sys/dev/mii/lxtphy.c

   1 /*      $NetBSD: lxtphy.c,v 1.47 2008/11/17 03:04:27 dyoung Exp $       */
   2
   3 /*-
   4  * Copyright (c) 1998, 1999, 2000 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  *
  20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 /*
  34  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  46  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  47  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  48  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  49  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  50  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  51  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  52  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  53  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  54  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  55  */
  56
  57 /*
  58  * driver for Level One's LXT-970 ethernet 10/100 PHY
  59  * datasheet from www.level1.com
  60  */
  61
  62 #include <sys/cdefs.h>
  63 __KERNEL_RCSID(0, "$NetBSD: lxtphy.c,v 1.47 2008/11/17 03:04:27 dyoung Exp $");
  64
  65 #include <sys/param.h>
  66 #include <sys/systm.h>
  67 #include <sys/kernel.h>
  68 #include <sys/device.h>
  69 #include <sys/socket.h>
  70 #include <sys/errno.h>
  71
  72 #include <net/if.h>
  73 #include <net/if_media.h>
  74
  75 #include <dev/mii/mii.h>
  76 #include <dev/mii/miivar.h>
  77 #include <dev/mii/miidevs.h>
  78
  79 #include <dev/mii/lxtphyreg.h>
  80
  81 static int      lxtphymatch(device_t, cfdata_t, void *);
  82 static void     lxtphyattach(device_t, device_t, void *);
  83
  84 CFATTACH_DECL_NEW(lxtphy, sizeof(struct mii_softc),
  85     lxtphymatch, lxtphyattach, mii_phy_detach, mii_phy_activate);
  86
  87 static int      lxtphy_service(struct mii_softc *, struct mii_data *, int);
  88 static void     lxtphy_status(struct mii_softc *);
  89 static void     lxtphy_reset(struct mii_softc *);
  90
  91 static void lxtphy_set_tp(struct mii_softc *);
  92 static void lxtphy_set_fx(struct mii_softc *);
  93
  94 static const struct mii_phy_funcs lxtphy_funcs = {
  95         lxtphy_service, lxtphy_status, lxtphy_reset,
  96 };
  97
  98 static const struct mii_phy_funcs lxtphy971_funcs = {
  99         lxtphy_service, ukphy_status, lxtphy_reset,
 100 };
 101
 102 static const struct mii_phydesc lxtphys[] = {
 103         { MII_OUI_xxLEVEL1,             MII_MODEL_xxLEVEL1_LXT970,
 104           MII_STR_xxLEVEL1_LXT970 },
 105
 106         { MII_OUI_LEVEL1,               MII_MODEL_LEVEL1_LXT971,
 107           MII_STR_LEVEL1_LXT971 },
 108
 109         { 0,                            0,
 110           NULL },
 111 };
 112
 113 static int
 114 lxtphymatch(device_t parent, cfdata_t match, void *aux)
 115 {
 116         struct mii_attach_args *ma = aux;
 117
 118         if (mii_phy_match(ma, lxtphys) != NULL)
 119                 return (10);
 120
 121         return (0);
 122 }
 123
 124 static void
 125 lxtphyattach(device_t parent, device_t self, void *aux)
 126 {
 127         struct mii_softc *sc = device_private(self);
 128         struct mii_attach_args *ma = aux;
 129         struct mii_data *mii = ma->mii_data;
 130         const struct mii_phydesc *mpd;
 131
 132         mpd = mii_phy_match(ma, lxtphys);
 133         aprint_naive(": Media interface\n");
 134         aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
 135
 136         sc->mii_dev = self;
 137         sc->mii_inst = mii->mii_instance;
 138         sc->mii_phy = ma->mii_phyno;
 139         if (mpd->mpd_model == MII_MODEL_LEVEL1_LXT971)
 140                 sc->mii_funcs = &lxtphy971_funcs;
 141         else
 142                 sc->mii_funcs = &lxtphy_funcs;
 143         sc->mii_pdata = mii;
 144         sc->mii_flags = ma->mii_flags;
 145         sc->mii_anegticks = MII_ANEGTICKS;
 146
 147         PHY_RESET(sc);
 148
 149         sc->mii_capabilities =
 150             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
 151         aprint_normal_dev(self, "");
 152
 153         if (sc->mii_flags & MIIF_HAVEFIBER) {
 154 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
 155                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, 0, sc->mii_inst),
 156                     MII_MEDIA_100_TX);
 157                 aprint_normal("100baseFX, ");
 158                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, IFM_FDX, sc->mii_inst),
 159                     MII_MEDIA_100_TX_FDX);
 160                 aprint_normal("100baseFX-FDX, ");
 161 #undef ADD
 162         }
 163
 164         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
 165                 aprint_error("no media present");
 166         else
 167                 mii_phy_add_media(sc);
 168         aprint_normal("\n");
 169 }
 170
 171 static int
 172 lxtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 173 {
 174         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 175         int reg;
 176
 177         switch (cmd) {
 178         case MII_POLLSTAT:
 179                 /*
 180                  * If we're not polling our PHY instance, just return.
 181                  */
 182                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 183                         return (0);
 184                 break;
 185
 186         case MII_MEDIACHG:
 187                 /*
 188                  * If the media indicates a different PHY instance,
 189                  * isolate ourselves.
 190                  */
 191                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
 192                         reg = PHY_READ(sc, MII_BMCR);
 193                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
 194                         return (0);
 195                 }
 196
 197                 /*
 198                  * If the interface is not up, don't do anything.
 199                  */
 200                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 201                         break;
 202
 203                 if (IFM_SUBTYPE(ife->ifm_media) == IFM_100_FX)
 204                         lxtphy_set_fx(sc);
 205                 else
 206                         lxtphy_set_tp(sc);
 207
 208                 mii_phy_setmedia(sc);
 209                 break;
 210
 211         case MII_TICK:
 212                 /*
 213                  * If we're not currently selected, just return.
 214                  */
 215                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 216                         return (0);
 217
 218                 if (mii_phy_tick(sc) == EJUSTRETURN)
 219                         return (0);
 220                 break;
 221
 222         case MII_DOWN:
 223                 mii_phy_down(sc);
 224                 return (0);
 225         }
 226
 227         /* Update the media status. */
 228         mii_phy_status(sc);
 229
 230         /* Callback if something changed. */
 231         mii_phy_update(sc, cmd);
 232         return (0);
 233 }
 234
 235 static void
 236 lxtphy_status(struct mii_softc *sc)
 237 {
 238         struct mii_data *mii = sc->mii_pdata;
 239         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 240         int bmcr, bmsr, csr;
 241
 242         mii->mii_media_status = IFM_AVALID;
 243         mii->mii_media_active = IFM_ETHER;
 244
 245         /*
 246          * Get link status from the CSR; we need to read the CSR
 247          * for media type anyhow, and the link status in the CSR
 248          * doens't latch, so fewer register reads are required.
 249          */
 250         csr = PHY_READ(sc, MII_LXTPHY_CSR);
 251         if (csr & CSR_LINK)
 252                 mii->mii_media_status |= IFM_ACTIVE;
 253
 254         bmcr = PHY_READ(sc, MII_BMCR);
 255         if (bmcr & BMCR_ISO) {
 256                 mii->mii_media_active |= IFM_NONE;
 257                 mii->mii_media_status = 0;
 258                 return;
 259         }
 260
 261         if (bmcr & BMCR_LOOP)
 262                 mii->mii_media_active |= IFM_LOOP;
 263
 264         if (bmcr & BMCR_AUTOEN) {
 265                 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
 266                 if ((bmsr & BMSR_ACOMP) == 0) {
 267                         /* Erg, still trying, I guess... */
 268                         mii->mii_media_active |= IFM_NONE;
 269                         return;
 270                 }
 271                 if (csr & CSR_SPEED)
 272                         mii->mii_media_active |= IFM_100_TX;
 273                 else
 274                         mii->mii_media_active |= IFM_10_T;
 275                 if (csr & CSR_DUPLEX)
 276                         mii->mii_media_active |= IFM_FDX;
 277         } else
 278                 mii->mii_media_active = ife->ifm_media;
 279 }
 280
 281 static void
 282 lxtphy_reset(struct mii_softc *sc)
 283 {
 284
 285         mii_phy_reset(sc);
 286         PHY_WRITE(sc, MII_LXTPHY_IER,
 287             PHY_READ(sc, MII_LXTPHY_IER) & ~IER_INTEN);
 288 }
 289
 290 static void
 291 lxtphy_set_tp(struct mii_softc *sc)
 292 {
 293         int cfg;
 294
 295         cfg = PHY_READ(sc, MII_LXTPHY_CONFIG);
 296         cfg &= ~CONFIG_100BASEFX;
 297         PHY_WRITE(sc, MII_LXTPHY_CONFIG, cfg);
 298 }
 299
 300 static void
 301 lxtphy_set_fx(struct mii_softc *sc)
 302 {
 303         int cfg;
 304
 305         cfg = PHY_READ(sc, MII_LXTPHY_CONFIG);
 306         cfg |= CONFIG_100BASEFX;
 307         PHY_WRITE(sc, MII_LXTPHY_CONFIG, cfg);
 308 }