ip1000phy.c revision 215297 
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 215297 2010-11-14 13:26:10Z 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_GMASK) & IFM_FDX) != 0) {
190			speed |= IP1000PHY_BMCR_FDX;
191			gig = IP1000PHY_1000CR_1000T_FDX;
192		} else
193			gig = IP1000PHY_1000CR_1000T;
194
195		PHY_WRITE(sc, IP1000PHY_MII_1000CR, 0);
196		PHY_WRITE(sc, IP1000PHY_MII_BMCR, speed);
197
198		if (IFM_SUBTYPE(ife->ifm_media) != IFM_1000_T)
199			break;
200
201		gig |= IP1000PHY_1000CR_MASTER | IP1000PHY_1000CR_MANUAL;
202		if ((ife->ifm_media & IFM_ETH_MASTER) != 0)
203			gig |= IP1000PHY_1000CR_MMASTER;
204		PHY_WRITE(sc, IP1000PHY_MII_1000CR, gig);
205
206done:
207		break;
208
209	case MII_TICK:
210		/*
211		 * Is the interface even up?
212		 */
213		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
214			return (0);
215
216		/*
217		 * Only used for autonegotiation.
218		 */
219		if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
220			sc->mii_ticks = 0;
221			break;
222		}
223
224		/*
225		 * check for link.
226		 */
227		reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
228		if (reg & BMSR_LINK) {
229			sc->mii_ticks = 0;
230			break;
231		}
232
233		/* Announce link loss right after it happens */
234		if (sc->mii_ticks++ == 0)
235			break;
236
237		/*
238		 * Only retry autonegotiation every mii_anegticks seconds.
239		 */
240		if (sc->mii_ticks <= sc->mii_anegticks)
241			break;
242
243		sc->mii_ticks = 0;
244		ip1000phy_mii_phy_auto(sc, ife->ifm_media);
245		break;
246	}
247
248	/* Update the media status. */
249	ip1000phy_status(sc);
250
251	/* Callback if something changed. */
252	mii_phy_update(sc, cmd);
253	return (0);
254}
255
256static void
257ip1000phy_status(struct mii_softc *sc)
258{
259	struct ip1000phy_softc *isc;
260	struct mii_data *mii = sc->mii_pdata;
261	uint32_t bmsr, bmcr, stat;
262
263	isc = (struct ip1000phy_softc *)sc;
264
265	mii->mii_media_status = IFM_AVALID;
266	mii->mii_media_active = IFM_ETHER;
267
268	bmsr = PHY_READ(sc, IP1000PHY_MII_BMSR) |
269	    PHY_READ(sc, IP1000PHY_MII_BMSR);
270	if ((bmsr & IP1000PHY_BMSR_LINK) != 0)
271		mii->mii_media_status |= IFM_ACTIVE;
272
273	bmcr = PHY_READ(sc, IP1000PHY_MII_BMCR);
274	if ((bmcr & IP1000PHY_BMCR_LOOP) != 0)
275		mii->mii_media_active |= IFM_LOOP;
276
277	if ((bmcr & IP1000PHY_BMCR_AUTOEN) != 0) {
278		if ((bmsr & IP1000PHY_BMSR_ANEGCOMP) == 0) {
279			/* Erg, still trying, I guess... */
280			mii->mii_media_active |= IFM_NONE;
281			return;
282                }
283        }
284
285	if (isc->model == MII_MODEL_ICPLUS_IP1001) {
286		stat = PHY_READ(sc, IP1000PHY_LSR);
287		switch (stat & IP1000PHY_LSR_SPEED_MASK) {
288		case IP1000PHY_LSR_SPEED_10:
289			mii->mii_media_active |= IFM_10_T;
290			break;
291		case IP1000PHY_LSR_SPEED_100:
292			mii->mii_media_active |= IFM_100_TX;
293			break;
294		case IP1000PHY_LSR_SPEED_1000:
295			mii->mii_media_active |= IFM_1000_T;
296			break;
297		default:
298			mii->mii_media_active |= IFM_NONE;
299			return;
300		}
301		if ((stat & IP1000PHY_LSR_FULL_DUPLEX) != 0)
302			mii->mii_media_active |= IFM_FDX;
303		else
304			mii->mii_media_active |= IFM_HDX;
305	} else {
306		stat = PHY_READ(sc, STGE_PhyCtrl);
307		switch (PC_LinkSpeed(stat)) {
308		case PC_LinkSpeed_Down:
309			mii->mii_media_active |= IFM_NONE;
310			return;
311		case PC_LinkSpeed_10:
312			mii->mii_media_active |= IFM_10_T;
313			break;
314		case PC_LinkSpeed_100:
315			mii->mii_media_active |= IFM_100_TX;
316			break;
317		case PC_LinkSpeed_1000:
318			mii->mii_media_active |= IFM_1000_T;
319			break;
320		default:
321			mii->mii_media_active |= IFM_NONE;
322			return;
323		}
324		if ((stat & PC_PhyDuplexStatus) != 0)
325			mii->mii_media_active |= IFM_FDX;
326		else
327			mii->mii_media_active |= IFM_HDX;
328	}
329
330	if ((mii->mii_media_active & IFM_FDX) != 0)
331		mii->mii_media_active |= mii_phy_flowstatus(sc);
332
333	if ((mii->mii_media_active & IFM_1000_T) != 0) {
334		stat = PHY_READ(sc, IP1000PHY_MII_1000SR);
335		if ((stat & IP1000PHY_1000SR_MASTER) != 0)
336			mii->mii_media_active |= IFM_ETH_MASTER;
337	}
338}
339
340static int
341ip1000phy_mii_phy_auto(struct mii_softc *sc, int media)
342{
343	struct ip1000phy_softc *isc;
344	uint32_t reg;
345
346	isc = (struct ip1000phy_softc *)sc;
347	reg = 0;
348	if (isc->model == MII_MODEL_ICPLUS_IP1001) {
349		reg = PHY_READ(sc, IP1000PHY_MII_ANAR);
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