bmtphy.c revision 215720 
1/*-
2 * Copyright (c) 1998, 1999, 2000, 2001 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 *
18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31/*
32 * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
33 *
34 * Redistribution and use in source and binary forms, with or without
35 * modification, are permitted provided that the following conditions
36 * are met:
37 * 1. Redistributions of source code must retain the above copyright
38 *    notice, this list of conditions and the following disclaimer.
39 * 2. Redistributions in binary form must reproduce the above copyright
40 *    notice, this list of conditions and the following disclaimer in the
41 *    documentation and/or other materials provided with the distribution.
42 *
43 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
44 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
45 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
46 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
47 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
48 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
49 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
50 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
51 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
52 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
53 *
54 *	from: NetBSD: bmtphy.c,v 1.8 2002/07/03 06:25:50 simonb Exp
55 *
56 */
57
58#include <sys/cdefs.h>
59__FBSDID("$FreeBSD: head/sys/dev/mii/bmtphy.c 215720 2010-11-22 22:03:11Z marius $");
60
61/*
62 * Driver for the Broadcom BCM5201/BCM5202 "Mini-Theta" PHYs.  This also
63 * drives the PHY on the 3Com 3c905C.  The 3c905C's PHY is described in
64 * the 3c905C data sheet.
65 */
66
67#include <sys/param.h>
68#include <sys/systm.h>
69#include <sys/kernel.h>
70#include <sys/module.h>
71#include <sys/socket.h>
72#include <sys/bus.h>
73
74#include <net/if.h>
75#include <net/if_media.h>
76
77#include <dev/mii/mii.h>
78#include <dev/mii/miivar.h>
79#include "miidevs.h"
80
81#include <dev/mii/bmtphyreg.h>
82
83#include "miibus_if.h"
84
85static int	bmtphy_probe(device_t);
86static int	bmtphy_attach(device_t);
87
88struct bmtphy_softc {
89	struct mii_softc mii_sc;
90	int mii_model;
91};
92
93static device_method_t bmtphy_methods[] = {
94	/* Device interface */
95	DEVMETHOD(device_probe,		bmtphy_probe),
96	DEVMETHOD(device_attach,	bmtphy_attach),
97	DEVMETHOD(device_detach,	mii_phy_detach),
98	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
99
100	{ 0, 0 }
101};
102
103static devclass_t	bmtphy_devclass;
104
105static driver_t	bmtphy_driver = {
106	"bmtphy",
107	bmtphy_methods,
108	sizeof(struct bmtphy_softc)
109};
110
111DRIVER_MODULE(bmtphy, miibus, bmtphy_driver, bmtphy_devclass, 0, 0);
112
113static int	bmtphy_service(struct mii_softc *, struct mii_data *, int);
114static void	bmtphy_status(struct mii_softc *);
115static void	bmtphy_reset(struct mii_softc *);
116
117static const struct mii_phydesc bmtphys_dp[] = {
118	MII_PHY_DESC(BROADCOM, BCM4401),
119	MII_PHY_DESC(BROADCOM, BCM5201),
120	MII_PHY_DESC(BROADCOM, BCM5214),
121	MII_PHY_DESC(BROADCOM, BCM5221),
122	MII_PHY_DESC(BROADCOM, BCM5222),
123	MII_PHY_END
124};
125
126static const struct mii_phydesc bmtphys_lp[] = {
127	MII_PHY_DESC(BROADCOM, 3C905B),
128	MII_PHY_DESC(BROADCOM, 3C905C),
129	MII_PHY_END
130};
131
132static int
133bmtphy_probe(device_t dev)
134{
135	int	rval;
136
137	/* Let exphy(4) take precedence for these. */
138	rval = mii_phy_dev_probe(dev, bmtphys_lp, BUS_PROBE_LOW_PRIORITY);
139	if (rval <= 0)
140		return (rval);
141
142	return (mii_phy_dev_probe(dev, bmtphys_dp, BUS_PROBE_DEFAULT));
143}
144
145static int
146bmtphy_attach(device_t dev)
147{
148	struct bmtphy_softc *bsc;
149	struct mii_softc *sc;
150	struct mii_attach_args *ma;
151	struct mii_data *mii;
152
153	bsc = device_get_softc(dev);
154	sc = &bsc->mii_sc;
155	ma = device_get_ivars(dev);
156	sc->mii_dev = device_get_parent(dev);
157	mii = ma->mii_data;
158	LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
159
160	sc->mii_flags = miibus_get_flags(dev);
161	sc->mii_inst = mii->mii_instance++;
162	sc->mii_phy = ma->mii_phyno;
163	sc->mii_service = bmtphy_service;
164	sc->mii_pdata = mii;
165
166	sc->mii_flags |= MIIF_NOMANPAUSE;
167
168	bsc->mii_model = MII_MODEL(ma->mii_id2);
169
170	bmtphy_reset(sc);
171
172	sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
173	device_printf(dev, " ");
174	mii_phy_add_media(sc);
175	printf("\n");
176
177	MIIBUS_MEDIAINIT(sc->mii_dev);
178
179	return (0);
180}
181
182static int
183bmtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
184{
185
186	switch (cmd) {
187	case MII_POLLSTAT:
188		break;
189
190	case MII_MEDIACHG:
191		/*
192		 * If the interface is not up, don't do anything.
193		 */
194		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
195			break;
196
197		mii_phy_setmedia(sc);
198		break;
199
200	case MII_TICK:
201		if (mii_phy_tick(sc) == EJUSTRETURN)
202			return (0);
203		break;
204	}
205
206	/* Update the media status. */
207	bmtphy_status(sc);
208
209	/* Callback if something changed. */
210	mii_phy_update(sc, cmd);
211	return (0);
212}
213
214static void
215bmtphy_status(struct mii_softc *sc)
216{
217	struct mii_data *mii;
218	struct ifmedia_entry *ife;
219	int bmsr, bmcr, aux_csr;
220
221	mii = sc->mii_pdata;
222	ife = mii->mii_media.ifm_cur;
223
224	mii->mii_media_status = IFM_AVALID;
225	mii->mii_media_active = IFM_ETHER;
226
227	bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
228
229	if (bmsr & BMSR_LINK)
230		mii->mii_media_status |= IFM_ACTIVE;
231
232	bmcr = PHY_READ(sc, MII_BMCR);
233	if (bmcr & BMCR_ISO) {
234		mii->mii_media_active |= IFM_NONE;
235		mii->mii_media_status = 0;
236		return;
237	}
238
239	if (bmcr & BMCR_LOOP)
240		mii->mii_media_active |= IFM_LOOP;
241
242	if (bmcr & BMCR_AUTOEN) {
243		/*
244		 * The media status bits are only valid if autonegotiation
245		 * has completed (or it's disabled).
246		 */
247		if ((bmsr & BMSR_ACOMP) == 0) {
248			/* Erg, still trying, I guess... */
249			mii->mii_media_active |= IFM_NONE;
250			return;
251		}
252
253		aux_csr = PHY_READ(sc, MII_BMTPHY_AUX_CSR);
254		if (aux_csr & AUX_CSR_SPEED)
255			mii->mii_media_active |= IFM_100_TX;
256		else
257			mii->mii_media_active |= IFM_10_T;
258		if (aux_csr & AUX_CSR_FDX)
259			mii->mii_media_active |=
260			    IFM_FDX | mii_phy_flowstatus(sc);
261		else
262			mii->mii_media_active |= IFM_HDX;
263	} else
264		mii->mii_media_active = ife->ifm_media;
265}
266
267static void
268bmtphy_reset(struct mii_softc *sc)
269{
270	struct bmtphy_softc *bsc;
271	u_int16_t data;
272
273	bsc = (struct bmtphy_softc *)sc;
274
275	mii_phy_reset(sc);
276
277	if (bsc->mii_model == MII_MODEL_BROADCOM_BCM5221) {
278		/* Enable shadow register mode. */
279		data = PHY_READ(sc, 0x1f);
280		PHY_WRITE(sc, 0x1f, data | 0x0080);
281
282		/* Enable APD (Auto PowerDetect). */
283		data = PHY_READ(sc, MII_BMTPHY_AUX2);
284		PHY_WRITE(sc, MII_BMTPHY_AUX2, data | 0x0020);
285
286		/* Enable clocks across APD for Auto-MDIX functionality. */
287		data = PHY_READ(sc, MII_BMTPHY_INTR);
288		PHY_WRITE(sc, MII_BMTPHY_INTR, data | 0x0004);
289
290		/* Disable shadow register mode. */
291		data = PHY_READ(sc, 0x1f);
292		PHY_WRITE(sc, 0x1f, data & ~0x0080);
293	}
294}
295