sys/dev/mii/glxtphy.c

   1 /*      $NetBSD: glxtphy.c,v 1.22 2008/11/17 03:04:27 dyoung 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  *
  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 the Level One LXT-1000 10/100/1000 PHY.
  59  */
  60
  61 #include <sys/cdefs.h>
  62 __KERNEL_RCSID(0, "$NetBSD: glxtphy.c,v 1.22 2008/11/17 03:04:27 dyoung Exp $");
  63
  64 #include <sys/param.h>
  65 #include <sys/systm.h>
  66 #include <sys/kernel.h>
  67 #include <sys/device.h>
  68 #include <sys/socket.h>
  69 #include <sys/errno.h>
  70
  71 #include <net/if.h>
  72 #include <net/if_media.h>
  73
  74 #include <dev/mii/mii.h>
  75 #include <dev/mii/miivar.h>
  76 #include <dev/mii/miidevs.h>
  77
  78 #include <dev/mii/glxtphyreg.h>
  79
  80 static int      glxtphymatch(device_t, cfdata_t, void *);
  81 static void     glxtphyattach(device_t, device_t, void *);
  82
  83 CFATTACH_DECL_NEW(glxtphy, sizeof(struct mii_softc),
  84     glxtphymatch, glxtphyattach, mii_phy_detach, mii_phy_activate);
  85
  86 static int      glxtphy_service(struct mii_softc *, struct mii_data *, int);
  87 static void     glxtphy_status(struct mii_softc *);
  88
  89 static const struct mii_phy_funcs glxtphy_funcs = {
  90         glxtphy_service, glxtphy_status, mii_phy_reset,
  91 };
  92
  93 static const struct mii_phydesc glxtphys[] = {
  94         { MII_OUI_LEVEL1,               MII_MODEL_LEVEL1_LXT1000_OLD,
  95           MII_STR_LEVEL1_LXT1000_OLD },
  96
  97         { MII_OUI_LEVEL1,               MII_MODEL_LEVEL1_LXT1000_OLD,
  98           MII_STR_LEVEL1_LXT1000_OLD },
  99
 100         { 0,                            0,
 101           NULL },
 102 };
 103
 104 static int
 105 glxtphymatch(device_t parent, cfdata_t match,
 106     void *aux)
 107 {
 108         struct mii_attach_args *ma = aux;
 109
 110         if (mii_phy_match(ma, glxtphys) != NULL)
 111                 return (10);
 112
 113         return (0);
 114 }
 115
 116 static void
 117 glxtphyattach(device_t parent, device_t self, void *aux)
 118 {
 119         struct mii_softc *sc = device_private(self);
 120         struct mii_attach_args *ma = aux;
 121         struct mii_data *mii = ma->mii_data;
 122         const struct mii_phydesc *mpd;
 123
 124         mpd = mii_phy_match(ma, glxtphys);
 125         aprint_naive(": Media interface\n");
 126         aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
 127
 128         sc->mii_dev = self;
 129         sc->mii_inst = mii->mii_instance;
 130         sc->mii_phy = ma->mii_phyno;
 131         sc->mii_funcs = &glxtphy_funcs;
 132         sc->mii_pdata = mii;
 133         sc->mii_flags = ma->mii_flags;
 134         sc->mii_anegticks = MII_ANEGTICKS;
 135
 136         PHY_RESET(sc);
 137
 138         sc->mii_capabilities =
 139             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
 140         if (sc->mii_capabilities & BMSR_EXTSTAT)
 141                 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
 142
 143         aprint_normal_dev(self, "");
 144         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0 &&
 145             (sc->mii_extcapabilities & EXTSR_MEDIAMASK) == 0)
 146                 aprint_error("no media present");
 147         else
 148                 mii_phy_add_media(sc);
 149         aprint_normal("\n");
 150 }
 151
 152 static int
 153 glxtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 154 {
 155         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 156         int reg;
 157
 158         switch (cmd) {
 159         case MII_POLLSTAT:
 160                 /*
 161                  * If we're not polling our PHY instance, just return.
 162                  */
 163                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 164                         return (0);
 165                 break;
 166
 167         case MII_MEDIACHG:
 168                 /*
 169                  * If the media indicates a different PHY instance,
 170                  * isolate ourselves.
 171                  */
 172                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
 173                         reg = PHY_READ(sc, MII_BMCR);
 174                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
 175                         return (0);
 176                 }
 177
 178                 /*
 179                  * If the interface is not up, don't do anything.
 180                  */
 181                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 182                         break;
 183
 184                 mii_phy_setmedia(sc);
 185                 break;
 186
 187         case MII_TICK:
 188                 /*
 189                  * If we're not currently selected, just return.
 190                  */
 191                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 192                         return (0);
 193
 194                 if (mii_phy_tick(sc) == EJUSTRETURN)
 195                         return (0);
 196                 break;
 197
 198         case MII_DOWN:
 199                 mii_phy_down(sc);
 200                 return (0);
 201         }
 202
 203         /* Update the media status. */
 204         mii_phy_status(sc);
 205
 206         /* Callback if something changed. */
 207         mii_phy_update(sc, cmd);
 208         return (0);
 209 }
 210
 211 static void
 212 glxtphy_status(struct mii_softc *sc)
 213 {
 214         struct mii_data *mii = sc->mii_pdata;
 215         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 216         int bmcr, qsr, gtsr;
 217
 218         mii->mii_media_status = IFM_AVALID;
 219         mii->mii_media_active = IFM_ETHER;
 220
 221         qsr = PHY_READ(sc, MII_GLXTPHY_QSR);
 222
 223         if (qsr & QSR_LINK)
 224                 mii->mii_media_status |= IFM_ACTIVE;
 225
 226         bmcr = PHY_READ(sc, MII_BMCR);
 227         if (bmcr & BMCR_ISO) {
 228                 mii->mii_media_active |= IFM_NONE;
 229                 mii->mii_media_status = 0;
 230                 return;
 231         }
 232
 233         if (bmcr & BMCR_LOOP)
 234                 mii->mii_media_active |= IFM_LOOP;
 235
 236         if (bmcr & BMCR_AUTOEN) {
 237                 /*
 238                  * The media status bits are only valid of autonegotiation
 239                  * has completed (or it's disabled).
 240                  */
 241                 if ((qsr & QSR_ACOMP) == 0) {
 242                         /* Erg, still trying, I guess... */
 243                         mii->mii_media_active |= IFM_NONE;
 244                         return;
 245                 }
 246
 247                 switch (QSR_SPEED_get(qsr)) {
 248                 case SPEED_1000:
 249                         mii->mii_media_active |= IFM_1000_T;
 250                         gtsr = PHY_READ(sc, MII_100T2SR);
 251                         if (gtsr & GTSR_MS_RES)
 252                                 mii->mii_media_active |= IFM_ETH_MASTER;
 253                         break;
 254
 255                 case SPEED_100:
 256                         mii->mii_media_active |= IFM_100_TX;
 257                         break;
 258
 259                 case SPEED_10_MII:
 260                 case SPEED_10_SERIAL:
 261                         mii->mii_media_active |= IFM_10_T;
 262                         break;
 263                 }
 264
 265                 if (qsr & QSR_DUPLEX)
 266                         mii->mii_media_active |=
 267                             IFM_FDX | mii_phy_flowstatus(sc);
 268         } else
 269                 mii->mii_media_active = ife->ifm_media;
 270 }