1/* $NetBSD: iophy.c,v 1.38 2016/07/07 06:55:41 msaitoh Exp $ */
2
3/*
4 * Copyright (c) 1998, 1999, 2000 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 * Intel 82553 PHY driver
59 */
60
61#include <sys/cdefs.h>
62__KERNEL_RCSID(0, "$NetBSD: iophy.c,v 1.38 2016/07/07 06:55:41 msaitoh Exp $");
63
64#include <sys/param.h>
65#include <sys/systm.h>
66#include <sys/kernel.h>
67#include <sys/device.h>
68#include <sys/socket.h>
69
70#include <net/if.h>
71#include <net/if_media.h>
72
73#include <dev/mii/mii.h>
74#include <dev/mii/miivar.h>
75#include <dev/mii/miidevs.h>
76
77#include <dev/mii/iophyreg.h>
78
79static int iophymatch(device_t, cfdata_t, void *);
80static void iophyattach(device_t, device_t, void *);
81
82CFATTACH_DECL_NEW(iophy, sizeof(struct mii_softc),
83 iophymatch, iophyattach, mii_phy_detach, mii_phy_activate);
84
85static int iophy_service(struct mii_softc *, struct mii_data *, int);
86static void iophy_status(struct mii_softc *);
87
88static const struct mii_phy_funcs iophy_funcs = {
89 iophy_service, iophy_status, mii_phy_reset,
90};
91
92static const struct mii_phydesc iophys[] = {
93 { MII_OUI_xxINTEL, MII_MODEL_xxINTEL_I82553,
94 MII_STR_xxINTEL_I82553 },
95
96 { MII_OUI_yyINTEL, MII_MODEL_yyINTEL_I82553,
97 MII_STR_yyINTEL_I82553 },
98
99 { 0, 0,
100 NULL },
101};
102
103static int
104iophymatch(device_t parent, cfdata_t match, void *aux)
105{
106 struct mii_attach_args *ma = aux;
107
108 if (mii_phy_match(ma, iophys) != NULL)
109 return (10);
110
111 return (0);
112}
113
114static void
115iophyattach(device_t parent, device_t self, void *aux)
116{
117 struct mii_softc *sc = device_private(self);
118 struct mii_attach_args *ma = aux;
119 struct mii_data *mii = ma->mii_data;
120 const struct mii_phydesc *mpd;
121
122 mpd = mii_phy_match(ma, iophys);
123 aprint_naive(": Media interface\n");
124 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
125
126 sc->mii_dev = self;
127 sc->mii_inst = mii->mii_instance;
128 sc->mii_phy = ma->mii_phyno;
129 sc->mii_funcs = &iophy_funcs;
130 sc->mii_pdata = mii;
131 sc->mii_flags = ma->mii_flags;
132 sc->mii_anegticks = MII_ANEGTICKS;
133
134 PHY_RESET(sc);
135
136 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
137 aprint_normal_dev(self, "");
138 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
139 aprint_error("no media present");
140 else
141 mii_phy_add_media(sc);
142 aprint_normal("\n");
143}
144
145static int
146iophy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
147{
148 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
149 int reg;
150
151 switch (cmd) {
152 case MII_POLLSTAT:
153 /*
154 * If we're not polling our PHY instance, just return.
155 */
156 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
157 return (0);
158 break;
159
160 case MII_MEDIACHG:
161 /*
162 * If the media indicates a different PHY instance,
163 * isolate ourselves.
164 */
165 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
166 reg = PHY_READ(sc, MII_BMCR);
167 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
168 return (0);
169 }
170
171 /*
172 * If the interface is not up, don't do anything.
173 */
174 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
175 break;
176
177 mii_phy_setmedia(sc);
178 break;
179
180 case MII_TICK:
181 /*
182 * If we're not currently selected, just return.
183 */
184 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
185 return (0);
186
187 if (mii_phy_tick(sc) == EJUSTRETURN)
188 return (0);
189 break;
190
191 case MII_DOWN:
192 mii_phy_down(sc);
193 return (0);
194 }
195
196 /* Update the media status. */
197 mii_phy_status(sc);
198
199 /* Callback if something changed. */
200 mii_phy_update(sc, cmd);
201 return (0);
202}
203
204static void
205iophy_status(struct mii_softc *sc)
206{
207 struct mii_data *mii = sc->mii_pdata;
208 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
209 int bmsr, bmcr, ext0;
210
211 mii->mii_media_status = IFM_AVALID;
212 mii->mii_media_active = IFM_ETHER;
213
214 bmsr = PHY_READ(sc, MII_BMSR) |
215 PHY_READ(sc, MII_BMSR);
216 if (bmsr & BMSR_LINK)
217 mii->mii_media_status |= IFM_ACTIVE;
218
219 bmcr = PHY_READ(sc, MII_BMCR);
220 if (bmcr & BMCR_ISO) {
221 mii->mii_media_active |= IFM_NONE;
222 mii->mii_media_status = 0;
223 return;
224 }
225
226 if (bmcr & BMCR_LOOP)
227 mii->mii_media_active |= IFM_LOOP;
228
229 if (bmcr & BMCR_AUTOEN) {
230 if ((bmsr & BMSR_ACOMP) == 0) {
231 /* Erg, still trying, I guess... */
232 mii->mii_media_active |= IFM_NONE;
233 return;
234 }
235 ext0 = PHY_READ(sc, MII_IOPHY_EXT0);
236
237 if (ext0 & EXT0_SPEED) {
238 if ((bmsr & BMSR_100TXFDX) || (bmsr & BMSR_100TXHDX)) {
239 mii->mii_media_active |= IFM_100_TX;
240 } else if (bmsr & BMSR_100T4) {
241 mii->mii_media_active |= IFM_100_T4;
242 }
243 } else
244 mii->mii_media_active |= IFM_10_T;
245
246 if (ext0 & EXT0_DUPLEX)
247 mii->mii_media_active |= IFM_FDX;
248 else
249 mii->mii_media_active |= IFM_HDX;
250 } else
251 mii->mii_media_active = ife->ifm_media;
252}
253