Line data Source code
1 : /* $OpenBSD: rlphy.c,v 1.33 2014/11/24 00:13:42 brad Exp $ */
2 :
3 : /*
4 : * Copyright (c) 1998, 1999 Jason L. Wright (jason@thought.net)
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 ``AS IS'' AND ANY EXPRESS OR
17 : * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 : * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 : * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 : * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 : * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 : * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 : * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
25 : * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 : * POSSIBILITY OF SUCH DAMAGE.
27 : */
28 :
29 : /*
30 : * Driver for the internal PHY found on RTL8139 based nics, based
31 : * on drivers for the 'exphy' (Internal 3Com phys) and 'nsphy'
32 : * (National Semiconductor DP83840).
33 : */
34 :
35 : #include <sys/param.h>
36 : #include <sys/systm.h>
37 : #include <sys/kernel.h>
38 : #include <sys/device.h>
39 : #include <sys/socket.h>
40 : #include <sys/errno.h>
41 :
42 : #include <machine/bus.h>
43 :
44 : #include <net/if.h>
45 : #include <net/if_media.h>
46 :
47 : #include <netinet/in.h>
48 : #include <netinet/if_ether.h>
49 :
50 : #include <dev/mii/mii.h>
51 : #include <dev/mii/miivar.h>
52 : #include <dev/mii/miidevs.h>
53 :
54 : #include <dev/ic/rtl81x9reg.h>
55 :
56 : int rlphymatch(struct device *, void *, void *);
57 : void rlphyattach(struct device *, struct device *, void *);
58 :
59 : struct cfattach rlphy_ca = {
60 : sizeof(struct mii_softc), rlphymatch, rlphyattach, mii_phy_detach
61 : };
62 :
63 : struct cfdriver rlphy_cd = {
64 : NULL, "rlphy", DV_DULL
65 : };
66 :
67 : int rlphy_service(struct mii_softc *, struct mii_data *, int);
68 : void rlphy_status(struct mii_softc *);
69 :
70 : const struct mii_phy_funcs rlphy_funcs = {
71 : rlphy_service, rlphy_status, mii_phy_reset,
72 : };
73 :
74 : static const struct mii_phydesc rlphys[] = {
75 : { MII_OUI_REALTEK, MII_MODEL_REALTEK_RTL8201L,
76 : MII_STR_REALTEK_RTL8201L },
77 : { MII_OUI_xxREALTEK, MII_MODEL_xxREALTEK_RTL8201E,
78 : MII_STR_xxREALTEK_RTL8201E },
79 : { MII_OUI_ICPLUS, MII_MODEL_ICPLUS_IP101,
80 : MII_STR_ICPLUS_IP101 },
81 :
82 : { 0, 0,
83 : NULL },
84 : };
85 : int
86 0 : rlphymatch(struct device *parent, void *match, void *aux)
87 : {
88 0 : struct mii_attach_args *ma = aux;
89 : char *devname;
90 :
91 0 : devname = parent->dv_cfdata->cf_driver->cd_name;
92 :
93 0 : if (mii_phy_match(ma, rlphys) != NULL)
94 0 : return (10);
95 :
96 0 : if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 ||
97 0 : MII_MODEL(ma->mii_id2) != 0)
98 0 : return (0);
99 :
100 0 : if ((strcmp(devname, "re") != 0) &&
101 0 : (strcmp(devname, "rl") != 0))
102 0 : return (0);
103 :
104 : /*
105 : * A "real" phy should get preference, but on the 8139 there
106 : * is no phyid register.
107 : */
108 0 : return (5);
109 0 : }
110 :
111 : void
112 0 : rlphyattach(struct device *parent, struct device *self, void *aux)
113 : {
114 0 : struct mii_softc *sc = (struct mii_softc *)self;
115 0 : struct mii_attach_args *ma = aux;
116 0 : struct mii_data *mii = ma->mii_data;
117 : const struct mii_phydesc *mpd;
118 :
119 0 : mpd = mii_phy_match(ma, rlphys);
120 0 : if (mpd != NULL) {
121 0 : printf(": %s, rev. %d\n", mpd->mpd_name,
122 0 : MII_REV(ma->mii_id2));
123 0 : } else
124 0 : printf(": RTL internal PHY\n");
125 :
126 0 : sc->mii_inst = mii->mii_instance;
127 0 : sc->mii_phy = ma->mii_phyno;
128 0 : sc->mii_funcs = &rlphy_funcs;
129 0 : sc->mii_pdata = mii;
130 0 : sc->mii_flags = ma->mii_flags;
131 :
132 0 : sc->mii_flags |= MIIF_NOISOLATE;
133 :
134 0 : PHY_RESET(sc);
135 :
136 0 : sc->mii_capabilities =
137 0 : PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
138 0 : if (sc->mii_capabilities & BMSR_MEDIAMASK)
139 0 : mii_phy_add_media(sc);
140 0 : }
141 :
142 : int
143 0 : rlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
144 : {
145 0 : struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
146 :
147 0 : if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
148 0 : return (ENXIO);
149 :
150 : /*
151 : * Can't isolate the RTL8139 phy, so it has to be the only one.
152 : */
153 0 : if (IFM_INST(ife->ifm_media) != sc->mii_inst)
154 0 : panic("rlphy_service: attempt to isolate phy");
155 :
156 0 : switch (cmd) {
157 : case MII_POLLSTAT:
158 : break;
159 :
160 : case MII_MEDIACHG:
161 : /*
162 : * If the interface is not up, don't do anything.
163 : */
164 0 : if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
165 : break;
166 :
167 0 : switch (IFM_SUBTYPE(ife->ifm_media)) {
168 : case IFM_AUTO:
169 : /*
170 : * If we're already in auto mode, just return.
171 : */
172 0 : if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN)
173 0 : return (0);
174 0 : (void) mii_phy_auto(sc, 0);
175 0 : break;
176 : case IFM_100_T4:
177 : /*
178 : * XXX Not supported as a manual setting right now.
179 : */
180 0 : return (EINVAL);
181 : default:
182 : /*
183 : * BMCR data is stored in the ifmedia entry.
184 : */
185 0 : PHY_WRITE(sc, MII_ANAR,
186 : mii_anar(ife->ifm_media));
187 0 : PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
188 0 : }
189 : break;
190 :
191 : case MII_TICK:
192 : /*
193 : * Is the interface even up?
194 : */
195 0 : if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
196 0 : return (0);
197 :
198 : /*
199 : * The Realtek PHY's autonegotiation doesn't need to be
200 : * kicked; it continues in the background.
201 : */
202 : break;
203 :
204 : case MII_DOWN:
205 0 : mii_phy_down(sc);
206 0 : return (0);
207 : }
208 :
209 : /* Update the media status. */
210 0 : mii_phy_status(sc);
211 :
212 : /* Callback if something changed. */
213 0 : mii_phy_update(sc, cmd);
214 0 : return (0);
215 0 : }
216 :
217 : void
218 0 : rlphy_status(struct mii_softc *sc)
219 : {
220 0 : struct mii_data *mii = sc->mii_pdata;
221 0 : struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
222 : int bmsr, bmcr, anlpar;
223 : char *devname;
224 :
225 0 : devname = sc->mii_dev.dv_parent->dv_cfdata->cf_driver->cd_name;
226 :
227 0 : mii->mii_media_status = IFM_AVALID;
228 0 : mii->mii_media_active = IFM_ETHER;
229 :
230 0 : bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
231 0 : if (bmsr & BMSR_LINK)
232 0 : mii->mii_media_status |= IFM_ACTIVE;
233 :
234 0 : bmcr = PHY_READ(sc, MII_BMCR);
235 0 : if (bmcr & BMCR_ISO) {
236 0 : mii->mii_media_active |= IFM_NONE;
237 0 : mii->mii_media_status = 0;
238 0 : return;
239 : }
240 :
241 0 : if (bmcr & BMCR_LOOP)
242 0 : mii->mii_media_active |= IFM_LOOP;
243 :
244 0 : if (bmcr & BMCR_AUTOEN) {
245 : /*
246 : * NWay autonegotiation takes the highest-order common
247 : * bit of the ANAR and ANLPAR (i.e. best media advertised
248 : * both by us and our link partner).
249 : */
250 0 : if ((bmsr & BMSR_ACOMP) == 0) {
251 : /* Erg, still trying, I guess... */
252 0 : mii->mii_media_active |= IFM_NONE;
253 0 : return;
254 : }
255 :
256 0 : if ((anlpar = PHY_READ(sc, MII_ANAR) &
257 0 : PHY_READ(sc, MII_ANLPAR))) {
258 0 : if (anlpar & ANLPAR_TX_FD)
259 0 : mii->mii_media_active |= IFM_100_TX|IFM_FDX;
260 0 : else if (anlpar & ANLPAR_T4)
261 0 : mii->mii_media_active |= IFM_100_T4|IFM_HDX;
262 0 : else if (anlpar & ANLPAR_TX)
263 0 : mii->mii_media_active |= IFM_100_TX|IFM_HDX;
264 0 : else if (anlpar & ANLPAR_10_FD)
265 0 : mii->mii_media_active |= IFM_10_T|IFM_FDX;
266 0 : else if (anlpar & ANLPAR_10)
267 0 : mii->mii_media_active |= IFM_10_T|IFM_HDX;
268 : else
269 0 : mii->mii_media_active |= IFM_NONE;
270 0 : return;
271 : }
272 :
273 : /*
274 : * If the other side doesn't support NWAY, then the
275 : * best we can do is determine if we have a 10Mbps or
276 : * 100Mbps link. There's no way to know if the link
277 : * is full or half duplex, so we default to half duplex
278 : * and hope that the user is clever enough to manually
279 : * change the media settings if we're wrong.
280 : */
281 :
282 : /*
283 : * The Realtek PHY supports non-NWAY link speed
284 : * detection, however it does not report the link
285 : * detection results via the ANLPAR or BMSR registers.
286 : * (What? Realtek doesn't do things the way everyone
287 : * else does? I'm just shocked, shocked I tell you.)
288 : * To determine the link speed, we have to do one
289 : * of two things:
290 : *
291 : * - If this is a standalone Realtek RTL8201(L) PHY,
292 : * we can determine the link speed by testing bit 0
293 : * in the magic, vendor-specific register at offset
294 : * 0x19.
295 : *
296 : * - If this is a Realtek MAC with integrated PHY, we
297 : * can test the 'SPEED10' bit of the MAC's media status
298 : * register.
299 : */
300 0 : if (strcmp("rl", devname) == 0 ||
301 0 : strcmp("re", devname) == 0) {
302 0 : if (PHY_READ(sc, RL_MEDIASTAT) & RL_MEDIASTAT_SPEED10)
303 0 : mii->mii_media_active |= IFM_10_T;
304 : else
305 0 : mii->mii_media_active |= IFM_100_TX;
306 : } else {
307 0 : if (PHY_READ(sc, 0x0019) & 0x01)
308 0 : mii->mii_media_active |= IFM_100_TX;
309 : else
310 0 : mii->mii_media_active |= IFM_10_T;
311 : }
312 0 : mii->mii_media_active |= IFM_HDX;
313 0 : } else
314 0 : mii->mii_media_active = ife->ifm_media;
315 0 : }
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