acphy.c revision 164834
1/*-
2 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to The NetBSD Foundation
6 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
7 * NASA Ames Research Center.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed by the NetBSD
20 *	Foundation, Inc. and its contributors.
21 * 4. Neither the name of The NetBSD Foundation nor the names of its
22 *    contributors may be used to endorse or promote products derived
23 *    from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
26 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38/*-
39 * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
40 *
41 * Redistribution and use in source and binary forms, with or without
42 * modification, are permitted provided that the following conditions
43 * are met:
44 * 1. Redistributions of source code must retain the above copyright
45 *    notice, this list of conditions and the following disclaimer.
46 * 2. Redistributions in binary form must reproduce the above copyright
47 *    notice, this list of conditions and the following disclaimer in the
48 *    documentation and/or other materials provided with the distribution.
49 * 3. All advertising materials mentioning features or use of this software
50 *    must display the following acknowledgement:
51 *	This product includes software developed by Manuel Bouyer.
52 * 4. The name of the author may not be used to endorse or promote products
53 *    derived from this software without specific prior written permission.
54 *
55 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
56 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
57 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
58 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
59 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
60 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
64 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
65 */
66
67#include <sys/cdefs.h>
68__FBSDID("$FreeBSD: head/sys/dev/mii/acphy.c 164834 2006-12-02 21:19:54Z marius $");
69
70/*
71 * Driver for Altima AC101 10/100 PHY
72 */
73
74#include <sys/param.h>
75#include <sys/systm.h>
76#include <sys/kernel.h>
77#include <sys/socket.h>
78#include <sys/errno.h>
79#include <sys/module.h>
80#include <sys/bus.h>
81
82#include <net/if.h>
83#include <net/if_media.h>
84
85#include <dev/mii/mii.h>
86#include <dev/mii/miivar.h>
87#include "miidevs.h"
88
89#include <dev/mii/acphyreg.h>
90
91#include "miibus_if.h"
92
93static int acphy_probe(device_t);
94static int acphy_attach(device_t);
95
96static device_method_t acphy_methods[] = {
97	/* device interface */
98	DEVMETHOD(device_probe,		acphy_probe),
99	DEVMETHOD(device_attach,	acphy_attach),
100	DEVMETHOD(device_detach,	mii_phy_detach),
101	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
102	{ 0, 0 }
103};
104
105static devclass_t acphy_devclass;
106
107static driver_t acphy_driver = {
108	"acphy",
109	acphy_methods,
110	sizeof(struct mii_softc)
111};
112
113DRIVER_MODULE(acphy, miibus, acphy_driver, acphy_devclass, 0, 0);
114
115static int	acphy_service(struct mii_softc *, struct mii_data *, int);
116static void	acphy_reset(struct mii_softc *);
117static void	acphy_status(struct mii_softc *);
118
119static const struct mii_phydesc acphys[] = {
120	MII_PHY_DESC(xxALTIMA, AC101),
121	MII_PHY_DESC(xxALTIMA, AC101L),
122	/* XXX This is reported to work, but it's not from any data sheet. */
123	MII_PHY_DESC(xxALTIMA, ACXXX),
124	MII_PHY_END
125};
126
127static int
128acphy_probe(device_t dev)
129{
130
131	return (mii_phy_dev_probe(dev, acphys, BUS_PROBE_DEFAULT));
132}
133
134static int
135acphy_attach(device_t dev)
136{
137	struct mii_softc *sc;
138	struct mii_attach_args *ma;
139	struct mii_data *mii;
140
141	sc = device_get_softc(dev);
142	ma = device_get_ivars(dev);
143	sc->mii_dev = device_get_parent(dev);
144	mii = device_get_softc(sc->mii_dev);
145	LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
146
147	sc->mii_inst = mii->mii_instance;
148	sc->mii_phy = ma->mii_phyno;
149	sc->mii_service = acphy_service;
150	sc->mii_pdata = mii;
151
152	mii->mii_instance++;
153
154	acphy_reset(sc);
155
156	sc->mii_capabilities =
157	    PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
158	device_printf(dev, " ");
159	mii_phy_add_media(sc);
160	printf("\n");
161
162	MIIBUS_MEDIAINIT(sc->mii_dev);
163	return (0);
164}
165
166static int
167acphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
168{
169	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
170	int reg;
171
172	/*
173	 * If we're not selected, then do nothing, just isolate and power
174	 * down, if changing media.
175	 */
176	if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
177		if (cmd == MII_MEDIACHG) {
178			reg = PHY_READ(sc, MII_BMCR);
179			PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO | BMCR_PDOWN);
180		}
181
182		return (0);
183	}
184
185	switch (cmd) {
186	case MII_POLLSTAT:
187		break;
188
189	case MII_MEDIACHG:
190		/*
191		 * If the interface is not up, don't do anything.
192		 */
193		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
194			break;
195
196		/* Wake & deisolate up if necessary */
197		reg = PHY_READ(sc, MII_BMCR);
198		if (reg & (BMCR_ISO | BMCR_PDOWN))
199			PHY_WRITE(sc, MII_BMCR, reg & ~(BMCR_ISO | BMCR_PDOWN));
200
201		mii_phy_setmedia(sc);
202		break;
203
204	case MII_TICK:
205		/*
206		 * Is the interface even up?
207		 */
208		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
209			return (0);
210
211		/*
212		 * This PHY's autonegotiation doesn't need to be kicked.
213		 */
214		break;
215	}
216
217	/* Update the media status. */
218	acphy_status(sc);
219
220	/* Callback if something changed. */
221	mii_phy_update(sc, cmd);
222	return (0);
223}
224
225static void
226acphy_status(struct mii_softc *sc)
227{
228	struct mii_data *mii = sc->mii_pdata;
229	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
230	int bmsr, bmcr, diag;
231
232	mii->mii_media_status = IFM_AVALID;
233	mii->mii_media_active = IFM_ETHER;
234
235	bmsr = PHY_READ(sc, MII_BMSR) |
236	    PHY_READ(sc, MII_BMSR);
237	if (bmsr & BMSR_LINK)
238		mii->mii_media_status |= IFM_ACTIVE;
239
240	bmcr = PHY_READ(sc, MII_BMCR);
241	if (bmcr & BMCR_ISO) {
242		mii->mii_media_active |= IFM_NONE;
243		mii->mii_media_status = 0;
244		return;
245	}
246
247	if (bmcr & BMCR_LOOP)
248		mii->mii_media_active |= IFM_LOOP;
249
250	if (bmcr & BMCR_AUTOEN) {
251		if ((bmsr & BMSR_ACOMP) == 0) {
252			/* Erg, still trying, I guess... */
253			mii->mii_media_active |= IFM_NONE;
254			return;
255		}
256		diag = PHY_READ(sc, MII_ACPHY_DIAG);
257		if (diag & AC_DIAG_SPEED)
258			mii->mii_media_active |= IFM_100_TX;
259		else
260			mii->mii_media_active |= IFM_10_T;
261
262		if (diag & AC_DIAG_DUPLEX)
263			mii->mii_media_active |= IFM_FDX;
264	} else
265		mii->mii_media_active = ife->ifm_media;
266}
267
268static void
269acphy_reset(struct mii_softc *sc)
270{
271
272	mii_phy_reset(sc);
273	PHY_WRITE(sc, MII_ACPHY_INT, 0);
274}
275