1 /* $NetBSD: icsphy.c,v 1.41 2006/11/16 21:24:07 christos 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 #include <sys/cdefs.h>
58 __FBSDID("$FreeBSD$");
59
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 devclass_t icsphy_devclass;
96
97 static driver_t icsphy_driver = {
98 "icsphy",
99 icsphy_methods,
100 sizeof(struct mii_softc)
101 };
102
103 DRIVER_MODULE(icsphy, miibus, icsphy_driver, icsphy_devclass, 0, 0);
104
105 static int icsphy_service(struct mii_softc *, struct mii_data *, int);
106 static void icsphy_status(struct mii_softc *);
107 static void icsphy_reset(struct mii_softc *);
108
109 static const struct mii_phydesc icsphys[] = {
110 MII_PHY_DESC(ICS, 1889),
111 MII_PHY_DESC(ICS, 1890),
112 MII_PHY_DESC(ICS, 1892),
113 MII_PHY_DESC(ICS, 1893),
114 MII_PHY_END
115 };
116
117 static const struct mii_phy_funcs icsphy_funcs = {
118 icsphy_service,
119 icsphy_status,
120 icsphy_reset
121 };
122
123 static int
icsphy_probe(device_t dev)124 icsphy_probe(device_t dev)
125 {
126
127 return (mii_phy_dev_probe(dev, icsphys, BUS_PROBE_DEFAULT));
128 }
129
130 static int
icsphy_attach(device_t dev)131 icsphy_attach(device_t dev)
132 {
133
134 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
135 &icsphy_funcs, 1);
136 return (0);
137 }
138
139 static int
icsphy_service(struct mii_softc * sc,struct mii_data * mii,int cmd)140 icsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
141 {
142
143 switch (cmd) {
144 case MII_POLLSTAT:
145 break;
146
147 case MII_MEDIACHG:
148 mii_phy_setmedia(sc);
149 break;
150
151 case MII_TICK:
152 if (mii_phy_tick(sc) == EJUSTRETURN)
153 return (0);
154 break;
155 }
156
157 /* Update the media status. */
158 PHY_STATUS(sc);
159
160 /* Callback if something changed. */
161 mii_phy_update(sc, cmd);
162 return (0);
163 }
164
165 static void
icsphy_status(struct mii_softc * sc)166 icsphy_status(struct mii_softc *sc)
167 {
168 struct mii_data *mii = sc->mii_pdata;
169 struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
170 int bmcr, qpr;
171
172 mii->mii_media_status = IFM_AVALID;
173 mii->mii_media_active = IFM_ETHER;
174
175 /*
176 * Don't get link from the BMSR. It's available in the QPR,
177 * and we have to read it twice to unlatch it anyhow. This
178 * gives us fewer register reads.
179 */
180 qpr = PHY_READ(sc, MII_ICSPHY_QPR); /* unlatch */
181 qpr = PHY_READ(sc, MII_ICSPHY_QPR); /* real value */
182
183 if (qpr & QPR_LINK)
184 mii->mii_media_status |= IFM_ACTIVE;
185
186 bmcr = PHY_READ(sc, MII_BMCR);
187 if (bmcr & BMCR_ISO) {
188 mii->mii_media_active |= IFM_NONE;
189 mii->mii_media_status = 0;
190 return;
191 }
192
193 if (bmcr & BMCR_LOOP)
194 mii->mii_media_active |= IFM_LOOP;
195
196 if (bmcr & BMCR_AUTOEN) {
197 if ((qpr & QPR_ACOMP) == 0) {
198 /* Erg, still trying, I guess... */
199 mii->mii_media_active |= IFM_NONE;
200 return;
201 }
202 if (qpr & QPR_SPEED)
203 mii->mii_media_active |= IFM_100_TX;
204 else
205 mii->mii_media_active |= IFM_10_T;
206 if (qpr & QPR_FDX)
207 mii->mii_media_active |=
208 IFM_FDX | mii_phy_flowstatus(sc);
209 else
210 mii->mii_media_active |= IFM_HDX;
211 } else
212 mii->mii_media_active = ife->ifm_media;
213 }
214
215 static void
icsphy_reset(struct mii_softc * sc)216 icsphy_reset(struct mii_softc *sc)
217 {
218
219 mii_phy_reset(sc);
220 /* set powerdown feature */
221 switch (sc->mii_mpd_model) {
222 case MII_MODEL_ICS_1890:
223 case MII_MODEL_ICS_1893:
224 PHY_WRITE(sc, MII_ICSPHY_ECR2, ECR2_100AUTOPWRDN);
225 break;
226 case MII_MODEL_ICS_1892:
227 PHY_WRITE(sc, MII_ICSPHY_ECR2,
228 ECR2_10AUTOPWRDN|ECR2_100AUTOPWRDN);
229 break;
230 default:
231 /* 1889 have no ECR2 */
232 break;
233 }
234 /*
235 * There is no description that the reset do auto-negotiation in the
236 * data sheet.
237 */
238 PHY_WRITE(sc, MII_BMCR, BMCR_S100|BMCR_STARTNEG|BMCR_FDX);
239 }
240