FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/rlphy.c
1 /*-
2 * Copyright (c) 1997, 1998, 1999
3 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Bill Paul.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD: releng/8.4/sys/dev/mii/rlphy.c 230718 2012-01-29 01:35:14Z marius $");
35
36 /*
37 * driver for RealTek 8139 internal PHYs
38 */
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/kernel.h>
43 #include <sys/module.h>
44 #include <sys/socket.h>
45 #include <sys/bus.h>
46
47 #include <net/if.h>
48 #include <net/if_arp.h>
49 #include <net/if_media.h>
50
51 #include <dev/mii/mii.h>
52 #include <dev/mii/miivar.h>
53 #include "miidevs.h"
54
55 #include <machine/bus.h>
56 #include <pci/if_rlreg.h>
57
58 #include "miibus_if.h"
59
60 struct rlphy_softc {
61 struct mii_softc sc_mii; /* generic PHY */
62 int sc_is_RTL8201L; /* is an external RTL8201L PHY */
63 };
64
65 static int rlphy_probe(device_t);
66 static int rlphy_attach(device_t);
67
68 static device_method_t rlphy_methods[] = {
69 /* device interface */
70 DEVMETHOD(device_probe, rlphy_probe),
71 DEVMETHOD(device_attach, rlphy_attach),
72 DEVMETHOD(device_detach, mii_phy_detach),
73 DEVMETHOD(device_shutdown, bus_generic_shutdown),
74 DEVMETHOD_END
75 };
76
77 static devclass_t rlphy_devclass;
78
79 static driver_t rlphy_driver = {
80 "rlphy",
81 rlphy_methods,
82 sizeof(struct rlphy_softc)
83 };
84
85 DRIVER_MODULE(rlphy, miibus, rlphy_driver, rlphy_devclass, 0, 0);
86
87 static int rlphy_service(struct mii_softc *, struct mii_data *, int);
88 static void rlphy_status(struct mii_softc *);
89
90 /*
91 * RealTek internal PHYs don't have vendor/device ID registers;
92 * re(4) and rl(4) fake up a return value of all zeros.
93 */
94 static const struct mii_phydesc rlintphys[] = {
95 { 0, 0, "RealTek internal media interface" },
96 MII_PHY_END
97 };
98
99 static const struct mii_phydesc rlphys[] = {
100 MII_PHY_DESC(REALTEK, RTL8201L),
101 MII_PHY_DESC(ICPLUS, IP101),
102 MII_PHY_END
103 };
104
105 static int
106 rlphy_probe(device_t dev)
107 {
108 const char *nic;
109 int rv;
110
111 rv = mii_phy_dev_probe(dev, rlphys, BUS_PROBE_DEFAULT);
112 if (rv <= 0)
113 return (rv);
114
115 nic = device_get_name(device_get_parent(device_get_parent(dev)));
116 if (strcmp(nic, "rl") == 0 || strcmp(nic, "re") == 0)
117 return (mii_phy_dev_probe(dev, rlintphys, BUS_PROBE_DEFAULT));
118 return (ENXIO);
119 }
120
121 static int
122 rlphy_attach(device_t dev)
123 {
124 struct mii_softc *sc;
125 struct mii_attach_args *ma;
126 struct mii_data *mii;
127 struct rlphy_softc *rsc;
128
129 sc = device_get_softc(dev);
130 ma = device_get_ivars(dev);
131 sc->mii_dev = device_get_parent(dev);
132 mii = ma->mii_data;
133
134 /*
135 * Check whether we're the RTL8201L PHY and remember so the status
136 * routine can query the proper register for speed detection.
137 */
138 rsc = (struct rlphy_softc *)sc;
139 if (mii_phy_dev_probe(dev, rlphys, 0) == 0)
140 rsc->sc_is_RTL8201L++;
141
142 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
143
144 sc->mii_flags = miibus_get_flags(dev);
145 sc->mii_inst = mii->mii_instance++;
146 sc->mii_phy = ma->mii_phyno;
147 sc->mii_service = rlphy_service;
148 sc->mii_pdata = mii;
149
150 /*
151 * The RealTek PHY can never be isolated.
152 */
153 sc->mii_flags |= MIIF_NOISOLATE | MIIF_NOMANPAUSE;
154
155 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
156
157 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
158 MII_MEDIA_100_TX);
159
160 mii_phy_reset(sc);
161
162 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
163 device_printf(dev, " ");
164 mii_phy_add_media(sc);
165 printf("\n");
166 #undef ADD
167 MIIBUS_MEDIAINIT(sc->mii_dev);
168 return (0);
169 }
170
171 static int
172 rlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
173 {
174
175 switch (cmd) {
176 case MII_POLLSTAT:
177 break;
178
179 case MII_MEDIACHG:
180 /*
181 * If the interface is not up, don't do anything.
182 */
183 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
184 break;
185
186 mii_phy_setmedia(sc);
187 break;
188
189 case MII_TICK:
190 /*
191 * Is the interface even up?
192 */
193 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
194 return (0);
195
196 /*
197 * The RealTek PHY's autonegotiation doesn't need to be
198 * kicked; it continues in the background.
199 */
200 break;
201 }
202
203 /* Update the media status. */
204 rlphy_status(sc);
205
206 /* Callback if something changed. */
207 mii_phy_update(sc, cmd);
208 return (0);
209 }
210
211 static void
212 rlphy_status(struct mii_softc *phy)
213 {
214 struct rlphy_softc *rsc =(struct rlphy_softc *)phy;
215 struct mii_data *mii = phy->mii_pdata;
216 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
217 int bmsr, bmcr, anlpar;
218
219 mii->mii_media_status = IFM_AVALID;
220 mii->mii_media_active = IFM_ETHER;
221
222 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
223 if (bmsr & BMSR_LINK)
224 mii->mii_media_status |= IFM_ACTIVE;
225
226 bmcr = PHY_READ(phy, MII_BMCR);
227 if (bmcr & BMCR_ISO) {
228 mii->mii_media_active |= IFM_NONE;
229 mii->mii_media_status = 0;
230 return;
231 }
232
233 if (bmcr & BMCR_LOOP)
234 mii->mii_media_active |= IFM_LOOP;
235
236 if (bmcr & BMCR_AUTOEN) {
237 /*
238 * NWay autonegotiation takes the highest-order common
239 * bit of the ANAR and ANLPAR (i.e. best media advertised
240 * both by us and our link partner).
241 */
242 if ((bmsr & BMSR_ACOMP) == 0) {
243 /* Erg, still trying, I guess... */
244 mii->mii_media_active |= IFM_NONE;
245 return;
246 }
247
248 if ((anlpar = PHY_READ(phy, MII_ANAR) &
249 PHY_READ(phy, MII_ANLPAR))) {
250 if (anlpar & ANLPAR_TX_FD)
251 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
252 else if (anlpar & ANLPAR_T4)
253 mii->mii_media_active |= IFM_100_T4|IFM_HDX;
254 else if (anlpar & ANLPAR_TX)
255 mii->mii_media_active |= IFM_100_TX|IFM_HDX;
256 else if (anlpar & ANLPAR_10_FD)
257 mii->mii_media_active |= IFM_10_T|IFM_FDX;
258 else if (anlpar & ANLPAR_10)
259 mii->mii_media_active |= IFM_10_T|IFM_HDX;
260 else
261 mii->mii_media_active |= IFM_NONE;
262 if ((mii->mii_media_active & IFM_FDX) != 0)
263 mii->mii_media_active |=
264 mii_phy_flowstatus(phy);
265 return;
266 }
267 /*
268 * If the other side doesn't support NWAY, then the
269 * best we can do is determine if we have a 10Mbps or
270 * 100Mbps link. There's no way to know if the link
271 * is full or half duplex, so we default to half duplex
272 * and hope that the user is clever enough to manually
273 * change the media settings if we're wrong.
274 */
275
276 /*
277 * The RealTek PHY supports non-NWAY link speed
278 * detection, however it does not report the link
279 * detection results via the ANLPAR or BMSR registers.
280 * (What? RealTek doesn't do things the way everyone
281 * else does? I'm just shocked, shocked I tell you.)
282 * To determine the link speed, we have to do one
283 * of two things:
284 *
285 * - If this is a standalone RealTek RTL8201(L) or
286 * workalike PHY, we can determine the link speed by
287 * testing bit 0 in the magic, vendor-specific register
288 * at offset 0x19.
289 *
290 * - If this is a RealTek MAC with integrated PHY, we
291 * can test the 'SPEED10' bit of the MAC's media status
292 * register.
293 */
294 if (rsc->sc_is_RTL8201L) {
295 if (PHY_READ(phy, 0x0019) & 0x01)
296 mii->mii_media_active |= IFM_100_TX;
297 else
298 mii->mii_media_active |= IFM_10_T;
299 } else {
300 if (PHY_READ(phy, RL_MEDIASTAT) &
301 RL_MEDIASTAT_SPEED10)
302 mii->mii_media_active |= IFM_10_T;
303 else
304 mii->mii_media_active |= IFM_100_TX;
305 }
306 mii->mii_media_active |= IFM_HDX;
307 } else
308 mii->mii_media_active = ife->ifm_media;
309 }
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