1/* $NetBSD: tqphy.c,v 1.40 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 * TDK TSC78Q2120 PHY driver
59 *
60 * Documentation available at http://www.tsc.tdk.com/lan/78Q2120.pdf .
61 */
62
63#include <sys/cdefs.h>
64__KERNEL_RCSID(0, "$NetBSD: tqphy.c,v 1.40 2016/07/07 06:55:41 msaitoh Exp $");
65
66#include <sys/param.h>
67#include <sys/systm.h>
68#include <sys/kernel.h>
69#include <sys/device.h>
70#include <sys/socket.h>
71
72#include <net/if.h>
73#include <net/if_media.h>
74
75#include <dev/mii/mii.h>
76#include <dev/mii/miivar.h>
77#include <dev/mii/miidevs.h>
78
79#include <dev/mii/tqphyreg.h>
80
81static int tqphymatch(device_t, cfdata_t, void *);
82static void tqphyattach(device_t, device_t, void *);
83
84CFATTACH_DECL_NEW(tqphy, sizeof(struct mii_softc),
85 tqphymatch, tqphyattach, mii_phy_detach, mii_phy_activate);
86
87static int tqphy_service(struct mii_softc *, struct mii_data *, int);
88static void tqphy_status(struct mii_softc *);
89
90static const struct mii_phy_funcs tqphy_funcs = {
91 tqphy_service, tqphy_status, mii_phy_reset,
92};
93
94static const struct mii_phydesc tqphys[] = {
95 { MII_OUI_xxTSC, MII_MODEL_xxTSC_78Q2120,
96 MII_STR_xxTSC_78Q2120 },
97#if 0
98 { MII_OUI_xxTSC, MII_MODEL_TSC_78Q2121,
99 MII_STR_TSC_78Q2121 },
100#endif
101 { 0, 0,
102 NULL },
103};
104
105static int
106tqphymatch(device_t parent, cfdata_t match, void *aux)
107{
108 struct mii_attach_args *ma = aux;
109
110 if (mii_phy_match(ma, tqphys) != NULL) {
111 /* The DIAG register is unreliable on early revisions. */
112 if (MII_MODEL(ma->mii_id2) == MII_MODEL_xxTSC_78Q2120 &&
113 MII_REV(ma->mii_id2) <= 3)
114 return (0);
115 return (10);
116 }
117
118 return (0);
119}
120
121static void
122tqphyattach(device_t parent, device_t self, void *aux)
123{
124 struct mii_softc *sc = device_private(self);
125 struct mii_attach_args *ma = aux;
126 struct mii_data *mii = ma->mii_data;
127 const struct mii_phydesc *mpd;
128
129 mpd = mii_phy_match(ma, tqphys);
130 aprint_naive(": Media interface\n");
131 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
132
133 sc->mii_dev = self;
134 sc->mii_inst = mii->mii_instance;
135 sc->mii_phy = ma->mii_phyno;
136 sc->mii_funcs = &tqphy_funcs;
137 sc->mii_pdata = mii;
138 sc->mii_flags = ma->mii_flags;
139 sc->mii_anegticks = MII_ANEGTICKS;
140
141 /*
142 * Apparently, we can't do loopback on this PHY.
143 */
144 sc->mii_flags |= MIIF_NOLOOP;
145
146 PHY_RESET(sc);
147
148 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
149 aprint_normal_dev(self, "");
150 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
151 aprint_error("no media present");
152 else
153 mii_phy_add_media(sc);
154 aprint_normal("\n");
155}
156
157static int
158tqphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
159{
160 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
161 int reg;
162
163 switch (cmd) {
164 case MII_POLLSTAT:
165 /*
166 * If we're not polling our PHY instance, just return.
167 */
168 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
169 return (0);
170 break;
171
172 case MII_MEDIACHG:
173 /*
174 * If the media indicates a different PHY instance,
175 * isolate ourselves.
176 */
177 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
178 reg = PHY_READ(sc, MII_BMCR);
179 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
180 return (0);
181 }
182
183 /*
184 * If the interface is not up, don't do anything.
185 */
186 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
187 break;
188
189 mii_phy_setmedia(sc);
190 break;
191
192 case MII_TICK:
193 /*
194 * If we're not currently selected, just return.
195 */
196 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
197 return (0);
198
199 if (mii_phy_tick(sc) == EJUSTRETURN)
200 return (0);
201 break;
202
203 case MII_DOWN:
204 mii_phy_down(sc);
205 return (0);
206 }
207
208 /* Update the media status. */
209 mii_phy_status(sc);
210
211 /* Callback if something changed. */
212 mii_phy_update(sc, cmd);
213 return (0);
214}
215
216static void
217tqphy_status(struct mii_softc *sc)
218{
219 struct mii_data *mii = sc->mii_pdata;
220 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
221 int bmsr, bmcr, diag;
222
223 mii->mii_media_status = IFM_AVALID;
224 mii->mii_media_active = IFM_ETHER;
225
226 bmsr = PHY_READ(sc, MII_BMSR) |
227 PHY_READ(sc, MII_BMSR);
228 if (bmsr & BMSR_LINK)
229 mii->mii_media_status |= IFM_ACTIVE;
230
231 bmcr = PHY_READ(sc, MII_BMCR);
232 if (bmcr & BMCR_ISO) {
233 mii->mii_media_active |= IFM_NONE;
234 mii->mii_media_status = 0;
235 return;
236 }
237
238 if (bmcr & BMCR_LOOP)
239 mii->mii_media_active |= IFM_LOOP;
240
241 if (bmcr & BMCR_AUTOEN) {
242 if ((bmsr & BMSR_ACOMP) == 0) {
243 /* Erg, still trying, I guess... */
244 mii->mii_media_active |= IFM_NONE;
245 return;
246 }
247 diag = PHY_READ(sc, MII_TQPHY_DIAG);
248 if (diag & DIAG_RATE)
249 mii->mii_media_active |= IFM_100_TX;
250 else
251 mii->mii_media_active |= IFM_10_T;
252
253 if (diag & DIAG_DPLX)
254 mii->mii_media_active |= IFM_FDX;
255 else
256 mii->mii_media_active |= IFM_HDX;
257 } else
258 mii->mii_media_active = ife->ifm_media;
259}
260