1 /*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 2000
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 the XaQti XMAC II's internal PHY. This is sort of
38 * like a 10/100 PHY, except the only thing we're really autoselecting
39 * here is full/half duplex. Speed is always 1000mbps.
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/xmphyreg.h>
57
58 #include "miibus_if.h"
59
60 static int xmphy_probe(device_t);
61 static int xmphy_attach(device_t);
62
63 static device_method_t xmphy_methods[] = {
64 /* device interface */
65 DEVMETHOD(device_probe, xmphy_probe),
66 DEVMETHOD(device_attach, xmphy_attach),
67 DEVMETHOD(device_detach, mii_phy_detach),
68 DEVMETHOD(device_shutdown, bus_generic_shutdown),
69 DEVMETHOD_END
70 };
71
72 static driver_t xmphy_driver = {
73 "xmphy",
74 xmphy_methods,
75 sizeof(struct mii_softc)
76 };
77
78 DRIVER_MODULE(xmphy, miibus, xmphy_driver, 0, 0);
79
80 static int xmphy_service(struct mii_softc *, struct mii_data *, int);
81 static void xmphy_status(struct mii_softc *);
82 static int xmphy_mii_phy_auto(struct mii_softc *);
83
84 static const struct mii_phydesc xmphys[] = {
85 MII_PHY_DESC(xxJATO, BASEX),
86 MII_PHY_DESC(xxXAQTI, XMACII),
87 MII_PHY_END
88 };
89
90 static const struct mii_phy_funcs xmphy_funcs = {
91 xmphy_service,
92 xmphy_status,
93 mii_phy_reset
94 };
95
96 static int
xmphy_probe(device_t dev)97 xmphy_probe(device_t dev)
98 {
99
100 return (mii_phy_dev_probe(dev, xmphys, BUS_PROBE_DEFAULT));
101 }
102
103 static int
xmphy_attach(device_t dev)104 xmphy_attach(device_t dev)
105 {
106 struct mii_softc *sc;
107 const char *sep = "";
108
109 sc = device_get_softc(dev);
110
111 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
112 &xmphy_funcs, 0);
113 sc->mii_anegticks = MII_ANEGTICKS;
114
115 PHY_RESET(sc);
116
117 #define ADD(m) ifmedia_add(&sc->mii_pdata->mii_media, (m), 0, NULL)
118 #define PRINT(s) printf("%s%s", sep, s); sep = ", "
119
120 device_printf(dev, " ");
121 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, sc->mii_inst));
122 PRINT("1000baseSX");
123 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, sc->mii_inst));
124 PRINT("1000baseSX-FDX");
125 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst));
126 PRINT("auto");
127
128 printf("\n");
129
130 #undef ADD
131 #undef PRINT
132
133 MIIBUS_MEDIAINIT(sc->mii_dev);
134 return (0);
135 }
136
137 static int
xmphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)138 xmphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
139 {
140 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
141 int reg;
142
143 switch (cmd) {
144 case MII_POLLSTAT:
145 break;
146
147 case MII_MEDIACHG:
148 switch (IFM_SUBTYPE(ife->ifm_media)) {
149 case IFM_AUTO:
150 #ifdef foo
151 /*
152 * If we're already in auto mode, just return.
153 */
154 if (PHY_READ(sc, XMPHY_MII_BMCR) & XMPHY_BMCR_AUTOEN)
155 return (0);
156 #endif
157 (void)xmphy_mii_phy_auto(sc);
158 break;
159 case IFM_1000_SX:
160 PHY_RESET(sc);
161 if ((ife->ifm_media & IFM_FDX) != 0) {
162 PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_FDX);
163 PHY_WRITE(sc, XMPHY_MII_BMCR, XMPHY_BMCR_FDX);
164 } else {
165 PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_HDX);
166 PHY_WRITE(sc, XMPHY_MII_BMCR, 0);
167 }
168 break;
169 default:
170 return (EINVAL);
171 }
172 break;
173
174 case MII_TICK:
175 /*
176 * Only used for autonegotiation.
177 */
178 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
179 break;
180
181 /*
182 * Check to see if we have link. If we do, we don't
183 * need to restart the autonegotiation process. Read
184 * the BMSR twice in case it's latched.
185 */
186 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
187 if (reg & BMSR_LINK)
188 break;
189
190 /* Only retry autonegotiation every mii_anegticks seconds. */
191 if (sc->mii_ticks <= sc->mii_anegticks)
192 break;
193
194 sc->mii_ticks = 0;
195
196 PHY_RESET(sc);
197 xmphy_mii_phy_auto(sc);
198 return (0);
199 }
200
201 /* Update the media status. */
202 xmphy_status(sc);
203
204 /* Callback if something changed. */
205 mii_phy_update(sc, cmd);
206 return (0);
207 }
208
209 static void
xmphy_status(struct mii_softc * sc)210 xmphy_status(struct mii_softc *sc)
211 {
212 struct mii_data *mii = sc->mii_pdata;
213 int bmsr, bmcr, anlpar;
214
215 mii->mii_media_status = IFM_AVALID;
216 mii->mii_media_active = IFM_ETHER;
217
218 bmsr = PHY_READ(sc, XMPHY_MII_BMSR) |
219 PHY_READ(sc, XMPHY_MII_BMSR);
220 if (bmsr & XMPHY_BMSR_LINK)
221 mii->mii_media_status |= IFM_ACTIVE;
222
223 /* Do dummy read of extended status register. */
224 bmcr = PHY_READ(sc, XMPHY_MII_EXTSTS);
225
226 bmcr = PHY_READ(sc, XMPHY_MII_BMCR);
227
228 if (bmcr & XMPHY_BMCR_LOOP)
229 mii->mii_media_active |= IFM_LOOP;
230
231 if (bmcr & XMPHY_BMCR_AUTOEN) {
232 if ((bmsr & XMPHY_BMSR_ACOMP) == 0) {
233 if (bmsr & XMPHY_BMSR_LINK) {
234 mii->mii_media_active |= IFM_1000_SX|IFM_HDX;
235 return;
236 }
237 /* Erg, still trying, I guess... */
238 mii->mii_media_active |= IFM_NONE;
239 return;
240 }
241
242 mii->mii_media_active |= IFM_1000_SX;
243 anlpar = PHY_READ(sc, XMPHY_MII_ANAR) &
244 PHY_READ(sc, XMPHY_MII_ANLPAR);
245 if (anlpar & XMPHY_ANLPAR_FDX)
246 mii->mii_media_active |= IFM_FDX;
247 else
248 mii->mii_media_active |= IFM_HDX;
249 return;
250 }
251
252 mii->mii_media_active |= IFM_1000_SX;
253 if (bmcr & XMPHY_BMCR_FDX)
254 mii->mii_media_active |= IFM_FDX;
255 else
256 mii->mii_media_active |= IFM_HDX;
257 }
258
259 static int
xmphy_mii_phy_auto(struct mii_softc * mii)260 xmphy_mii_phy_auto(struct mii_softc *mii)
261 {
262 int anar = 0;
263
264 anar = PHY_READ(mii, XMPHY_MII_ANAR);
265 anar |= XMPHY_ANAR_FDX|XMPHY_ANAR_HDX;
266 PHY_WRITE(mii, XMPHY_MII_ANAR, anar);
267 DELAY(1000);
268 PHY_WRITE(mii, XMPHY_MII_BMCR,
269 XMPHY_BMCR_AUTOEN | XMPHY_BMCR_STARTNEG);
270
271 return (EJUSTRETURN);
272 }
273