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inphy.c revision 1.6
      1 /*	$NetBSD: inphy.c,v 1.6 1998/11/04 23:07:15 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998 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 Intel's i82555 ethernet 10/100 PHY
     71  * Data Sheet available from www.intel.com
     72  */
     73 
     74 #include <sys/param.h>
     75 #include <sys/systm.h>
     76 #include <sys/kernel.h>
     77 #include <sys/device.h>
     78 #include <sys/malloc.h>
     79 #include <sys/socket.h>
     80 
     81 #include <net/if.h>
     82 #include <net/if_media.h>
     83 
     84 #include <dev/mii/mii.h>
     85 #include <dev/mii/miivar.h>
     86 #include <dev/mii/miidevs.h>
     87 
     88 #include <dev/mii/inphyreg.h>
     89 
     90 struct inphy_softc {
     91 	struct mii_softc sc_mii;		/* generic PHY */
     92 	int sc_ticks;
     93 	int sc_active;
     94 };
     95 
     96 int	inphymatch __P((struct device *, struct cfdata *, void *));
     97 void	inphyattach __P((struct device *, struct device *, void *));
     98 
     99 struct cfattach inphy_ca = {
    100 	sizeof(struct inphy_softc), inphymatch, inphyattach
    101 };
    102 
    103 int	inphy_service __P((struct mii_softc *, struct mii_data *, int));
    104 void	inphy_reset __P((struct inphy_softc *));
    105 void	inphy_status __P((struct inphy_softc *));
    106 
    107 int
    108 inphymatch(parent, match, aux)
    109 	struct device *parent;
    110 	struct cfdata *match;
    111 	void *aux;
    112 {
    113 	struct mii_attach_args *ma = aux;
    114 
    115 	if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_INTEL &&
    116 	    MII_MODEL(ma->mii_id2) == MII_MODEL_INTEL_I82555)
    117 		return (1);
    118 
    119 	return (0);
    120 }
    121 
    122 void
    123 inphyattach(parent, self, aux)
    124 	struct device *parent, *self;
    125 	void *aux;
    126 {
    127 	struct inphy_softc *sc = (struct inphy_softc *)self;
    128 	struct mii_attach_args *ma = aux;
    129 	struct mii_data *mii = ma->mii_data;
    130 
    131 	printf(": %s, rev. %d\n", MII_STR_INTEL_I82555,
    132 	    MII_REV(ma->mii_id2));
    133 
    134 	sc->sc_mii.mii_inst = mii->mii_instance;
    135 	sc->sc_mii.mii_phy = ma->mii_phyno;
    136 	sc->sc_mii.mii_service = inphy_service;
    137 	sc->sc_mii.mii_pdata = mii;
    138 
    139 #define	ADD(m, c)	ifmedia_add(&mii->mii_media, (m), (c), NULL)
    140 
    141 #if 0
    142 	/* Can't do this on the i82557! */
    143 	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->sc_mii.mii_inst),
    144 	    BMCR_ISO);
    145 #endif
    146 	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->sc_mii.mii_inst),
    147 	    BMCR_LOOP|BMCR_S100);
    148 
    149 	inphy_reset(sc);
    150 
    151 	sc->sc_mii.mii_capabilities =
    152 	    PHY_READ(&sc->sc_mii, MII_BMSR) & ma->mii_capmask;
    153 	printf("%s: ", sc->sc_mii.mii_dev.dv_xname);
    154 	if ((sc->sc_mii.mii_capabilities & BMSR_MEDIAMASK) == 0)
    155 		printf("no media present");
    156 	else
    157 		mii_add_media(mii, sc->sc_mii.mii_capabilities,
    158 		    sc->sc_mii.mii_inst);
    159 	printf("\n");
    160 #undef ADD
    161 }
    162 
    163 int
    164 inphy_service(self, mii, cmd)
    165 	struct mii_softc *self;
    166 	struct mii_data *mii;
    167 	int cmd;
    168 {
    169 	struct inphy_softc *sc = (struct inphy_softc *)self;
    170 	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
    171 	int reg;
    172 
    173 	switch (cmd) {
    174 	case MII_POLLSTAT:
    175 		/*
    176 		 * If we're not polling our PHY instance, just return.
    177 		 */
    178 		if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst)
    179 			return (0);
    180 		break;
    181 
    182 	case MII_MEDIACHG:
    183 		/*
    184 		 * If the media indicates a different PHY instance,
    185 		 * isolate ourselves.
    186 		 */
    187 		if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) {
    188 			reg = PHY_READ(&sc->sc_mii, MII_BMCR);
    189 			PHY_WRITE(&sc->sc_mii, MII_BMCR, reg | BMCR_ISO);
    190 			return (0);
    191 		}
    192 
    193 		/*
    194 		 * If the interface is not up, don't do anything.
    195 		 */
    196 		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
    197 			break;
    198 
    199 		switch (IFM_SUBTYPE(ife->ifm_media)) {
    200 		case IFM_AUTO:
    201 			/*
    202 			 * If we're already in auto mode, just return.
    203 			 */
    204 			if (PHY_READ(&sc->sc_mii, MII_BMCR) & BMCR_AUTOEN)
    205 				return (0);
    206 			(void) mii_phy_auto(&sc->sc_mii);
    207 			break;
    208 		case IFM_100_T4:
    209 			/*
    210 			 * XXX Not supported as a manual setting right now.
    211 			 */
    212 			return (EINVAL);
    213 		default:
    214 			/*
    215 			 * BMCR data is stored in the ifmedia entry.
    216 			 */
    217 			PHY_WRITE(&sc->sc_mii, MII_ANAR,
    218 			    mii_anar(ife->ifm_media));
    219 			PHY_WRITE(&sc->sc_mii, MII_BMCR, ife->ifm_data);
    220 		}
    221 		break;
    222 
    223 	case MII_TICK:
    224 		/*
    225 		 * If we're not currently selected, just return.
    226 		 */
    227 		if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst)
    228 			return (0);
    229 
    230 		/*
    231 		 * Only used for autonegotiation.
    232 		 */
    233 		if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
    234 			return (0);
    235 
    236 		/*
    237 		 * Is the interface even up?
    238 		 */
    239 		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
    240 			return (0);
    241 
    242 		/*
    243 		 * Check to see if we have link.  If we do, we don't
    244 		 * need to restart the autonegotiation process.  Read
    245 		 * the BMSR twice in case it's latched.
    246 		 */
    247 		reg = PHY_READ(&sc->sc_mii, MII_BMSR) |
    248 		    PHY_READ(&sc->sc_mii, MII_BMSR);
    249 		if (reg & BMSR_LINK)
    250 			return (0);
    251 
    252 		/*
    253 		 * Only retry autonegotiation every 5 seconds.
    254 		 */
    255 		if (++sc->sc_ticks != 5)
    256 			return (0);
    257 
    258 		sc->sc_ticks = 0;
    259 		inphy_reset(sc);
    260 		(void) mii_phy_auto(&sc->sc_mii);
    261 		break;
    262 	}
    263 
    264 	/* Update the media status. */
    265 	inphy_status(sc);
    266 
    267 	/* Callback if something changed. */
    268 	if (sc->sc_active != mii->mii_media_active || cmd == MII_MEDIACHG) {
    269 		(*mii->mii_statchg)(sc->sc_mii.mii_dev.dv_parent);
    270 		sc->sc_active = mii->mii_media_active;
    271 	}
    272 	return (0);
    273 }
    274 
    275 void
    276 inphy_status(sc)
    277 	struct inphy_softc *sc;
    278 {
    279 	struct mii_data *mii = sc->sc_mii.mii_pdata;
    280 	int bmsr, bmcr, scr;
    281 
    282 	mii->mii_media_status = IFM_AVALID;
    283 	mii->mii_media_active = IFM_ETHER;
    284 
    285 	bmsr = PHY_READ(&sc->sc_mii, MII_BMSR) |
    286 	    PHY_READ(&sc->sc_mii, MII_BMSR);
    287 	if (bmsr & BMSR_LINK)
    288 		mii->mii_media_status |= IFM_ACTIVE;
    289 
    290 	bmcr = PHY_READ(&sc->sc_mii, MII_BMCR);
    291 	if (bmcr & BMCR_ISO) {
    292 		mii->mii_media_active |= IFM_NONE;
    293 		mii->mii_media_status = 0;
    294 		return;
    295 	}
    296 
    297 	if (bmcr & BMCR_LOOP)
    298 		mii->mii_media_active |= IFM_LOOP;
    299 
    300 	if (bmcr & BMCR_AUTOEN) {
    301 		if ((bmsr & BMSR_ACOMP) == 0) {
    302 			/* Erg, still trying, I guess... */
    303 			mii->mii_media_active |= IFM_NONE;
    304 			return;
    305 		}
    306 		scr = PHY_READ(&sc->sc_mii, MII_INPHY_SCR);
    307 		if (scr & SCR_T4)
    308 			mii->mii_media_active |= IFM_100_T4;
    309 		else if (scr & SCR_S100)
    310 			mii->mii_media_active |= IFM_100_TX;
    311 		else
    312 			mii->mii_media_active |= IFM_10_T;
    313 		if (scr & SCR_FDX)
    314 			mii->mii_media_active |= IFM_FDX;
    315 	} else {
    316 		if (bmcr & BMCR_S100)
    317 			mii->mii_media_active |= IFM_100_TX;
    318 		else
    319 			mii->mii_media_active |= IFM_10_T;
    320 		if (bmcr & BMCR_FDX)
    321 			mii->mii_media_active |= IFM_FDX;
    322 	}
    323 }
    324 
    325 void
    326 inphy_reset(sc)
    327 	struct inphy_softc *sc;
    328 {
    329 	int reg, i;
    330 
    331 	/*
    332 	 * The i82557 wedges if we isolate all of its PHYs!
    333 	 */
    334 	if (sc->sc_mii.mii_inst == 0)
    335 		PHY_WRITE(&sc->sc_mii, MII_BMCR, BMCR_RESET);
    336 	else
    337 		PHY_WRITE(&sc->sc_mii, MII_BMCR, BMCR_RESET|BMCR_ISO);
    338 
    339 	/* Wait 100ms for it to complete. */
    340 	for (i = 0; i < 100; i++) {
    341 		reg = PHY_READ(&sc->sc_mii, MII_BMCR);
    342 		if ((reg & BMCR_RESET) == 0)
    343 			break;
    344 		delay(1000);
    345 	}
    346 
    347 	/* Make sure the PHY is isolated. */
    348 	if (sc->sc_mii.mii_inst != 0)
    349 		PHY_WRITE(&sc->sc_mii, MII_BMCR, reg | BMCR_ISO);
    350 }
    351