1 /* $NetBSD: gentbi.c,v 1.15 2006/03/29 07:05:24 thorpej Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-2-Clause
5 *
6 * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc.
7 * All rights reserved.
8 *
9 * This code is derived from software contributed to The NetBSD Foundation
10 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
11 * NASA Ames Research Center.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 /*
36 * Copyright (c) 1997 Manuel Bouyer. All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
48 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
49 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
50 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
51 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
52 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
53 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
54 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
55 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
56 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
57 */
58
59 /*
60 * Driver for generic ten-bit (1000BASE-SX) interfaces, built into
61 * many Gigabit Ethernet chips.
62 *
63 * All we have to do here is correctly report speed and duplex.
64 */
65
66 #include <sys/cdefs.h>
67 /*
68 * Driver for generic unknown ten-bit interfaces(1000BASE-{LX,SX}
69 * fiber interfaces).
70 */
71
72 #include <sys/param.h>
73 #include <sys/systm.h>
74 #include <sys/kernel.h>
75 #include <sys/module.h>
76 #include <sys/socket.h>
77 #include <sys/errno.h>
78 #include <sys/bus.h>
79
80 #include <net/if.h>
81 #include <net/if_media.h>
82
83 #include <dev/mii/mii.h>
84 #include <dev/mii/miivar.h>
85 #include "miidevs.h"
86
87 #include "miibus_if.h"
88
89 static int gentbi_probe(device_t);
90 static int gentbi_attach(device_t);
91
92 static device_method_t gentbi_methods[] = {
93 /* device interface */
94 DEVMETHOD(device_probe, gentbi_probe),
95 DEVMETHOD(device_attach, gentbi_attach),
96 DEVMETHOD(device_detach, mii_phy_detach),
97 DEVMETHOD(device_shutdown, bus_generic_shutdown),
98 DEVMETHOD_END
99 };
100
101 static driver_t gentbi_driver = {
102 "gentbi",
103 gentbi_methods,
104 sizeof(struct mii_softc)
105 };
106
107 DRIVER_MODULE(gentbi, miibus, gentbi_driver, 0, 0);
108
109 static int gentbi_service(struct mii_softc *, struct mii_data *, int);
110 static void gentbi_status(struct mii_softc *);
111
112 static const struct mii_phy_funcs gentbi_funcs = {
113 gentbi_service,
114 gentbi_status,
115 mii_phy_reset
116 };
117
118 static int
gentbi_probe(device_t dev)119 gentbi_probe(device_t dev)
120 {
121 device_t parent;
122 struct mii_attach_args *ma;
123 int bmsr, extsr;
124
125 parent = device_get_parent(dev);
126 ma = device_get_ivars(dev);
127
128 /*
129 * We match as a generic TBI if:
130 *
131 * - There is no media in the BMSR.
132 * - EXTSR has only 1000X.
133 */
134 bmsr = MIIBUS_READREG(parent, ma->mii_phyno, MII_BMSR);
135 if ((bmsr & BMSR_EXTSTAT) == 0 || (bmsr & BMSR_MEDIAMASK) != 0)
136 return (ENXIO);
137
138 extsr = MIIBUS_READREG(parent, ma->mii_phyno, MII_EXTSR);
139 if (extsr & (EXTSR_1000TFDX|EXTSR_1000THDX))
140 return (ENXIO);
141
142 if (extsr & (EXTSR_1000XFDX|EXTSR_1000XHDX)) {
143 /*
144 * We think this is a generic TBI. Return a match
145 * priority higher than ukphy, but lower than what
146 * specific drivers will return.
147 */
148 device_set_desc(dev, "Generic ten-bit interface");
149 return (BUS_PROBE_LOW_PRIORITY);
150 }
151
152 return (ENXIO);
153 }
154
155 static int
gentbi_attach(device_t dev)156 gentbi_attach(device_t dev)
157 {
158 struct mii_softc *sc;
159
160 sc = device_get_softc(dev);
161
162 mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &gentbi_funcs, 0);
163
164 PHY_RESET(sc);
165
166 /*
167 * Mask out all media in the BMSR. We only are really interested
168 * in "auto".
169 */
170 sc->mii_capabilities =
171 PHY_READ(sc, MII_BMSR) & sc->mii_capmask & ~BMSR_MEDIAMASK;
172 if (sc->mii_capabilities & BMSR_EXTSTAT)
173 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
174
175 device_printf(dev, " ");
176 mii_phy_add_media(sc);
177 printf("\n");
178
179 MIIBUS_MEDIAINIT(sc->mii_dev);
180 return (0);
181 }
182
183 static int
gentbi_service(struct mii_softc * sc,struct mii_data * mii,int cmd)184 gentbi_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
185 {
186
187 switch (cmd) {
188 case MII_POLLSTAT:
189 break;
190
191 case MII_MEDIACHG:
192 mii_phy_setmedia(sc);
193 break;
194
195 case MII_TICK:
196 if (mii_phy_tick(sc) == EJUSTRETURN)
197 return (0);
198 break;
199 }
200
201 /* Update the media status. */
202 PHY_STATUS(sc);
203
204 /* Callback if something changed. */
205 mii_phy_update(sc, cmd);
206 return (0);
207 }
208
209 static void
gentbi_status(struct mii_softc * sc)210 gentbi_status(struct mii_softc *sc)
211 {
212 struct mii_data *mii = sc->mii_pdata;
213 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
214 int bmsr, bmcr, anlpar;
215
216 mii->mii_media_status = IFM_AVALID;
217 mii->mii_media_active = IFM_ETHER;
218
219 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
220
221 if (bmsr & BMSR_LINK)
222 mii->mii_media_status |= IFM_ACTIVE;
223
224 bmcr = PHY_READ(sc, MII_BMCR);
225 if (bmcr & BMCR_ISO) {
226 mii->mii_media_active |= IFM_NONE;
227 mii->mii_media_status = 0;
228 return;
229 }
230
231 if (bmcr & BMCR_LOOP)
232 mii->mii_media_active |= IFM_LOOP;
233
234 if (bmcr & BMCR_AUTOEN) {
235 /*
236 * The media status bits are only valid if autonegotiation
237 * has completed (or it's disabled).
238 */
239 if ((bmsr & BMSR_ACOMP) == 0) {
240 /* Erg, still trying, I guess... */
241 mii->mii_media_active |= IFM_NONE;
242 return;
243 }
244
245 /*
246 * The media is always 1000baseSX. Check the ANLPAR to
247 * see if we're doing full-duplex.
248 */
249 mii->mii_media_active |= IFM_1000_SX;
250 anlpar = PHY_READ(sc, MII_ANLPAR);
251 if ((sc->mii_extcapabilities & EXTSR_1000XFDX) != 0 &&
252 (anlpar & ANLPAR_X_FD) != 0)
253 mii->mii_media_active |=
254 IFM_FDX | mii_phy_flowstatus(sc);
255 else
256 mii->mii_media_active |= IFM_HDX;
257 } else
258 mii->mii_media_active = ife->ifm_media;
259 }
260