1 /*-
2 * Copyright (c) 2006 Benno Rice. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25 #include <sys/cdefs.h>
26 __FBSDID("$FreeBSD$");
27
28 /*
29 * Driver for the SMSC LAN8710A
30 */
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/socket.h>
36 #include <sys/errno.h>
37 #include <sys/module.h>
38 #include <sys/bus.h>
39 #include <sys/malloc.h>
40
41 #include <machine/bus.h>
42
43 #include <net/if.h>
44 #include <net/if_media.h>
45
46 #include <dev/mii/mii.h>
47 #include <dev/mii/miivar.h>
48 #include "miidevs.h"
49
50 #include "miibus_if.h"
51
52 static int smscphy_probe(device_t);
53 static int smscphy_attach(device_t);
54
55 static int smscphy_service(struct mii_softc *, struct mii_data *, int);
56 static void smscphy_auto(struct mii_softc *, int);
57 static void smscphy_status(struct mii_softc *);
58
59 static device_method_t smscphy_methods[] = {
60 /* device interface */
61 DEVMETHOD(device_probe, smscphy_probe),
62 DEVMETHOD(device_attach, smscphy_attach),
63 DEVMETHOD(device_detach, mii_phy_detach),
64 DEVMETHOD(device_shutdown, bus_generic_shutdown),
65 DEVMETHOD_END
66 };
67
68 static devclass_t smscphy_devclass;
69
70 static driver_t smscphy_driver = {
71 "smscphy",
72 smscphy_methods,
73 sizeof(struct mii_softc)
74 };
75
76 DRIVER_MODULE(smscphy, miibus, smscphy_driver, smscphy_devclass, 0, 0);
77
78 static const struct mii_phydesc smscphys[] = {
79 MII_PHY_DESC(SMC, LAN8710A),
80 MII_PHY_END
81 };
82
83 static const struct mii_phy_funcs smscphy_funcs = {
84 smscphy_service,
85 smscphy_status,
86 mii_phy_reset
87 };
88
89 static int
smscphy_probe(device_t dev)90 smscphy_probe(device_t dev)
91 {
92
93 return (mii_phy_dev_probe(dev, smscphys, BUS_PROBE_DEFAULT));
94 }
95
96 static int
smscphy_attach(device_t dev)97 smscphy_attach(device_t dev)
98 {
99 struct mii_softc *sc;
100 const struct mii_phy_funcs *mpf;
101
102 sc = device_get_softc(dev);
103 mpf = &smscphy_funcs;
104 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, mpf, 1);
105 mii_phy_setmedia(sc);
106
107 return (0);
108 }
109
110 static int
smscphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)111 smscphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
112 {
113 struct ifmedia_entry *ife;
114 int reg;
115
116 ife = mii->mii_media.ifm_cur;
117
118 switch (cmd) {
119 case MII_POLLSTAT:
120 break;
121
122 case MII_MEDIACHG:
123 switch (IFM_SUBTYPE(ife->ifm_media)) {
124 case IFM_AUTO:
125 smscphy_auto(sc, ife->ifm_media);
126 break;
127
128 default:
129 mii_phy_setmedia(sc);
130 break;
131 }
132
133 break;
134
135 case MII_TICK:
136 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
137 break;
138 }
139
140 /* I have no idea why BMCR_ISO gets set. */
141 reg = PHY_READ(sc, MII_BMCR);
142 if (reg & BMCR_ISO) {
143 PHY_WRITE(sc, MII_BMCR, reg & ~BMCR_ISO);
144 }
145
146 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
147 if (reg & BMSR_LINK) {
148 sc->mii_ticks = 0;
149 break;
150 }
151
152 if (++sc->mii_ticks <= MII_ANEGTICKS) {
153 break;
154 }
155
156 sc->mii_ticks = 0;
157 PHY_RESET(sc);
158 smscphy_auto(sc, ife->ifm_media);
159 break;
160 }
161
162 /* Update the media status. */
163 PHY_STATUS(sc);
164
165 /* Callback if something changed. */
166 mii_phy_update(sc, cmd);
167 return (0);
168 }
169
170 static void
smscphy_auto(struct mii_softc * sc,int media)171 smscphy_auto(struct mii_softc *sc, int media)
172 {
173 uint16_t anar;
174
175 anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA;
176 if ((media & IFM_FLOW) != 0 || (sc->mii_flags & MIIF_FORCEPAUSE) != 0)
177 anar |= ANAR_FC;
178 PHY_WRITE(sc, MII_ANAR, anar);
179 /* Apparently this helps. */
180 anar = PHY_READ(sc, MII_ANAR);
181 PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
182 }
183
184 static void
smscphy_status(struct mii_softc * sc)185 smscphy_status(struct mii_softc *sc)
186 {
187 struct mii_data *mii;
188 uint32_t bmcr, bmsr, status;
189
190 mii = sc->mii_pdata;
191 mii->mii_media_status = IFM_AVALID;
192 mii->mii_media_active = IFM_ETHER;
193
194 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
195 if ((bmsr & BMSR_LINK) != 0)
196 mii->mii_media_status |= IFM_ACTIVE;
197
198 bmcr = PHY_READ(sc, MII_BMCR);
199 if ((bmcr & BMCR_ISO) != 0) {
200 mii->mii_media_active |= IFM_NONE;
201 mii->mii_media_status = 0;
202 return;
203 }
204
205 if ((bmcr & BMCR_LOOP) != 0)
206 mii->mii_media_active |= IFM_LOOP;
207
208 if ((bmcr & BMCR_AUTOEN) != 0) {
209 if ((bmsr & BMSR_ACOMP) == 0) {
210 /* Erg, still trying, I guess... */
211 mii->mii_media_active |= IFM_NONE;
212 return;
213 }
214 }
215
216 status = PHY_READ(sc, 0x1F);
217 if (status & 0x0008)
218 mii->mii_media_active |= IFM_100_TX;
219 else
220 mii->mii_media_active |= IFM_10_T;
221 if (status & 0x0010)
222 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc);
223 else
224 mii->mii_media_active |= IFM_HDX;
225 }
226