ciphy.c revision 217413 
1/*-
2 * Copyright (c) 2004
3 *	Bill Paul <wpaul@windriver.com>.  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
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: head/sys/dev/mii/ciphy.c 217413 2011-01-14 19:29:53Z marius $");
35
36/*
37 * Driver for the Cicada/Vitesse CS/VSC8xxx 10/100/1000 copper PHY.
38 */
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/kernel.h>
43#include <sys/module.h>
44#include <sys/socket.h>
45#include <sys/bus.h>
46
47#include <net/if.h>
48#include <net/if_arp.h>
49#include <net/if_media.h>
50
51#include <dev/mii/mii.h>
52#include <dev/mii/miivar.h>
53#include "miidevs.h"
54
55#include <dev/mii/ciphyreg.h>
56
57#include "miibus_if.h"
58
59#include <machine/bus.h>
60
61static int ciphy_probe(device_t);
62static int ciphy_attach(device_t);
63
64static device_method_t ciphy_methods[] = {
65	/* device interface */
66	DEVMETHOD(device_probe,		ciphy_probe),
67	DEVMETHOD(device_attach,	ciphy_attach),
68	DEVMETHOD(device_detach,	mii_phy_detach),
69	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
70	{ 0, 0 }
71};
72
73static devclass_t ciphy_devclass;
74
75static driver_t ciphy_driver = {
76	"ciphy",
77	ciphy_methods,
78	sizeof(struct mii_softc)
79};
80
81DRIVER_MODULE(ciphy, miibus, ciphy_driver, ciphy_devclass, 0, 0);
82
83static int	ciphy_service(struct mii_softc *, struct mii_data *, int);
84static void	ciphy_status(struct mii_softc *);
85static void	ciphy_reset(struct mii_softc *);
86static void	ciphy_fixup(struct mii_softc *);
87
88static const struct mii_phydesc ciphys[] = {
89	MII_PHY_DESC(CICADA, CS8201),
90	MII_PHY_DESC(CICADA, CS8201A),
91	MII_PHY_DESC(CICADA, CS8201B),
92	MII_PHY_DESC(CICADA, CS8204),
93	MII_PHY_DESC(CICADA, VSC8211),
94	MII_PHY_DESC(CICADA, CS8244),
95	MII_PHY_DESC(VITESSE, VSC8601),
96	MII_PHY_END
97};
98
99static int
100ciphy_probe(device_t dev)
101{
102
103	return (mii_phy_dev_probe(dev, ciphys, BUS_PROBE_DEFAULT));
104}
105
106static int
107ciphy_attach(device_t dev)
108{
109	struct mii_softc *sc;
110	struct mii_attach_args *ma;
111	struct mii_data *mii;
112
113	sc = device_get_softc(dev);
114	ma = device_get_ivars(dev);
115	sc->mii_dev = device_get_parent(dev);
116	mii = ma->mii_data;
117	LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
118
119	sc->mii_flags = miibus_get_flags(dev);
120	sc->mii_inst = mii->mii_instance++;
121	sc->mii_phy = ma->mii_phyno;
122	sc->mii_service = ciphy_service;
123	sc->mii_pdata = mii;
124
125	sc->mii_flags |= MIIF_NOISOLATE;
126
127	ciphy_reset(sc);
128
129	sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
130	if (sc->mii_capabilities & BMSR_EXTSTAT)
131		sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
132	device_printf(dev, " ");
133	mii_phy_add_media(sc);
134	printf("\n");
135
136	MIIBUS_MEDIAINIT(sc->mii_dev);
137	return (0);
138}
139
140static int
141ciphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
142{
143	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
144	int reg, speed, gig;
145
146	switch (cmd) {
147	case MII_POLLSTAT:
148		break;
149
150	case MII_MEDIACHG:
151		/*
152		 * If the interface is not up, don't do anything.
153		 */
154		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
155			break;
156
157		ciphy_fixup(sc);	/* XXX hardware bug work-around */
158
159		switch (IFM_SUBTYPE(ife->ifm_media)) {
160		case IFM_AUTO:
161#ifdef foo
162			/*
163			 * If we're already in auto mode, just return.
164			 */
165			if (PHY_READ(sc, CIPHY_MII_BMCR) & CIPHY_BMCR_AUTOEN)
166				return (0);
167#endif
168			(void)mii_phy_auto(sc);
169			break;
170		case IFM_1000_T:
171			speed = CIPHY_S1000;
172			goto setit;
173		case IFM_100_TX:
174			speed = CIPHY_S100;
175			goto setit;
176		case IFM_10_T:
177			speed = CIPHY_S10;
178setit:
179			if ((ife->ifm_media & IFM_FDX) != 0) {
180				speed |= CIPHY_BMCR_FDX;
181				gig = CIPHY_1000CTL_AFD;
182			} else
183				gig = CIPHY_1000CTL_AHD;
184
185			if (IFM_SUBTYPE(ife->ifm_media) == IFM_1000_T) {
186				gig |= CIPHY_1000CTL_MSE;
187				if ((ife->ifm_media & IFM_ETH_MASTER) != 0)
188					gig |= CIPHY_1000CTL_MSC;
189				speed |=
190				    CIPHY_BMCR_AUTOEN | CIPHY_BMCR_STARTNEG;
191			} else
192				gig = 0;
193			PHY_WRITE(sc, CIPHY_MII_1000CTL, gig);
194			PHY_WRITE(sc, CIPHY_MII_BMCR, speed);
195			PHY_WRITE(sc, CIPHY_MII_ANAR, CIPHY_SEL_TYPE);
196			break;
197		case IFM_NONE:
198			PHY_WRITE(sc, MII_BMCR, BMCR_ISO | BMCR_PDOWN);
199			break;
200		default:
201			return (EINVAL);
202		}
203		break;
204
205	case MII_TICK:
206		/*
207		 * Is the interface even up?
208		 */
209		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
210			return (0);
211
212		/*
213		 * Only used for autonegotiation.
214		 */
215		if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
216			break;
217
218		/*
219		 * Check to see if we have link.  If we do, we don't
220		 * need to restart the autonegotiation process.  Read
221		 * the BMSR twice in case it's latched.
222		 */
223		reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
224		if (reg & BMSR_LINK)
225			break;
226
227		/* Announce link loss right after it happens. */
228		if (++sc->mii_ticks == 0)
229			break;
230		/*
231		 * Only retry autonegotiation every mii_anegticks seconds.
232		 */
233		if (sc->mii_ticks <= sc->mii_anegticks)
234			break;
235
236		sc->mii_ticks = 0;
237		mii_phy_auto(sc);
238		break;
239	}
240
241	/* Update the media status. */
242	ciphy_status(sc);
243
244	/*
245	 * Callback if something changed. Note that we need to poke
246	 * apply fixups for certain PHY revs.
247	 */
248	if (sc->mii_media_active != mii->mii_media_active ||
249	    sc->mii_media_status != mii->mii_media_status ||
250	    cmd == MII_MEDIACHG) {
251		ciphy_fixup(sc);
252	}
253	mii_phy_update(sc, cmd);
254	return (0);
255}
256
257static void
258ciphy_status(struct mii_softc *sc)
259{
260	struct mii_data *mii = sc->mii_pdata;
261	int bmsr, bmcr;
262
263	mii->mii_media_status = IFM_AVALID;
264	mii->mii_media_active = IFM_ETHER;
265
266	bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
267
268	if (bmsr & BMSR_LINK)
269		mii->mii_media_status |= IFM_ACTIVE;
270
271	bmcr = PHY_READ(sc, CIPHY_MII_BMCR);
272
273	if (bmcr & CIPHY_BMCR_LOOP)
274		mii->mii_media_active |= IFM_LOOP;
275
276	if (bmcr & CIPHY_BMCR_AUTOEN) {
277		if ((bmsr & CIPHY_BMSR_ACOMP) == 0) {
278			/* Erg, still trying, I guess... */
279			mii->mii_media_active |= IFM_NONE;
280			return;
281		}
282	}
283
284	bmsr = PHY_READ(sc, CIPHY_MII_AUXCSR);
285	switch (bmsr & CIPHY_AUXCSR_SPEED) {
286	case CIPHY_SPEED10:
287		mii->mii_media_active |= IFM_10_T;
288		break;
289	case CIPHY_SPEED100:
290		mii->mii_media_active |= IFM_100_TX;
291		break;
292	case CIPHY_SPEED1000:
293		mii->mii_media_active |= IFM_1000_T;
294		break;
295	default:
296		device_printf(sc->mii_dev, "unknown PHY speed %x\n",
297		    bmsr & CIPHY_AUXCSR_SPEED);
298		break;
299	}
300
301	if (bmsr & CIPHY_AUXCSR_FDX)
302		mii->mii_media_active |= IFM_FDX;
303	else
304		mii->mii_media_active |= IFM_HDX;
305
306	if ((IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_T) &&
307	   (PHY_READ(sc, CIPHY_MII_1000STS) & CIPHY_1000STS_MSR) != 0)
308		mii->mii_media_active |= IFM_ETH_MASTER;
309}
310
311static void
312ciphy_reset(struct mii_softc *sc)
313{
314
315	mii_phy_reset(sc);
316	DELAY(1000);
317}
318
319#define PHY_SETBIT(x, y, z) \
320	PHY_WRITE(x, y, (PHY_READ(x, y) | (z)))
321#define PHY_CLRBIT(x, y, z) \
322	PHY_WRITE(x, y, (PHY_READ(x, y) & ~(z)))
323
324static void
325ciphy_fixup(struct mii_softc *sc)
326{
327	uint16_t		model;
328	uint16_t		status, speed;
329	uint16_t		val;
330
331	model = MII_MODEL(PHY_READ(sc, CIPHY_MII_PHYIDR2));
332	status = PHY_READ(sc, CIPHY_MII_AUXCSR);
333	speed = status & CIPHY_AUXCSR_SPEED;
334
335	if (strcmp(device_get_name(device_get_parent(sc->mii_dev)),
336	    "nfe") == 0) {
337		/* need to set for 2.5V RGMII for NVIDIA adapters */
338		val = PHY_READ(sc, CIPHY_MII_ECTL1);
339		val &= ~(CIPHY_ECTL1_IOVOL | CIPHY_ECTL1_INTSEL);
340		val |= (CIPHY_IOVOL_2500MV | CIPHY_INTSEL_RGMII);
341		PHY_WRITE(sc, CIPHY_MII_ECTL1, val);
342		/* From Linux. */
343		val = PHY_READ(sc, CIPHY_MII_AUXCSR);
344		val |= CIPHY_AUXCSR_MDPPS;
345		PHY_WRITE(sc, CIPHY_MII_AUXCSR, val);
346		val = PHY_READ(sc, CIPHY_MII_10BTCSR);
347		val |= CIPHY_10BTCSR_ECHO;
348		PHY_WRITE(sc, CIPHY_MII_10BTCSR, val);
349	}
350
351	switch (model) {
352	case MII_MODEL_CICADA_CS8204:
353	case MII_MODEL_CICADA_CS8201:
354
355		/* Turn off "aux mode" (whatever that means) */
356		PHY_SETBIT(sc, CIPHY_MII_AUXCSR, CIPHY_AUXCSR_MDPPS);
357
358		/*
359		 * Work around speed polling bug in VT3119/VT3216
360		 * when using MII in full duplex mode.
361		 */
362		if ((speed == CIPHY_SPEED10 || speed == CIPHY_SPEED100) &&
363		    (status & CIPHY_AUXCSR_FDX)) {
364			PHY_SETBIT(sc, CIPHY_MII_10BTCSR, CIPHY_10BTCSR_ECHO);
365		} else {
366			PHY_CLRBIT(sc, CIPHY_MII_10BTCSR, CIPHY_10BTCSR_ECHO);
367		}
368
369		/* Enable link/activity LED blink. */
370		PHY_SETBIT(sc, CIPHY_MII_LED, CIPHY_LED_LINKACTBLINK);
371
372		break;
373
374	case MII_MODEL_CICADA_CS8201A:
375	case MII_MODEL_CICADA_CS8201B:
376
377		/*
378		 * Work around speed polling bug in VT3119/VT3216
379		 * when using MII in full duplex mode.
380		 */
381		if ((speed == CIPHY_SPEED10 || speed == CIPHY_SPEED100) &&
382		    (status & CIPHY_AUXCSR_FDX)) {
383			PHY_SETBIT(sc, CIPHY_MII_10BTCSR, CIPHY_10BTCSR_ECHO);
384		} else {
385			PHY_CLRBIT(sc, CIPHY_MII_10BTCSR, CIPHY_10BTCSR_ECHO);
386		}
387
388		break;
389	case MII_MODEL_CICADA_VSC8211:
390	case MII_MODEL_CICADA_CS8244:
391	case MII_MODEL_VITESSE_VSC8601:
392		break;
393	default:
394		device_printf(sc->mii_dev, "unknown CICADA PHY model %x\n",
395		    model);
396		break;
397	}
398}
399