1 /*-
2 * Copyright (c) 2001-2003, Shunsuke Akiyama <akiyama@FreeBSD.org>.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30
31 /*
32 * driver for RealTek RTL8150 internal PHY
33 */
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/malloc.h>
39 #include <sys/module.h>
40 #include <sys/socket.h>
41 #include <sys/bus.h>
42
43 #include <net/if.h>
44 #include <net/if_arp.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 <dev/usb/net/ruephyreg.h>
52
53 #include "miibus_if.h"
54
55 static int ruephy_probe(device_t);
56 static int ruephy_attach(device_t);
57
58 static device_method_t ruephy_methods[] = {
59 /* device interface */
60 DEVMETHOD(device_probe, ruephy_probe),
61 DEVMETHOD(device_attach, ruephy_attach),
62 DEVMETHOD(device_detach, mii_phy_detach),
63 DEVMETHOD(device_shutdown, bus_generic_shutdown),
64 DEVMETHOD_END
65 };
66
67 static devclass_t ruephy_devclass;
68
69 static driver_t ruephy_driver = {
70 "ruephy",
71 ruephy_methods,
72 sizeof(struct mii_softc)
73 };
74
75 DRIVER_MODULE(ruephy, miibus, ruephy_driver, ruephy_devclass, NULL, NULL);
76
77 static int ruephy_service(struct mii_softc *, struct mii_data *, int);
78 static void ruephy_reset(struct mii_softc *);
79 static void ruephy_status(struct mii_softc *);
80
81 /*
82 * The RealTek RTL8150 internal PHY doesn't have vendor/device ID
83 * registers; rue(4) fakes up a return value of all zeros.
84 */
85 static const struct mii_phydesc ruephys[] = {
86 { 0, 0, "RealTek RTL8150 internal media interface" },
87 MII_PHY_END
88 };
89
90 static const struct mii_phy_funcs ruephy_funcs = {
91 ruephy_service,
92 ruephy_status,
93 ruephy_reset
94 };
95
96 static int
ruephy_probe(device_t dev)97 ruephy_probe(device_t dev)
98 {
99
100 if (strcmp(device_get_name(device_get_parent(device_get_parent(dev))),
101 "rue") == 0)
102 return (mii_phy_dev_probe(dev, ruephys, BUS_PROBE_DEFAULT));
103 return (ENXIO);
104 }
105
106 static int
ruephy_attach(device_t dev)107 ruephy_attach(device_t dev)
108 {
109
110 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
111 &ruephy_funcs, 1);
112 return (0);
113 }
114
115 static int
ruephy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)116 ruephy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
117 {
118 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
119 int reg;
120
121 switch (cmd) {
122 case MII_POLLSTAT:
123 break;
124
125 case MII_MEDIACHG:
126 /*
127 * If the interface is not up, don't do anything.
128 */
129 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
130 break;
131
132 mii_phy_setmedia(sc);
133 break;
134
135 case MII_TICK:
136 /*
137 * Is the interface even up?
138 */
139 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
140 return (0);
141
142 /*
143 * Only used for autonegotiation.
144 */
145 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
146 break;
147
148 /*
149 * Check to see if we have link. If we do, we don't
150 * need to restart the autonegotiation process. Read
151 * the MSR twice in case it's latched.
152 */
153 reg = PHY_READ(sc, RUEPHY_MII_MSR) |
154 PHY_READ(sc, RUEPHY_MII_MSR);
155 if (reg & RUEPHY_MSR_LINK)
156 break;
157
158 /* Only retry autonegotiation every mii_anegticks seconds. */
159 if (sc->mii_ticks <= sc->mii_anegticks)
160 break;
161
162 sc->mii_ticks = 0;
163 PHY_RESET(sc);
164 if (mii_phy_auto(sc) == EJUSTRETURN)
165 return (0);
166 break;
167 }
168
169 /* Update the media status. */
170 PHY_STATUS(sc);
171
172 /* Callback if something changed. */
173 mii_phy_update(sc, cmd);
174
175 return (0);
176 }
177
178 static void
ruephy_reset(struct mii_softc * sc)179 ruephy_reset(struct mii_softc *sc)
180 {
181
182 mii_phy_reset(sc);
183
184 /*
185 * XXX RealTek RTL8150 PHY doesn't set the BMCR properly after
186 * XXX reset, which breaks autonegotiation.
187 */
188 PHY_WRITE(sc, MII_BMCR, (BMCR_S100 | BMCR_AUTOEN | BMCR_FDX));
189 }
190
191 static void
ruephy_status(struct mii_softc * phy)192 ruephy_status(struct mii_softc *phy)
193 {
194 struct mii_data *mii = phy->mii_pdata;
195 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
196 int bmsr, bmcr, msr;
197
198 mii->mii_media_status = IFM_AVALID;
199 mii->mii_media_active = IFM_ETHER;
200
201 msr = PHY_READ(phy, RUEPHY_MII_MSR) | PHY_READ(phy, RUEPHY_MII_MSR);
202 if (msr & RUEPHY_MSR_LINK)
203 mii->mii_media_status |= IFM_ACTIVE;
204
205 bmcr = PHY_READ(phy, MII_BMCR);
206 if (bmcr & BMCR_ISO) {
207 mii->mii_media_active |= IFM_NONE;
208 mii->mii_media_status = 0;
209 return;
210 }
211
212 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
213 if (bmcr & BMCR_AUTOEN) {
214 if ((bmsr & BMSR_ACOMP) == 0) {
215 /* Erg, still trying, I guess... */
216 mii->mii_media_active |= IFM_NONE;
217 return;
218 }
219
220 if (msr & RUEPHY_MSR_SPEED100)
221 mii->mii_media_active |= IFM_100_TX;
222 else
223 mii->mii_media_active |= IFM_10_T;
224
225 if (msr & RUEPHY_MSR_DUPLEX)
226 mii->mii_media_active |=
227 IFM_FDX | mii_phy_flowstatus(phy);
228 else
229 mii->mii_media_active |= IFM_HDX;
230 } else
231 mii->mii_media_active = ife->ifm_media;
232 }
233