src/add-ons/kernel/drivers/network/3com/dev/mii/bmtphy.c

   1 /*-
   2  * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc.
   3  * All rights reserved.
   4  *
   5  * This code is derived from software contributed to The NetBSD Foundation
   6  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
   7  * NASA Ames Research Center.
   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  *
  18  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  20  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  21  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  22  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 /*
  32  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
  33  *
  34  * Redistribution and use in source and binary forms, with or without
  35  * modification, are permitted provided that the following conditions
  36  * are met:
  37  * 1. Redistributions of source code must retain the above copyright
  38  *    notice, this list of conditions and the following disclaimer.
  39  * 2. Redistributions in binary form must reproduce the above copyright
  40  *    notice, this list of conditions and the following disclaimer in the
  41  *    documentation and/or other materials provided with the distribution.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  44  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  45  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  46  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  47  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  48  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  49  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  50  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  51  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  52  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  53  *
  54  *      from: NetBSD: bmtphy.c,v 1.8 2002/07/03 06:25:50 simonb Exp
  55  *
  56  */
  57
  58 #include <sys/cdefs.h>
  59 __FBSDID("$FreeBSD$");
  60
  61 /*
  62  * Driver for the Broadcom BCM5201/BCM5202 "Mini-Theta" PHYs.  This also
  63  * drives the PHY on the 3Com 3c905C.  The 3c905C's PHY is described in
  64  * the 3c905C data sheet.
  65  */
  66
  67 #include <sys/param.h>
  68 #include <sys/systm.h>
  69 #include <sys/kernel.h>
  70 #include <sys/module.h>
  71 #include <sys/socket.h>
  72 #include <sys/bus.h>
  73
  74 #include <net/if.h>
  75 #include <net/if_media.h>
  76
  77 #include <dev/mii/mii.h>
  78 #include <dev/mii/miivar.h>
  79 #include "miidevs.h"
  80
  81 #include <dev/mii/bmtphyreg.h>
  82
  83 #include "miibus_if.h"
  84
  85 static int      bmtphy_probe(device_t);
  86 static int      bmtphy_attach(device_t);
  87
  88 static device_method_t bmtphy_methods[] = {
  89         /* Device interface */
  90         DEVMETHOD(device_probe,         bmtphy_probe),
  91         DEVMETHOD(device_attach,        bmtphy_attach),
  92         DEVMETHOD(device_detach,        mii_phy_detach),
  93         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  94         DEVMETHOD_END
  95 };
  96
  97 static devclass_t       bmtphy_devclass;
  98
  99 static driver_t bmtphy_driver = {
 100         "bmtphy",
 101         bmtphy_methods,
 102         sizeof(struct mii_softc)
 103 };
 104
 105 DRIVER_MODULE(bmtphy, miibus, bmtphy_driver, bmtphy_devclass, 0, 0);
 106
 107 static int      bmtphy_service(struct mii_softc *, struct mii_data *, int);
 108 static void     bmtphy_status(struct mii_softc *);
 109 static void     bmtphy_reset(struct mii_softc *);
 110
 111 static const struct mii_phydesc bmtphys_dp[] = {
 112         MII_PHY_DESC(xxBROADCOM, BCM4401),
 113         MII_PHY_DESC(xxBROADCOM, BCM5201),
 114         MII_PHY_DESC(xxBROADCOM, BCM5214),
 115         MII_PHY_DESC(xxBROADCOM, BCM5221),
 116         MII_PHY_DESC(xxBROADCOM, BCM5222),
 117         MII_PHY_END
 118 };
 119
 120 static const struct mii_phydesc bmtphys_lp[] = {
 121         MII_PHY_DESC(xxBROADCOM, 3C905B),
 122         MII_PHY_DESC(xxBROADCOM, 3C905C),
 123         MII_PHY_END
 124 };
 125
 126 static const struct mii_phy_funcs bmtphy_funcs = {
 127         bmtphy_service,
 128         bmtphy_status,
 129         bmtphy_reset
 130 };
 131
 132 static int
 133 bmtphy_probe(device_t dev)
 134 {
 135         int     rval;
 136
 137         /* Let exphy(4) take precedence for these. */
 138         rval = mii_phy_dev_probe(dev, bmtphys_lp, BUS_PROBE_LOW_PRIORITY);
 139         if (rval <= 0)
 140                 return (rval);
 141
 142         return (mii_phy_dev_probe(dev, bmtphys_dp, BUS_PROBE_DEFAULT));
 143 }
 144
 145 static int
 146 bmtphy_attach(device_t dev)
 147 {
 148
 149         mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &bmtphy_funcs, 1);
 150         return (0);
 151 }
 152
 153 static int
 154 bmtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 155 {
 156
 157         switch (cmd) {
 158         case MII_POLLSTAT:
 159                 break;
 160
 161         case MII_MEDIACHG:
 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_setmedia(sc);
 169                 break;
 170
 171         case MII_TICK:
 172                 if (mii_phy_tick(sc) == EJUSTRETURN)
 173                         return (0);
 174                 break;
 175         }
 176
 177         /* Update the media status. */
 178         PHY_STATUS(sc);
 179
 180         /* Callback if something changed. */
 181         mii_phy_update(sc, cmd);
 182         return (0);
 183 }
 184
 185 static void
 186 bmtphy_status(struct mii_softc *sc)
 187 {
 188         struct mii_data *mii;
 189         struct ifmedia_entry *ife;
 190         int bmsr, bmcr, aux_csr;
 191
 192         mii = sc->mii_pdata;
 193         ife = mii->mii_media.ifm_cur;
 194
 195         mii->mii_media_status = IFM_AVALID;
 196         mii->mii_media_active = IFM_ETHER;
 197
 198         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
 199
 200         if (bmsr & BMSR_LINK)
 201                 mii->mii_media_status |= IFM_ACTIVE;
 202
 203         bmcr = PHY_READ(sc, MII_BMCR);
 204         if (bmcr & BMCR_ISO) {
 205                 mii->mii_media_active |= IFM_NONE;
 206                 mii->mii_media_status = 0;
 207                 return;
 208         }
 209
 210         if (bmcr & BMCR_LOOP)
 211                 mii->mii_media_active |= IFM_LOOP;
 212
 213         if (bmcr & BMCR_AUTOEN) {
 214                 /*
 215                  * The media status bits are only valid if autonegotiation
 216                  * has completed (or it's disabled).
 217                  */
 218                 if ((bmsr & BMSR_ACOMP) == 0) {
 219                         /* Erg, still trying, I guess... */
 220                         mii->mii_media_active |= IFM_NONE;
 221                         return;
 222                 }
 223
 224                 aux_csr = PHY_READ(sc, MII_BMTPHY_AUX_CSR);
 225                 if (aux_csr & AUX_CSR_SPEED)
 226                         mii->mii_media_active |= IFM_100_TX;
 227                 else
 228                         mii->mii_media_active |= IFM_10_T;
 229                 if (aux_csr & AUX_CSR_FDX)
 230                         mii->mii_media_active |=
 231                             IFM_FDX | mii_phy_flowstatus(sc);
 232                 else
 233                         mii->mii_media_active |= IFM_HDX;
 234         } else
 235                 mii->mii_media_active = ife->ifm_media;
 236 }
 237
 238 static void
 239 bmtphy_reset(struct mii_softc *sc)
 240 {
 241         u_int16_t data;
 242
 243         mii_phy_reset(sc);
 244
 245         if (sc->mii_mpd_model == MII_MODEL_xxBROADCOM_BCM5221) {
 246                 /* Enable shadow register mode. */
 247                 data = PHY_READ(sc, 0x1f);
 248                 PHY_WRITE(sc, 0x1f, data | 0x0080);
 249
 250                 /* Enable APD (Auto PowerDetect). */
 251                 data = PHY_READ(sc, MII_BMTPHY_AUX2);
 252                 PHY_WRITE(sc, MII_BMTPHY_AUX2, data | 0x0020);
 253
 254                 /* Enable clocks across APD for Auto-MDIX functionality. */
 255                 data = PHY_READ(sc, MII_BMTPHY_INTR);
 256                 PHY_WRITE(sc, MII_BMTPHY_INTR, data | 0x0004);
 257
 258                 /* Disable shadow register mode. */
 259                 data = PHY_READ(sc, 0x1f);
 260                 PHY_WRITE(sc, 0x1f, data & ~0x0080);
 261         }
 262 }