1 /* $NetBSD: bmtphy.c,v 1.32 2016/07/07 06:55:41 msaitoh 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 Broadcom BCM5201/BCM5202 "Mini-Theta" PHYs. This also
59 * drives the PHY on the 3Com 3c905C. The 3c905C's PHY is described in
60 * the 3c905C data sheet.
61 */
62
63 #include <sys/cdefs.h>
64 __KERNEL_RCSID(0, "$NetBSD: bmtphy.c,v 1.32 2016/07/07 06:55:41 msaitoh Exp $");
65
66 #include <sys/param.h>
67 #include <sys/systm.h>
68 #include <sys/kernel.h>
69 #include <sys/device.h>
70 #include <sys/socket.h>
71 #include <sys/errno.h>
72
73 #include <net/if.h>
74 #include <net/if_media.h>
75
76 #include <dev/mii/mii.h>
77 #include <dev/mii/miivar.h>
78 #include <dev/mii/miidevs.h>
79
80 #include <dev/mii/bmtphyreg.h>
81
82 static int bmtphymatch(device_t, cfdata_t, void *);
83 static void bmtphyattach(device_t, device_t, void *);
84
85 CFATTACH_DECL_NEW(bmtphy, sizeof(struct mii_softc),
86 bmtphymatch, bmtphyattach, mii_phy_detach, mii_phy_activate);
87
88 static int bmtphy_service(struct mii_softc *, struct mii_data *, int);
89 static void bmtphy_status(struct mii_softc *);
90 static void bmtphy_reset(struct mii_softc *);
91
92 static const struct mii_phy_funcs bmtphy_funcs = {
93 bmtphy_service, bmtphy_status, bmtphy_reset,
94 };
95
96 static const struct mii_phydesc bmtphys[] = {
97 { MII_OUI_xxBROADCOM, MII_MODEL_xxBROADCOM_3C905B,
98 MII_STR_xxBROADCOM_3C905B },
99 { MII_OUI_xxBROADCOM, MII_MODEL_xxBROADCOM_3C905C,
100 MII_STR_xxBROADCOM_3C905C },
101 { MII_OUI_xxBROADCOM, MII_MODEL_xxBROADCOM_BCM5201,
102 MII_STR_xxBROADCOM_BCM5201 },
103 { MII_OUI_xxBROADCOM, MII_MODEL_xxBROADCOM_BCM5214,
104 MII_STR_xxBROADCOM_BCM5214 },
105 { MII_OUI_xxBROADCOM, MII_MODEL_xxBROADCOM_BCM5221,
106 MII_STR_xxBROADCOM_BCM5221 },
107 { MII_OUI_xxBROADCOM, MII_MODEL_xxBROADCOM_BCM5222,
108 MII_STR_xxBROADCOM_BCM5222 },
109 { MII_OUI_xxBROADCOM, MII_MODEL_xxBROADCOM_BCM4401,
110 MII_STR_xxBROADCOM_BCM4401 },
111
112 { 0, 0,
113 NULL },
114 };
115
116 static int
bmtphymatch(device_t parent,cfdata_t match,void * aux)117 bmtphymatch(device_t parent, cfdata_t match, void *aux)
118 {
119 struct mii_attach_args *ma = aux;
120
121 if (mii_phy_match(ma, bmtphys) != NULL)
122 return (10);
123
124 return (0);
125 }
126
127 static void
bmtphyattach(device_t parent,device_t self,void * aux)128 bmtphyattach(device_t parent, device_t self, void *aux)
129 {
130 struct mii_softc *sc = device_private(self);
131 struct mii_attach_args *ma = aux;
132 struct mii_data *mii = ma->mii_data;
133 const struct mii_phydesc *mpd;
134
135 mpd = mii_phy_match(ma, bmtphys);
136 aprint_naive(": Media interface\n");
137 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
138
139 sc->mii_dev = self;
140 sc->mii_mpd_model = MII_MODEL(ma->mii_id2);
141 sc->mii_inst = mii->mii_instance;
142 sc->mii_phy = ma->mii_phyno;
143 sc->mii_funcs = &bmtphy_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 * XXX Check AUX_STS_FX_MODE to set MIIF_HAVE_FIBER?
152 */
153
154 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
155 aprint_normal_dev(self, "");
156 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
157 aprint_error("no media present");
158 else
159 mii_phy_add_media(sc);
160 aprint_normal("\n");
161 }
162
163 static int
bmtphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)164 bmtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
165 {
166 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
167 int reg;
168
169 switch (cmd) {
170 case MII_POLLSTAT:
171 /*
172 * If we're not polling our PHY instance, just return.
173 */
174 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
175 return (0);
176 break;
177
178 case MII_MEDIACHG:
179 /*
180 * If the media indicates a different PHY instance,
181 * isolate ourselves.
182 */
183 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
184 reg = PHY_READ(sc, MII_BMCR);
185 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
186 return (0);
187 }
188
189 /*
190 * If the interface is not up, don't do anything.
191 */
192 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
193 break;
194
195 mii_phy_setmedia(sc);
196 break;
197
198 case MII_TICK:
199 /*
200 * If we're not currently selected, just return.
201 */
202 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
203 return (0);
204
205 if (mii_phy_tick(sc) == EJUSTRETURN)
206 return (0);
207 break;
208
209 case MII_DOWN:
210 mii_phy_down(sc);
211 return (0);
212 }
213
214 /* Update the media status. */
215 mii_phy_status(sc);
216
217 /* Callback if something changed. */
218 mii_phy_update(sc, cmd);
219 return (0);
220 }
221
222 static void
bmtphy_status(struct mii_softc * sc)223 bmtphy_status(struct mii_softc *sc)
224 {
225 struct mii_data *mii = sc->mii_pdata;
226 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
227 int bmsr, bmcr, aux_csr;
228
229 mii->mii_media_status = IFM_AVALID;
230 mii->mii_media_active = IFM_ETHER;
231
232 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
233
234 if (bmsr & BMSR_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 /*
249 * The media status bits are only valid if autonegotiation
250 * has completed (or it's disabled).
251 */
252 if ((bmsr & BMSR_ACOMP) == 0) {
253 /* Erg, still trying, I guess... */
254 mii->mii_media_active |= IFM_NONE;
255 return;
256 }
257
258 aux_csr = PHY_READ(sc, MII_BMTPHY_AUX_CSR);
259 if (aux_csr & AUX_CSR_SPEED)
260 mii->mii_media_active |= IFM_100_TX;
261 else
262 mii->mii_media_active |= IFM_10_T;
263 if (aux_csr & AUX_CSR_FDX)
264 mii->mii_media_active |= IFM_FDX;
265 else
266 mii->mii_media_active |= IFM_HDX;
267
268 if (mii->mii_media_active & IFM_FDX)
269 mii->mii_media_active |= mii_phy_flowstatus(sc);
270 } else
271 mii->mii_media_active = ife->ifm_media;
272 }
273
274 static void
bmtphy_reset(struct mii_softc * sc)275 bmtphy_reset(struct mii_softc *sc)
276 {
277 u_int16_t data;
278
279 mii_phy_reset(sc);
280
281 if (sc->mii_mpd_model == MII_MODEL_xxBROADCOM_BCM5221) {
282 /* Enable shadow register mode */
283 data = PHY_READ(sc, 0x1f);
284 PHY_WRITE(sc, 0x1f, data | 0x0080);
285
286 /* Enable APD (Auto PowerDetect) */
287 data = PHY_READ(sc, MII_BMTPHY_AUX2);
288 PHY_WRITE(sc, MII_BMTPHY_AUX2, data | 0x0020);
289
290 /* Enable clocks across APD for Auto-MDIX functionality */
291 data = PHY_READ(sc, MII_BMTPHY_INTR);
292 PHY_WRITE(sc, MII_BMTPHY_INTR, data | 0x0004);
293
294 /* Disable shadow register mode */
295 data = PHY_READ(sc, 0x1f);
296 PHY_WRITE(sc, 0x1f, data & ~0x0080);
297 }
298 }
299