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brgphy.c revision 1.35
      1 /*	$NetBSD: brgphy.c,v 1.35 2007/12/09 20:28:02 jmcneill Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
      9  * NASA Ames Research Center.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *	This product includes software developed by the NetBSD
     22  *	Foundation, Inc. and its contributors.
     23  * 4. Neither the name of The NetBSD Foundation nor the names of its
     24  *    contributors may be used to endorse or promote products derived
     25  *    from this software without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     37  * POSSIBILITY OF SUCH DAMAGE.
     38  */
     39 
     40 /*
     41  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
     42  *
     43  * Redistribution and use in source and binary forms, with or without
     44  * modification, are permitted provided that the following conditions
     45  * are met:
     46  * 1. Redistributions of source code must retain the above copyright
     47  *    notice, this list of conditions and the following disclaimer.
     48  * 2. Redistributions in binary form must reproduce the above copyright
     49  *    notice, this list of conditions and the following disclaimer in the
     50  *    documentation and/or other materials provided with the distribution.
     51  * 3. All advertising materials mentioning features or use of this software
     52  *    must display the following acknowledgement:
     53  *	This product includes software developed by Manuel Bouyer.
     54  * 4. The name of the author may not be used to endorse or promote products
     55  *    derived from this software without specific prior written permission.
     56  *
     57  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     58  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     59  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     60  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     61  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     62  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     63  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     64  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     65  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     66  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     67  */
     68 
     69 /*
     70  * driver for the Broadcom BCM5400 Gig-E PHY.
     71  *
     72  * Programming information for this PHY was gleaned from FreeBSD
     73  * (they were apparently able to get a datasheet from Broadcom).
     74  */
     75 
     76 #include <sys/cdefs.h>
     77 __KERNEL_RCSID(0, "$NetBSD: brgphy.c,v 1.35 2007/12/09 20:28:02 jmcneill Exp $");
     78 
     79 #include <sys/param.h>
     80 #include <sys/systm.h>
     81 #include <sys/kernel.h>
     82 #include <sys/device.h>
     83 #include <sys/socket.h>
     84 #include <sys/errno.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 <dev/mii/miidevs.h>
     92 
     93 #include <dev/mii/brgphyreg.h>
     94 
     95 static int	brgphymatch(struct device *, struct cfdata *, void *);
     96 static void	brgphyattach(struct device *, struct device *, void *);
     97 
     98 CFATTACH_DECL(brgphy, sizeof(struct mii_softc),
     99     brgphymatch, brgphyattach, mii_phy_detach, mii_phy_activate);
    100 
    101 static int	brgphy_service(struct mii_softc *, struct mii_data *, int);
    102 static void	brgphy_status(struct mii_softc *);
    103 static int	brgphy_mii_phy_auto(struct mii_softc *);
    104 static void	brgphy_loop(struct mii_softc *);
    105 
    106 static void	brgphy_5401_reset(struct mii_softc *);
    107 static void	brgphy_5411_reset(struct mii_softc *);
    108 static void	brgphy_5703_reset(struct mii_softc *);
    109 static void	brgphy_5704_reset(struct mii_softc *);
    110 static void	brgphy_5705_reset(struct mii_softc *);
    111 static void	brgphy_5750_reset(struct mii_softc *);
    112 static void	brgphy_5755_reset(struct mii_softc *);
    113 
    114 static const struct mii_phy_funcs brgphy_funcs = {
    115 	brgphy_service, brgphy_status, mii_phy_reset,
    116 };
    117 
    118 static const struct mii_phy_funcs brgphy_5401_funcs = {
    119 	brgphy_service, brgphy_status, brgphy_5401_reset,
    120 };
    121 
    122 static const struct mii_phy_funcs brgphy_5411_funcs = {
    123 	brgphy_service, brgphy_status, brgphy_5411_reset,
    124 };
    125 
    126 static const struct mii_phy_funcs brgphy_5703_funcs = {
    127 	brgphy_service, brgphy_status, brgphy_5703_reset,
    128 };
    129 
    130 static const struct mii_phy_funcs brgphy_5704_funcs = {
    131 	brgphy_service, brgphy_status, brgphy_5704_reset,
    132 };
    133 
    134 static const struct mii_phy_funcs brgphy_5705_funcs = {
    135 	brgphy_service, brgphy_status, brgphy_5705_reset,
    136 };
    137 
    138 const struct mii_phy_funcs brgphy_5750_funcs = {
    139 	brgphy_service, brgphy_status, brgphy_5750_reset,
    140 };
    141 
    142 const struct mii_phy_funcs brgphy_5755_funcs = {
    143 	brgphy_service, brgphy_status, brgphy_5755_reset,
    144 };
    145 
    146 
    147 static const struct mii_phydesc brgphys[] = {
    148 	{ MII_OUI_BROADCOM,		MII_MODEL_BROADCOM_BCM5400,
    149 	  MII_STR_BROADCOM_BCM5400 },
    150 
    151 	{ MII_OUI_BROADCOM,		MII_MODEL_BROADCOM_BCM5401,
    152 	  MII_STR_BROADCOM_BCM5401 },
    153 
    154 	{ MII_OUI_BROADCOM,		MII_MODEL_BROADCOM_BCM5411,
    155 	  MII_STR_BROADCOM_BCM5411 },
    156 
    157 	{ MII_OUI_BROADCOM,		MII_MODEL_BROADCOM_BCM5421,
    158 	  MII_STR_BROADCOM_BCM5421 },
    159 
    160 	{ MII_OUI_BROADCOM,		MII_MODEL_BROADCOM_BCM5701,
    161 	  MII_STR_BROADCOM_BCM5701 },
    162 
    163 	{ MII_OUI_BROADCOM,		MII_MODEL_BROADCOM_BCM5703,
    164 	  MII_STR_BROADCOM_BCM5703 },
    165 
    166 	{ MII_OUI_BROADCOM,		MII_MODEL_BROADCOM_BCM5704,
    167 	  MII_STR_BROADCOM_BCM5704 },
    168 
    169 	{ MII_OUI_BROADCOM,		MII_MODEL_BROADCOM_BCM5705,
    170 	  MII_STR_BROADCOM_BCM5705 },
    171 
    172 	{ MII_OUI_BROADCOM,		MII_MODEL_BROADCOM_BCM5714,
    173 	  MII_STR_BROADCOM_BCM5714 },
    174 
    175 	{ MII_OUI_BROADCOM,		MII_MODEL_BROADCOM_BCM5750,
    176 	  MII_STR_BROADCOM_BCM5750 },
    177 
    178 	{ MII_OUI_BROADCOM,		MII_MODEL_BROADCOM_BCM5752,
    179 	  MII_STR_BROADCOM_BCM5752 },
    180 
    181 	{ MII_OUI_BROADCOM,		MII_MODEL_BROADCOM_BCM5780,
    182 	  MII_STR_BROADCOM_BCM5780 },
    183 
    184 	{ MII_OUI_BROADCOM2,		MII_MODEL_BROADCOM2_BCM5755,
    185 	  MII_STR_BROADCOM2_BCM5755 },
    186 
    187 	{ MII_OUI_BROADCOM2,		MII_MODEL_BROADCOM2_BCM5754,
    188 	  MII_STR_BROADCOM2_BCM5754 },
    189 
    190 	{ 0,				0,
    191 	  NULL },
    192 };
    193 
    194 static void bcm5401_load_dspcode(struct mii_softc *);
    195 static void bcm5411_load_dspcode(struct mii_softc *);
    196 static void bcm5703_load_dspcode(struct mii_softc *);
    197 static void bcm5704_load_dspcode(struct mii_softc *);
    198 static void bcm5750_load_dspcode(struct mii_softc *);
    199 static void bcm5755_load_dspcode(struct mii_softc *);
    200 
    201 static int
    202 brgphymatch(struct device *parent, struct cfdata *match,
    203     void *aux)
    204 {
    205 	struct mii_attach_args *ma = aux;
    206 
    207 	if (mii_phy_match(ma, brgphys) != NULL)
    208 		return (10);
    209 
    210 	return (0);
    211 }
    212 
    213 static void
    214 brgphyattach(struct device *parent, struct device *self, void *aux)
    215 {
    216 	struct mii_softc *sc = device_private(self);
    217 	struct mii_attach_args *ma = aux;
    218 	struct mii_data *mii = ma->mii_data;
    219 	const struct mii_phydesc *mpd;
    220 
    221 	mpd = mii_phy_match(ma, brgphys);
    222 	aprint_naive(": Media interface\n");
    223 	aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
    224 
    225 	sc->mii_inst = mii->mii_instance;
    226 	sc->mii_phy = ma->mii_phyno;
    227 	sc->mii_mpd_model = MII_MODEL(ma->mii_id2);
    228 	sc->mii_pdata = mii;
    229 	sc->mii_flags = ma->mii_flags;
    230 	sc->mii_anegticks = MII_ANEGTICKS;
    231 
    232 	switch (MII_MODEL(ma->mii_id2)) {
    233 	case MII_MODEL_BROADCOM_BCM5400:
    234 		sc->mii_funcs = &brgphy_5401_funcs;
    235 		aprint_normal("%s: using BCM5401 DSP patch\n",
    236 		    sc->mii_dev.dv_xname);
    237 		break;
    238 
    239 	case MII_MODEL_BROADCOM_BCM5401:
    240 		if (MII_REV(ma->mii_id2) == 1 || MII_REV(ma->mii_id2) == 3) {
    241 			sc->mii_funcs = &brgphy_5401_funcs;
    242 			aprint_normal("%s: using BCM5401 DSP patch\n",
    243 			    sc->mii_dev.dv_xname);
    244 		} else
    245 			sc->mii_funcs = &brgphy_funcs;
    246 		break;
    247 
    248 	case MII_MODEL_BROADCOM_BCM5411:
    249 		sc->mii_funcs = &brgphy_5411_funcs;
    250 		aprint_normal("%s: using BCM5411 DSP patch\n",
    251 		    sc->mii_dev.dv_xname);
    252 		break;
    253 
    254 #ifdef notyet /* unverified, untested */
    255 	case MII_MODEL_BROADCOM_BCM5703:
    256 		sc->mii_funcs = &brgphy_5703_funcs;
    257 		aprint_normal("%s: using BCM5703 DSP patch\n",
    258 		    sc->mii_dev.dv_xname);
    259 		break;
    260 #endif
    261 
    262 	case MII_MODEL_BROADCOM_BCM5704:
    263 		sc->mii_funcs = &brgphy_5704_funcs;
    264 		aprint_normal("%s: using BCM5704 DSP patch\n",
    265 		    sc->mii_dev.dv_xname);
    266 		break;
    267 
    268 	case MII_MODEL_BROADCOM_BCM5705:
    269 		sc->mii_funcs = &brgphy_5705_funcs;
    270 		break;
    271 
    272 	case MII_MODEL_BROADCOM_BCM5714:
    273 	case MII_MODEL_BROADCOM_BCM5780:
    274 	case MII_MODEL_BROADCOM_BCM5750:
    275 	case MII_MODEL_BROADCOM_BCM5752:
    276 		sc->mii_funcs = &brgphy_5750_funcs;
    277 		break;
    278 
    279 	case MII_MODEL_BROADCOM2_BCM5754:
    280 	case MII_MODEL_BROADCOM2_BCM5755:
    281 		sc->mii_funcs = &brgphy_5755_funcs;
    282 		break;
    283 
    284 	default:
    285 		sc->mii_funcs = &brgphy_funcs;
    286 		break;
    287 	}
    288 
    289 	PHY_RESET(sc);
    290 
    291 	sc->mii_capabilities =
    292 	    PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
    293 	if (sc->mii_capabilities & BMSR_EXTSTAT)
    294 		sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
    295 
    296 	aprint_normal("%s: ", sc->mii_dev.dv_xname);
    297 	if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0 &&
    298 	    (sc->mii_extcapabilities & EXTSR_MEDIAMASK) == 0)
    299 		aprint_error("no media present");
    300 	else
    301 		mii_phy_add_media(sc);
    302 	aprint_normal("\n");
    303 
    304 	if (!pmf_device_register(self, NULL, mii_phy_resume))
    305 		aprint_error_dev(self, "couldn't establish power handler\n");
    306 }
    307 
    308 static int
    309 brgphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
    310 {
    311 	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
    312 	int reg, speed, gig;
    313 
    314 	switch (cmd) {
    315 	case MII_POLLSTAT:
    316 		/*
    317 		 * If we're not polling our PHY instance, just return.
    318 		 */
    319 		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
    320 			return (0);
    321 		break;
    322 
    323 	case MII_MEDIACHG:
    324 		/*
    325 		 * If the media indicates a different PHY instance,
    326 		 * isolate ourselves.
    327 		 */
    328 		if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
    329 			reg = PHY_READ(sc, MII_BMCR);
    330 			PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
    331 			return (0);
    332 		}
    333 
    334 		/*
    335 		 * If the interface is not up, don't do anything.
    336 		 */
    337 		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
    338 			break;
    339 
    340 		PHY_RESET(sc); /* XXX hardware bug work-around */
    341 
    342 		switch (IFM_SUBTYPE(ife->ifm_media)) {
    343 		case IFM_AUTO:
    344 			(void) brgphy_mii_phy_auto(sc);
    345 			break;
    346 		case IFM_1000_T:
    347 			speed = BMCR_S1000;
    348 			goto setit;
    349 		case IFM_100_TX:
    350 			speed = BMCR_S100;
    351 			goto setit;
    352 		case IFM_10_T:
    353 			speed = BMCR_S10;
    354 setit:
    355 			brgphy_loop(sc);
    356 			if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
    357 				speed |= BMCR_FDX;
    358 				gig = GTCR_ADV_1000TFDX;
    359 			} else {
    360 				gig = GTCR_ADV_1000THDX;
    361 			}
    362 
    363 			PHY_WRITE(sc, MII_100T2CR, 0);
    364 			PHY_WRITE(sc, MII_BMCR, speed);
    365 			PHY_WRITE(sc, MII_ANAR, ANAR_CSMA);
    366 
    367 			if (IFM_SUBTYPE(ife->ifm_media) != IFM_1000_T)
    368 				break;
    369 
    370 			PHY_WRITE(sc, MII_100T2CR, gig);
    371 			PHY_WRITE(sc, MII_BMCR,
    372 			    speed|BMCR_AUTOEN|BMCR_STARTNEG);
    373 
    374 			if (sc->mii_mpd_model != MII_MODEL_BROADCOM_BCM5701)
    375 				break;
    376 
    377 			if (mii->mii_media.ifm_media & IFM_ETH_MASTER)
    378 				gig |= GTCR_MAN_MS | GTCR_ADV_MS;
    379 			PHY_WRITE(sc, MII_100T2CR, gig);
    380 			break;
    381 		default:
    382 			return (EINVAL);
    383 		}
    384 		break;
    385 
    386 	case MII_TICK:
    387 		/*
    388 		 * If we're not currently selected, just return.
    389 		 */
    390 		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
    391 			return (0);
    392 
    393 		if (mii_phy_tick(sc) == EJUSTRETURN)
    394 			return (0);
    395 		break;
    396 
    397 	case MII_DOWN:
    398 		mii_phy_down(sc);
    399 		return (0);
    400 	}
    401 
    402 	/* Update the media status. */
    403 	mii_phy_status(sc);
    404 
    405 	/*
    406 	 * Callback if something changed. Note that we need to poke the DSP on
    407 	 * the Broadcom PHYs if the media changes.
    408 	 */
    409 	if (sc->mii_media_active != mii->mii_media_active ||
    410 	    sc->mii_media_status != mii->mii_media_status ||
    411 	    cmd == MII_MEDIACHG) {
    412 		mii_phy_update(sc, cmd);
    413 		if (sc->mii_funcs == &brgphy_5401_funcs)
    414 			bcm5401_load_dspcode(sc);
    415 		else if (sc->mii_funcs == &brgphy_5411_funcs)
    416 			bcm5411_load_dspcode(sc);
    417 	}
    418 	return (0);
    419 }
    420 
    421 static void
    422 brgphy_status(struct mii_softc *sc)
    423 {
    424 	struct mii_data *mii = sc->mii_pdata;
    425 	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
    426 	int bmcr, auxsts, gtsr;
    427 
    428 	mii->mii_media_status = IFM_AVALID;
    429 	mii->mii_media_active = IFM_ETHER;
    430 
    431 	auxsts = PHY_READ(sc, BRGPHY_MII_AUXSTS);
    432 
    433 	if (auxsts & BRGPHY_AUXSTS_LINK)
    434 		mii->mii_media_status |= IFM_ACTIVE;
    435 
    436 	bmcr = PHY_READ(sc, MII_BMCR);
    437 	if (bmcr & BMCR_ISO) {
    438 		mii->mii_media_active |= IFM_NONE;
    439 		mii->mii_media_status = 0;
    440 		return;
    441 	}
    442 
    443 	if (bmcr & BMCR_LOOP)
    444 		mii->mii_media_active |= IFM_LOOP;
    445 
    446 	if (bmcr & BMCR_AUTOEN) {
    447 		/*
    448 		 * The media status bits are only valid of autonegotiation
    449 		 * has completed (or it's disabled).
    450 		 */
    451 		if ((auxsts & BRGPHY_AUXSTS_ACOMP) == 0) {
    452 			/* Erg, still trying, I guess... */
    453 			mii->mii_media_active |= IFM_NONE;
    454 			return;
    455 		}
    456 
    457 		switch (auxsts & BRGPHY_AUXSTS_AN_RES) {
    458 		case BRGPHY_RES_1000FD:
    459 			mii->mii_media_active |= IFM_1000_T|IFM_FDX;
    460 			gtsr = PHY_READ(sc, MII_100T2SR);
    461 			if (gtsr & GTSR_MS_RES)
    462 				mii->mii_media_active |= IFM_ETH_MASTER;
    463 			break;
    464 
    465 		case BRGPHY_RES_1000HD:
    466 			mii->mii_media_active |= IFM_1000_T;
    467 			gtsr = PHY_READ(sc, MII_100T2SR);
    468 			if (gtsr & GTSR_MS_RES)
    469 				mii->mii_media_active |= IFM_ETH_MASTER;
    470 			break;
    471 
    472 		case BRGPHY_RES_100FD:
    473 			mii->mii_media_active |= IFM_100_TX|IFM_FDX;
    474 			break;
    475 
    476 		case BRGPHY_RES_100T4:
    477 			mii->mii_media_active |= IFM_100_T4;
    478 			break;
    479 
    480 		case BRGPHY_RES_100HD:
    481 			mii->mii_media_active |= IFM_100_TX;
    482 			break;
    483 
    484 		case BRGPHY_RES_10FD:
    485 			mii->mii_media_active |= IFM_10_T|IFM_FDX;
    486 			break;
    487 
    488 		case BRGPHY_RES_10HD:
    489 			mii->mii_media_active |= IFM_10_T;
    490 			break;
    491 
    492 		default:
    493 			mii->mii_media_active |= IFM_NONE;
    494 			mii->mii_media_status = 0;
    495 		}
    496 		if (mii->mii_media_active & IFM_FDX)
    497 			mii->mii_media_active |= mii_phy_flowstatus(sc);
    498 	} else
    499 		mii->mii_media_active = ife->ifm_media;
    500 }
    501 
    502 int
    503 brgphy_mii_phy_auto(struct mii_softc *sc)
    504 {
    505 	int anar, ktcr = 0;
    506 
    507 	brgphy_loop(sc);
    508 	PHY_RESET(sc);
    509 	ktcr = GTCR_ADV_1000TFDX|GTCR_ADV_1000THDX;
    510 	if (sc->mii_mpd_model == MII_MODEL_BROADCOM_BCM5701)
    511 		ktcr |= GTCR_MAN_MS|GTCR_ADV_MS;
    512 	PHY_WRITE(sc, MII_100T2CR, ktcr);
    513 	ktcr = PHY_READ(sc, MII_100T2CR);
    514 	DELAY(1000);
    515 	anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA;
    516 	if (sc->mii_flags & MIIF_DOPAUSE)
    517 		anar |= ANAR_FC| ANAR_X_PAUSE_ASYM;
    518 
    519 	PHY_WRITE(sc, MII_ANAR, anar);
    520 	DELAY(1000);
    521 	PHY_WRITE(sc, MII_BMCR,
    522 	    BMCR_AUTOEN | BMCR_STARTNEG);
    523 	PHY_WRITE(sc, BRGPHY_MII_IMR, 0xFF00);
    524 
    525 	return (EJUSTRETURN);
    526 }
    527 
    528 void
    529 brgphy_loop(struct mii_softc *sc)
    530 {
    531 	u_int32_t bmsr;
    532 	int i;
    533 
    534 	PHY_WRITE(sc, MII_BMCR, BMCR_LOOP);
    535 	for (i = 0; i < 15000; i++) {
    536 		bmsr = PHY_READ(sc, MII_BMSR);
    537 		if (!(bmsr & BMSR_LINK))
    538 			break;
    539 		DELAY(10);
    540 	}
    541 }
    542 
    543 static void
    544 brgphy_5401_reset(struct mii_softc *sc)
    545 {
    546 
    547 	mii_phy_reset(sc);
    548 	bcm5401_load_dspcode(sc);
    549 }
    550 
    551 static void
    552 brgphy_5411_reset(struct mii_softc *sc)
    553 {
    554 
    555 	mii_phy_reset(sc);
    556 	bcm5411_load_dspcode(sc);
    557 }
    558 
    559 
    560 static void
    561 brgphy_5703_reset(struct mii_softc *sc)
    562 {
    563 
    564 	mii_phy_reset(sc);
    565 	bcm5703_load_dspcode(sc);
    566 }
    567 
    568 static void
    569 brgphy_5704_reset(struct mii_softc *sc)
    570 {
    571 
    572 	mii_phy_reset(sc);
    573 	bcm5704_load_dspcode(sc);
    574 }
    575 
    576 /*
    577  * Hardware bug workaround.  Do nothing since after
    578  * reset the 5705 PHY would get stuck in 10/100 MII mode.
    579  */
    580 
    581 static void
    582 brgphy_5705_reset(struct mii_softc *sc)
    583 {
    584 }
    585 
    586 static void
    587 brgphy_5750_reset(struct mii_softc *sc)
    588 {
    589 	mii_phy_reset(sc);
    590 	bcm5750_load_dspcode(sc);
    591 }
    592 
    593 static void
    594 brgphy_5755_reset(struct mii_softc *sc)
    595 {
    596 	mii_phy_reset(sc);
    597 	bcm5755_load_dspcode(sc);
    598 }
    599 
    600 /* Turn off tap power management on 5401. */
    601 static void
    602 bcm5401_load_dspcode(struct mii_softc *sc)
    603 {
    604 	static const struct {
    605 		int		reg;
    606 		uint16_t	val;
    607 	} dspcode[] = {
    608 		{ BRGPHY_MII_AUXCTL,		0x0c20 },
    609 		{ BRGPHY_MII_DSP_ADDR_REG,	0x0012 },
    610 		{ BRGPHY_MII_DSP_RW_PORT,	0x1804 },
    611 		{ BRGPHY_MII_DSP_ADDR_REG,	0x0013 },
    612 		{ BRGPHY_MII_DSP_RW_PORT,	0x1204 },
    613 		{ BRGPHY_MII_DSP_ADDR_REG,	0x8006 },
    614 		{ BRGPHY_MII_DSP_RW_PORT,	0x0132 },
    615 		{ BRGPHY_MII_DSP_ADDR_REG,	0x8006 },
    616 		{ BRGPHY_MII_DSP_RW_PORT,	0x0232 },
    617 		{ BRGPHY_MII_DSP_ADDR_REG,	0x201f },
    618 		{ BRGPHY_MII_DSP_RW_PORT,	0x0a20 },
    619 		{ 0,				0 },
    620 	};
    621 	int i;
    622 
    623 	for (i = 0; dspcode[i].reg != 0; i++)
    624 		PHY_WRITE(sc, dspcode[i].reg, dspcode[i].val);
    625     delay(40);
    626 }
    627 
    628 static void
    629 bcm5411_load_dspcode(struct mii_softc *sc)
    630 {
    631 	static const struct {
    632 		int		reg;
    633 		uint16_t	val;
    634 	} dspcode[] = {
    635 		{ 0x1c,				0x8c23 },
    636 		{ 0x1c,				0x8ca3 },
    637 		{ 0x1c,				0x8c23 },
    638 		{ 0,				0 },
    639 	};
    640 	int i;
    641 
    642 	for (i = 0; dspcode[i].reg != 0; i++)
    643 		PHY_WRITE(sc, dspcode[i].reg, dspcode[i].val);
    644 }
    645 
    646 static void
    647 bcm5703_load_dspcode(struct mii_softc *sc)
    648 {
    649 	static const struct {
    650 		int		reg;
    651 		uint16_t	val;
    652 	} dspcode[] = {
    653 		{ BRGPHY_MII_AUXCTL,		0x0c00 },
    654 		{ BRGPHY_MII_DSP_ADDR_REG,	0x201f },
    655 		{ BRGPHY_MII_DSP_RW_PORT,	0x2aaa },
    656 		{ 0,				0 },
    657 	};
    658 	int i;
    659 
    660 	for (i = 0; dspcode[i].reg != 0; i++)
    661 		PHY_WRITE(sc, dspcode[i].reg, dspcode[i].val);
    662 }
    663 
    664 static void
    665 bcm5704_load_dspcode(struct mii_softc *sc)
    666 {
    667 	static const struct {
    668 		int		reg;
    669 		uint16_t	val;
    670 	} dspcode[] = {
    671 		{ 0x1c,				0x8d68 },
    672 		{ 0x1c,				0x8d68 },
    673 		{ 0,				0 },
    674 	};
    675 	int i;
    676 
    677 	for (i = 0; dspcode[i].reg != 0; i++)
    678 		PHY_WRITE(sc, dspcode[i].reg, dspcode[i].val);
    679 }
    680 
    681 static void
    682 bcm5750_load_dspcode(struct mii_softc *sc)
    683 {
    684 	static const struct {
    685 		int		reg;
    686 		uint16_t	val;
    687 	} dspcode[] = {
    688 		{ BRGPHY_MII_AUXCTL,		0x0c00 },
    689 		{ BRGPHY_MII_DSP_ADDR_REG,	0x000a },
    690 		{ BRGPHY_MII_DSP_RW_PORT,	0x310b },
    691 		{ BRGPHY_MII_DSP_ADDR_REG,	0x201f },
    692 		{ BRGPHY_MII_DSP_RW_PORT,	0x9506 },
    693 		{ BRGPHY_MII_DSP_ADDR_REG,	0x401f },
    694 		{ BRGPHY_MII_DSP_RW_PORT,	0x14e2 },
    695 		{ BRGPHY_MII_AUXCTL,		0x0400 },
    696 		{ 0,				0 },
    697 	};
    698 	int i;
    699 
    700 	for (i = 0; dspcode[i].reg != 0; i++)
    701 		PHY_WRITE(sc, dspcode[i].reg, dspcode[i].val);
    702 }
    703 
    704 static void
    705 bcm5755_load_dspcode(struct mii_softc *sc)
    706 {
    707 	static const struct {
    708 		int		reg;
    709 		uint16_t	val;
    710 	} dspcode[] = {
    711 		{ BRGPHY_MII_AUXCTL,		0x0c00 },
    712 		{ BRGPHY_MII_DSP_ADDR_REG,	0x000a },
    713 		{ BRGPHY_MII_DSP_RW_PORT,	0x010b },
    714 
    715 		{ BRGPHY_MII_AUXCTL,		0x0400 },
    716 		{ 0,				0 },
    717 	};
    718 	int i;
    719 
    720 	for (i = 0; dspcode[i].reg != 0; i++)
    721 		PHY_WRITE(sc, dspcode[i].reg, dspcode[i].val);
    722 }
    723