sys/dev/netif/mii_layer/pnaphy.c

   1 /*
   2  * Copyright (c) 2000 Berkeley Software Design, Inc.
   3  * Copyright (c) 1997, 1998, 1999, 2000
   4  *      Bill Paul <wpaul@osd.bsdi.com>.  All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. All advertising materials mentioning features or use of this software
  15  *    must display the following acknowledgement:
  16  *      This product includes software developed by Bill Paul.
  17  * 4. Neither the name of the author nor the names of any co-contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
  25  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  31  * THE POSSIBILITY OF SUCH DAMAGE.
  32  *
  33  * $FreeBSD: src/sys/dev/mii/pnaphy.c,v 1.1.2.3 2002/11/08 21:53:49 semenu Exp $
  34  * $DragonFly: src/sys/dev/netif/mii_layer/pnaphy.c,v 1.11 2006/12/22 23:26:20 swildner Exp $
  35  */
  36
  37 /*
  38  * driver for homePNA PHYs
  39  * This is really just a stub that allows us to identify homePNA-based
  40  * transceicers and display the link status. MII-based homePNA PHYs
  41  * only support one media type and no autonegotiation. If we were
  42  * really clever, we could tweak some of the vendor-specific registers
  43  * to optimize the link.
  44  */
  45
  46 #include <sys/param.h>
  47 #include <sys/systm.h>
  48 #include <sys/kernel.h>
  49 #include <sys/socket.h>
  50 #include <sys/errno.h>
  51 #include <sys/module.h>
  52 #include <sys/bus.h>
  53
  54 #include <net/if.h>
  55 #include <net/if_media.h>
  56
  57 #include <machine/clock.h>
  58
  59 #include "mii.h"
  60 #include "miivar.h"
  61 #include "miidevs.h"
  62
  63 #include "miibus_if.h"
  64
  65 static int pnaphy_probe         (device_t);
  66 static int pnaphy_attach        (device_t);
  67
  68 static device_method_t pnaphy_methods[] = {
  69         /* device interface */
  70         DEVMETHOD(device_probe,         pnaphy_probe),
  71         DEVMETHOD(device_attach,        pnaphy_attach),
  72         DEVMETHOD(device_detach,        ukphy_detach),
  73         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  74         { 0, 0 }
  75 };
  76
  77 static const struct mii_phydesc pnaphys[] = {
  78         MII_PHYDESC(AMD,        79c978),
  79         MII_PHYDESC_NULL
  80 };
  81
  82 static devclass_t pnaphy_devclass;
  83
  84 static driver_t pnaphy_driver = {
  85         "pnaphy",
  86         pnaphy_methods,
  87         sizeof(struct mii_softc)
  88 };
  89
  90 DRIVER_MODULE(pnaphy, miibus, pnaphy_driver, pnaphy_devclass, 0, 0);
  91
  92 static int      pnaphy_service(struct mii_softc *, struct mii_data *, int);
  93
  94 static int
  95 pnaphy_probe(device_t dev)
  96 {
  97         struct mii_attach_args *ma = device_get_ivars(dev);
  98         const struct mii_phydesc *mpd;
  99
 100         mpd = mii_phy_match(ma, pnaphys);
 101         if (mpd != NULL) {
 102                 device_set_desc(dev, mpd->mpd_name);
 103                 return (0);
 104         }
 105         return(ENXIO);
 106 }
 107
 108 static int
 109 pnaphy_attach(device_t dev)
 110 {
 111         struct mii_softc *sc;
 112         struct mii_attach_args *ma;
 113         struct mii_data *mii;
 114
 115         sc = device_get_softc(dev);
 116         ma = device_get_ivars(dev);
 117         mii_softc_init(sc, ma);
 118         sc->mii_dev = device_get_parent(dev);
 119         mii = device_get_softc(sc->mii_dev);
 120         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
 121
 122         sc->mii_inst = mii->mii_instance;
 123         sc->mii_service = pnaphy_service;
 124         sc->mii_pdata = mii;
 125
 126         mii->mii_instance++;
 127
 128         sc->mii_flags |= MIIF_NOISOLATE |
 129                          MIIF_IS_HPNA;          /* force HomePNA */
 130
 131         mii_phy_reset(sc);
 132
 133         sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
 134
 135         device_printf(dev, " ");
 136         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
 137                 kprintf("no media present");
 138         else
 139                 mii_phy_add_media(sc);
 140         kprintf("\n");
 141
 142 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
 143         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
 144             MII_MEDIA_NONE);
 145 #undef ADD
 146
 147         MIIBUS_MEDIAINIT(sc->mii_dev);
 148         return(0);
 149 }
 150
 151 static int
 152 pnaphy_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                 switch (IFM_SUBTYPE(ife->ifm_media)) {
 184                 case IFM_AUTO:
 185                 case IFM_10_T:
 186                 case IFM_100_TX:
 187                 case IFM_100_T4:
 188                         return (EINVAL);
 189                 default:
 190                         mii_phy_set_media(sc);
 191                 }
 192                 break;
 193
 194         case MII_TICK:
 195                 /*
 196                  * If we're not currently selected, just return.
 197                  */
 198                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 199                         return (0);
 200
 201                 if (mii_phy_tick(sc) == EJUSTRETURN)
 202                         return (0);
 203                 break;
 204         }
 205
 206         /* Update the media status. */
 207         ukphy_status(sc);
 208         if (IFM_SUBTYPE(mii->mii_media_active) == IFM_10_T)
 209                 mii->mii_media_active = IFM_ETHER | IFM_HPNA_1;
 210
 211         /* Callback if something changed. */
 212         mii_phy_update(sc, cmd);
 213         return (0);
 214 }