FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/lxtphy.c
1 /* OpenBSD: lxtphy.c,v 1.5 2000/08/26 20:04:17 nate Exp */
2 /* NetBSD: lxtphy.c,v 1.19 2000/02/02 23:34:57 thorpej Exp */
3
4 /*-
5 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
10 * NASA Ames Research Center.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the NetBSD
23 * Foundation, Inc. and its contributors.
24 * 4. Neither the name of The NetBSD Foundation nor the names of its
25 * contributors may be used to endorse or promote products derived
26 * from this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
29 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
31 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
32 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38 * POSSIBILITY OF SUCH DAMAGE.
39 */
40
41 /*-
42 * Copyright (c) 1997 Manuel Bouyer. All rights reserved.
43 *
44 * Redistribution and use in source and binary forms, with or without
45 * modification, are permitted provided that the following conditions
46 * are met:
47 * 1. Redistributions of source code must retain the above copyright
48 * notice, this list of conditions and the following disclaimer.
49 * 2. Redistributions in binary form must reproduce the above copyright
50 * notice, this list of conditions and the following disclaimer in the
51 * documentation and/or other materials provided with the distribution.
52 * 3. All advertising materials mentioning features or use of this software
53 * must display the following acknowledgement:
54 * This product includes software developed by Manuel Bouyer.
55 * 4. The name of the author may not be used to endorse or promote products
56 * derived from this software without specific prior written permission.
57 *
58 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
59 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
60 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
61 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
62 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
63 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
64 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
65 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
66 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
67 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
68 */
69
70 #include <sys/cdefs.h>
71 __FBSDID("$FreeBSD$");
72
73 /*
74 * driver for Level One's LXT-970 ethernet 10/100 PHY
75 * datasheet from www.level1.com
76 */
77
78 #include <sys/param.h>
79 #include <sys/systm.h>
80 #include <sys/kernel.h>
81 #include <sys/socket.h>
82 #include <sys/errno.h>
83 #include <sys/module.h>
84 #include <sys/bus.h>
85
86 #include <net/if.h>
87 #include <net/if_media.h>
88
89 #include <dev/mii/mii.h>
90 #include <dev/mii/miivar.h>
91 #include "miidevs.h"
92
93 #include <dev/mii/lxtphyreg.h>
94
95 #include "miibus_if.h"
96
97 static int lxtphy_probe(device_t);
98 static int lxtphy_attach(device_t);
99
100 static device_method_t lxtphy_methods[] = {
101 /* device interface */
102 DEVMETHOD(device_probe, lxtphy_probe),
103 DEVMETHOD(device_attach, lxtphy_attach),
104 DEVMETHOD(device_detach, mii_phy_detach),
105 DEVMETHOD(device_shutdown, bus_generic_shutdown),
106 { 0, 0 }
107 };
108
109 static devclass_t lxtphy_devclass;
110
111 static driver_t lxtphy_driver = {
112 "lxtphy",
113 lxtphy_methods,
114 sizeof(struct mii_softc)
115 };
116
117 DRIVER_MODULE(lxtphy, miibus, lxtphy_driver, lxtphy_devclass, 0, 0);
118
119 static int lxtphy_service(struct mii_softc *, struct mii_data *, int);
120 static void lxtphy_status(struct mii_softc *);
121 static void lxtphy_set_tp(struct mii_softc *);
122 static void lxtphy_set_fx(struct mii_softc *);
123
124 static const struct mii_phydesc lxtphys[] = {
125 MII_PHY_DESC(xxLEVEL1, LXT970),
126 MII_PHY_END
127 };
128
129 static int
130 lxtphy_probe(device_t dev)
131 {
132
133 return (mii_phy_dev_probe(dev, lxtphys, BUS_PROBE_DEFAULT));
134 }
135
136 static int
137 lxtphy_attach(device_t dev)
138 {
139 struct mii_softc *sc;
140 struct mii_attach_args *ma;
141 struct mii_data *mii;
142 const char *nic;
143
144 sc = device_get_softc(dev);
145 ma = device_get_ivars(dev);
146 sc->mii_dev = device_get_parent(dev);
147 mii = device_get_softc(sc->mii_dev);
148 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
149
150 sc->mii_inst = mii->mii_instance;
151 sc->mii_phy = ma->mii_phyno;
152 sc->mii_service = lxtphy_service;
153 sc->mii_pdata = mii;
154
155 mii->mii_instance++;
156
157 mii_phy_reset(sc);
158
159 sc->mii_capabilities =
160 PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
161 device_printf(dev, " ");
162
163 /*
164 * On Apple BMAC controllers, we end up in a weird state
165 * of partially-completed autonegotiation on boot. So
166 * force autonegotation to try again.
167 */
168 nic = device_get_name(device_get_parent(sc->mii_dev));
169 if (strcmp(nic, "bm") == 0)
170 sc->mii_flags |= MIIF_FORCEANEG | MIIF_NOISOLATE;
171
172 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
173 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, 0, sc->mii_inst),
174 MII_MEDIA_100_TX);
175 printf("100baseFX, ");
176 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, IFM_FDX, sc->mii_inst),
177 MII_MEDIA_100_TX_FDX);
178 printf("100baseFX-FDX, ");
179 #undef ADD
180
181 mii_phy_add_media(sc);
182 printf("\n");
183
184 MIIBUS_MEDIAINIT(sc->mii_dev);
185 return (0);
186 }
187
188 static int
189 lxtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
190 {
191 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
192 int reg;
193
194 switch (cmd) {
195 case MII_POLLSTAT:
196 /*
197 * If we're not polling our PHY instance, just return.
198 */
199 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
200 return (0);
201 break;
202
203 case MII_MEDIACHG:
204 /*
205 * If the media indicates a different PHY instance,
206 * isolate ourselves.
207 */
208 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
209 reg = PHY_READ(sc, MII_BMCR);
210 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
211 return (0);
212 }
213
214 /*
215 * If the interface is not up, don't do anything.
216 */
217 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
218 break;
219
220 if (IFM_SUBTYPE(ife->ifm_media) == IFM_100_FX)
221 lxtphy_set_fx(sc);
222 else
223 lxtphy_set_tp(sc);
224
225 mii_phy_setmedia(sc);
226 break;
227
228 case MII_TICK:
229 /*
230 * If we're not currently selected, just return.
231 */
232 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
233 return (0);
234 if (mii_phy_tick(sc) == EJUSTRETURN)
235 return (0);
236 break;
237 }
238
239 /* Update the media status. */
240 lxtphy_status(sc);
241
242 /* Callback if something changed. */
243 mii_phy_update(sc, cmd);
244 return (0);
245 }
246
247 static void
248 lxtphy_status(struct mii_softc *sc)
249 {
250 struct mii_data *mii = sc->mii_pdata;
251 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
252 int bmcr, bmsr, csr;
253
254 mii->mii_media_status = IFM_AVALID;
255 mii->mii_media_active = IFM_ETHER;
256
257 /*
258 * Get link status from the CSR; we need to read the CSR
259 * for media type anyhow, and the link status in the CSR
260 * doens't latch, so fewer register reads are required.
261 */
262 csr = PHY_READ(sc, MII_LXTPHY_CSR);
263 if (csr & CSR_LINK)
264 mii->mii_media_status |= IFM_ACTIVE;
265
266 bmcr = PHY_READ(sc, MII_BMCR);
267 if (bmcr & BMCR_ISO) {
268 mii->mii_media_active |= IFM_NONE;
269 mii->mii_media_status = 0;
270 return;
271 }
272
273 if (bmcr & BMCR_LOOP)
274 mii->mii_media_active |= IFM_LOOP;
275
276 if (bmcr & BMCR_AUTOEN) {
277 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
278 if ((bmsr & BMSR_ACOMP) == 0) {
279 /* Erg, still trying, I guess... */
280 mii->mii_media_active |= IFM_NONE;
281 return;
282 }
283 if (csr & CSR_SPEED)
284 mii->mii_media_active |= IFM_100_TX;
285 else
286 mii->mii_media_active |= IFM_10_T;
287 if (csr & CSR_DUPLEX)
288 mii->mii_media_active |= IFM_FDX;
289 } else
290 mii->mii_media_active = ife->ifm_media;
291 }
292
293 static void
294 lxtphy_set_tp(struct mii_softc *sc)
295 {
296 int cfg;
297
298 cfg = PHY_READ(sc, MII_LXTPHY_CONFIG);
299 cfg &= ~CONFIG_100BASEFX;
300 PHY_WRITE(sc, MII_LXTPHY_CONFIG, cfg);
301 }
302
303 static void
304 lxtphy_set_fx(struct mii_softc *sc)
305 {
306 int cfg;
307
308 cfg = PHY_READ(sc, MII_LXTPHY_CONFIG);
309 cfg |= CONFIG_100BASEFX;
310 PHY_WRITE(sc, MII_LXTPHY_CONFIG, cfg);
311 }
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