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inphy.c revision 1.7
      1 /*	$NetBSD: inphy.c,v 1.7 1998/11/04 23:28:15 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_status __P((struct inphy_softc *));
    105 
    106 int
    107 inphymatch(parent, match, aux)
    108 	struct device *parent;
    109 	struct cfdata *match;
    110 	void *aux;
    111 {
    112 	struct mii_attach_args *ma = aux;
    113 
    114 	if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_INTEL &&
    115 	    MII_MODEL(ma->mii_id2) == MII_MODEL_INTEL_I82555)
    116 		return (1);
    117 
    118 	return (0);
    119 }
    120 
    121 void
    122 inphyattach(parent, self, aux)
    123 	struct device *parent, *self;
    124 	void *aux;
    125 {
    126 	struct inphy_softc *sc = (struct inphy_softc *)self;
    127 	struct mii_attach_args *ma = aux;
    128 	struct mii_data *mii = ma->mii_data;
    129 
    130 	printf(": %s, rev. %d\n", MII_STR_INTEL_I82555,
    131 	    MII_REV(ma->mii_id2));
    132 
    133 	sc->sc_mii.mii_inst = mii->mii_instance;
    134 	sc->sc_mii.mii_phy = ma->mii_phyno;
    135 	sc->sc_mii.mii_service = inphy_service;
    136 	sc->sc_mii.mii_pdata = mii;
    137 
    138 	/*
    139 	 * i82557 wedges if all of its PHYs are isolated!
    140 	 */
    141 	if (strcmp(parent->dv_cfdata->cf_driver->cd_name, "fxp") == 0 &&
    142 	    mii->mii_instance == 0)
    143 		sc->sc_mii.mii_flags |= MIIF_NOISOLATE;
    144 
    145 #define	ADD(m, c)	ifmedia_add(&mii->mii_media, (m), (c), NULL)
    146 
    147 	if ((sc->sc_mii.mii_flags & MIIF_NOISOLATE) == 0)
    148 		ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->sc_mii.mii_inst),
    149 		    BMCR_ISO);
    150 
    151 	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->sc_mii.mii_inst),
    152 	    BMCR_LOOP|BMCR_S100);
    153 
    154 	mii_phy_reset(&sc->sc_mii);
    155 
    156 	sc->sc_mii.mii_capabilities =
    157 	    PHY_READ(&sc->sc_mii, MII_BMSR) & ma->mii_capmask;
    158 	printf("%s: ", sc->sc_mii.mii_dev.dv_xname);
    159 	if ((sc->sc_mii.mii_capabilities & BMSR_MEDIAMASK) == 0)
    160 		printf("no media present");
    161 	else
    162 		mii_add_media(mii, sc->sc_mii.mii_capabilities,
    163 		    sc->sc_mii.mii_inst);
    164 	printf("\n");
    165 #undef ADD
    166 }
    167 
    168 int
    169 inphy_service(self, mii, cmd)
    170 	struct mii_softc *self;
    171 	struct mii_data *mii;
    172 	int cmd;
    173 {
    174 	struct inphy_softc *sc = (struct inphy_softc *)self;
    175 	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
    176 	int reg;
    177 
    178 	switch (cmd) {
    179 	case MII_POLLSTAT:
    180 		/*
    181 		 * If we're not polling our PHY instance, just return.
    182 		 */
    183 		if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst)
    184 			return (0);
    185 		break;
    186 
    187 	case MII_MEDIACHG:
    188 		/*
    189 		 * If the media indicates a different PHY instance,
    190 		 * isolate ourselves.
    191 		 */
    192 		if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) {
    193 			reg = PHY_READ(&sc->sc_mii, MII_BMCR);
    194 			PHY_WRITE(&sc->sc_mii, MII_BMCR, reg | BMCR_ISO);
    195 			return (0);
    196 		}
    197 
    198 		/*
    199 		 * If the interface is not up, don't do anything.
    200 		 */
    201 		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
    202 			break;
    203 
    204 		switch (IFM_SUBTYPE(ife->ifm_media)) {
    205 		case IFM_AUTO:
    206 			/*
    207 			 * If we're already in auto mode, just return.
    208 			 */
    209 			if (PHY_READ(&sc->sc_mii, MII_BMCR) & BMCR_AUTOEN)
    210 				return (0);
    211 			(void) mii_phy_auto(&sc->sc_mii);
    212 			break;
    213 		case IFM_100_T4:
    214 			/*
    215 			 * XXX Not supported as a manual setting right now.
    216 			 */
    217 			return (EINVAL);
    218 		default:
    219 			/*
    220 			 * BMCR data is stored in the ifmedia entry.
    221 			 */
    222 			PHY_WRITE(&sc->sc_mii, MII_ANAR,
    223 			    mii_anar(ife->ifm_media));
    224 			PHY_WRITE(&sc->sc_mii, MII_BMCR, ife->ifm_data);
    225 		}
    226 		break;
    227 
    228 	case MII_TICK:
    229 		/*
    230 		 * If we're not currently selected, just return.
    231 		 */
    232 		if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst)
    233 			return (0);
    234 
    235 		/*
    236 		 * Only used for autonegotiation.
    237 		 */
    238 		if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
    239 			return (0);
    240 
    241 		/*
    242 		 * Is the interface even up?
    243 		 */
    244 		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
    245 			return (0);
    246 
    247 		/*
    248 		 * Check to see if we have link.  If we do, we don't
    249 		 * need to restart the autonegotiation process.  Read
    250 		 * the BMSR twice in case it's latched.
    251 		 */
    252 		reg = PHY_READ(&sc->sc_mii, MII_BMSR) |
    253 		    PHY_READ(&sc->sc_mii, MII_BMSR);
    254 		if (reg & BMSR_LINK)
    255 			return (0);
    256 
    257 		/*
    258 		 * Only retry autonegotiation every 5 seconds.
    259 		 */
    260 		if (++sc->sc_ticks != 5)
    261 			return (0);
    262 
    263 		sc->sc_ticks = 0;
    264 		mii_phy_reset(&sc->sc_mii);
    265 		(void) mii_phy_auto(&sc->sc_mii);
    266 		break;
    267 	}
    268 
    269 	/* Update the media status. */
    270 	inphy_status(sc);
    271 
    272 	/* Callback if something changed. */
    273 	if (sc->sc_active != mii->mii_media_active || cmd == MII_MEDIACHG) {
    274 		(*mii->mii_statchg)(sc->sc_mii.mii_dev.dv_parent);
    275 		sc->sc_active = mii->mii_media_active;
    276 	}
    277 	return (0);
    278 }
    279 
    280 void
    281 inphy_status(sc)
    282 	struct inphy_softc *sc;
    283 {
    284 	struct mii_data *mii = sc->sc_mii.mii_pdata;
    285 	int bmsr, bmcr, scr;
    286 
    287 	mii->mii_media_status = IFM_AVALID;
    288 	mii->mii_media_active = IFM_ETHER;
    289 
    290 	bmsr = PHY_READ(&sc->sc_mii, MII_BMSR) |
    291 	    PHY_READ(&sc->sc_mii, MII_BMSR);
    292 	if (bmsr & BMSR_LINK)
    293 		mii->mii_media_status |= IFM_ACTIVE;
    294 
    295 	bmcr = PHY_READ(&sc->sc_mii, MII_BMCR);
    296 	if (bmcr & BMCR_ISO) {
    297 		mii->mii_media_active |= IFM_NONE;
    298 		mii->mii_media_status = 0;
    299 		return;
    300 	}
    301 
    302 	if (bmcr & BMCR_LOOP)
    303 		mii->mii_media_active |= IFM_LOOP;
    304 
    305 	if (bmcr & BMCR_AUTOEN) {
    306 		if ((bmsr & BMSR_ACOMP) == 0) {
    307 			/* Erg, still trying, I guess... */
    308 			mii->mii_media_active |= IFM_NONE;
    309 			return;
    310 		}
    311 		scr = PHY_READ(&sc->sc_mii, MII_INPHY_SCR);
    312 		if (scr & SCR_T4)
    313 			mii->mii_media_active |= IFM_100_T4;
    314 		else if (scr & SCR_S100)
    315 			mii->mii_media_active |= IFM_100_TX;
    316 		else
    317 			mii->mii_media_active |= IFM_10_T;
    318 		if (scr & SCR_FDX)
    319 			mii->mii_media_active |= IFM_FDX;
    320 	} else {
    321 		if (bmcr & BMCR_S100)
    322 			mii->mii_media_active |= IFM_100_TX;
    323 		else
    324 			mii->mii_media_active |= IFM_10_T;
    325 		if (bmcr & BMCR_FDX)
    326 			mii->mii_media_active |= IFM_FDX;
    327 	}
    328 }
    329