1 | /* $NetBSD: nsphyter.c,v 1.39 2016/07/07 06:55:41 msaitoh Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, |
9 | * NASA Ames Research Center. |
10 | * |
11 | * Redistribution and use in source and binary forms, with or without |
12 | * modification, are permitted provided that the following conditions |
13 | * are met: |
14 | * 1. Redistributions of source code must retain the above copyright |
15 | * notice, this list of conditions and the following disclaimer. |
16 | * 2. Redistributions in binary form must reproduce the above copyright |
17 | * notice, this list of conditions and the following disclaimer in the |
18 | * documentation and/or other materials provided with the distribution. |
19 | * |
20 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
22 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
23 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
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 THE |
30 | * POSSIBILITY OF SUCH DAMAGE. |
31 | */ |
32 | |
33 | /* |
34 | * Copyright (c) 1997 Manuel Bouyer. All rights reserved. |
35 | * |
36 | * Redistribution and use in source and binary forms, with or without |
37 | * modification, are permitted provided that the following conditions |
38 | * are met: |
39 | * 1. Redistributions of source code must retain the above copyright |
40 | * notice, this list of conditions and the following disclaimer. |
41 | * 2. Redistributions in binary form must reproduce the above copyright |
42 | * notice, this list of conditions and the following disclaimer in the |
43 | * documentation and/or other materials provided with the distribution. |
44 | * |
45 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
46 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
47 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
48 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
49 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
50 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
51 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
52 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
53 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
54 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
55 | */ |
56 | |
57 | /* |
58 | * driver for National Semiconductor's DP83843 `PHYTER' ethernet 10/100 PHY |
59 | * Data Sheet available from www.national.com |
60 | * |
61 | * We also support the DP83815 MacPHYER internal PHY since, for our |
62 | * purposes, they are compatible. |
63 | */ |
64 | |
65 | #include <sys/cdefs.h> |
66 | __KERNEL_RCSID(0, "$NetBSD: nsphyter.c,v 1.39 2016/07/07 06:55:41 msaitoh Exp $" ); |
67 | |
68 | #include <sys/param.h> |
69 | #include <sys/systm.h> |
70 | #include <sys/kernel.h> |
71 | #include <sys/device.h> |
72 | #include <sys/socket.h> |
73 | #include <sys/errno.h> |
74 | |
75 | #include <net/if.h> |
76 | #include <net/if_media.h> |
77 | |
78 | #include <dev/mii/mii.h> |
79 | #include <dev/mii/miivar.h> |
80 | #include <dev/mii/miidevs.h> |
81 | |
82 | #include <dev/mii/nsphyterreg.h> |
83 | |
84 | static int nsphytermatch(device_t, cfdata_t, void *); |
85 | static void nsphyterattach(device_t, device_t, void *); |
86 | |
87 | CFATTACH_DECL3_NEW(nsphyter, sizeof(struct mii_softc), |
88 | nsphytermatch, nsphyterattach, mii_phy_detach, mii_phy_activate, NULL, |
89 | NULL, DVF_DETACH_SHUTDOWN); |
90 | |
91 | static int nsphyter_service(struct mii_softc *, struct mii_data *, int); |
92 | static void nsphyter_status(struct mii_softc *); |
93 | static void nsphyter_reset(struct mii_softc *); |
94 | |
95 | static const struct mii_phy_funcs nsphyter_funcs = { |
96 | nsphyter_service, nsphyter_status, nsphyter_reset, |
97 | }; |
98 | |
99 | static const struct mii_phydesc nsphyters[] = { |
100 | { MII_OUI_xxNATSEMI, MII_MODEL_xxNATSEMI_DP83843, |
101 | MII_STR_xxNATSEMI_DP83843 }, |
102 | |
103 | { MII_OUI_xxNATSEMI, MII_MODEL_xxNATSEMI_DP83847, |
104 | MII_STR_xxNATSEMI_DP83847 }, |
105 | |
106 | { MII_OUI_xxNATSEMI, MII_MODEL_xxNATSEMI_DP83849, |
107 | MII_STR_xxNATSEMI_DP83849 }, |
108 | |
109 | { MII_OUI_xxNATSEMI, MII_MODEL_xxNATSEMI_DP83815, |
110 | MII_STR_xxNATSEMI_DP83815 }, |
111 | |
112 | { 0, 0, |
113 | NULL }, |
114 | }; |
115 | |
116 | static int |
117 | nsphytermatch(device_t parent, cfdata_t match, void *aux) |
118 | { |
119 | struct mii_attach_args *ma = aux; |
120 | |
121 | if (mii_phy_match(ma, nsphyters) != NULL) |
122 | return (10); |
123 | |
124 | return (0); |
125 | } |
126 | |
127 | static void |
128 | nsphyterattach(device_t parent, device_t self, void *aux) |
129 | { |
130 | struct mii_softc *sc = device_private(self); |
131 | struct mii_attach_args *ma = aux; |
132 | struct mii_data *mii = ma->mii_data; |
133 | const struct mii_phydesc *mpd; |
134 | |
135 | mpd = mii_phy_match(ma, nsphyters); |
136 | aprint_naive(": Media interface\n" ); |
137 | aprint_normal(": %s, rev. %d\n" , mpd->mpd_name, MII_REV(ma->mii_id2)); |
138 | |
139 | sc->mii_dev = self; |
140 | sc->mii_inst = mii->mii_instance; |
141 | sc->mii_phy = ma->mii_phyno; |
142 | sc->mii_funcs = &nsphyter_funcs; |
143 | sc->mii_pdata = mii; |
144 | sc->mii_flags = ma->mii_flags; |
145 | sc->mii_anegticks = MII_ANEGTICKS; |
146 | |
147 | PHY_RESET(sc); |
148 | |
149 | sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; |
150 | aprint_normal_dev(self, "" ); |
151 | if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) |
152 | aprint_error("no media present" ); |
153 | else |
154 | mii_phy_add_media(sc); |
155 | aprint_normal("\n" ); |
156 | } |
157 | |
158 | static int |
159 | nsphyter_service(struct mii_softc *sc, struct mii_data *mii, int cmd) |
160 | { |
161 | struct ifmedia_entry *ife = mii->mii_media.ifm_cur; |
162 | int reg; |
163 | |
164 | switch (cmd) { |
165 | case MII_POLLSTAT: |
166 | /* |
167 | * If we're not polling our PHY instance, just return. |
168 | */ |
169 | if (IFM_INST(ife->ifm_media) != sc->mii_inst) |
170 | return (0); |
171 | break; |
172 | |
173 | case MII_MEDIACHG: |
174 | /* |
175 | * If the media indicates a different PHY instance, |
176 | * isolate ourselves. |
177 | */ |
178 | if (IFM_INST(ife->ifm_media) != sc->mii_inst) { |
179 | reg = PHY_READ(sc, MII_BMCR); |
180 | PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); |
181 | return (0); |
182 | } |
183 | |
184 | /* |
185 | * If the interface is not up, don't do anything. |
186 | */ |
187 | if ((mii->mii_ifp->if_flags & IFF_UP) == 0) |
188 | break; |
189 | |
190 | mii_phy_setmedia(sc); |
191 | break; |
192 | |
193 | case MII_TICK: |
194 | /* |
195 | * If we're not currently selected, just return. |
196 | */ |
197 | if (IFM_INST(ife->ifm_media) != sc->mii_inst) |
198 | return (0); |
199 | |
200 | if (mii_phy_tick(sc) == EJUSTRETURN) |
201 | return (0); |
202 | break; |
203 | |
204 | case MII_DOWN: |
205 | mii_phy_down(sc); |
206 | return (0); |
207 | } |
208 | |
209 | /* Update the media status. */ |
210 | mii_phy_status(sc); |
211 | |
212 | /* Callback if something changed. */ |
213 | mii_phy_update(sc, cmd); |
214 | return (0); |
215 | } |
216 | |
217 | static void |
218 | nsphyter_status(struct mii_softc *sc) |
219 | { |
220 | struct mii_data *mii = sc->mii_pdata; |
221 | struct ifmedia_entry *ife = mii->mii_media.ifm_cur; |
222 | int bmsr, bmcr, physts; |
223 | |
224 | mii->mii_media_status = IFM_AVALID; |
225 | mii->mii_media_active = IFM_ETHER; |
226 | |
227 | bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); |
228 | physts = PHY_READ(sc, MII_NSPHYTER_PHYSTS); |
229 | |
230 | if (physts & PHYSTS_LINK) |
231 | mii->mii_media_status |= IFM_ACTIVE; |
232 | |
233 | bmcr = PHY_READ(sc, MII_BMCR); |
234 | if (bmcr & BMCR_ISO) { |
235 | mii->mii_media_active |= IFM_NONE; |
236 | mii->mii_media_status = 0; |
237 | return; |
238 | } |
239 | |
240 | if (bmcr & BMCR_LOOP) |
241 | mii->mii_media_active |= IFM_LOOP; |
242 | |
243 | if (bmcr & BMCR_AUTOEN) { |
244 | /* |
245 | * The media status bits are only valid if autonegotiation |
246 | * has completed (or it's disabled). |
247 | */ |
248 | if ((bmsr & BMSR_ACOMP) == 0) { |
249 | /* Erg, still trying, I guess... */ |
250 | mii->mii_media_active |= IFM_NONE; |
251 | return; |
252 | } |
253 | |
254 | if (physts & PHYSTS_SPEED10) |
255 | mii->mii_media_active |= IFM_10_T; |
256 | else |
257 | mii->mii_media_active |= IFM_100_TX; |
258 | |
259 | if (physts & PHYSTS_DUPLEX) |
260 | mii->mii_media_active |= |
261 | IFM_FDX | mii_phy_flowstatus(sc); |
262 | else |
263 | mii->mii_media_active |= IFM_HDX; |
264 | } else |
265 | mii->mii_media_active = ife->ifm_media; |
266 | } |
267 | |
268 | void |
269 | nsphyter_reset(struct mii_softc *sc) |
270 | { |
271 | int reg, i; |
272 | |
273 | if (sc->mii_flags & MIIF_NOISOLATE) |
274 | reg = BMCR_RESET; |
275 | else |
276 | reg = BMCR_RESET | BMCR_ISO; |
277 | PHY_WRITE(sc, MII_BMCR, reg); |
278 | |
279 | /* |
280 | * It is best to allow a little time for the reset to settle |
281 | * in before we start polling the BMCR again. Notably, the |
282 | * DP83840A manual states that there should be a 500us delay |
283 | * between asserting software reset and attempting MII serial |
284 | * operations. Also, a DP83815 can get into a bad state on |
285 | * cable removal and reinsertion if we do not delay here. |
286 | */ |
287 | delay(500); |
288 | |
289 | /* Wait another 100ms for it to complete. */ |
290 | for (i = 0; i < 100; i++) { |
291 | reg = PHY_READ(sc, MII_BMCR); |
292 | if ((reg & BMCR_RESET) == 0) |
293 | break; |
294 | delay(1000); |
295 | } |
296 | |
297 | if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0)) |
298 | PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); |
299 | } |
300 | |