sys/dev/netif/mii_layer/nsgphy.c

   1 /*
   2  * Copyright (c) 2001 Wind River Systems
   3  * Copyright (c) 2001
   4  *      Bill Paul <wpaul@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/nsgphy.c,v 1.1.2.3 2002/11/08 21:53:49 semenu Exp $
  34  * $DragonFly: src/sys/dev/netif/mii_layer/nsgphy.c,v 1.15 2008/07/22 10:59:16 sephe Exp $
  35  */
  36
  37 /*
  38  * Driver for the National Semiconductor DP83891 and DP83861
  39  * 10/100/1000 PHYs.
  40  * Datasheet available at: http://www.national.com/ds/DP/DP83861.pdf
  41  *
  42  * The DP83891 is the older NatSemi gigE PHY which isn't being sold
  43  * anymore. The DP83861 is its replacement, which is an 'enhanced'
  44  * firmware driven component. The major difference between the
  45  * two is that the 83891 can't generate interrupts, while the
  46  * 83861 can. (I think it wasn't originally designed to do this, but
  47  * it can now thanks to firmware updates.) The 83861 also allows
  48  * access to its internal RAM via indirect register access.
  49  */
  50
  51 #include <sys/param.h>
  52 #include <sys/systm.h>
  53 #include <sys/kernel.h>
  54 #include <sys/socket.h>
  55 #include <sys/bus.h>
  56
  57 #include <machine/clock.h>
  58
  59 #include <net/if.h>
  60 #include <net/if_media.h>
  61
  62 #include "mii.h"
  63 #include "miivar.h"
  64 #include "miidevs.h"
  65
  66 #include "nsgphyreg.h"
  67
  68 #include "miibus_if.h"
  69
  70 static int nsgphy_probe         (device_t);
  71 static int nsgphy_attach        (device_t);
  72
  73 static device_method_t nsgphy_methods[] = {
  74         /* device interface */
  75         DEVMETHOD(device_probe,         nsgphy_probe),
  76         DEVMETHOD(device_attach,        nsgphy_attach),
  77         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  78         { 0, 0 }
  79 };
  80
  81 static const struct mii_phydesc nsgphys[] = {
  82         MII_PHYDESC(NATSEMI,    DP83891),
  83         MII_PHYDESC(NATSEMI,    DP83861),
  84         MII_PHYDESC_NULL
  85 };
  86
  87 static devclass_t nsgphy_devclass;
  88
  89 static driver_t nsgphy_driver = {
  90         "nsgphy",
  91         nsgphy_methods,
  92         sizeof(struct mii_softc)
  93 };
  94
  95 DRIVER_MODULE(nsgphy, miibus, nsgphy_driver, nsgphy_devclass, 0, 0);
  96
  97 static int      nsgphy_service(struct mii_softc *, struct mii_data *, int);
  98 static void     nsgphy_status(struct mii_softc *);
  99
 100 static int
 101 nsgphy_probe(device_t dev)
 102 {
 103         struct mii_attach_args *ma = device_get_ivars(dev);
 104         const struct mii_phydesc *mpd;
 105
 106         mpd = mii_phy_match(ma, nsgphys);
 107         if (mpd != NULL) {
 108                 device_set_desc(dev, mpd->mpd_name);
 109                 return (0);
 110         }
 111         return(ENXIO);
 112 }
 113
 114 static int
 115 nsgphy_attach(device_t dev)
 116 {
 117         struct mii_softc *sc;
 118         struct mii_attach_args *ma;
 119         struct mii_data *mii;
 120
 121         sc = device_get_softc(dev);
 122         ma = device_get_ivars(dev);
 123         mii_softc_init(sc, ma);
 124         sc->mii_dev = device_get_parent(dev);
 125         mii = device_get_softc(sc->mii_dev);
 126         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
 127
 128         sc->mii_inst = mii->mii_instance;
 129         sc->mii_service = nsgphy_service;
 130         /*
 131          * Only retry autonegotiation every 17 seconds.
 132          * Actually, for gigE PHYs, we should wait longer, since
 133          * 5 seconds is the mimimum time the documentation
 134          * says to wait for a 1000mbps link to be established.
 135          */
 136         sc->mii_anegticks = 17;
 137         sc->mii_pdata = mii;
 138
 139         sc->mii_flags |= MIIF_NOISOLATE;
 140         mii->mii_instance++;
 141
 142 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
 143
 144         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
 145             MII_MEDIA_NONE);
 146 #if 0
 147         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
 148             MII_MEDIA_100_TX);
 149 #endif
 150
 151         mii_phy_reset(sc);
 152
 153         sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
 154         if (sc->mii_capabilities & BMSR_EXTSTAT)
 155                 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
 156
 157         device_printf(dev, " ");
 158         if ((sc->mii_capabilities & BMSR_MEDIAMASK) ||
 159             (sc->mii_extcapabilities & EXTSR_MEDIAMASK))
 160                 mii_phy_add_media(sc);
 161         else
 162                 kprintf("no media present");
 163
 164         kprintf("\n");
 165 #undef ADD
 166
 167         MIIBUS_MEDIAINIT(sc->mii_dev);
 168         return(0);
 169 }
 170
 171 int
 172 nsgphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 173 {
 174         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 175         int reg;
 176
 177         switch (cmd) {
 178         case MII_POLLSTAT:
 179                 /*
 180                  * If we're not polling our PHY instance, just return.
 181                  */
 182                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 183                         return (0);
 184                 break;
 185
 186         case MII_MEDIACHG:
 187                 /*
 188                  * If the media indicates a different PHY instance,
 189                  * isolate ourselves.
 190                  */
 191                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
 192                         reg = PHY_READ(sc, MII_BMCR);
 193                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
 194                         return (0);
 195                 }
 196
 197                 /*
 198                  * If the interface is not up, don't do anything.
 199                  */
 200                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 201                         break;
 202
 203                 mii_phy_set_media(sc);
 204                 break;
 205
 206         case MII_TICK:
 207                 /*
 208                  * If we're not currently selected, just return.
 209                  */
 210                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 211                         return (0);
 212
 213                 if (mii_phy_tick(sc) == EJUSTRETURN)
 214                         return (0);
 215                 break;
 216         }
 217
 218         /* Update the media status. */
 219         nsgphy_status(sc);
 220
 221         /* Callback if something changed. */
 222         mii_phy_update(sc, cmd);
 223         return (0);
 224 }
 225
 226 static void
 227 nsgphy_status(struct mii_softc *sc)
 228 {
 229         struct mii_data *mii = sc->mii_pdata;
 230         int bmsr, bmcr, physup, anlpar, gstat;
 231
 232         mii->mii_media_status = IFM_AVALID;
 233         mii->mii_media_active = IFM_ETHER;
 234
 235         bmsr = PHY_READ(sc, NSGPHY_MII_BMSR);
 236         physup = PHY_READ(sc, NSGPHY_MII_PHYSUP);
 237         if (physup & NSGPHY_PHYSUP_LNKSTS)
 238                 mii->mii_media_status |= IFM_ACTIVE;
 239
 240         bmcr = PHY_READ(sc, NSGPHY_MII_BMCR);
 241
 242         if (bmcr & NSGPHY_BMCR_LOOP)
 243                 mii->mii_media_active |= IFM_LOOP;
 244
 245         if (bmcr & NSGPHY_BMCR_AUTOEN) {
 246                 if ((bmsr & NSGPHY_BMSR_ACOMP) == 0) {
 247                         /* Erg, still trying, I guess... */
 248                         mii->mii_media_active |= IFM_NONE;
 249                         return;
 250                 }
 251                 anlpar = PHY_READ(sc, NSGPHY_MII_ANLPAR);
 252                 gstat = PHY_READ(sc, NSGPHY_MII_1000STS);
 253                 if (gstat & NSGPHY_1000STS_LPFD)
 254                         mii->mii_media_active |= IFM_1000_T | IFM_FDX;
 255                 else if (gstat & NSGPHY_1000STS_LPHD)
 256                         mii->mii_media_active |= IFM_1000_T | IFM_HDX;
 257                 else if (anlpar & NSGPHY_ANLPAR_100T4)
 258                         mii->mii_media_active |= IFM_100_T4;
 259                 else if (anlpar & NSGPHY_ANLPAR_100FDX)
 260                         mii->mii_media_active |= IFM_100_TX|IFM_FDX;
 261                 else if (anlpar & NSGPHY_ANLPAR_100HDX)
 262                         mii->mii_media_active |= IFM_100_TX;
 263                 else if (anlpar & NSGPHY_ANLPAR_10FDX)
 264                         mii->mii_media_active |= IFM_10_T|IFM_FDX;
 265                 else if (anlpar & NSGPHY_ANLPAR_10HDX)
 266                         mii->mii_media_active |= IFM_10_T|IFM_HDX;
 267                 else
 268                         mii->mii_media_active |= IFM_NONE;
 269                 return;
 270         }
 271
 272         switch(bmcr & (NSGPHY_BMCR_SPD1|NSGPHY_BMCR_SPD0)) {
 273         case NSGPHY_S1000:
 274                 mii->mii_media_active |= IFM_1000_T;
 275                 break;
 276         case NSGPHY_S100:
 277                 mii->mii_media_active |= IFM_100_TX;
 278                 break;
 279         case NSGPHY_S10:
 280                 mii->mii_media_active |= IFM_10_T;
 281                 break;
 282         default:
 283                 break;
 284         }
 285
 286         if (bmcr & NSGPHY_BMCR_FDX)
 287                 mii->mii_media_active |= IFM_FDX;
 288         else
 289                 mii->mii_media_active |= IFM_HDX;
 290 }