lxtphy.c revision 150763 
1/*	OpenBSD: lxtphy.c,v 1.5 2000/08/26 20:04:17 nate Exp 	*/
2/*	NetBSD: lxtphy.c,v 1.19 2000/02/02 23:34:57 thorpej Exp 	*/
3
4/*-
5 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
10 * NASA Ames Research Center.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 *    must display the following acknowledgement:
22 *	This product includes software developed by the NetBSD
23 *	Foundation, Inc. and its contributors.
24 * 4. Neither the name of The NetBSD Foundation nor the names of its
25 *    contributors may be used to endorse or promote products derived
26 *    from this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
29 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
31 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
32 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38 * POSSIBILITY OF SUCH DAMAGE.
39 */
40
41/*-
42 * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
43 *
44 * Redistribution and use in source and binary forms, with or without
45 * modification, are permitted provided that the following conditions
46 * are met:
47 * 1. Redistributions of source code must retain the above copyright
48 *    notice, this list of conditions and the following disclaimer.
49 * 2. Redistributions in binary form must reproduce the above copyright
50 *    notice, this list of conditions and the following disclaimer in the
51 *    documentation and/or other materials provided with the distribution.
52 * 3. All advertising materials mentioning features or use of this software
53 *    must display the following acknowledgement:
54 *	This product includes software developed by Manuel Bouyer.
55 * 4. The name of the author may not be used to endorse or promote products
56 *    derived from this software without specific prior written permission.
57 *
58 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
59 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
60 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
61 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
62 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
63 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
64 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
65 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
66 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
67 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
68 */
69
70#include <sys/cdefs.h>
71__FBSDID("$FreeBSD: head/sys/dev/mii/lxtphy.c 150763 2005-09-30 19:39:27Z imp $");
72
73/*
74 * driver for Level One's LXT-970 ethernet 10/100 PHY
75 * datasheet from www.level1.com
76 */
77
78#include <sys/param.h>
79#include <sys/systm.h>
80#include <sys/kernel.h>
81#include <sys/socket.h>
82#include <sys/errno.h>
83#include <sys/module.h>
84#include <sys/bus.h>
85
86#include <net/if.h>
87#include <net/if_media.h>
88
89#include <dev/mii/mii.h>
90#include <dev/mii/miivar.h>
91#include "miidevs.h"
92
93#include <dev/mii/lxtphyreg.h>
94
95#include "miibus_if.h"
96
97static int lxtphy_probe(device_t);
98static int lxtphy_attach(device_t);
99
100static device_method_t lxtphy_methods[] = {
101	/* device interface */
102	DEVMETHOD(device_probe,		lxtphy_probe),
103	DEVMETHOD(device_attach,	lxtphy_attach),
104	DEVMETHOD(device_detach,	mii_phy_detach),
105	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
106	{ 0, 0 }
107};
108
109static devclass_t lxtphy_devclass;
110
111static driver_t lxtphy_driver = {
112	"lxtphy",
113	lxtphy_methods,
114	sizeof(struct mii_softc)
115};
116
117DRIVER_MODULE(lxtphy, miibus, lxtphy_driver, lxtphy_devclass, 0, 0);
118
119static int	lxtphy_service(struct mii_softc *, struct mii_data *, int);
120static void	lxtphy_status(struct mii_softc *);
121static void	lxtphy_set_tp(struct mii_softc *);
122static void	lxtphy_set_fx(struct mii_softc *);
123
124static int
125lxtphy_probe(device_t dev)
126{
127	struct mii_attach_args *ma;
128
129	ma = device_get_ivars(dev);
130
131	if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxLEVEL1 &&
132	    MII_MODEL(ma->mii_id2) == MII_MODEL_xxLEVEL1_LXT970) {
133		device_set_desc(dev, MII_STR_xxLEVEL1_LXT970);
134	} else
135		return (ENXIO);
136
137	return (0);
138}
139
140static int
141lxtphy_attach(device_t dev)
142{
143	struct mii_softc *sc;
144	struct mii_attach_args *ma;
145	struct mii_data *mii;
146
147	sc = device_get_softc(dev);
148	ma = device_get_ivars(dev);
149	sc->mii_dev = device_get_parent(dev);
150	mii = device_get_softc(sc->mii_dev);
151	LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
152
153	sc->mii_inst = mii->mii_instance;
154	sc->mii_phy = ma->mii_phyno;
155	sc->mii_service = lxtphy_service;
156	sc->mii_pdata = mii;
157	sc->mii_flags |= MIIF_NOISOLATE;
158
159	mii_phy_reset(sc);
160
161	mii->mii_instance++;
162
163	sc->mii_capabilities =
164	    PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
165	device_printf(dev, " ");
166
167#define	ADD(m, c)	ifmedia_add(&mii->mii_media, (m), (c), NULL)
168	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
169	    BMCR_ISO);
170	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, 0, sc->mii_inst),
171	    BMCR_S100);
172	printf("100baseFX, ");
173	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, IFM_FDX, sc->mii_inst),
174	    BMCR_S100|BMCR_FDX);
175	printf("100baseFX-FDX, ");
176#undef ADD
177
178	mii_add_media(sc);
179	printf("\n");
180
181	MIIBUS_MEDIAINIT(sc->mii_dev);
182	return(0);
183}
184
185static int
186lxtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
187{
188	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
189	int reg;
190
191	switch (cmd) {
192	case MII_POLLSTAT:
193		/*
194		 * If we're not polling our PHY instance, just return.
195		 */
196		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
197			return (0);
198		break;
199
200	case MII_MEDIACHG:
201		/*
202		 * If the media indicates a different PHY instance,
203		 * isolate ourselves.
204		 */
205		if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
206			reg = PHY_READ(sc, MII_BMCR);
207			PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
208			return (0);
209		}
210
211		/*
212		 * If the interface is not up, don't do anything.
213		 */
214		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
215			break;
216
217		switch (IFM_SUBTYPE(ife->ifm_media)) {
218		case IFM_AUTO:
219			/*
220			 * If we're already in auto mode, just return.
221			 */
222			if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN)
223				return (0);
224
225			lxtphy_set_tp(sc);
226
227			(void) mii_phy_auto(sc);
228			break;
229		case IFM_100_T4:
230			/*
231			 * XXX Not supported as a manual setting right now.
232			 */
233			return (EINVAL);
234
235		case IFM_100_FX:
236			lxtphy_set_fx(sc);
237			/* XXX: fall though intentional ?? */
238		default:
239			/*
240			 * BMCR data is stored in the ifmedia entry.
241			 */
242			PHY_WRITE(sc, MII_ANAR,
243			    mii_anar(ife->ifm_media));
244			PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
245		}
246		break;
247
248	case MII_TICK:
249		/*
250		 * If we're not currently selected, just return.
251		 */
252		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
253			return (0);
254		if (mii_phy_tick(sc) == EJUSTRETURN)
255			return (0);
256		break;
257	}
258
259	/* Update the media status. */
260	lxtphy_status(sc);
261
262	/* Callback if something changed. */
263	mii_phy_update(sc, cmd);
264	return (0);
265}
266
267static void
268lxtphy_status(struct mii_softc *sc)
269{
270	struct mii_data *mii = sc->mii_pdata;
271	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
272	int bmcr, bmsr, csr;
273
274	mii->mii_media_status = IFM_AVALID;
275	mii->mii_media_active = IFM_ETHER;
276
277	/*
278	 * Get link status from the CSR; we need to read the CSR
279	 * for media type anyhow, and the link status in the CSR
280	 * doens't latch, so fewer register reads are required.
281	 */
282	csr = PHY_READ(sc, MII_LXTPHY_CSR);
283	if (csr & CSR_LINK)
284		mii->mii_media_status |= IFM_ACTIVE;
285
286	bmcr = PHY_READ(sc, MII_BMCR);
287	if (bmcr & BMCR_ISO) {
288		mii->mii_media_active |= IFM_NONE;
289		mii->mii_media_status = 0;
290		return;
291	}
292
293	if (bmcr & BMCR_LOOP)
294		mii->mii_media_active |= IFM_LOOP;
295
296	if (bmcr & BMCR_AUTOEN) {
297		bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
298		if ((bmsr & BMSR_ACOMP) == 0) {
299			/* Erg, still trying, I guess... */
300			mii->mii_media_active |= IFM_NONE;
301			return;
302		}
303		if (csr & CSR_SPEED)
304			mii->mii_media_active |= IFM_100_TX;
305		else
306			mii->mii_media_active |= IFM_10_T;
307		if (csr & CSR_DUPLEX)
308			mii->mii_media_active |= IFM_FDX;
309	} else
310		mii->mii_media_active = ife->ifm_media;
311}
312
313static void
314lxtphy_set_tp(struct mii_softc *sc)
315{
316	int cfg;
317
318	cfg = PHY_READ(sc, MII_LXTPHY_CONFIG);
319	cfg &= ~CONFIG_100BASEFX;
320	PHY_WRITE(sc, MII_LXTPHY_CONFIG, cfg);
321}
322
323static void
324lxtphy_set_fx(struct mii_softc *sc)
325{
326	int cfg;
327
328	cfg = PHY_READ(sc, MII_LXTPHY_CONFIG);
329	cfg |= CONFIG_100BASEFX;
330	PHY_WRITE(sc, MII_LXTPHY_CONFIG, cfg);
331}
332
333