nsphy.c revision 1.59 1 1.59 msaitoh /* $NetBSD: nsphy.c,v 1.59 2014/06/16 16:48:16 msaitoh Exp $ */
2 1.5 thorpej
3 1.5 thorpej /*-
4 1.27 thorpej * Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc.
5 1.5 thorpej * All rights reserved.
6 1.5 thorpej *
7 1.5 thorpej * This code is derived from software contributed to The NetBSD Foundation
8 1.5 thorpej * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
9 1.5 thorpej * NASA Ames Research Center.
10 1.5 thorpej *
11 1.5 thorpej * Redistribution and use in source and binary forms, with or without
12 1.5 thorpej * modification, are permitted provided that the following conditions
13 1.5 thorpej * are met:
14 1.5 thorpej * 1. Redistributions of source code must retain the above copyright
15 1.5 thorpej * notice, this list of conditions and the following disclaimer.
16 1.5 thorpej * 2. Redistributions in binary form must reproduce the above copyright
17 1.5 thorpej * notice, this list of conditions and the following disclaimer in the
18 1.5 thorpej * documentation and/or other materials provided with the distribution.
19 1.5 thorpej *
20 1.5 thorpej * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 1.5 thorpej * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 1.5 thorpej * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 1.5 thorpej * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 1.5 thorpej * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 1.5 thorpej * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 1.5 thorpej * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 1.5 thorpej * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 1.5 thorpej * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 1.5 thorpej * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 1.5 thorpej * POSSIBILITY OF SUCH DAMAGE.
31 1.5 thorpej */
32 1.5 thorpej
33 1.1 bouyer /*
34 1.1 bouyer * Copyright (c) 1997 Manuel Bouyer. All rights reserved.
35 1.1 bouyer *
36 1.1 bouyer * Redistribution and use in source and binary forms, with or without
37 1.1 bouyer * modification, are permitted provided that the following conditions
38 1.1 bouyer * are met:
39 1.1 bouyer * 1. Redistributions of source code must retain the above copyright
40 1.1 bouyer * notice, this list of conditions and the following disclaimer.
41 1.1 bouyer * 2. Redistributions in binary form must reproduce the above copyright
42 1.1 bouyer * notice, this list of conditions and the following disclaimer in the
43 1.1 bouyer * documentation and/or other materials provided with the distribution.
44 1.1 bouyer *
45 1.1 bouyer * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
46 1.1 bouyer * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
47 1.1 bouyer * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
48 1.1 bouyer * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
49 1.1 bouyer * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
50 1.1 bouyer * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
51 1.1 bouyer * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
52 1.1 bouyer * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
53 1.1 bouyer * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
54 1.1 bouyer * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
55 1.1 bouyer */
56 1.1 bouyer
57 1.5 thorpej /*
58 1.5 thorpej * driver for National Semiconductor's DP83840A ethernet 10/100 PHY
59 1.5 thorpej * Data Sheet available from www.national.com
60 1.5 thorpej */
61 1.33 lukem
62 1.33 lukem #include <sys/cdefs.h>
63 1.59 msaitoh __KERNEL_RCSID(0, "$NetBSD: nsphy.c,v 1.59 2014/06/16 16:48:16 msaitoh Exp $");
64 1.1 bouyer
65 1.1 bouyer #include <sys/param.h>
66 1.1 bouyer #include <sys/systm.h>
67 1.1 bouyer #include <sys/kernel.h>
68 1.1 bouyer #include <sys/device.h>
69 1.1 bouyer #include <sys/socket.h>
70 1.17 thorpej #include <sys/errno.h>
71 1.5 thorpej
72 1.1 bouyer #include <net/if.h>
73 1.1 bouyer #include <net/if_media.h>
74 1.1 bouyer
75 1.5 thorpej #include <dev/mii/mii.h>
76 1.5 thorpej #include <dev/mii/miivar.h>
77 1.5 thorpej #include <dev/mii/miidevs.h>
78 1.5 thorpej
79 1.5 thorpej #include <dev/mii/nsphyreg.h>
80 1.5 thorpej
81 1.54 xtraeme static int nsphymatch(device_t, cfdata_t, void *);
82 1.54 xtraeme static void nsphyattach(device_t, device_t, void *);
83 1.1 bouyer
84 1.54 xtraeme CFATTACH_DECL_NEW(nsphy, sizeof(struct mii_softc),
85 1.38 thorpej nsphymatch, nsphyattach, mii_phy_detach, mii_phy_activate);
86 1.1 bouyer
87 1.42 thorpej static int nsphy_service(struct mii_softc *, struct mii_data *, int);
88 1.42 thorpej static void nsphy_status(struct mii_softc *);
89 1.42 thorpej static void nsphy_reset(struct mii_softc *sc);
90 1.5 thorpej
91 1.42 thorpej static const struct mii_phy_funcs nsphy_funcs = {
92 1.40 briggs nsphy_service, nsphy_status, nsphy_reset,
93 1.27 thorpej };
94 1.27 thorpej
95 1.42 thorpej static const struct mii_phydesc nsphys[] = {
96 1.31 thorpej { MII_OUI_xxNATSEMI, MII_MODEL_xxNATSEMI_DP83840,
97 1.31 thorpej MII_STR_xxNATSEMI_DP83840 },
98 1.31 thorpej
99 1.31 thorpej { 0, 0,
100 1.31 thorpej NULL },
101 1.31 thorpej };
102 1.31 thorpej
103 1.42 thorpej static int
104 1.54 xtraeme nsphymatch(device_t parent, cfdata_t match, void *aux)
105 1.1 bouyer {
106 1.5 thorpej struct mii_attach_args *ma = aux;
107 1.5 thorpej
108 1.31 thorpej if (mii_phy_match(ma, nsphys) != NULL)
109 1.14 thorpej return (10);
110 1.1 bouyer
111 1.5 thorpej return (0);
112 1.1 bouyer }
113 1.1 bouyer
114 1.42 thorpej static void
115 1.54 xtraeme nsphyattach(device_t parent, device_t self, void *aux)
116 1.1 bouyer {
117 1.46 thorpej struct mii_softc *sc = device_private(self);
118 1.5 thorpej struct mii_attach_args *ma = aux;
119 1.5 thorpej struct mii_data *mii = ma->mii_data;
120 1.31 thorpej const struct mii_phydesc *mpd;
121 1.5 thorpej
122 1.31 thorpej mpd = mii_phy_match(ma, nsphys);
123 1.39 thorpej aprint_naive(": Media interface\n");
124 1.39 thorpej aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
125 1.5 thorpej
126 1.54 xtraeme sc->mii_dev = self;
127 1.15 thorpej sc->mii_inst = mii->mii_instance;
128 1.15 thorpej sc->mii_phy = ma->mii_phyno;
129 1.27 thorpej sc->mii_funcs = &nsphy_funcs;
130 1.15 thorpej sc->mii_pdata = mii;
131 1.34 thorpej sc->mii_flags = ma->mii_flags;
132 1.49 christos sc->mii_anegticks = MII_ANEGTICKS;
133 1.13 thorpej
134 1.27 thorpej PHY_RESET(sc);
135 1.5 thorpej
136 1.15 thorpej sc->mii_capabilities =
137 1.15 thorpej PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
138 1.54 xtraeme aprint_normal_dev(self, "");
139 1.15 thorpej if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
140 1.39 thorpej aprint_error("no media present");
141 1.5 thorpej else
142 1.22 thorpej mii_phy_add_media(sc);
143 1.39 thorpej aprint_normal("\n");
144 1.5 thorpej }
145 1.5 thorpej
146 1.42 thorpej static int
147 1.32 thorpej nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
148 1.5 thorpej {
149 1.10 thorpej struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
150 1.5 thorpej int reg;
151 1.21 thorpej
152 1.5 thorpej switch (cmd) {
153 1.5 thorpej case MII_POLLSTAT:
154 1.5 thorpej /*
155 1.5 thorpej * If we're not polling our PHY instance, just return.
156 1.5 thorpej */
157 1.15 thorpej if (IFM_INST(ife->ifm_media) != sc->mii_inst)
158 1.5 thorpej return (0);
159 1.5 thorpej break;
160 1.5 thorpej
161 1.5 thorpej case MII_MEDIACHG:
162 1.5 thorpej /*
163 1.5 thorpej * If the media indicates a different PHY instance,
164 1.5 thorpej * isolate ourselves.
165 1.5 thorpej */
166 1.15 thorpej if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
167 1.15 thorpej reg = PHY_READ(sc, MII_BMCR);
168 1.15 thorpej PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
169 1.5 thorpej return (0);
170 1.5 thorpej }
171 1.5 thorpej
172 1.5 thorpej /*
173 1.5 thorpej * If the interface is not up, don't do anything.
174 1.5 thorpej */
175 1.5 thorpej if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
176 1.5 thorpej break;
177 1.5 thorpej
178 1.15 thorpej reg = PHY_READ(sc, MII_NSPHY_PCR);
179 1.9 thorpej
180 1.5 thorpej /*
181 1.5 thorpej * Set up the PCR to use LED4 to indicate full-duplex
182 1.5 thorpej * in both 10baseT and 100baseTX modes.
183 1.5 thorpej */
184 1.9 thorpej reg |= PCR_LED4MODE;
185 1.9 thorpej
186 1.9 thorpej /*
187 1.41 wiz * Make sure Carrier Integrity Monitor function is
188 1.9 thorpej * disabled (normal for Node operation, but sometimes
189 1.9 thorpej * it's not set?!)
190 1.9 thorpej */
191 1.9 thorpej reg |= PCR_CIMDIS;
192 1.9 thorpej
193 1.9 thorpej /*
194 1.18 thorpej * Make sure "force link good" is set to normal mode.
195 1.18 thorpej * It's only intended for debugging.
196 1.9 thorpej */
197 1.18 thorpej reg |= PCR_FLINK100;
198 1.9 thorpej
199 1.9 thorpej /*
200 1.9 thorpej * Mystery bits which are supposedly `reserved',
201 1.9 thorpej * but we seem to need to set them when the PHY
202 1.28 martin * is connected to some interfaces:
203 1.28 martin *
204 1.28 martin * 0x0400 is needed for fxp
205 1.28 martin * (Intel EtherExpress Pro 10+/100B, 82557 chip)
206 1.28 martin * (nsphy with a DP83840 chip)
207 1.28 martin * 0x0100 may be needed for some other card
208 1.9 thorpej */
209 1.9 thorpej reg |= 0x0100 | 0x0400;
210 1.9 thorpej
211 1.15 thorpej PHY_WRITE(sc, MII_NSPHY_PCR, reg);
212 1.5 thorpej
213 1.25 thorpej mii_phy_setmedia(sc);
214 1.5 thorpej break;
215 1.5 thorpej
216 1.5 thorpej case MII_TICK:
217 1.5 thorpej /*
218 1.5 thorpej * If we're not currently selected, just return.
219 1.5 thorpej */
220 1.15 thorpej if (IFM_INST(ife->ifm_media) != sc->mii_inst)
221 1.5 thorpej return (0);
222 1.5 thorpej
223 1.26 thorpej if (mii_phy_tick(sc) == EJUSTRETURN)
224 1.17 thorpej return (0);
225 1.5 thorpej break;
226 1.20 thorpej
227 1.20 thorpej case MII_DOWN:
228 1.20 thorpej mii_phy_down(sc);
229 1.20 thorpej return (0);
230 1.5 thorpej }
231 1.5 thorpej
232 1.5 thorpej /* Update the media status. */
233 1.24 thorpej mii_phy_status(sc);
234 1.5 thorpej
235 1.5 thorpej /* Callback if something changed. */
236 1.26 thorpej mii_phy_update(sc, cmd);
237 1.5 thorpej return (0);
238 1.5 thorpej }
239 1.5 thorpej
240 1.42 thorpej static void
241 1.32 thorpej nsphy_status(struct mii_softc *sc)
242 1.5 thorpej {
243 1.15 thorpej struct mii_data *mii = sc->mii_pdata;
244 1.19 thorpej struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
245 1.8 thorpej int bmsr, bmcr, par, anlpar;
246 1.5 thorpej
247 1.5 thorpej mii->mii_media_status = IFM_AVALID;
248 1.5 thorpej mii->mii_media_active = IFM_ETHER;
249 1.1 bouyer
250 1.15 thorpej bmsr = PHY_READ(sc, MII_BMSR) |
251 1.15 thorpej PHY_READ(sc, MII_BMSR);
252 1.5 thorpej if (bmsr & BMSR_LINK)
253 1.5 thorpej mii->mii_media_status |= IFM_ACTIVE;
254 1.5 thorpej
255 1.15 thorpej bmcr = PHY_READ(sc, MII_BMCR);
256 1.5 thorpej if (bmcr & BMCR_ISO) {
257 1.5 thorpej mii->mii_media_active |= IFM_NONE;
258 1.5 thorpej mii->mii_media_status = 0;
259 1.1 bouyer return;
260 1.1 bouyer }
261 1.5 thorpej
262 1.5 thorpej if (bmcr & BMCR_LOOP)
263 1.5 thorpej mii->mii_media_active |= IFM_LOOP;
264 1.5 thorpej
265 1.5 thorpej if (bmcr & BMCR_AUTOEN) {
266 1.5 thorpej /*
267 1.58 msaitoh * The PAR status bits are only valid if autonegotiation
268 1.5 thorpej * has completed (or it's disabled).
269 1.5 thorpej */
270 1.5 thorpej if ((bmsr & BMSR_ACOMP) == 0) {
271 1.7 thorpej /* Erg, still trying, I guess... */
272 1.7 thorpej mii->mii_media_active |= IFM_NONE;
273 1.5 thorpej return;
274 1.5 thorpej }
275 1.8 thorpej
276 1.8 thorpej /*
277 1.8 thorpej * Argh. The PAR doesn't seem to indicate duplex mode
278 1.8 thorpej * properly! Determine media based on link partner's
279 1.8 thorpej * advertised capabilities.
280 1.8 thorpej */
281 1.15 thorpej if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
282 1.15 thorpej anlpar = PHY_READ(sc, MII_ANAR) &
283 1.15 thorpej PHY_READ(sc, MII_ANLPAR);
284 1.56 cegger if (anlpar & ANLPAR_TX_FD)
285 1.56 cegger mii->mii_media_active |= IFM_100_TX|IFM_FDX;
286 1.56 cegger else if (anlpar & ANLPAR_T4)
287 1.59 msaitoh mii->mii_media_active |= IFM_100_T4|IFM_HDX;
288 1.8 thorpej else if (anlpar & ANLPAR_TX)
289 1.59 msaitoh mii->mii_media_active |= IFM_100_TX|IFM_HDX;
290 1.8 thorpej else if (anlpar & ANLPAR_10_FD)
291 1.8 thorpej mii->mii_media_active |= IFM_10_T|IFM_FDX;
292 1.8 thorpej else if (anlpar & ANLPAR_10)
293 1.59 msaitoh mii->mii_media_active |= IFM_10_T|IFM_HDX;
294 1.8 thorpej else
295 1.8 thorpej mii->mii_media_active |= IFM_NONE;
296 1.8 thorpej return;
297 1.8 thorpej }
298 1.8 thorpej
299 1.8 thorpej /*
300 1.8 thorpej * Link partner is not capable of autonegotiation.
301 1.8 thorpej * We will never be in full-duplex mode if this is
302 1.8 thorpej * the case, so reading the PAR is OK.
303 1.8 thorpej */
304 1.15 thorpej par = PHY_READ(sc, MII_NSPHY_PAR);
305 1.5 thorpej if (par & PAR_10)
306 1.5 thorpej mii->mii_media_active |= IFM_10_T;
307 1.5 thorpej else
308 1.5 thorpej mii->mii_media_active |= IFM_100_TX;
309 1.59 msaitoh mii->mii_media_active |= IFM_HDX;
310 1.16 thorpej } else
311 1.19 thorpej mii->mii_media_active = ife->ifm_media;
312 1.1 bouyer }
313 1.40 briggs
314 1.42 thorpej static void
315 1.40 briggs nsphy_reset(struct mii_softc *sc)
316 1.40 briggs {
317 1.40 briggs int reg, i;
318 1.40 briggs
319 1.40 briggs if (sc->mii_flags & MIIF_NOISOLATE)
320 1.40 briggs reg = BMCR_RESET;
321 1.40 briggs else
322 1.40 briggs reg = BMCR_RESET | BMCR_ISO;
323 1.40 briggs PHY_WRITE(sc, MII_BMCR, reg);
324 1.40 briggs
325 1.40 briggs /*
326 1.40 briggs * Give it a little time to settle in case we just got power.
327 1.40 briggs * The DP83840A data sheet suggests that a soft reset not happen
328 1.40 briggs * within 500us of power being applied. Be conservative.
329 1.40 briggs */
330 1.40 briggs delay(1000);
331 1.40 briggs
332 1.40 briggs /*
333 1.40 briggs * Wait another 2s for it to complete.
334 1.40 briggs * This is only a little overkill as under normal circumstances
335 1.40 briggs * the PHY can take up to 1s to complete reset.
336 1.40 briggs * This is also a bit odd because after a reset, the BMCR will
337 1.40 briggs * clear the reset bit and simply reports 0 even though the reset
338 1.40 briggs * is not yet complete.
339 1.40 briggs */
340 1.40 briggs for (i = 0; i < 1000; i++) {
341 1.43 perry reg = PHY_READ(sc, MII_BMCR);
342 1.40 briggs if (reg && ((reg & BMCR_RESET) == 0))
343 1.40 briggs break;
344 1.40 briggs delay(2000);
345 1.40 briggs }
346 1.40 briggs
347 1.40 briggs if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0)) {
348 1.40 briggs PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
349 1.40 briggs }
350 1.40 briggs }
351