sys/dev/mii/gentbi.c

   1 /*      $NetBSD: gentbi.c,v 1.23 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 generic ten-bit (1000BASE-SX) interfaces, built in to
  59  * many Gigabit Ethernet chips.
  60  *
  61  * All we have to do here is correctly report speed and duplex.
  62  */
  63
  64 #include <sys/cdefs.h>
  65 __KERNEL_RCSID(0, "$NetBSD: gentbi.c,v 1.23 2008/11/17 03:04:27 dyoung Exp $");
  66
  67 #include <sys/param.h>
  68 #include <sys/systm.h>
  69 #include <sys/kernel.h>
  70 #include <sys/device.h>
  71 #include <sys/socket.h>
  72 #include <sys/errno.h>
  73
  74 #include <net/if.h>
  75 #include <net/if_media.h>
  76
  77 #include <dev/mii/mii.h>
  78 #include <dev/mii/miivar.h>
  79 #include <dev/mii/miidevs.h>
  80
  81 static int      gentbimatch(device_t, cfdata_t, void *);
  82 static void     gentbiattach(device_t, device_t, void *);
  83
  84 CFATTACH_DECL_NEW(gentbi, sizeof(struct mii_softc),
  85     gentbimatch, gentbiattach, mii_phy_detach, mii_phy_activate);
  86
  87 static int      gentbi_service(struct mii_softc *, struct mii_data *, int);
  88 static void     gentbi_status(struct mii_softc *);
  89
  90 static const struct mii_phy_funcs gentbi_funcs = {
  91         gentbi_service, gentbi_status, mii_phy_reset,
  92 };
  93
  94 static int
  95 gentbimatch(device_t parent, cfdata_t match, void *aux)
  96 {
  97         struct mii_attach_args *ma = aux;
  98         struct mii_data *mii = ma->mii_data;
  99         int bmsr, extsr;
 100
 101         /*
 102          * We match as a generic TBI if:
 103          *
 104          *      - There is no media in the BMSR.
 105          *      - EXTSR has only 1000X.
 106          */
 107         bmsr = (*mii->mii_readreg)(parent, ma->mii_phyno, MII_BMSR);
 108         if ((bmsr & BMSR_EXTSTAT) == 0 || (bmsr & BMSR_MEDIAMASK) != 0)
 109                 return (0);
 110
 111         extsr = (*mii->mii_readreg)(parent, ma->mii_phyno, MII_EXTSR);
 112         if (extsr & (EXTSR_1000TFDX|EXTSR_1000THDX))
 113                 return (0);
 114
 115         if (extsr & (EXTSR_1000XFDX|EXTSR_1000XHDX)) {
 116                 /*
 117                  * We think this is a generic TBI.  Return a match
 118                  * priority higher than ukphy, but lower than what
 119                  * specific drivers will return.
 120                  */
 121                 return (2);
 122         }
 123
 124         return (0);
 125 }
 126
 127 static void
 128 gentbiattach(device_t parent, device_t self, void *aux)
 129 {
 130         struct mii_softc *sc = device_private(self);
 131         struct mii_attach_args *ma = aux;
 132         struct mii_data *mii = ma->mii_data;
 133
 134         aprint_naive(": Media interface\n");
 135         aprint_normal(": Generic ten-bit interface, rev. %d\n",
 136             MII_REV(ma->mii_id2));
 137
 138         sc->mii_dev = self;
 139         sc->mii_inst = mii->mii_instance;
 140         sc->mii_phy = ma->mii_phyno;
 141         sc->mii_funcs = &gentbi_funcs;
 142         sc->mii_pdata = mii;
 143         sc->mii_flags = ma->mii_flags;
 144         sc->mii_anegticks = MII_ANEGTICKS;
 145
 146         PHY_RESET(sc);
 147
 148         /*
 149          * Mask out all media in the BMSR.  We only are really interested
 150          * in "auto".
 151          */
 152         sc->mii_capabilities =
 153             PHY_READ(sc, MII_BMSR) & ma->mii_capmask & ~BMSR_MEDIAMASK;
 154         if (sc->mii_capabilities & BMSR_EXTSTAT)
 155                 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
 156
 157         aprint_normal_dev(self, "");
 158         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0 &&
 159             (sc->mii_extcapabilities & EXTSR_MEDIAMASK) == 0)
 160                 aprint_error("no media present");
 161         else
 162                 mii_phy_add_media(sc);
 163         aprint_normal("\n");
 164 }
 165
 166 static int
 167 gentbi_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 168 {
 169         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 170         int reg;
 171
 172         switch (cmd) {
 173         case MII_POLLSTAT:
 174                 /*
 175                  * If we're not polling our PHY instance, just return.
 176                  */
 177                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 178                         return (0);
 179                 break;
 180
 181         case MII_MEDIACHG:
 182                 /*
 183                  * If the media indicates a different PHY instance,
 184                  * isolate ourselves.
 185                  */
 186                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
 187                         reg = PHY_READ(sc, MII_BMCR);
 188                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
 189                         return (0);
 190                 }
 191
 192                 /*
 193                  * If the interface is not up, don't do anything.
 194                  */
 195                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 196                         break;
 197
 198                 mii_phy_setmedia(sc);
 199                 break;
 200
 201         case MII_TICK:
 202                 /*
 203                  * If we're not currently selected, just return.
 204                  */
 205                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 206                         return (0);
 207
 208                 if (mii_phy_tick(sc) == EJUSTRETURN)
 209                         return (0);
 210                 break;
 211
 212         case MII_DOWN:
 213                 mii_phy_down(sc);
 214                 return (0);
 215         }
 216
 217         /* Update the media status. */
 218         mii_phy_status(sc);
 219
 220         /* Callback if something changed. */
 221         mii_phy_update(sc, cmd);
 222         return (0);
 223 }
 224
 225 static void
 226 gentbi_status(struct mii_softc *sc)
 227 {
 228         struct mii_data *mii = sc->mii_pdata;
 229         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 230         int bmsr, bmcr, anlpar;
 231
 232         mii->mii_media_status = IFM_AVALID;
 233         mii->mii_media_active = IFM_ETHER;
 234
 235         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
 236
 237         if (bmsr & BMSR_LINK)
 238                 mii->mii_media_status |= IFM_ACTIVE;
 239
 240         bmcr = PHY_READ(sc, MII_BMCR);
 241         if (bmcr & BMCR_ISO) {
 242                 mii->mii_media_active |= IFM_NONE;
 243                 mii->mii_media_status = 0;
 244                 return;
 245         }
 246
 247         if (bmcr & BMCR_LOOP)
 248                 mii->mii_media_active |= IFM_LOOP;
 249
 250         if (bmcr & BMCR_AUTOEN) {
 251                 /*
 252                  * The media status bits are only valid of autonegotiation
 253                  * has completed (or it's disabled).
 254                  */
 255                 if ((bmsr & BMSR_ACOMP) == 0) {
 256                         /* Erg, still trying, I guess... */
 257                         mii->mii_media_active |= IFM_NONE;
 258                         return;
 259                 }
 260
 261                 /*
 262                  * The media is always 1000baseSX.  Check the ANLPAR to
 263                  * see if we're doing full-duplex.
 264                  */
 265                 mii->mii_media_active |= IFM_1000_SX;
 266
 267                 anlpar = PHY_READ(sc, MII_ANLPAR);
 268                 if ((sc->mii_extcapabilities & EXTSR_1000XFDX) != 0 &&
 269                     (anlpar & ANLPAR_X_FD) != 0)
 270                         mii->mii_media_active |=
 271                             IFM_FDX | mii_phy_flowstatus(sc);
 272         } else
 273                 mii->mii_media_active = ife->ifm_media;
 274 }