1 /* $OpenBSD: bmtphy.c,v 1.22 2023/03/04 22:34:37 kettenis Exp $ */
2 /* $NetBSD: bmtphy.c,v 1.17 2005/01/17 13:17:45 scw Exp $ */
3 /*
4 * Copyright (c) 2001 Theo de Raadt
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 /*
20 * Driver for Broadcom BCM5201/BCM5202 "Mini-Theta" PHYs. This also
21 * drives the PHY on the 3Com 3c905C. The 3c905C's PHY is described in
22 * the 3c905C data sheet.
23 */
24
25 #include <sys/param.h>
26 #include <sys/systm.h>
27 #include <sys/device.h>
28 #include <sys/socket.h>
29 #include <sys/errno.h>
30
31 #include <net/if.h>
32 #include <net/if_var.h>
33 #include <net/if_media.h>
34
35 #include <dev/mii/mii.h>
36 #include <dev/mii/miivar.h>
37 #include <dev/mii/miidevs.h>
38
39 #include <dev/mii/bmtphyreg.h>
40
41 int bmtphymatch(struct device *, void *, void *);
42 void bmtphyattach(struct device *, struct device *, void *);
43
44 const struct cfattach bmtphy_ca = {
45 sizeof(struct mii_softc), bmtphymatch, bmtphyattach, mii_phy_detach
46 };
47
48 struct cfdriver bmtphy_cd = {
49 NULL, "bmtphy", DV_DULL
50 };
51
52 int bmtphy_service(struct mii_softc *, struct mii_data *, int);
53 void bmtphy_status(struct mii_softc *);
54 void bmtphy_reset(struct mii_softc *);
55
56 const struct mii_phy_funcs bmtphy_funcs = {
57 bmtphy_service, bmtphy_status, bmtphy_reset,
58 };
59
60 static const struct mii_phydesc bmtphys[] = {
61 { MII_OUI_BROADCOM, MII_MODEL_BROADCOM_3C905B,
62 MII_STR_BROADCOM_3C905B },
63 { MII_OUI_BROADCOM, MII_MODEL_BROADCOM_3C905C,
64 MII_STR_BROADCOM_3C905C },
65 { MII_OUI_BROADCOM, MII_MODEL_BROADCOM_BCM4401,
66 MII_STR_BROADCOM_BCM4401 },
67 { MII_OUI_BROADCOM, MII_MODEL_BROADCOM_BCM5201,
68 MII_STR_BROADCOM_BCM5201 },
69 { MII_OUI_BROADCOM, MII_MODEL_BROADCOM_BCM5214,
70 MII_STR_BROADCOM_BCM5214 },
71 { MII_OUI_BROADCOM, MII_MODEL_BROADCOM_BCM5220,
72 MII_STR_BROADCOM_BCM5220 },
73 { MII_OUI_BROADCOM, MII_MODEL_BROADCOM_BCM5221,
74 MII_STR_BROADCOM_BCM5221 },
75 { MII_OUI_BROADCOM, MII_MODEL_BROADCOM_BCM5222,
76 MII_STR_BROADCOM_BCM5222 },
77
78 { 0, 0,
79 NULL },
80 };
81
82 int
bmtphymatch(struct device * parent,void * match,void * aux)83 bmtphymatch(struct device *parent, void *match, void *aux)
84 {
85 struct mii_attach_args *ma = aux;
86
87 if (mii_phy_match(ma, bmtphys) != NULL)
88 return (10);
89
90 return (0);
91 }
92
93 void
bmtphyattach(struct device * parent,struct device * self,void * aux)94 bmtphyattach(struct device *parent, struct device *self, void *aux)
95 {
96 struct mii_softc *sc = (struct mii_softc *)self;
97 struct mii_attach_args *ma = aux;
98 struct mii_data *mii = ma->mii_data;
99 const struct mii_phydesc *mpd;
100
101 mpd = mii_phy_match(ma, bmtphys);
102 printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
103
104 sc->mii_model = MII_MODEL(ma->mii_id2);
105 sc->mii_inst = mii->mii_instance;
106 sc->mii_phy = ma->mii_phyno;
107 sc->mii_funcs = &bmtphy_funcs;
108 sc->mii_pdata = mii;
109 sc->mii_flags = ma->mii_flags;
110 sc->mii_anegticks = MII_ANEGTICKS;
111
112 PHY_RESET(sc);
113
114 /*
115 * XXX Check AUX_STS_FX_MODE to set MIIF_HAVE_FIBER?
116 */
117
118 sc->mii_capabilities =
119 PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
120 if (sc->mii_capabilities & BMSR_MEDIAMASK)
121 mii_phy_add_media(sc);
122 }
123
124 int
bmtphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)125 bmtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
126 {
127 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
128 int reg;
129
130 if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
131 return (ENXIO);
132
133 switch (cmd) {
134 case MII_POLLSTAT:
135 /*
136 * If we're not polling our PHY instance, just return.
137 */
138 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
139 return (0);
140 break;
141
142 case MII_MEDIACHG:
143 /*
144 * If the media indicates a different PHY instance,
145 * isolate ourselves.
146 */
147 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
148 reg = PHY_READ(sc, MII_BMCR);
149 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
150 return (0);
151 }
152
153 /*
154 * If the interface is not up, don't do anything.
155 */
156 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
157 break;
158
159 mii_phy_setmedia(sc);
160 break;
161
162 case MII_TICK:
163 /*
164 * If we're not currently selected, just return.
165 */
166 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
167 return (0);
168
169 if (mii_phy_tick(sc) == EJUSTRETURN)
170 return (0);
171 break;
172
173 case MII_DOWN:
174 mii_phy_down(sc);
175 return (0);
176 }
177
178 /* Update the media status. */
179 mii_phy_status(sc);
180
181 /* Callback if something changed. */
182 mii_phy_update(sc, cmd);
183 return (0);
184 }
185
186 void
bmtphy_status(struct mii_softc * sc)187 bmtphy_status(struct mii_softc *sc)
188 {
189 struct mii_data *mii = sc->mii_pdata;
190 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
191 int bmsr, bmcr, aux_csr;
192
193 mii->mii_media_status = IFM_AVALID;
194 mii->mii_media_active = IFM_ETHER;
195
196 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
197 if (bmsr & BMSR_LINK)
198 mii->mii_media_status |= IFM_ACTIVE;
199
200 bmcr = PHY_READ(sc, MII_BMCR);
201 if (bmcr & BMCR_ISO) {
202 mii->mii_media_active |= IFM_NONE;
203 mii->mii_media_status = 0;
204 return;
205 }
206
207 if (bmcr & BMCR_LOOP)
208 mii->mii_media_active |= IFM_LOOP;
209
210 if (bmcr & BMCR_AUTOEN) {
211 /*
212 * The later are only valid if autonegotiation
213 * has completed (or it's disabled).
214 */
215 if ((bmsr & BMSR_ACOMP) == 0) {
216 /* Erg, still trying, I guess... */
217 mii->mii_media_active |= IFM_NONE;
218 return;
219 }
220
221 aux_csr = PHY_READ(sc, MII_BMTPHY_AUX_CSR);
222 if (aux_csr & AUX_CSR_SPEED)
223 mii->mii_media_active |= IFM_100_TX;
224 else
225 mii->mii_media_active |= IFM_10_T;
226
227 if (aux_csr & AUX_CSR_FDX)
228 mii->mii_media_active |= mii_phy_flowstatus(sc) | IFM_FDX;
229 else
230 mii->mii_media_active |= IFM_HDX;
231 } else
232 mii->mii_media_active = ife->ifm_media;
233 }
234
235 void
bmtphy_reset(struct mii_softc * sc)236 bmtphy_reset(struct mii_softc *sc)
237 {
238 u_int16_t data;
239
240 mii_phy_reset(sc);
241
242 if (sc->mii_model == MII_MODEL_BROADCOM_BCM5221) {
243 /* Enable shadow register mode */
244 data = PHY_READ(sc, 0x1f);
245 PHY_WRITE(sc, 0x1f, data | 0x0080);
246
247 /* Enable APD (Auto PowerDetect) */
248 data = PHY_READ(sc, MII_BMTPHY_AUX2);
249 PHY_WRITE(sc, MII_BMTPHY_AUX2, data | 0x0020);
250
251 /* Enable clocks across APD for
252 * Auto-MDIX functionality */
253 data = PHY_READ(sc, MII_BMTPHY_INTR);
254 PHY_WRITE(sc, MII_BMTPHY_INTR, data | 0x0004);
255
256 /* Disable shadow register mode */
257 data = PHY_READ(sc, 0x1f);
258 PHY_WRITE(sc, 0x1f, data & ~0x0080);
259 }
260 }
261