amphy.c revision 105135 
1/*
2 * Copyright (c) 1997, 1998, 1999
3 *	Bill Paul <wpaul@ee.columbia.edu>.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by Bill Paul.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
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
30 * THE POSSIBILITY OF SUCH DAMAGE.
31 *
32 * $FreeBSD: head/sys/dev/mii/amphy.c 105135 2002-10-14 22:31:52Z alfred $
33 */
34
35/*
36 * driver for AMD AM79c873 PHYs
37 * This driver also works for the Davicom DM9101 PHY, which appears to
38 * be an AM79c873 workalike.
39 */
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/kernel.h>
44#include <sys/socket.h>
45#include <sys/bus.h>
46
47#include <net/if.h>
48#include <net/if_media.h>
49
50#include <dev/mii/mii.h>
51#include <dev/mii/miivar.h>
52#include <dev/mii/miidevs.h>
53
54#include <dev/mii/amphyreg.h>
55
56#include "miibus_if.h"
57
58#if !defined(lint)
59static const char rcsid[] =
60  "$FreeBSD: head/sys/dev/mii/amphy.c 105135 2002-10-14 22:31:52Z alfred $";
61#endif
62
63static int amphy_probe(device_t);
64static int amphy_attach(device_t);
65
66static device_method_t amphy_methods[] = {
67	/* device interface */
68	DEVMETHOD(device_probe,		amphy_probe),
69	DEVMETHOD(device_attach,	amphy_attach),
70	DEVMETHOD(device_detach,	mii_phy_detach),
71	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
72	{ 0, 0 }
73};
74
75static devclass_t amphy_devclass;
76
77static driver_t amphy_driver = {
78	"amphy",
79	amphy_methods,
80	sizeof(struct mii_softc)
81};
82
83DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, 0, 0);
84
85static int	amphy_service(struct mii_softc *, struct mii_data *, int);
86static void	amphy_status(struct mii_softc *);
87
88static int
89amphy_probe(dev)
90	device_t		dev;
91{
92	struct mii_attach_args *ma;
93
94	ma = device_get_ivars(dev);
95
96	if ((MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxAMD ||
97	    MII_MODEL(ma->mii_id2) != MII_MODEL_xxAMD_79C873) &&
98	    (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxDAVICOM ||
99	    MII_MODEL(ma->mii_id2) != MII_MODEL_xxDAVICOM_DM9101))
100		return(ENXIO);
101
102	if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxAMD)
103		device_set_desc(dev, MII_STR_xxAMD_79C873);
104	else if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxDAVICOM)
105		device_set_desc(dev, MII_STR_xxDAVICOM_DM9101);
106
107	return(0);
108}
109
110static int
111amphy_attach(dev)
112	device_t		dev;
113{
114	struct mii_softc *sc;
115	struct mii_attach_args *ma;
116	struct mii_data *mii;
117
118	sc = device_get_softc(dev);
119	ma = device_get_ivars(dev);
120	sc->mii_dev = device_get_parent(dev);
121	mii = device_get_softc(sc->mii_dev);
122	LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
123
124	sc->mii_inst = mii->mii_instance;
125	sc->mii_phy = ma->mii_phyno;
126	sc->mii_service = amphy_service;
127	sc->mii_pdata = mii;
128
129	sc->mii_flags |= MIIF_NOISOLATE;
130	mii->mii_instance++;
131
132#define	ADD(m, c)	ifmedia_add(&mii->mii_media, (m), (c), NULL)
133
134	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
135	    BMCR_ISO);
136#if 0
137	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
138	    BMCR_LOOP|BMCR_S100);
139#endif
140
141	mii_phy_reset(sc);
142
143	sc->mii_capabilities =
144	    PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
145	device_printf(dev, " ");
146	mii_add_media(sc);
147	printf("\n");
148#undef ADD
149	MIIBUS_MEDIAINIT(sc->mii_dev);
150	return(0);
151}
152
153static int
154amphy_service(sc, mii, cmd)
155	struct mii_softc *sc;
156	struct mii_data *mii;
157	int cmd;
158{
159	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
160	int reg;
161
162	switch (cmd) {
163	case MII_POLLSTAT:
164		/*
165		 * If we're not polling our PHY instance, just return.
166		 */
167		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
168			return (0);
169		break;
170
171	case MII_MEDIACHG:
172		/*
173		 * If the media indicates a different PHY instance,
174		 * isolate ourselves.
175		 */
176		if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
177			reg = PHY_READ(sc, MII_BMCR);
178			PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
179			return (0);
180		}
181
182		/*
183		 * If the interface is not up, don't do anything.
184		 */
185		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
186			break;
187
188		switch (IFM_SUBTYPE(ife->ifm_media)) {
189		case IFM_AUTO:
190			/*
191			 * If we're already in auto mode, just return.
192			 */
193			if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN)
194				return (0);
195			(void) mii_phy_auto(sc);
196			break;
197		case IFM_100_T4:
198			/*
199			 * XXX Not supported as a manual setting right now.
200			 */
201			return (EINVAL);
202		default:
203			/*
204			 * BMCR data is stored in the ifmedia entry.
205			 */
206			PHY_WRITE(sc, MII_ANAR,
207			    mii_anar(ife->ifm_media));
208			PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
209		}
210		break;
211
212	case MII_TICK:
213		/*
214		 * If we're not currently selected, just return.
215		 */
216		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
217			return (0);
218		if (mii_phy_tick(sc) == EJUSTRETURN)
219			return (0);
220		break;
221	}
222
223	/* Update the media status. */
224	amphy_status(sc);
225
226	/* Callback if something changed. */
227	mii_phy_update(sc, cmd);
228	return (0);
229}
230
231static void
232amphy_status(sc)
233	struct mii_softc *sc;
234{
235	struct mii_data *mii = sc->mii_pdata;
236	int bmsr, bmcr, par, anlpar;
237
238	mii->mii_media_status = IFM_AVALID;
239	mii->mii_media_active = IFM_ETHER;
240
241	bmsr = PHY_READ(sc, MII_BMSR) |
242	    PHY_READ(sc, MII_BMSR);
243	if (bmsr & BMSR_LINK)
244		mii->mii_media_status |= IFM_ACTIVE;
245
246	bmcr = PHY_READ(sc, MII_BMCR);
247	if (bmcr & BMCR_ISO) {
248		mii->mii_media_active |= IFM_NONE;
249		mii->mii_media_status = 0;
250		return;
251	}
252
253	if (bmcr & BMCR_LOOP)
254		mii->mii_media_active |= IFM_LOOP;
255
256	if (bmcr & BMCR_AUTOEN) {
257		/*
258		 * The PAR status bits are only valid of autonegotiation
259		 * has completed (or it's disabled).
260		 */
261		if ((bmsr & BMSR_ACOMP) == 0) {
262			/* Erg, still trying, I guess... */
263			mii->mii_media_active |= IFM_NONE;
264			return;
265		}
266
267		if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
268			anlpar = PHY_READ(sc, MII_ANAR) &
269			    PHY_READ(sc, MII_ANLPAR);
270			if (anlpar & ANLPAR_T4)
271				mii->mii_media_active |= IFM_100_T4;
272			else if (anlpar & ANLPAR_TX_FD)
273				mii->mii_media_active |= IFM_100_TX|IFM_FDX;
274			else if (anlpar & ANLPAR_TX)
275				mii->mii_media_active |= IFM_100_TX;
276			else if (anlpar & ANLPAR_10_FD)
277				mii->mii_media_active |= IFM_10_T|IFM_FDX;
278			else if (anlpar & ANLPAR_10)
279				mii->mii_media_active |= IFM_10_T;
280			else
281				mii->mii_media_active |= IFM_NONE;
282			return;
283		}
284
285		/*
286		 * Link partner is not capable of autonegotiation.
287		 */
288		par = PHY_READ(sc, MII_AMPHY_DSCSR);
289		if (par & DSCSR_100FDX)
290			mii->mii_media_active |= IFM_100_TX|IFM_FDX;
291		else if (par & DSCSR_100HDX)
292			mii->mii_media_active |= IFM_100_TX;
293		else if (par & DSCSR_10FDX)
294			mii->mii_media_active |= IFM_10_T|IFM_HDX;
295		else if (par & DSCSR_10HDX)
296			mii->mii_media_active |= IFM_10_T;
297	} else
298		mii->mii_media_active = mii_media_from_bmcr(bmcr);
299}
300