sys/dev/netif/mii_layer/acphy.c

   1 /*      $NetBSD: acphy.c,v 1.16 2006/03/29 07:05:24 thorpej Exp $       */
   2
   3 /*
   4  * Copyright (c) 1998, 1999 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  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *      This product includes software developed by the NetBSD
  22  *      Foundation, Inc. and its contributors.
  23  * 4. Neither the name of The NetBSD Foundation nor the names of its
  24  *    contributors may be used to endorse or promote products derived
  25  *    from this software without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  37  * POSSIBILITY OF SUCH DAMAGE.
  38  *
  39  * $FreeBSD: src/sys/dev/mii/acphy.c,v 1.2.2.2 2002/10/21 21:20:19 semenu Exp $
  40  * $DragonFly: src/sys/dev/netif/mii_layer/acphy.c,v 1.10 2006/12/22 23:26:20 swildner Exp $
  41  */
  42
  43 /*
  44  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
  45  *
  46  * Redistribution and use in source and binary forms, with or without
  47  * modification, are permitted provided that the following conditions
  48  * are met:
  49  * 1. Redistributions of source code must retain the above copyright
  50  *    notice, this list of conditions and the following disclaimer.
  51  * 2. Redistributions in binary form must reproduce the above copyright
  52  *    notice, this list of conditions and the following disclaimer in the
  53  *    documentation and/or other materials provided with the distribution.
  54  * 3. All advertising materials mentioning features or use of this software
  55  *    must display the following acknowledgement:
  56  *      This product includes software developed by Manuel Bouyer.
  57  * 4. The name of the author may not be used to endorse or promote products
  58  *    derived from this software without specific prior written permission.
  59  *
  60  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  61  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  62  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  63  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  64  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  65  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  66  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  67  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  68  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  69  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  70  */
  71
  72 /*
  73  * Driver for Altima AC101 10/100 PHY
  74  */
  75
  76 #include <sys/param.h>
  77 #include <sys/systm.h>
  78 #include <sys/kernel.h>
  79 #include <sys/socket.h>
  80 #include <sys/errno.h>
  81 #include <sys/module.h>
  82 #include <sys/bus.h>
  83
  84 #include <net/if.h>
  85 #include <net/if_media.h>
  86
  87 #include "mii.h"
  88 #include "miivar.h"
  89 #include "miidevs.h"
  90
  91 #include "acphyreg.h"
  92
  93 #include "miibus_if.h"
  94
  95 static int acphy_probe          (device_t);
  96 static int acphy_attach         (device_t);
  97
  98 static device_method_t acphy_methods[] = {
  99         /* device interface */
 100         DEVMETHOD(device_probe,         acphy_probe),
 101         DEVMETHOD(device_attach,        acphy_attach),
 102         DEVMETHOD(device_detach,        ukphy_detach),
 103         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
 104         { 0, 0 }
 105 };
 106
 107 static const struct mii_phydesc acphys[] = {
 108         MII_PHYDESC(xxALTIMA,   AC101),
 109         MII_PHYDESC(xxALTIMA,   AC101L),
 110         MII_PHYDESC(xxALTIMA,   AC_UNKNOWN),
 111         MII_PHYDESC(xxALTIMA,   Am79C875),
 112         MII_PHYDESC_NULL
 113 };
 114
 115 static devclass_t acphy_devclass;
 116
 117 static driver_t acphy_driver = {
 118         "acphy",
 119         acphy_methods,
 120         sizeof(struct mii_softc)
 121 };
 122
 123 DRIVER_MODULE(acphy, miibus, acphy_driver, acphy_devclass, 0, 0);
 124
 125 static int      acphy_service(struct mii_softc *, struct mii_data *, int);
 126 static void     acphy_reset(struct mii_softc *);
 127 static void     acphy_status(struct mii_softc *);
 128
 129 static int
 130 acphy_probe(device_t dev)
 131 {
 132         struct mii_attach_args *ma = device_get_ivars(dev);
 133         const struct mii_phydesc *mpd;
 134
 135         mpd = mii_phy_match(ma, acphys);
 136         if (mpd != NULL) {
 137                 device_set_desc(dev, mpd->mpd_name);
 138                 return (0);
 139         }
 140         return (ENXIO);
 141 }
 142
 143 static int
 144 acphy_attach(device_t dev)
 145 {
 146         struct mii_softc *sc;
 147         struct mii_attach_args *ma;
 148         struct mii_data *mii;
 149
 150         sc = device_get_softc(dev);
 151         ma = device_get_ivars(dev);
 152         mii_softc_init(sc, ma);
 153         sc->mii_dev = device_get_parent(dev);
 154         mii = device_get_softc(sc->mii_dev);
 155         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
 156
 157         sc->mii_inst = mii->mii_instance;
 158         sc->mii_service = acphy_service;
 159         sc->mii_reset = acphy_reset;
 160         sc->mii_pdata = mii;
 161         sc->mii_flags |= MIIF_NOISOLATE;
 162
 163         acphy_reset(sc);
 164
 165         mii->mii_instance++;
 166
 167         sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
 168         device_printf(dev, " ");
 169         if (sc->mii_capabilities & BMSR_MEDIAMASK)
 170                 mii_phy_add_media(sc);
 171         else
 172                 kprintf("no media present");
 173         kprintf("\n");
 174
 175         MIIBUS_MEDIAINIT(sc->mii_dev);
 176         return (0);
 177 }
 178
 179 static int
 180 acphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 181 {
 182         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 183         int reg;
 184
 185         /*
 186          * If we're not selected, then do nothing, just isolate and power
 187          * down, if changing media.
 188          */
 189         if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
 190                 if (cmd == MII_MEDIACHG) {
 191                         reg = PHY_READ(sc, MII_BMCR);
 192                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO | BMCR_PDOWN);
 193                 }
 194
 195                 return (0);
 196         }
 197
 198         switch (cmd) {
 199         case MII_POLLSTAT:
 200                 break;
 201
 202         case MII_MEDIACHG:
 203                 /*
 204                  * If the interface is not up, don't do anything.
 205                  */
 206                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 207                         break;
 208
 209                 mii_phy_set_media(sc);
 210                 break;
 211
 212         case MII_TICK:
 213                 /*
 214                  * Is the interface even up?
 215                  */
 216                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 217                         return (0);
 218
 219                 /*
 220                  * Only used for autonegotiation.
 221                  */
 222                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
 223                         break;
 224
 225                 /*
 226                  * This PHY's autonegotiation doesn't need to be kicked.
 227                  */
 228                 break;
 229         }
 230
 231         /* Update the media status. */
 232         acphy_status(sc);
 233
 234         /* Callback if something changed. */
 235         mii_phy_update(sc, cmd);
 236         return (0);
 237 }
 238
 239 static void
 240 acphy_status(struct mii_softc *sc)
 241 {
 242         struct mii_data *mii = sc->mii_pdata;
 243         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 244         int bmsr, bmcr;
 245
 246         mii->mii_media_status = IFM_AVALID;
 247         mii->mii_media_active = IFM_ETHER;
 248
 249         bmsr = PHY_READ(sc, MII_BMSR) |
 250             PHY_READ(sc, MII_BMSR);
 251         if (bmsr & BMSR_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                 int diag;
 266
 267                 if ((bmsr & BMSR_ACOMP) == 0) {
 268                         /* Erg, still trying, I guess... */
 269                         mii->mii_media_active |= IFM_NONE;
 270                         return;
 271                 }
 272
 273                 diag = PHY_READ(sc, MII_ACPHY_DIAG);
 274                 if (diag & AC_DIAG_SPEED)
 275                         mii->mii_media_active |= IFM_100_TX;
 276                 else
 277                         mii->mii_media_active |= IFM_10_T;
 278
 279                 if (diag & AC_DIAG_DUPLEX)
 280                         mii->mii_media_active |= IFM_FDX;
 281         } else {
 282                 mii->mii_media_active = ife->ifm_media;
 283         }
 284 }
 285
 286 static void
 287 acphy_reset(struct mii_softc *sc)
 288 {
 289         mii_phy_reset(sc);
 290         PHY_WRITE(sc, MII_ACPHY_INT, 0);
 291 }