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