pnaphy.c revision 84145 
1/*
2 * Copyright (c) 2000 Berkeley Software Design, Inc.
3 * Copyright (c) 1997, 1998, 1999, 2000
4 *	Bill Paul <wpaul@osd.bsdi.com>.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *	This product includes software developed by Bill Paul.
17 * 4. Neither the name of the author nor the names of any co-contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
31 * THE POSSIBILITY OF SUCH DAMAGE.
32 *
33 * $FreeBSD: head/sys/dev/mii/pnaphy.c 84145 2001-09-29 19:18:52Z jlemon $
34 */
35
36/*
37 * driver for homePNA PHYs
38 * This is really just a stub that allows us to identify homePNA-based
39 * transceicers and display the link status. MII-based homePNA PHYs
40 * only support one media type and no autonegotiation. If we were
41 * really clever, we could tweak some of the vendor-specific registers
42 * to optimize the link.
43 */
44
45#include <sys/param.h>
46#include <sys/systm.h>
47#include <sys/kernel.h>
48#include <sys/malloc.h>
49#include <sys/socket.h>
50#include <sys/errno.h>
51#include <sys/module.h>
52#include <sys/bus.h>
53
54#include <net/if.h>
55#include <net/if_media.h>
56
57
58#include <dev/mii/mii.h>
59#include <dev/mii/miivar.h>
60#include <dev/mii/miidevs.h>
61
62#include "miibus_if.h"
63
64#if !defined(lint)
65static const char rcsid[] =
66  "$FreeBSD: head/sys/dev/mii/pnaphy.c 84145 2001-09-29 19:18:52Z jlemon $";
67#endif
68
69static int pnaphy_probe		__P((device_t));
70static int pnaphy_attach	__P((device_t));
71static int pnaphy_detach	__P((device_t));
72
73static device_method_t pnaphy_methods[] = {
74	/* device interface */
75	DEVMETHOD(device_probe,		pnaphy_probe),
76	DEVMETHOD(device_attach,	pnaphy_attach),
77	DEVMETHOD(device_detach,	pnaphy_detach),
78	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
79	{ 0, 0 }
80};
81
82static devclass_t pnaphy_devclass;
83
84static driver_t pnaphy_driver = {
85	"pnaphy",
86	pnaphy_methods,
87	sizeof(struct mii_softc)
88};
89
90DRIVER_MODULE(pnaphy, miibus, pnaphy_driver, pnaphy_devclass, 0, 0);
91
92static int	pnaphy_service __P((struct mii_softc *, struct mii_data *,int));
93
94static int
95pnaphy_probe(dev)
96	device_t		dev;
97{
98
99	struct mii_attach_args	*ma;
100
101	ma = device_get_ivars(dev);
102
103	if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_AMD &&
104	    MII_MODEL(ma->mii_id2) == MII_MODEL_AMD_79c978) {
105		device_set_desc(dev, MII_STR_AMD_79c978);
106		return(0);
107	}
108
109	return(ENXIO);
110}
111
112static int
113pnaphy_attach(dev)
114	device_t		dev;
115{
116	struct mii_softc *sc;
117	struct mii_attach_args *ma;
118	struct mii_data *mii;
119	const char *sep = "";
120
121	sc = device_get_softc(dev);
122	ma = device_get_ivars(dev);
123	sc->mii_dev = device_get_parent(dev);
124	mii = device_get_softc(sc->mii_dev);
125	LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
126
127	sc->mii_inst = mii->mii_instance;
128	sc->mii_phy = ma->mii_phyno;
129	sc->mii_service = pnaphy_service;
130	sc->mii_pdata = mii;
131
132	mii->mii_instance++;
133
134	sc->mii_flags |= MIIF_NOISOLATE;
135
136#define	ADD(m, c)	ifmedia_add(&mii->mii_media, (m), (c), NULL)
137#define PRINT(s)	printf("%s%s", sep, s); sep = ", "
138
139	mii_phy_reset(sc);
140
141	sc->mii_capabilities =
142	    PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
143	device_printf(dev, " ");
144	if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
145		printf("no media present");
146	else {
147		ADD(IFM_MAKEWORD(IFM_ETHER, IFM_homePNA, 0, sc->mii_inst), 0);
148		PRINT("HomePNA");
149	}
150	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
151	    BMCR_ISO);
152
153	printf("\n");
154
155#undef ADD
156#undef PRINT
157
158	MIIBUS_MEDIAINIT(sc->mii_dev);
159
160	return(0);
161}
162
163static int pnaphy_detach(dev)
164	device_t		dev;
165{
166	struct mii_softc *sc;
167	struct mii_data *mii;
168
169	sc = device_get_softc(dev);
170	mii = device_get_softc(device_get_parent(dev));
171	mii_phy_auto_stop(sc);
172	sc->mii_dev = NULL;
173	LIST_REMOVE(sc, mii_list);
174
175	return(0);
176}
177
178int
179pnaphy_service(sc, mii, cmd)
180	struct mii_softc *sc;
181	struct mii_data *mii;
182	int cmd;
183{
184	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
185	int reg;
186
187	switch (cmd) {
188	case MII_POLLSTAT:
189		/*
190		 * If we're not polling our PHY instance, just return.
191		 */
192		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
193			return (0);
194		break;
195
196	case MII_MEDIACHG:
197		/*
198		 * If the media indicates a different PHY instance,
199		 * isolate ourselves.
200		 */
201		if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
202			reg = PHY_READ(sc, MII_BMCR);
203			PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
204			return (0);
205		}
206
207		/*
208		 * If the interface is not up, don't do anything.
209		 */
210		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
211			break;
212
213		switch (IFM_SUBTYPE(ife->ifm_media)) {
214		case IFM_AUTO:
215		case IFM_10_T:
216		case IFM_100_TX:
217		case IFM_100_T4:
218			return (EINVAL);
219		default:
220			/*
221			 * BMCR data is stored in the ifmedia entry.
222			 */
223			PHY_WRITE(sc, MII_ANAR,
224			    mii_anar(ife->ifm_media));
225			PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
226		}
227		break;
228
229	case MII_TICK:
230		/*
231		 * If we're not currently selected, just return.
232		 */
233		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
234			return (0);
235		if (mii_phy_tick(sc) == EJUSTRETURN)
236			return (0);
237		break;
238	}
239
240	/* Update the media status. */
241	ukphy_status(sc);
242	if (IFM_SUBTYPE(mii->mii_media_active) == IFM_10_T)
243		mii->mii_media_active = IFM_ETHER|IFM_homePNA;
244
245	/* Callback if something changed. */
246	mii_phy_update(sc, cmd);
247	return (0);
248}
249