sys/dev/netif/mii_layer/inphy.c

   1 /*-
   2  * Copyright (c) 2001 Jonathan Lemon
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the author nor the names of any co-contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD: src/sys/dev/mii/inphy.c,v 1.14 2004/05/30 17:57:40 phk Exp $
  30  * $DragonFly: src/sys/dev/netif/mii_layer/inphy.c,v 1.8 2006/12/22 23:26:20 swildner Exp $
  31  */
  32
  33 /*
  34  * driver for Intel 82553 and 82555 PHYs
  35  */
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/kernel.h>
  40 #include <sys/socket.h>
  41 #include <sys/bus.h>
  42
  43 #include <net/if.h>
  44 #include <net/if_media.h>
  45
  46 #include "mii.h"
  47 #include "miivar.h"
  48 #include "miidevs.h"
  49
  50 #include "inphyreg.h"
  51
  52 #include "miibus_if.h"
  53
  54 static int      inphy_probe(device_t dev);
  55 static int      inphy_attach(device_t dev);
  56 static int      inphy_service(struct mii_softc *, struct mii_data *, int);
  57 static void     inphy_status(struct mii_softc *);
  58
  59 static device_method_t inphy_methods[] = {
  60         /* device interface */
  61         DEVMETHOD(device_probe,         inphy_probe),
  62         DEVMETHOD(device_attach,        inphy_attach),
  63         DEVMETHOD(device_detach,        ukphy_detach),
  64         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  65         { 0, 0 }
  66 };
  67
  68 static const struct mii_phydesc inphys[] = {
  69         MII_PHYDESC(xxINTEL,    I82553AB),      /* Intel 82553 A/B steppings */
  70         MII_PHYDESC(INTEL,      I82555),
  71         MII_PHYDESC(INTEL,      I82553C),
  72         MII_PHYDESC(INTEL,      I82562EM),
  73         MII_PHYDESC(INTEL,      I82562ET),
  74         MII_PHYDESC_NULL
  75 };
  76
  77 static devclass_t inphy_devclass;
  78
  79 static driver_t inphy_driver = {
  80         "inphy",
  81         inphy_methods,
  82         sizeof(struct mii_softc)
  83 };
  84
  85 DRIVER_MODULE(inphy, miibus, inphy_driver, inphy_devclass, 0, 0);
  86
  87 static int
  88 inphy_probe(device_t dev)
  89 {
  90         struct mii_attach_args *ma = device_get_ivars(dev);
  91         const struct mii_phydesc *mpd;
  92
  93         mpd = mii_phy_match(ma, inphys);
  94         if (mpd != NULL) {
  95                 device_set_desc(dev, mpd->mpd_name);
  96                 return (0);
  97         }
  98         return (ENXIO);
  99 }
 100
 101 static int
 102 inphy_attach(device_t dev)
 103 {
 104         struct mii_softc *sc;
 105         struct mii_attach_args *ma;
 106         struct mii_data *mii;
 107
 108         sc = device_get_softc(dev);
 109         ma = device_get_ivars(dev);
 110         mii_softc_init(sc, ma);
 111         sc->mii_dev = device_get_parent(dev);
 112         mii = device_get_softc(sc->mii_dev);
 113         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
 114
 115         sc->mii_inst = mii->mii_instance;
 116         sc->mii_service = inphy_service;
 117         sc->mii_pdata = mii;
 118         mii->mii_instance++;
 119
 120 #if 0
 121         sc->mii_flags |= MIIF_NOISOLATE;
 122 #endif
 123
 124         ifmedia_add(&mii->mii_media,
 125             IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
 126             MII_MEDIA_100_TX, NULL);
 127
 128         mii_phy_reset(sc);
 129
 130         sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
 131
 132         device_printf(dev, " ");
 133         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
 134                 kprintf("no media present");
 135         else
 136                 mii_phy_add_media(sc);
 137         kprintf("\n");
 138
 139         MIIBUS_MEDIAINIT(sc->mii_dev);
 140         return (0);
 141 }
 142
 143 static int
 144 inphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 145 {
 146         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 147         int reg;
 148
 149         switch (cmd) {
 150         case MII_POLLSTAT:
 151                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 152                         return (0);
 153                 break;
 154
 155         case MII_MEDIACHG:
 156                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
 157                         reg = PHY_READ(sc, MII_BMCR);
 158                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
 159                         return (0);
 160                 }
 161
 162                 /*
 163                  * If the interface is not up, don't do anything.
 164                  */
 165                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 166                         break;
 167
 168                 mii_phy_set_media(sc);
 169                 break;
 170
 171         case MII_TICK:
 172                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 173                         return (0);
 174
 175                 if (mii_phy_tick(sc) == EJUSTRETURN)
 176                         return (0);
 177                 break;
 178         }
 179
 180         /* Update the media status. */
 181         inphy_status(sc);
 182
 183         /* Callback if something changed. */
 184         mii_phy_update(sc, cmd);
 185         return (0);
 186 }
 187
 188 static void
 189 inphy_status(struct mii_softc *sc)
 190 {
 191         struct mii_data *mii = sc->mii_pdata;
 192         int bmsr, bmcr, scr;
 193
 194         mii->mii_media_status = IFM_AVALID;
 195         mii->mii_media_active = IFM_ETHER;
 196
 197         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
 198         if (bmsr & BMSR_LINK)
 199                 mii->mii_media_status |= IFM_ACTIVE;
 200
 201         bmcr = PHY_READ(sc, MII_BMCR);
 202         if (bmcr & BMCR_ISO) {
 203                 mii->mii_media_active |= IFM_NONE;
 204                 mii->mii_media_status = 0;
 205                 return;
 206         }
 207
 208         if (bmcr & BMCR_LOOP)
 209                 mii->mii_media_active |= IFM_LOOP;
 210
 211         if (bmcr & BMCR_AUTOEN) {
 212                 if ((bmsr & BMSR_ACOMP) == 0) {
 213                         mii->mii_media_active |= IFM_NONE;
 214                         return;
 215                 }
 216
 217                 scr = PHY_READ(sc, MII_INPHY_SCR);
 218                 if ((bmsr & BMSR_100T4) && (scr & SCR_T4))
 219                         mii->mii_media_active |= IFM_100_T4;
 220                 else if (scr & SCR_S100)
 221                         mii->mii_media_active |= IFM_100_TX;
 222                 else
 223                         mii->mii_media_active |= IFM_10_T;
 224                 if (scr & SCR_FDX)
 225                         mii->mii_media_active |= IFM_FDX;
 226         } else {
 227                 mii->mii_media_active = mii->mii_media.ifm_cur->ifm_media;
 228         }
 229 }