sys/dev/mii/acphy.c

   1 /*      $NetBSD: acphy.c,v 1.22 2008/05/04 17:06:09 xtraeme Exp $       */
   2
   3 /*
   4  * Copyright 2001 Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the NetBSD Project by
  20  *      Wasabi Systems, Inc.
  21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  22  *    or promote products derived from this software without specific prior
  23  *    written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 /*
  39  * Driver for the Altima AC101 PHY.
  40  */
  41
  42 #include <sys/cdefs.h>
  43 __KERNEL_RCSID(0, "$NetBSD: acphy.c,v 1.22 2008/05/04 17:06:09 xtraeme Exp $");
  44
  45 #include <sys/param.h>
  46 #include <sys/systm.h>
  47 #include <sys/kernel.h>
  48 #include <sys/device.h>
  49 #include <sys/socket.h>
  50 #include <sys/errno.h>
  51
  52 #include <net/if.h>
  53 #include <net/if_media.h>
  54
  55 #include <dev/mii/mii.h>
  56 #include <dev/mii/miivar.h>
  57 #include <dev/mii/miidevs.h>
  58
  59 #include <dev/mii/acphyreg.h>
  60
  61 static int      acphymatch(device_t, cfdata_t, void *);
  62 static void     acphyattach(device_t, device_t, void *);
  63
  64 CFATTACH_DECL_NEW(acphy, sizeof(struct mii_softc),
  65     acphymatch, acphyattach, mii_phy_detach, mii_phy_activate);
  66
  67 static int      acphy_service(struct mii_softc *, struct mii_data *, int);
  68 static void     acphy_status(struct mii_softc *);
  69
  70 static const struct mii_phy_funcs acphy_funcs = {
  71         acphy_service, acphy_status, mii_phy_reset,
  72 };
  73
  74 static const struct mii_phydesc acphys[] = {
  75         { MII_OUI_ALTIMA,               MII_MODEL_ALTIMA_AC101,
  76           MII_STR_ALTIMA_AC101 },
  77         { MII_OUI_ALTIMA,               MII_MODEL_ALTIMA_AC101L,
  78           MII_STR_ALTIMA_AC101L },
  79         { MII_OUI_ALTIMA,               MII_MODEL_ALTIMA_Am79C874,
  80           MII_STR_ALTIMA_Am79C874 },
  81         { MII_OUI_ALTIMA,               MII_MODEL_ALTIMA_Am79C875,
  82           MII_STR_ALTIMA_Am79C875 },
  83
  84         /* XXX This is reported to work, but it's not from any data sheet. */
  85         { MII_OUI_ALTIMA,               MII_MODEL_ALTIMA_ACXXX,
  86           MII_STR_ALTIMA_ACXXX },
  87
  88         { 0,                            0,
  89           NULL },
  90 };
  91
  92 static int
  93 acphymatch(device_t parent, cfdata_t match, void *aux)
  94 {
  95         struct mii_attach_args *ma = aux;
  96
  97         if (mii_phy_match(ma, acphys) != NULL)
  98                 return (10);
  99
 100         return (0);
 101 }
 102
 103 static void
 104 acphyattach(device_t parent, device_t self, void *aux)
 105 {
 106         struct mii_softc *sc = device_private(self);
 107         struct mii_attach_args *ma = aux;
 108         struct mii_data *mii = ma->mii_data;
 109         const struct mii_phydesc *mpd;
 110
 111         mpd = mii_phy_match(ma, acphys);
 112         aprint_naive(": Media interface\n");
 113         aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
 114
 115         sc->mii_dev = self;
 116         sc->mii_inst = mii->mii_instance;
 117         sc->mii_phy = ma->mii_phyno;
 118         sc->mii_funcs = &acphy_funcs;
 119         sc->mii_pdata = mii;
 120         sc->mii_flags = ma->mii_flags;
 121         sc->mii_anegticks = MII_ANEGTICKS;
 122
 123         PHY_RESET(sc);
 124
 125         /*
 126          * XXX Check MCR_FX_SEL to set MIIF_HAVE_FIBER?
 127          */
 128
 129         sc->mii_capabilities =
 130             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
 131         aprint_normal_dev(sc->mii_dev, "");
 132
 133 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
 134         if (sc->mii_flags & MIIF_HAVEFIBER) {
 135                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, 0, sc->mii_inst),
 136                     MII_MEDIA_100_TX);
 137                 aprint_normal("100baseFX, ");
 138                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, IFM_FDX, sc->mii_inst),
 139                     MII_MEDIA_100_TX);
 140                 aprint_normal("100baseFX-FDX, ");
 141         }
 142 #undef ADD
 143
 144         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
 145                 aprint_error("no media present");
 146         else
 147                 mii_phy_add_media(sc);
 148         aprint_normal("\n");
 149 }
 150
 151 static int
 152 acphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 153 {
 154         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 155         int reg;
 156
 157         switch (cmd) {
 158         case MII_POLLSTAT:
 159                 /*
 160                  * If we're not polling our PHY instance, just return.
 161                  */
 162                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 163                         return (0);
 164                 break;
 165
 166         case MII_MEDIACHG:
 167                 /*
 168                  * If the media indicates a different PHY instance,
 169                  * isolate ourselves.
 170                  */
 171                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
 172                         reg = PHY_READ(sc, MII_BMCR);
 173                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
 174                         return (0);
 175                 }
 176
 177                 /*
 178                  * If the interface is not up, don't do anything.
 179                  */
 180                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 181                         break;
 182
 183                 mii_phy_setmedia(sc);
 184                 break;
 185
 186         case MII_TICK:
 187                 /*
 188                  * If we're not currently selected, just return.
 189                  */
 190                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 191                         return (0);
 192
 193                 if (mii_phy_tick(sc) == EJUSTRETURN)
 194                         return (0);
 195                 break;
 196
 197         case MII_DOWN:
 198                 mii_phy_down(sc);
 199                 return (0);
 200         }
 201
 202         /* Update the media status. */
 203         mii_phy_status(sc);
 204
 205         /* Callback if something changed. */
 206         mii_phy_update(sc, cmd);
 207         return (0);
 208 }
 209
 210 static void
 211 acphy_status(struct mii_softc *sc)
 212 {
 213         struct mii_data *mii = sc->mii_pdata;
 214         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 215         int bmsr, bmcr, dr;
 216
 217         mii->mii_media_status = IFM_AVALID;
 218         mii->mii_media_active = IFM_ETHER;
 219
 220         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
 221         dr = PHY_READ(sc, MII_ACPHY_DR);
 222
 223         if (bmsr & BMSR_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 if autonegotiation
 239                  * has completed (or it's disabled).
 240                  */
 241                 if ((bmsr & BMSR_ACOMP) == 0) {
 242                         /* Erg, still trying, I guess... */
 243                         mii->mii_media_active |= IFM_NONE;
 244                         return;
 245                 }
 246
 247                 if (dr & DR_SPEED)
 248                         mii->mii_media_active |= IFM_100_TX;
 249                 else
 250                         mii->mii_media_active |= IFM_10_T;
 251                 if (dr & DR_DPLX)
 252                         mii->mii_media_active |= IFM_FDX;
 253         } else
 254                 mii->mii_media_active = ife->ifm_media;
 255 }