xmphy.c revision 96026 
1/*
2 * Copyright (c) 2000
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/xmphy.c 96026 2002-05-04 11:00:30Z phk $
33 */
34
35/*
36 * driver for the XaQti XMAC II's internal PHY. This is sort of
37 * like a 10/100 PHY, except the only thing we're really autoselecting
38 * here is full/half duplex. Speed is always 1000mbps.
39 */
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/kernel.h>
44#include <sys/malloc.h>
45#include <sys/socket.h>
46#include <sys/bus.h>
47
48
49#include <net/if.h>
50#include <net/if_media.h>
51
52#include <dev/mii/mii.h>
53#include <dev/mii/miivar.h>
54#include <dev/mii/miidevs.h>
55
56#include <dev/mii/xmphyreg.h>
57
58#include "miibus_if.h"
59
60#if !defined(lint)
61static const char rcsid[] =
62  "$FreeBSD: head/sys/dev/mii/xmphy.c 96026 2002-05-04 11:00:30Z phk $";
63#endif
64
65static int xmphy_probe		(device_t);
66static int xmphy_attach		(device_t);
67
68static device_method_t xmphy_methods[] = {
69	/* device interface */
70	DEVMETHOD(device_probe,		xmphy_probe),
71	DEVMETHOD(device_attach,	xmphy_attach),
72	DEVMETHOD(device_detach,	mii_phy_detach),
73	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
74	{ 0, 0 }
75};
76
77static devclass_t xmphy_devclass;
78
79static driver_t xmphy_driver = {
80	"xmphy",
81	xmphy_methods,
82	sizeof(struct mii_softc)
83};
84
85DRIVER_MODULE(xmphy, miibus, xmphy_driver, xmphy_devclass, 0, 0);
86
87static int	xmphy_service(struct mii_softc *, struct mii_data *, int);
88static void	xmphy_status(struct mii_softc *);
89static int	xmphy_mii_phy_auto(struct mii_softc *);
90
91static int xmphy_probe(dev)
92	device_t		dev;
93{
94	struct mii_attach_args *ma;
95
96	ma = device_get_ivars(dev);
97
98	if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxXAQTI &&
99	    MII_MODEL(ma->mii_id2) == MII_MODEL_XAQTI_XMACII) {
100		device_set_desc(dev, MII_STR_XAQTI_XMACII);
101		return(0);
102	}
103
104	if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_JATO &&
105	    MII_MODEL(ma->mii_id2) == MII_MODEL_JATO_BASEX) {
106		device_set_desc(dev, MII_STR_JATO_BASEX);
107		return(0);
108	}
109
110	return(ENXIO);
111}
112
113static int xmphy_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 = xmphy_service;
130	sc->mii_pdata = mii;
131
132	sc->mii_flags |= MIIF_NOISOLATE;
133	mii->mii_instance++;
134
135#define	ADD(m, c)	ifmedia_add(&mii->mii_media, (m), (c), NULL)
136#define PRINT(s)	printf("%s%s", sep, s); sep = ", "
137
138	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
139	    BMCR_ISO);
140#if 0
141	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
142	    BMCR_LOOP|BMCR_S100);
143#endif
144
145	mii_phy_reset(sc);
146
147	device_printf(dev, " ");
148	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, sc->mii_inst),
149	    XMPHY_BMCR_FDX);
150	PRINT("1000baseSX");
151	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, sc->mii_inst), 0);
152	PRINT("1000baseSX-FDX");
153	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 0);
154	PRINT("auto");
155
156	printf("\n");
157#undef ADD
158#undef PRINT
159
160	MIIBUS_MEDIAINIT(sc->mii_dev);
161	return(0);
162}
163
164static int
165xmphy_service(sc, mii, cmd)
166	struct mii_softc *sc;
167	struct mii_data *mii;
168	int cmd;
169{
170	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
171	int reg;
172
173	switch (cmd) {
174	case MII_POLLSTAT:
175		/*
176		 * If we're not polling our PHY instance, just return.
177		 */
178		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
179			return (0);
180		break;
181
182	case MII_MEDIACHG:
183		/*
184		 * If the media indicates a different PHY instance,
185		 * isolate ourselves.
186		 */
187		if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
188			reg = PHY_READ(sc, MII_BMCR);
189			PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
190			return (0);
191		}
192
193		/*
194		 * If the interface is not up, don't do anything.
195		 */
196		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
197			break;
198
199		switch (IFM_SUBTYPE(ife->ifm_media)) {
200		case IFM_AUTO:
201#ifdef foo
202			/*
203			 * If we're already in auto mode, just return.
204			 */
205			if (PHY_READ(sc, XMPHY_MII_BMCR) & XMPHY_BMCR_AUTOEN)
206				return (0);
207#endif
208			(void) xmphy_mii_phy_auto(sc);
209			break;
210		case IFM_1000_SX:
211			mii_phy_reset(sc);
212			if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
213				PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_FDX);
214				PHY_WRITE(sc, XMPHY_MII_BMCR, XMPHY_BMCR_FDX);
215			} else {
216				PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_HDX);
217				PHY_WRITE(sc, XMPHY_MII_BMCR, 0);
218			}
219			break;
220		case IFM_100_T4:
221		case IFM_100_TX:
222		case IFM_10_T:
223		default:
224			return (EINVAL);
225		}
226		break;
227
228	case MII_TICK:
229		/*
230		 * If we're not currently selected, just return.
231		 */
232		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
233			return (0);
234
235		/*
236		 * Is the interface even up?
237		 */
238		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
239			return (0);
240
241		/*
242		 * Only used for autonegotiation.
243		 */
244		if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
245			break;
246
247		/*
248		 * Check to see if we have link.  If we do, we don't
249		 * need to restart the autonegotiation process.  Read
250		 * the BMSR twice in case it's latched.
251		 */
252		reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
253		if (reg & BMSR_LINK)
254			break;
255
256		/*
257		 * Only retry autonegotiation every 5 seconds.
258		 */
259		if (++sc->mii_ticks != 5)
260			return (0);
261
262		sc->mii_ticks = 0;
263
264		mii_phy_reset(sc);
265		xmphy_mii_phy_auto(sc);
266		return(0);
267	}
268
269	/* Update the media status. */
270	xmphy_status(sc);
271
272	/* Callback if something changed. */
273	mii_phy_update(sc, cmd);
274	return (0);
275}
276
277static void
278xmphy_status(sc)
279	struct mii_softc *sc;
280{
281	struct mii_data *mii = sc->mii_pdata;
282	int bmsr, bmcr, anlpar;
283
284	mii->mii_media_status = IFM_AVALID;
285	mii->mii_media_active = IFM_ETHER;
286
287	bmsr = PHY_READ(sc, XMPHY_MII_BMSR) |
288	    PHY_READ(sc, XMPHY_MII_BMSR);
289	if (bmsr & XMPHY_BMSR_LINK)
290		mii->mii_media_status |= IFM_ACTIVE;
291
292	/* Do dummy read of extended status register. */
293	bmcr = PHY_READ(sc, XMPHY_MII_EXTSTS);
294
295	bmcr = PHY_READ(sc, XMPHY_MII_BMCR);
296
297	if (bmcr & XMPHY_BMCR_LOOP)
298		mii->mii_media_active |= IFM_LOOP;
299
300
301	if (bmcr & XMPHY_BMCR_AUTOEN) {
302		if ((bmsr & XMPHY_BMSR_ACOMP) == 0) {
303			if (bmsr & XMPHY_BMSR_LINK) {
304				mii->mii_media_active |= IFM_1000_SX|IFM_HDX;
305				return;
306			}
307			/* Erg, still trying, I guess... */
308			mii->mii_media_active |= IFM_NONE;
309			return;
310		}
311
312		mii->mii_media_active |= IFM_1000_SX;
313		anlpar = PHY_READ(sc, XMPHY_MII_ANAR) &
314		    PHY_READ(sc, XMPHY_MII_ANLPAR);
315		if (anlpar & XMPHY_ANLPAR_FDX)
316			mii->mii_media_active |= IFM_FDX;
317		else
318			mii->mii_media_active |= IFM_HDX;
319		return;
320	}
321
322	mii->mii_media_active |= IFM_1000_SX;
323	if (bmcr & XMPHY_BMCR_FDX)
324		mii->mii_media_active |= IFM_FDX;
325	else
326		mii->mii_media_active |= IFM_HDX;
327
328	return;
329}
330
331
332static int
333xmphy_mii_phy_auto(mii)
334	struct mii_softc *mii;
335{
336	int anar = 0;
337
338	anar = PHY_READ(mii, XMPHY_MII_ANAR);
339	anar |= XMPHY_ANAR_FDX|XMPHY_ANAR_HDX;
340	PHY_WRITE(mii, XMPHY_MII_ANAR, anar);
341	DELAY(1000);
342	PHY_WRITE(mii, XMPHY_MII_BMCR,
343	    XMPHY_BMCR_AUTOEN | XMPHY_BMCR_STARTNEG);
344
345	return (EJUSTRETURN);
346}
347