1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2006 Benno Rice. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 /*
29 * Driver for the SEEQ 80220 and 84220.
30 * (Originally developed for the internal PHY on the SMSC LAN91C111.)
31 */
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/kernel.h>
36 #include <sys/socket.h>
37 #include <sys/errno.h>
38 #include <sys/module.h>
39 #include <sys/bus.h>
40 #include <sys/malloc.h>
41
42 #include <machine/bus.h>
43
44 #include <net/if.h>
45 #include <net/if_media.h>
46
47 #include <dev/mii/mii.h>
48 #include <dev/mii/miivar.h>
49 #include "miidevs.h"
50
51 #include "miibus_if.h"
52
53 static int smcphy_probe(device_t);
54 static int smcphy_attach(device_t);
55
56 static int smcphy_service(struct mii_softc *, struct mii_data *, int);
57 static void smcphy_reset(struct mii_softc *);
58 static void smcphy_auto(struct mii_softc *, int);
59 static void smcphy_status(struct mii_softc *);
60
61 static device_method_t smcphy_methods[] = {
62 /* device interface */
63 DEVMETHOD(device_probe, smcphy_probe),
64 DEVMETHOD(device_attach, smcphy_attach),
65 DEVMETHOD(device_detach, mii_phy_detach),
66 DEVMETHOD(device_shutdown, bus_generic_shutdown),
67 DEVMETHOD_END
68 };
69
70 static driver_t smcphy_driver = {
71 "smcphy",
72 smcphy_methods,
73 sizeof(struct mii_softc)
74 };
75
76 DRIVER_MODULE(smcphy, miibus, smcphy_driver, 0, 0);
77
78 static const struct mii_phydesc smcphys[] = {
79 MII_PHY_DESC(SEEQ, 80220),
80 MII_PHY_DESC(SEEQ, 84220),
81 MII_PHY_END
82 };
83
84 static const struct mii_phy_funcs smcphy80220_funcs = {
85 smcphy_service,
86 smcphy_status,
87 mii_phy_reset
88 };
89
90 static const struct mii_phy_funcs smcphy_funcs = {
91 smcphy_service,
92 smcphy_status,
93 smcphy_reset
94 };
95
96 static int
smcphy_probe(device_t dev)97 smcphy_probe(device_t dev)
98 {
99
100 return (mii_phy_dev_probe(dev, smcphys, BUS_PROBE_DEFAULT));
101 }
102
103 static int
smcphy_attach(device_t dev)104 smcphy_attach(device_t dev)
105 {
106 struct mii_softc *sc;
107 struct mii_attach_args *ma;
108 const struct mii_phy_funcs *mpf;
109
110 sc = device_get_softc(dev);
111 ma = device_get_ivars(dev);
112 if (MII_MODEL(ma->mii_id2) == MII_MODEL_SEEQ_80220)
113 mpf = &smcphy80220_funcs;
114 else
115 mpf = &smcphy_funcs;
116 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, mpf, 1);
117 mii_phy_setmedia(sc);
118
119 return (0);
120 }
121
122 static int
smcphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)123 smcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
124 {
125 struct ifmedia_entry *ife;
126 int reg;
127
128 ife = mii->mii_media.ifm_cur;
129
130 switch (cmd) {
131 case MII_POLLSTAT:
132 break;
133
134 case MII_MEDIACHG:
135 switch (IFM_SUBTYPE(ife->ifm_media)) {
136 case IFM_AUTO:
137 smcphy_auto(sc, ife->ifm_media);
138 break;
139
140 default:
141 mii_phy_setmedia(sc);
142 break;
143 }
144
145 break;
146
147 case MII_TICK:
148 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
149 break;
150 }
151
152 /* I have no idea why BMCR_ISO gets set. */
153 reg = PHY_READ(sc, MII_BMCR);
154 if (reg & BMCR_ISO) {
155 PHY_WRITE(sc, MII_BMCR, reg & ~BMCR_ISO);
156 }
157
158 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
159 if (reg & BMSR_LINK) {
160 sc->mii_ticks = 0;
161 break;
162 }
163
164 if (++sc->mii_ticks <= MII_ANEGTICKS) {
165 break;
166 }
167
168 sc->mii_ticks = 0;
169 PHY_RESET(sc);
170 smcphy_auto(sc, ife->ifm_media);
171 break;
172 }
173
174 /* Update the media status. */
175 PHY_STATUS(sc);
176
177 /* Callback if something changed. */
178 mii_phy_update(sc, cmd);
179 return (0);
180 }
181
182 static void
smcphy_reset(struct mii_softc * sc)183 smcphy_reset(struct mii_softc *sc)
184 {
185 u_int bmcr;
186 int timeout;
187
188 PHY_WRITE(sc, MII_BMCR, BMCR_RESET);
189
190 for (timeout = 2; timeout > 0; timeout--) {
191 DELAY(50000);
192 bmcr = PHY_READ(sc, MII_BMCR);
193 if ((bmcr & BMCR_RESET) == 0)
194 break;
195 }
196
197 if (bmcr & BMCR_RESET)
198 device_printf(sc->mii_dev, "reset failed\n");
199
200 PHY_WRITE(sc, MII_BMCR, 0x3000);
201
202 /* Mask interrupts, we poll instead. */
203 PHY_WRITE(sc, 0x1e, 0xffc0);
204 }
205
206 static void
smcphy_auto(struct mii_softc * sc,int media)207 smcphy_auto(struct mii_softc *sc, int media)
208 {
209 uint16_t anar;
210
211 anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA;
212 if ((media & IFM_FLOW) != 0 || (sc->mii_flags & MIIF_FORCEPAUSE) != 0)
213 anar |= ANAR_FC;
214 PHY_WRITE(sc, MII_ANAR, anar);
215 /* Apparently this helps. */
216 anar = PHY_READ(sc, MII_ANAR);
217 PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
218 }
219
220 static void
smcphy_status(struct mii_softc * sc)221 smcphy_status(struct mii_softc *sc)
222 {
223 struct mii_data *mii;
224 uint32_t bmcr, bmsr, status;
225
226 mii = sc->mii_pdata;
227 mii->mii_media_status = IFM_AVALID;
228 mii->mii_media_active = IFM_ETHER;
229
230 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
231 if ((bmsr & BMSR_LINK) != 0)
232 mii->mii_media_status |= IFM_ACTIVE;
233
234 bmcr = PHY_READ(sc, MII_BMCR);
235 if ((bmcr & BMCR_ISO) != 0) {
236 mii->mii_media_active |= IFM_NONE;
237 mii->mii_media_status = 0;
238 return;
239 }
240
241 if ((bmcr & BMCR_LOOP) != 0)
242 mii->mii_media_active |= IFM_LOOP;
243
244 if ((bmcr & BMCR_AUTOEN) != 0) {
245 if ((bmsr & BMSR_ACOMP) == 0) {
246 /* Erg, still trying, I guess... */
247 mii->mii_media_active |= IFM_NONE;
248 return;
249 }
250 }
251
252 status = PHY_READ(sc, 0x12);
253 if (status & 0x0080)
254 mii->mii_media_active |= IFM_100_TX;
255 else
256 mii->mii_media_active |= IFM_10_T;
257 if (status & 0x0040)
258 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc);
259 else
260 mii->mii_media_active |= IFM_HDX;
261 }
262