1/* $NetBSD: lxtphy.c,v 1.50 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 * driver for Level One's LXT-970 ethernet 10/100 PHY
59 * datasheet from www.level1.com
60 */
61
62#include <sys/cdefs.h>
63__KERNEL_RCSID(0, "$NetBSD: lxtphy.c,v 1.50 2016/07/07 06:55:41 msaitoh Exp $");
64
65#include <sys/param.h>
66#include <sys/systm.h>
67#include <sys/kernel.h>
68#include <sys/device.h>
69#include <sys/socket.h>
70#include <sys/errno.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/lxtphyreg.h>
80
81static int lxtphymatch(device_t, cfdata_t, void *);
82static void lxtphyattach(device_t, device_t, void *);
83
84CFATTACH_DECL_NEW(lxtphy, sizeof(struct mii_softc),
85 lxtphymatch, lxtphyattach, mii_phy_detach, mii_phy_activate);
86
87static int lxtphy_service(struct mii_softc *, struct mii_data *, int);
88static void lxtphy_status(struct mii_softc *);
89static void lxtphy_reset(struct mii_softc *);
90
91static void lxtphy_set_tp(struct mii_softc *);
92static void lxtphy_set_fx(struct mii_softc *);
93
94static const struct mii_phy_funcs lxtphy_funcs = {
95 lxtphy_service, lxtphy_status, lxtphy_reset,
96};
97
98static const struct mii_phy_funcs lxtphy971_funcs = {
99 lxtphy_service, ukphy_status, lxtphy_reset,
100};
101
102static const struct mii_phydesc lxtphys[] = {
103 { MII_OUI_xxLEVEL1, MII_MODEL_xxLEVEL1_LXT970,
104 MII_STR_xxLEVEL1_LXT970 },
105
106 { MII_OUI_LEVEL1, MII_MODEL_LEVEL1_LXT971,
107 MII_STR_LEVEL1_LXT971 },
108
109 { 0, 0,
110 NULL },
111};
112
113static int
114lxtphymatch(device_t parent, cfdata_t match, void *aux)
115{
116 struct mii_attach_args *ma = aux;
117
118 if (mii_phy_match(ma, lxtphys) != NULL)
119 return (10);
120
121 return (0);
122}
123
124static void
125lxtphyattach(device_t parent, device_t self, void *aux)
126{
127 struct mii_softc *sc = device_private(self);
128 struct mii_attach_args *ma = aux;
129 struct mii_data *mii = ma->mii_data;
130 const struct mii_phydesc *mpd;
131
132 mpd = mii_phy_match(ma, lxtphys);
133 aprint_naive(": Media interface\n");
134 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
135
136 sc->mii_dev = self;
137 sc->mii_inst = mii->mii_instance;
138 sc->mii_phy = ma->mii_phyno;
139 if (mpd->mpd_model == MII_MODEL_LEVEL1_LXT971)
140 sc->mii_funcs = &lxtphy971_funcs;
141 else
142 sc->mii_funcs = &lxtphy_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
152 if (sc->mii_flags & MIIF_HAVEFIBER) {
153#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
154 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, 0, sc->mii_inst),
155 MII_MEDIA_100_TX);
156 aprint_normal("100baseFX, ");
157 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, IFM_FDX, sc->mii_inst),
158 MII_MEDIA_100_TX_FDX);
159 aprint_normal("100baseFX-FDX, ");
160#undef ADD
161 }
162
163 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
164 aprint_error("no media present");
165 else
166 mii_phy_add_media(sc);
167 aprint_normal("\n");
168}
169
170static int
171lxtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
172{
173 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
174 int reg;
175
176 switch (cmd) {
177 case MII_POLLSTAT:
178 /*
179 * If we're not polling our PHY instance, just return.
180 */
181 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
182 return (0);
183 break;
184
185 case MII_MEDIACHG:
186 /*
187 * If the media indicates a different PHY instance,
188 * isolate ourselves.
189 */
190 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
191 reg = PHY_READ(sc, MII_BMCR);
192 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
193 return (0);
194 }
195
196 /*
197 * If the interface is not up, don't do anything.
198 */
199 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
200 break;
201
202 if (IFM_SUBTYPE(ife->ifm_media) == IFM_100_FX)
203 lxtphy_set_fx(sc);
204 else
205 lxtphy_set_tp(sc);
206
207 mii_phy_setmedia(sc);
208 break;
209
210 case MII_TICK:
211 /*
212 * If we're not currently selected, just return.
213 */
214 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
215 return (0);
216
217 if (mii_phy_tick(sc) == EJUSTRETURN)
218 return (0);
219 break;
220
221 case MII_DOWN:
222 mii_phy_down(sc);
223 return (0);
224 }
225
226 /* Update the media status. */
227 mii_phy_status(sc);
228
229 /* Callback if something changed. */
230 mii_phy_update(sc, cmd);
231 return (0);
232}
233
234static void
235lxtphy_status(struct mii_softc *sc)
236{
237 struct mii_data *mii = sc->mii_pdata;
238 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
239 int bmcr, bmsr, csr;
240
241 mii->mii_media_status = IFM_AVALID;
242 mii->mii_media_active = IFM_ETHER;
243
244 /*
245 * Get link status from the CSR; we need to read the CSR
246 * for media type anyhow, and the link status in the CSR
247 * doens't latch, so fewer register reads are required.
248 */
249 csr = PHY_READ(sc, MII_LXTPHY_CSR);
250 if (csr & CSR_LINK)
251 mii->mii_media_status |= IFM_ACTIVE;
252
253 bmcr = PHY_READ(sc, MII_BMCR);
254 if (bmcr & BMCR_ISO) {
255 mii->mii_media_active |= IFM_NONE;
256 mii->mii_media_status = 0;
257 return;
258 }
259
260 if (bmcr & BMCR_LOOP)
261 mii->mii_media_active |= IFM_LOOP;
262
263 if (bmcr & BMCR_AUTOEN) {
264 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
265 if ((bmsr & BMSR_ACOMP) == 0) {
266 /* Erg, still trying, I guess... */
267 mii->mii_media_active |= IFM_NONE;
268 return;
269 }
270 if (csr & CSR_SPEED)
271 mii->mii_media_active |= IFM_100_TX;
272 else
273 mii->mii_media_active |= IFM_10_T;
274
275 if (csr & CSR_DUPLEX)
276 mii->mii_media_active |= IFM_FDX;
277 else
278 mii->mii_media_active |= IFM_HDX;
279 } else
280 mii->mii_media_active = ife->ifm_media;
281}
282
283static void
284lxtphy_reset(struct mii_softc *sc)
285{
286
287 mii_phy_reset(sc);
288 PHY_WRITE(sc, MII_LXTPHY_IER,
289 PHY_READ(sc, MII_LXTPHY_IER) & ~IER_INTEN);
290}
291
292static void
293lxtphy_set_tp(struct mii_softc *sc)
294{
295 int cfg;
296
297 cfg = PHY_READ(sc, MII_LXTPHY_CONFIG);
298 cfg &= ~CONFIG_100BASEFX;
299 PHY_WRITE(sc, MII_LXTPHY_CONFIG, cfg);
300}
301
302static void
303lxtphy_set_fx(struct mii_softc *sc)
304{
305 int cfg;
306
307 cfg = PHY_READ(sc, MII_LXTPHY_CONFIG);
308 cfg |= CONFIG_100BASEFX;
309 PHY_WRITE(sc, MII_LXTPHY_CONFIG, cfg);
310}
311