
232 {
233 u_int16_t data;
234
235 mii_phy_reset(sc);
236
237 if (sc->mii_mpd_model == MII_MODEL_xxBROADCOM_BCM5221) {
238 /* Enable shadow register mode. */
239 data = PHY_READ(sc, 0x1f);
240 PHY_WRITE(sc, 0x1f, data | 0x0080);
241
242 /* Enable APD (Auto PowerDetect). */
243 data = PHY_READ(sc, MII_BMTPHY_AUX2);
244 PHY_WRITE(sc, MII_BMTPHY_AUX2, data | 0x0020);
245
246 /* Enable clocks across APD for Auto-MDIX functionality. */
247 data = PHY_READ(sc, MII_BMTPHY_INTR);
248 PHY_WRITE(sc, MII_BMTPHY_INTR, data | 0x0004);
249
250 /* Disable shadow register mode. */
251 data = PHY_READ(sc, 0x1f);
252 PHY_WRITE(sc, 0x1f, data & ~0x0080);
253 }
254 }
255