pnaphy.c revision 164827 
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
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD: head/sys/dev/mii/pnaphy.c 164827 2006-12-02 15:32:34Z marius $");
36
37/*
38 * driver for homePNA PHYs
39 * This is really just a stub that allows us to identify homePNA-based
40 * transceicers and display the link status. MII-based homePNA PHYs
41 * only support one media type and no autonegotiation. If we were
42 * really clever, we could tweak some of the vendor-specific registers
43 * to optimize the link.
44 */
45
46#include <sys/param.h>
47#include <sys/systm.h>
48#include <sys/kernel.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#include <dev/mii/mii.h>
58#include <dev/mii/miivar.h>
59#include "miidevs.h"
60
61#include "miibus_if.h"
62
63static int pnaphy_probe(device_t);
64static int pnaphy_attach(device_t);
65
66static device_method_t pnaphy_methods[] = {
67	/* device interface */
68	DEVMETHOD(device_probe,		pnaphy_probe),
69	DEVMETHOD(device_attach,	pnaphy_attach),
70	DEVMETHOD(device_detach,	mii_phy_detach),
71	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
72	{ 0, 0 }
73};
74
75static devclass_t pnaphy_devclass;
76
77static driver_t pnaphy_driver = {
78	"pnaphy",
79	pnaphy_methods,
80	sizeof(struct mii_softc)
81};
82
83DRIVER_MODULE(pnaphy, miibus, pnaphy_driver, pnaphy_devclass, 0, 0);
84
85static int	pnaphy_service(struct mii_softc *, struct mii_data *,int);
86
87static const struct mii_phydesc pnaphys[] = {
88	MII_PHY_DESC(AMD, 79c978),
89	MII_PHY_END
90};
91
92static int
93pnaphy_probe(device_t dev)
94{
95
96	return (mii_phy_dev_probe(dev, pnaphys, BUS_PROBE_DEFAULT));
97}
98
99static int
100pnaphy_attach(device_t dev)
101{
102	struct mii_softc *sc;
103	struct mii_attach_args *ma;
104	struct mii_data *mii;
105	const char *sep = "";
106
107	sc = device_get_softc(dev);
108	ma = device_get_ivars(dev);
109	sc->mii_dev = device_get_parent(dev);
110	mii = device_get_softc(sc->mii_dev);
111	LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
112
113	sc->mii_inst = mii->mii_instance;
114	sc->mii_phy = ma->mii_phyno;
115	sc->mii_service = pnaphy_service;
116	sc->mii_pdata = mii;
117
118	mii->mii_instance++;
119
120	sc->mii_flags |= MIIF_NOISOLATE;
121
122#define	ADD(m, c)	ifmedia_add(&mii->mii_media, (m), (c), NULL)
123#define PRINT(s)	printf("%s%s", sep, s); sep = ", "
124
125	mii_phy_reset(sc);
126
127	sc->mii_capabilities =
128	    PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
129	device_printf(dev, " ");
130	if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
131		printf("no media present");
132	else {
133		ADD(IFM_MAKEWORD(IFM_ETHER, IFM_HPNA_1, 0, sc->mii_inst), 0);
134		PRINT("HomePNA");
135	}
136	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
137	    BMCR_ISO);
138
139	printf("\n");
140
141#undef ADD
142#undef PRINT
143
144	MIIBUS_MEDIAINIT(sc->mii_dev);
145
146	return (0);
147}
148
149static int
150pnaphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
151{
152	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
153	int reg;
154
155	switch (cmd) {
156	case MII_POLLSTAT:
157		/*
158		 * If we're not polling our PHY instance, just return.
159		 */
160		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
161			return (0);
162		break;
163
164	case MII_MEDIACHG:
165		/*
166		 * If the media indicates a different PHY instance,
167		 * isolate ourselves.
168		 */
169		if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
170			reg = PHY_READ(sc, MII_BMCR);
171			PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
172			return (0);
173		}
174
175		/*
176		 * If the interface is not up, don't do anything.
177		 */
178		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
179			break;
180
181		switch (IFM_SUBTYPE(ife->ifm_media)) {
182		case IFM_AUTO:
183		case IFM_10_T:
184		case IFM_100_TX:
185		case IFM_100_T4:
186			return (EINVAL);
187		default:
188			/*
189			 * BMCR data is stored in the ifmedia entry.
190			 */
191			PHY_WRITE(sc, MII_ANAR,
192			    mii_anar(ife->ifm_media));
193			PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
194		}
195		break;
196
197	case MII_TICK:
198		/*
199		 * If we're not currently selected, just return.
200		 */
201		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
202			return (0);
203		if (mii_phy_tick(sc) == EJUSTRETURN)
204			return (0);
205		break;
206	}
207
208	/* Update the media status. */
209	ukphy_status(sc);
210	if (IFM_SUBTYPE(mii->mii_media_active) == IFM_10_T)
211		mii->mii_media_active = IFM_ETHER|IFM_HPNA_1;
212
213	/* Callback if something changed. */
214	mii_phy_update(sc, cmd);
215	return (0);
216}
217