1 /*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 1997, 1998, 1999
5 * Bill Paul <wpaul@ee.columbia.edu>. 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 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Bill Paul.
18 * 4. Neither the name of the author nor the names of any co-contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 #include <sys/cdefs.h>
36 /*
37 * driver for AMD AM79c873 PHYs
38 * This driver also works for Davicom DM910{1,2} PHYs, which appear
39 * to be AM79c873 workalikes.
40 */
41
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/kernel.h>
45 #include <sys/module.h>
46 #include <sys/socket.h>
47 #include <sys/bus.h>
48
49 #include <net/if.h>
50 #include <net/if_media.h>
51
52 #include <dev/mii/mii.h>
53 #include <dev/mii/miivar.h>
54 #include "miidevs.h"
55
56 #include <dev/mii/amphyreg.h>
57
58 #include "miibus_if.h"
59
60 static int amphy_probe(device_t);
61 static int amphy_attach(device_t);
62
63 static device_method_t amphy_methods[] = {
64 /* device interface */
65 DEVMETHOD(device_probe, amphy_probe),
66 DEVMETHOD(device_attach, amphy_attach),
67 DEVMETHOD(device_detach, mii_phy_detach),
68 DEVMETHOD(device_shutdown, bus_generic_shutdown),
69 DEVMETHOD_END
70 };
71
72 static driver_t amphy_driver = {
73 "amphy",
74 amphy_methods,
75 sizeof(struct mii_softc)
76 };
77
78 DRIVER_MODULE(amphy, miibus, amphy_driver, 0, 0);
79
80 static int amphy_service(struct mii_softc *, struct mii_data *, int);
81 static void amphy_status(struct mii_softc *);
82
83 static const struct mii_phydesc amphys[] = {
84 MII_PHY_DESC(xxDAVICOM, DM9102),
85 MII_PHY_DESC(xxDAVICOM, DM9101),
86 MII_PHY_DESC(yyDAVICOM, DM9101),
87 MII_PHY_END
88 };
89
90 static const struct mii_phy_funcs amphy_funcs = {
91 amphy_service,
92 amphy_status,
93 mii_phy_reset
94 };
95
96 static int
amphy_probe(device_t dev)97 amphy_probe(device_t dev)
98 {
99
100 return (mii_phy_dev_probe(dev, amphys, BUS_PROBE_DEFAULT));
101 }
102
103 static int
amphy_attach(device_t dev)104 amphy_attach(device_t dev)
105 {
106
107 mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &hy_funcs, 1);
108 return (0);
109 }
110
111 static int
amphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)112 amphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
113 {
114
115 switch (cmd) {
116 case MII_POLLSTAT:
117 break;
118
119 case MII_MEDIACHG:
120 mii_phy_setmedia(sc);
121 break;
122
123 case MII_TICK:
124 if (mii_phy_tick(sc) == EJUSTRETURN)
125 return (0);
126 break;
127 }
128
129 /* Update the media status. */
130 PHY_STATUS(sc);
131
132 /* Callback if something changed. */
133 mii_phy_update(sc, cmd);
134 return (0);
135 }
136
137 static void
amphy_status(struct mii_softc * sc)138 amphy_status(struct mii_softc *sc)
139 {
140 struct mii_data *mii = sc->mii_pdata;
141 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
142 int bmsr, bmcr, par, anlpar;
143
144 mii->mii_media_status = IFM_AVALID;
145 mii->mii_media_active = IFM_ETHER;
146
147 bmsr = PHY_READ(sc, MII_BMSR) |
148 PHY_READ(sc, MII_BMSR);
149 if (bmsr & BMSR_LINK)
150 mii->mii_media_status |= IFM_ACTIVE;
151
152 bmcr = PHY_READ(sc, MII_BMCR);
153 if (bmcr & BMCR_ISO) {
154 mii->mii_media_active |= IFM_NONE;
155 mii->mii_media_status = 0;
156 return;
157 }
158
159 if (bmcr & BMCR_LOOP)
160 mii->mii_media_active |= IFM_LOOP;
161
162 if (bmcr & BMCR_AUTOEN) {
163 /*
164 * The PAR status bits are only valid if autonegotiation
165 * has completed (or it's disabled).
166 */
167 if ((bmsr & BMSR_ACOMP) == 0) {
168 /* Erg, still trying, I guess... */
169 mii->mii_media_active |= IFM_NONE;
170 return;
171 }
172
173 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
174 anlpar = PHY_READ(sc, MII_ANAR) &
175 PHY_READ(sc, MII_ANLPAR);
176 if (anlpar & ANLPAR_TX_FD)
177 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
178 else if (anlpar & ANLPAR_T4)
179 mii->mii_media_active |= IFM_100_T4|IFM_HDX;
180 else if (anlpar & ANLPAR_TX)
181 mii->mii_media_active |= IFM_100_TX|IFM_HDX;
182 else if (anlpar & ANLPAR_10_FD)
183 mii->mii_media_active |= IFM_10_T|IFM_FDX;
184 else if (anlpar & ANLPAR_10)
185 mii->mii_media_active |= IFM_10_T|IFM_HDX;
186 else
187 mii->mii_media_active |= IFM_NONE;
188 return;
189 }
190
191 /*
192 * Link partner is not capable of autonegotiation.
193 */
194 par = PHY_READ(sc, MII_AMPHY_DSCSR);
195 if (par & DSCSR_100FDX)
196 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
197 else if (par & DSCSR_100HDX)
198 mii->mii_media_active |= IFM_100_TX|IFM_HDX;
199 else if (par & DSCSR_10FDX)
200 mii->mii_media_active |= IFM_10_T|IFM_HDX;
201 else if (par & DSCSR_10HDX)
202 mii->mii_media_active |= IFM_10_T|IFM_HDX;
203 if ((mii->mii_media_active & IFM_FDX) != 0)
204 mii->mii_media_active |= mii_phy_flowstatus(sc);
205 } else
206 mii->mii_media_active = ife->ifm_media;
207 }
208