ip1000phy.c revision 217412 
1/*-
2 * Copyright (c) 2006, Pyun YongHyeon <yongari@FreeBSD.org>
3 * 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 unmodified, this list of conditions, and the following
10 *    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 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: head/sys/dev/mii/ip1000phy.c 217412 2011-01-14 19:16:59Z marius $");
31
32/*
33 * Driver for the IC Plus IP1000A/IP1001 10/100/1000 PHY.
34 */
35
36#include <sys/param.h>
37#include <sys/systm.h>
38#include <sys/kernel.h>
39#include <sys/module.h>
40#include <sys/socket.h>
41#include <sys/bus.h>
42
43#include <net/if.h>
44#include <net/if_media.h>
45
46#include <dev/mii/mii.h>
47#include <dev/mii/miivar.h>
48#include "miidevs.h"
49
50#include <dev/mii/ip1000phyreg.h>
51
52#include "miibus_if.h"
53
54#include <machine/bus.h>
55#include <dev/stge/if_stgereg.h>
56
57static int ip1000phy_probe(device_t);
58static int ip1000phy_attach(device_t);
59
60struct ip1000phy_softc {
61	struct mii_softc mii_sc;
62	int model;
63	int revision;
64};
65
66static device_method_t ip1000phy_methods[] = {
67	/* device interface */
68	DEVMETHOD(device_probe,		ip1000phy_probe),
69	DEVMETHOD(device_attach,	ip1000phy_attach),
70	DEVMETHOD(device_detach,	mii_phy_detach),
71	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
72	{ 0, 0 }
73};
74
75static devclass_t ip1000phy_devclass;
76static driver_t ip1000phy_driver = {
77	"ip1000phy",
78	ip1000phy_methods,
79	sizeof (struct mii_softc)
80};
81
82DRIVER_MODULE(ip1000phy, miibus, ip1000phy_driver, ip1000phy_devclass, 0, 0);
83
84static int	ip1000phy_service(struct mii_softc *, struct mii_data *, int);
85static void	ip1000phy_status(struct mii_softc *);
86static void	ip1000phy_reset(struct mii_softc *);
87static int	ip1000phy_mii_phy_auto(struct mii_softc *, int);
88
89static const struct mii_phydesc ip1000phys[] = {
90	MII_PHY_DESC(ICPLUS, IP1000A),
91	MII_PHY_DESC(ICPLUS, IP1001),
92	MII_PHY_END
93};
94
95static int
96ip1000phy_probe(device_t dev)
97{
98
99	return (mii_phy_dev_probe(dev, ip1000phys, BUS_PROBE_DEFAULT));
100}
101
102static int
103ip1000phy_attach(device_t dev)
104{
105	struct ip1000phy_softc *isc;
106	struct mii_softc *sc;
107	struct mii_attach_args *ma;
108	struct mii_data *mii;
109
110	isc = device_get_softc(dev);
111	sc = &isc->mii_sc;
112	ma = device_get_ivars(dev);
113	sc->mii_dev = device_get_parent(dev);
114	mii = ma->mii_data;
115	LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
116
117	sc->mii_flags = miibus_get_flags(dev);
118	sc->mii_inst = mii->mii_instance++;
119	sc->mii_phy = ma->mii_phyno;
120	sc->mii_service = ip1000phy_service;
121	sc->mii_pdata = mii;
122
123	sc->mii_flags |= MIIF_NOISOLATE | MIIF_NOMANPAUSE;
124
125	isc->model = MII_MODEL(ma->mii_id2);
126	isc->revision = MII_REV(ma->mii_id2);
127	if (isc->model == MII_MODEL_ICPLUS_IP1000A &&
128	     strcmp(mii->mii_ifp->if_dname, "stge") == 0 &&
129	     (sc->mii_flags & MIIF_MACPRIV0) != 0)
130		sc->mii_flags |= MIIF_PHYPRIV0;
131
132	sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
133	if (sc->mii_capabilities & BMSR_EXTSTAT)
134		sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
135	device_printf(dev, " ");
136
137	ip1000phy_reset(sc);
138	mii_phy_add_media(sc);
139	printf("\n");
140
141	MIIBUS_MEDIAINIT(sc->mii_dev);
142	return (0);
143}
144
145static int
146ip1000phy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
147{
148	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
149	uint32_t gig, reg, speed;
150
151	switch (cmd) {
152	case MII_POLLSTAT:
153		break;
154
155	case MII_MEDIACHG:
156		/*
157		 * If the interface is not up, don't do anything.
158		 */
159		if ((mii->mii_ifp->if_flags & IFF_UP) == 0) {
160			break;
161		}
162
163		ip1000phy_reset(sc);
164		switch (IFM_SUBTYPE(ife->ifm_media)) {
165		case IFM_AUTO:
166			(void)ip1000phy_mii_phy_auto(sc, ife->ifm_media);
167			goto done;
168
169		case IFM_1000_T:
170			/*
171			 * XXX
172			 * Manual 1000baseT setting doesn't seem to work.
173			 */
174			speed = IP1000PHY_BMCR_1000;
175			break;
176
177		case IFM_100_TX:
178			speed = IP1000PHY_BMCR_100;
179			break;
180
181		case IFM_10_T:
182			speed = IP1000PHY_BMCR_10;
183			break;
184
185		default:
186			return (EINVAL);
187		}
188
189		if ((ife->ifm_media & IFM_FDX) != 0) {
190			speed |= IP1000PHY_BMCR_FDX;
191			gig = IP1000PHY_1000CR_1000T_FDX;
192		} else
193			gig = IP1000PHY_1000CR_1000T;
194
195		if (IFM_SUBTYPE(ife->ifm_media) == IFM_1000_T) {
196			gig |=
197			    IP1000PHY_1000CR_MASTER | IP1000PHY_1000CR_MANUAL;
198			if ((ife->ifm_media & IFM_ETH_MASTER) != 0)
199				gig |= IP1000PHY_1000CR_MMASTER;
200		} else
201			gig = 0;
202		PHY_WRITE(sc, IP1000PHY_MII_1000CR, gig);
203		PHY_WRITE(sc, IP1000PHY_MII_BMCR, speed);
204
205done:
206		break;
207
208	case MII_TICK:
209		/*
210		 * Is the interface even up?
211		 */
212		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
213			return (0);
214
215		/*
216		 * Only used for autonegotiation.
217		 */
218		if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
219			sc->mii_ticks = 0;
220			break;
221		}
222
223		/*
224		 * check for link.
225		 */
226		reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
227		if (reg & BMSR_LINK) {
228			sc->mii_ticks = 0;
229			break;
230		}
231
232		/* Announce link loss right after it happens */
233		if (sc->mii_ticks++ == 0)
234			break;
235
236		/*
237		 * Only retry autonegotiation every mii_anegticks seconds.
238		 */
239		if (sc->mii_ticks <= sc->mii_anegticks)
240			break;
241
242		sc->mii_ticks = 0;
243		ip1000phy_mii_phy_auto(sc, ife->ifm_media);
244		break;
245	}
246
247	/* Update the media status. */
248	ip1000phy_status(sc);
249
250	/* Callback if something changed. */
251	mii_phy_update(sc, cmd);
252	return (0);
253}
254
255static void
256ip1000phy_status(struct mii_softc *sc)
257{
258	struct ip1000phy_softc *isc;
259	struct mii_data *mii = sc->mii_pdata;
260	uint32_t bmsr, bmcr, stat;
261
262	isc = (struct ip1000phy_softc *)sc;
263
264	mii->mii_media_status = IFM_AVALID;
265	mii->mii_media_active = IFM_ETHER;
266
267	bmsr = PHY_READ(sc, IP1000PHY_MII_BMSR) |
268	    PHY_READ(sc, IP1000PHY_MII_BMSR);
269	if ((bmsr & IP1000PHY_BMSR_LINK) != 0)
270		mii->mii_media_status |= IFM_ACTIVE;
271
272	bmcr = PHY_READ(sc, IP1000PHY_MII_BMCR);
273	if ((bmcr & IP1000PHY_BMCR_LOOP) != 0)
274		mii->mii_media_active |= IFM_LOOP;
275
276	if ((bmcr & IP1000PHY_BMCR_AUTOEN) != 0) {
277		if ((bmsr & IP1000PHY_BMSR_ANEGCOMP) == 0) {
278			/* Erg, still trying, I guess... */
279			mii->mii_media_active |= IFM_NONE;
280			return;
281                }
282        }
283
284	if (isc->model == MII_MODEL_ICPLUS_IP1001) {
285		stat = PHY_READ(sc, IP1000PHY_LSR);
286		switch (stat & IP1000PHY_LSR_SPEED_MASK) {
287		case IP1000PHY_LSR_SPEED_10:
288			mii->mii_media_active |= IFM_10_T;
289			break;
290		case IP1000PHY_LSR_SPEED_100:
291			mii->mii_media_active |= IFM_100_TX;
292			break;
293		case IP1000PHY_LSR_SPEED_1000:
294			mii->mii_media_active |= IFM_1000_T;
295			break;
296		default:
297			mii->mii_media_active |= IFM_NONE;
298			return;
299		}
300		if ((stat & IP1000PHY_LSR_FULL_DUPLEX) != 0)
301			mii->mii_media_active |= IFM_FDX;
302		else
303			mii->mii_media_active |= IFM_HDX;
304	} else {
305		stat = PHY_READ(sc, STGE_PhyCtrl);
306		switch (PC_LinkSpeed(stat)) {
307		case PC_LinkSpeed_Down:
308			mii->mii_media_active |= IFM_NONE;
309			return;
310		case PC_LinkSpeed_10:
311			mii->mii_media_active |= IFM_10_T;
312			break;
313		case PC_LinkSpeed_100:
314			mii->mii_media_active |= IFM_100_TX;
315			break;
316		case PC_LinkSpeed_1000:
317			mii->mii_media_active |= IFM_1000_T;
318			break;
319		default:
320			mii->mii_media_active |= IFM_NONE;
321			return;
322		}
323		if ((stat & PC_PhyDuplexStatus) != 0)
324			mii->mii_media_active |= IFM_FDX;
325		else
326			mii->mii_media_active |= IFM_HDX;
327	}
328
329	if ((mii->mii_media_active & IFM_FDX) != 0)
330		mii->mii_media_active |= mii_phy_flowstatus(sc);
331
332	if ((mii->mii_media_active & IFM_1000_T) != 0) {
333		stat = PHY_READ(sc, IP1000PHY_MII_1000SR);
334		if ((stat & IP1000PHY_1000SR_MASTER) != 0)
335			mii->mii_media_active |= IFM_ETH_MASTER;
336	}
337}
338
339static int
340ip1000phy_mii_phy_auto(struct mii_softc *sc, int media)
341{
342	struct ip1000phy_softc *isc;
343	uint32_t reg;
344
345	isc = (struct ip1000phy_softc *)sc;
346	reg = 0;
347	if (isc->model == MII_MODEL_ICPLUS_IP1001) {
348		reg = PHY_READ(sc, IP1000PHY_MII_ANAR);
349		reg &= ~(IP1000PHY_ANAR_PAUSE | IP1000PHY_ANAR_APAUSE);
350		reg |= IP1000PHY_ANAR_NP;
351	}
352	reg |= IP1000PHY_ANAR_10T | IP1000PHY_ANAR_10T_FDX |
353	    IP1000PHY_ANAR_100TX | IP1000PHY_ANAR_100TX_FDX;
354	if ((media & IFM_FLOW) != 0 || (sc->mii_flags & MIIF_FORCEPAUSE) != 0)
355		reg |= IP1000PHY_ANAR_PAUSE | IP1000PHY_ANAR_APAUSE;
356	PHY_WRITE(sc, IP1000PHY_MII_ANAR, reg | IP1000PHY_ANAR_CSMA);
357
358	reg = IP1000PHY_1000CR_1000T | IP1000PHY_1000CR_1000T_FDX;
359	reg |= IP1000PHY_1000CR_MASTER;
360	PHY_WRITE(sc, IP1000PHY_MII_1000CR, reg);
361	PHY_WRITE(sc, IP1000PHY_MII_BMCR, (IP1000PHY_BMCR_FDX |
362	    IP1000PHY_BMCR_AUTOEN | IP1000PHY_BMCR_STARTNEG));
363
364	return (EJUSTRETURN);
365}
366
367static void
368ip1000phy_load_dspcode(struct mii_softc *sc)
369{
370
371	PHY_WRITE(sc, 31, 0x0001);
372	PHY_WRITE(sc, 27, 0x01e0);
373	PHY_WRITE(sc, 31, 0x0002);
374	PHY_WRITE(sc, 27, 0xeb8e);
375	PHY_WRITE(sc, 31, 0x0000);
376	PHY_WRITE(sc, 30, 0x005e);
377	PHY_WRITE(sc, 9, 0x0700);
378
379	DELAY(50);
380}
381
382static void
383ip1000phy_reset(struct mii_softc *sc)
384{
385	uint32_t reg;
386
387	mii_phy_reset(sc);
388
389	/* clear autoneg/full-duplex as we don't want it after reset */
390	reg = PHY_READ(sc, IP1000PHY_MII_BMCR);
391	reg &= ~(IP1000PHY_BMCR_AUTOEN | IP1000PHY_BMCR_FDX);
392	PHY_WRITE(sc, MII_BMCR, reg);
393
394	if ((sc->mii_flags & MIIF_PHYPRIV0) != 0)
395		ip1000phy_load_dspcode(sc);
396}
397