sys/dev/mii/tqphy.c

   1 /*      $NetBSD: tqphy.c,v 1.37 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  * TDK TSC78Q2120 PHY driver
  59  *
  60  * Documentation available at http://www.tsc.tdk.com/lan/78Q2120.pdf .
  61  */
  62
  63 #include <sys/cdefs.h>
  64 __KERNEL_RCSID(0, "$NetBSD: tqphy.c,v 1.37 2008/11/17 03:04:27 dyoung Exp $");
  65
  66 #include <sys/param.h>
  67 #include <sys/systm.h>
  68 #include <sys/kernel.h>
  69 #include <sys/device.h>
  70 #include <sys/socket.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/tqphyreg.h>
  80
  81 static int      tqphymatch(device_t, cfdata_t, void *);
  82 static void     tqphyattach(device_t, device_t, void *);
  83
  84 CFATTACH_DECL_NEW(tqphy, sizeof(struct mii_softc),
  85     tqphymatch, tqphyattach, mii_phy_detach, mii_phy_activate);
  86
  87 static int      tqphy_service(struct mii_softc *, struct mii_data *, int);
  88 static void     tqphy_status(struct mii_softc *);
  89
  90 static const struct mii_phy_funcs tqphy_funcs = {
  91         tqphy_service, tqphy_status, mii_phy_reset,
  92 };
  93
  94 static const struct mii_phydesc tqphys[] = {
  95         { MII_OUI_xxTSC,                MII_MODEL_xxTSC_78Q2120,
  96           MII_STR_xxTSC_78Q2120 },
  97 #if 0
  98         { MII_OUI_xxTSC,                MII_MODEL_TSC_78Q2121,
  99           MII_STR_TSC_78Q2121 },
 100 #endif
 101         { 0,                            0,
 102           NULL },
 103 };
 104
 105 static int
 106 tqphymatch(device_t parent, cfdata_t match, void *aux)
 107 {
 108         struct mii_attach_args *ma = aux;
 109
 110         if (mii_phy_match(ma, tqphys) != NULL) {
 111                 /* The DIAG register is unreliable on early revisions. */
 112                 if (MII_MODEL(ma->mii_id2) == MII_MODEL_xxTSC_78Q2120 &&
 113                     MII_REV(ma->mii_id2) <= 3)
 114                         return (0);
 115                 return (10);
 116         }
 117
 118         return (0);
 119 }
 120
 121 static void
 122 tqphyattach(device_t parent, device_t self, void *aux)
 123 {
 124         struct mii_softc *sc = device_private(self);
 125         struct mii_attach_args *ma = aux;
 126         struct mii_data *mii = ma->mii_data;
 127         const struct mii_phydesc *mpd;
 128
 129         mpd = mii_phy_match(ma, tqphys);
 130         aprint_naive(": Media interface\n");
 131         aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
 132
 133         sc->mii_dev = self;
 134         sc->mii_inst = mii->mii_instance;
 135         sc->mii_phy = ma->mii_phyno;
 136         sc->mii_funcs = &tqphy_funcs;
 137         sc->mii_pdata = mii;
 138         sc->mii_flags = ma->mii_flags;
 139         sc->mii_anegticks = MII_ANEGTICKS;
 140
 141         /*
 142          * Apparently, we can't do loopback on this PHY.
 143          */
 144         sc->mii_flags |= MIIF_NOLOOP;
 145
 146         PHY_RESET(sc);
 147
 148         sc->mii_capabilities =
 149             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
 150         aprint_normal_dev(self, "");
 151         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
 152                 aprint_error("no media present");
 153         else
 154                 mii_phy_add_media(sc);
 155         aprint_normal("\n");
 156 }
 157
 158 static int
 159 tqphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 160 {
 161         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 162         int reg;
 163
 164         switch (cmd) {
 165         case MII_POLLSTAT:
 166                 /*
 167                  * If we're not polling our PHY instance, just return.
 168                  */
 169                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 170                         return (0);
 171                 break;
 172
 173         case MII_MEDIACHG:
 174                 /*
 175                  * If the media indicates a different PHY instance,
 176                  * isolate ourselves.
 177                  */
 178                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
 179                         reg = PHY_READ(sc, MII_BMCR);
 180                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
 181                         return (0);
 182                 }
 183
 184                 /*
 185                  * If the interface is not up, don't do anything.
 186                  */
 187                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 188                         break;
 189
 190                 mii_phy_setmedia(sc);
 191                 break;
 192
 193         case MII_TICK:
 194                 /*
 195                  * If we're not currently selected, just return.
 196                  */
 197                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 198                         return (0);
 199
 200                 if (mii_phy_tick(sc) == EJUSTRETURN)
 201                         return (0);
 202                 break;
 203
 204         case MII_DOWN:
 205                 mii_phy_down(sc);
 206                 return (0);
 207         }
 208
 209         /* Update the media status. */
 210         mii_phy_status(sc);
 211
 212         /* Callback if something changed. */
 213         mii_phy_update(sc, cmd);
 214         return (0);
 215 }
 216
 217 static void
 218 tqphy_status(struct mii_softc *sc)
 219 {
 220         struct mii_data *mii = sc->mii_pdata;
 221         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 222         int bmsr, bmcr, diag;
 223
 224         mii->mii_media_status = IFM_AVALID;
 225         mii->mii_media_active = IFM_ETHER;
 226
 227         bmsr = PHY_READ(sc, MII_BMSR) |
 228             PHY_READ(sc, MII_BMSR);
 229         if (bmsr & BMSR_LINK)
 230                 mii->mii_media_status |= IFM_ACTIVE;
 231
 232         bmcr = PHY_READ(sc, MII_BMCR);
 233         if (bmcr & BMCR_ISO) {
 234                 mii->mii_media_active |= IFM_NONE;
 235                 mii->mii_media_status = 0;
 236                 return;
 237         }
 238
 239         if (bmcr & BMCR_LOOP)
 240                 mii->mii_media_active |= IFM_LOOP;
 241
 242         if (bmcr & BMCR_AUTOEN) {
 243                 if ((bmsr & BMSR_ACOMP) == 0) {
 244                         /* Erg, still trying, I guess... */
 245                         mii->mii_media_active |= IFM_NONE;
 246                         return;
 247                 }
 248                 diag = PHY_READ(sc, MII_TQPHY_DIAG);
 249                 if (diag & DIAG_RATE)
 250                         mii->mii_media_active |= IFM_100_TX;
 251                 else
 252                         mii->mii_media_active |= IFM_10_T;
 253                 if (diag & DIAG_DPLX)
 254                         mii->mii_media_active |= IFM_FDX;
 255         } else
 256                 mii->mii_media_active = ife->ifm_media;
 257 }