1 /* $NetBSD: icsphy.c,v 1.41 2006/11/16 21:24:07 christos Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-2-Clause
5 *
6 * Copyright (c) 1998, 1999, 2000 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 #include <sys/cdefs.h>
60 /*
61 * driver for Integrated Circuit Systems' ICS1889-1893 ethernet 10/100 PHY
62 * datasheet from www.icst.com
63 */
64
65 #include <sys/param.h>
66 #include <sys/systm.h>
67 #include <sys/kernel.h>
68 #include <sys/module.h>
69 #include <sys/socket.h>
70 #include <sys/bus.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 "miidevs.h"
78
79 #include <dev/mii/icsphyreg.h>
80
81 #include "miibus_if.h"
82
83 static int icsphy_probe(device_t dev);
84 static int icsphy_attach(device_t dev);
85
86 static device_method_t icsphy_methods[] = {
87 /* device interface */
88 DEVMETHOD(device_probe, icsphy_probe),
89 DEVMETHOD(device_attach, icsphy_attach),
90 DEVMETHOD(device_detach, mii_phy_detach),
91 DEVMETHOD(device_shutdown, bus_generic_shutdown),
92 DEVMETHOD_END
93 };
94
95 static driver_t icsphy_driver = {
96 "icsphy",
97 icsphy_methods,
98 sizeof(struct mii_softc)
99 };
100
101 DRIVER_MODULE(icsphy, miibus, icsphy_driver, 0, 0);
102
103 static int icsphy_service(struct mii_softc *, struct mii_data *, int);
104 static void icsphy_status(struct mii_softc *);
105 static void icsphy_reset(struct mii_softc *);
106
107 static const struct mii_phydesc icsphys[] = {
108 MII_PHY_DESC(ICS, 1889),
109 MII_PHY_DESC(ICS, 1890),
110 MII_PHY_DESC(ICS, 1892),
111 MII_PHY_DESC(ICS, 1893),
112 MII_PHY_DESC(ICS, 1893C),
113 MII_PHY_END
114 };
115
116 static const struct mii_phy_funcs icsphy_funcs = {
117 icsphy_service,
118 icsphy_status,
119 icsphy_reset
120 };
121
122 static int
icsphy_probe(device_t dev)123 icsphy_probe(device_t dev)
124 {
125
126 return (mii_phy_dev_probe(dev, icsphys, BUS_PROBE_DEFAULT));
127 }
128
129 static int
icsphy_attach(device_t dev)130 icsphy_attach(device_t dev)
131 {
132
133 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
134 &icsphy_funcs, 1);
135 return (0);
136 }
137
138 static int
icsphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)139 icsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
140 {
141
142 switch (cmd) {
143 case MII_POLLSTAT:
144 break;
145
146 case MII_MEDIACHG:
147 mii_phy_setmedia(sc);
148 break;
149
150 case MII_TICK:
151 if (mii_phy_tick(sc) == EJUSTRETURN)
152 return (0);
153 break;
154 }
155
156 /* Update the media status. */
157 PHY_STATUS(sc);
158
159 /* Callback if something changed. */
160 mii_phy_update(sc, cmd);
161 return (0);
162 }
163
164 static void
icsphy_status(struct mii_softc * sc)165 icsphy_status(struct mii_softc *sc)
166 {
167 struct mii_data *mii = sc->mii_pdata;
168 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
169 int bmcr, qpr;
170
171 mii->mii_media_status = IFM_AVALID;
172 mii->mii_media_active = IFM_ETHER;
173
174 /*
175 * Don't get link from the BMSR. It's available in the QPR,
176 * and we have to read it twice to unlatch it anyhow. This
177 * gives us fewer register reads.
178 */
179 qpr = PHY_READ(sc, MII_ICSPHY_QPR); /* unlatch */
180 qpr = PHY_READ(sc, MII_ICSPHY_QPR); /* real value */
181
182 if (qpr & QPR_LINK)
183 mii->mii_media_status |= IFM_ACTIVE;
184
185 bmcr = PHY_READ(sc, MII_BMCR);
186 if (bmcr & BMCR_ISO) {
187 mii->mii_media_active |= IFM_NONE;
188 mii->mii_media_status = 0;
189 return;
190 }
191
192 if (bmcr & BMCR_LOOP)
193 mii->mii_media_active |= IFM_LOOP;
194
195 if (bmcr & BMCR_AUTOEN) {
196 if ((qpr & QPR_ACOMP) == 0) {
197 /* Erg, still trying, I guess... */
198 mii->mii_media_active |= IFM_NONE;
199 return;
200 }
201 if (qpr & QPR_SPEED)
202 mii->mii_media_active |= IFM_100_TX;
203 else
204 mii->mii_media_active |= IFM_10_T;
205 if (qpr & QPR_FDX)
206 mii->mii_media_active |=
207 IFM_FDX | mii_phy_flowstatus(sc);
208 else
209 mii->mii_media_active |= IFM_HDX;
210 } else
211 mii->mii_media_active = ife->ifm_media;
212 }
213
214 static void
icsphy_reset(struct mii_softc * sc)215 icsphy_reset(struct mii_softc *sc)
216 {
217
218 mii_phy_reset(sc);
219 /* set powerdown feature */
220 switch (sc->mii_mpd_model) {
221 case MII_MODEL_ICS_1890:
222 case MII_MODEL_ICS_1893:
223 PHY_WRITE(sc, MII_ICSPHY_ECR2, ECR2_100AUTOPWRDN);
224 break;
225 case MII_MODEL_ICS_1892:
226 PHY_WRITE(sc, MII_ICSPHY_ECR2,
227 ECR2_10AUTOPWRDN|ECR2_100AUTOPWRDN);
228 break;
229 default:
230 /* 1889 have no ECR2 */
231 break;
232 }
233 /*
234 * There is no description that the reset do auto-negotiation in the
235 * data sheet.
236 */
237 PHY_WRITE(sc, MII_BMCR, BMCR_S100|BMCR_STARTNEG|BMCR_FDX);
238 }
239