FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/bmtphy.c
1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-NetBSD
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 __FBSDID("$FreeBSD$");
62
63 /*
64 * Driver for the Broadcom BCM5201/BCM5202 "Mini-Theta" PHYs. This also
65 * drives the PHY on the 3Com 3c905C. The 3c905C's PHY is described in
66 * the 3c905C data sheet.
67 */
68
69 #include <sys/param.h>
70 #include <sys/systm.h>
71 #include <sys/kernel.h>
72 #include <sys/module.h>
73 #include <sys/socket.h>
74 #include <sys/bus.h>
75
76 #include <net/if.h>
77 #include <net/if_media.h>
78
79 #include <dev/mii/mii.h>
80 #include <dev/mii/miivar.h>
81 #include "miidevs.h"
82
83 #include <dev/mii/bmtphyreg.h>
84
85 #include "miibus_if.h"
86
87 static int bmtphy_probe(device_t);
88 static int bmtphy_attach(device_t);
89
90 static device_method_t bmtphy_methods[] = {
91 /* Device interface */
92 DEVMETHOD(device_probe, bmtphy_probe),
93 DEVMETHOD(device_attach, bmtphy_attach),
94 DEVMETHOD(device_detach, mii_phy_detach),
95 DEVMETHOD(device_shutdown, bus_generic_shutdown),
96 DEVMETHOD_END
97 };
98
99 static driver_t bmtphy_driver = {
100 "bmtphy",
101 bmtphy_methods,
102 sizeof(struct mii_softc)
103 };
104
105 DRIVER_MODULE(bmtphy, miibus, bmtphy_driver, 0, 0);
106
107 static int bmtphy_service(struct mii_softc *, struct mii_data *, int);
108 static void bmtphy_status(struct mii_softc *);
109 static void bmtphy_reset(struct mii_softc *);
110
111 static const struct mii_phydesc bmtphys_dp[] = {
112 MII_PHY_DESC(xxBROADCOM, BCM4401),
113 MII_PHY_DESC(xxBROADCOM, BCM5201),
114 MII_PHY_DESC(xxBROADCOM, BCM5214),
115 MII_PHY_DESC(xxBROADCOM, BCM5221),
116 MII_PHY_DESC(xxBROADCOM, BCM5222),
117 MII_PHY_END
118 };
119
120 static const struct mii_phydesc bmtphys_lp[] = {
121 MII_PHY_DESC(xxBROADCOM, 3C905B),
122 MII_PHY_DESC(xxBROADCOM, 3C905C),
123 MII_PHY_END
124 };
125
126 static const struct mii_phy_funcs bmtphy_funcs = {
127 bmtphy_service,
128 bmtphy_status,
129 bmtphy_reset
130 };
131
132 static int
133 bmtphy_probe(device_t dev)
134 {
135 int rval;
136
137 /* Let exphy(4) take precedence for these. */
138 rval = mii_phy_dev_probe(dev, bmtphys_lp, BUS_PROBE_LOW_PRIORITY);
139 if (rval <= 0)
140 return (rval);
141
142 return (mii_phy_dev_probe(dev, bmtphys_dp, BUS_PROBE_DEFAULT));
143 }
144
145 static int
146 bmtphy_attach(device_t dev)
147 {
148
149 mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &bmtphy_funcs, 1);
150 return (0);
151 }
152
153 static int
154 bmtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
155 {
156
157 switch (cmd) {
158 case MII_POLLSTAT:
159 break;
160
161 case MII_MEDIACHG:
162 mii_phy_setmedia(sc);
163 break;
164
165 case MII_TICK:
166 if (mii_phy_tick(sc) == EJUSTRETURN)
167 return (0);
168 break;
169 }
170
171 /* Update the media status. */
172 PHY_STATUS(sc);
173
174 /* Callback if something changed. */
175 mii_phy_update(sc, cmd);
176 return (0);
177 }
178
179 static void
180 bmtphy_status(struct mii_softc *sc)
181 {
182 struct mii_data *mii;
183 struct ifmedia_entry *ife;
184 int bmsr, bmcr, aux_csr;
185
186 mii = sc->mii_pdata;
187 ife = mii->mii_media.ifm_cur;
188
189 mii->mii_media_status = IFM_AVALID;
190 mii->mii_media_active = IFM_ETHER;
191
192 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
193
194 if (bmsr & BMSR_LINK)
195 mii->mii_media_status |= IFM_ACTIVE;
196
197 bmcr = PHY_READ(sc, MII_BMCR);
198 if (bmcr & BMCR_ISO) {
199 mii->mii_media_active |= IFM_NONE;
200 mii->mii_media_status = 0;
201 return;
202 }
203
204 if (bmcr & BMCR_LOOP)
205 mii->mii_media_active |= IFM_LOOP;
206
207 if (bmcr & BMCR_AUTOEN) {
208 /*
209 * The media status bits are only valid if autonegotiation
210 * has completed (or it's disabled).
211 */
212 if ((bmsr & BMSR_ACOMP) == 0) {
213 /* Erg, still trying, I guess... */
214 mii->mii_media_active |= IFM_NONE;
215 return;
216 }
217
218 aux_csr = PHY_READ(sc, MII_BMTPHY_AUX_CSR);
219 if (aux_csr & AUX_CSR_SPEED)
220 mii->mii_media_active |= IFM_100_TX;
221 else
222 mii->mii_media_active |= IFM_10_T;
223 if (aux_csr & AUX_CSR_FDX)
224 mii->mii_media_active |=
225 IFM_FDX | mii_phy_flowstatus(sc);
226 else
227 mii->mii_media_active |= IFM_HDX;
228 } else
229 mii->mii_media_active = ife->ifm_media;
230 }
231
232 static void
233 bmtphy_reset(struct mii_softc *sc)
234 {
235 u_int16_t data;
236
237 mii_phy_reset(sc);
238
239 if (sc->mii_mpd_model == MII_MODEL_xxBROADCOM_BCM5221) {
240 /* Enable shadow register mode. */
241 data = PHY_READ(sc, 0x1f);
242 PHY_WRITE(sc, 0x1f, data | 0x0080);
243
244 /* Enable APD (Auto PowerDetect). */
245 data = PHY_READ(sc, MII_BMTPHY_AUX2);
246 PHY_WRITE(sc, MII_BMTPHY_AUX2, data | 0x0020);
247
248 /* Enable clocks across APD for Auto-MDIX functionality. */
249 data = PHY_READ(sc, MII_BMTPHY_INTR);
250 PHY_WRITE(sc, MII_BMTPHY_INTR, data | 0x0004);
251
252 /* Disable shadow register mode. */
253 data = PHY_READ(sc, 0x1f);
254 PHY_WRITE(sc, 0x1f, data & ~0x0080);
255 }
256 }
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