sys/dev/netif/mii_layer/lxtphy.c

   1 /*      $OpenBSD: lxtphy.c,v 1.14 2005/02/19 06:00:04 brad Exp $        */
   2 /*      NetBSD: lxtphy.c,v 1.19 2000/02/02 23:34:57 thorpej Exp         */
   3
   4 /*-
   5  * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
   6  * All rights reserved.
   7  *
   8  * This code is derived from software contributed to The NetBSD Foundation
   9  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
  10  * NASA Ames Research Center.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. All advertising materials mentioning features or use of this software
  21  *    must display the following acknowledgement:
  22  *      This product includes software developed by the NetBSD
  23  *      Foundation, Inc. and its contributors.
  24  * 4. Neither the name of The NetBSD Foundation nor the names of its
  25  *    contributors may be used to endorse or promote products derived
  26  *    from this software without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  29  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  30  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  31  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  32  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  33  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  34  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  35  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  36  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  37  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  38  * POSSIBILITY OF SUCH DAMAGE.
  39  *
  40  * $FreeBSD: src/sys/dev/mii/lxtphy.c,v 1.1.2.1 2001/06/08 19:58:33 semenu Exp $
  41  * $DragonFly: src/sys/dev/netif/mii_layer/lxtphy.c,v 1.10 2006/12/22 23:26:20 swildner Exp $
  42  */
  43
  44 /*
  45  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
  46  *
  47  * Redistribution and use in source and binary forms, with or without
  48  * modification, are permitted provided that the following conditions
  49  * are met:
  50  * 1. Redistributions of source code must retain the above copyright
  51  *    notice, this list of conditions and the following disclaimer.
  52  * 2. Redistributions in binary form must reproduce the above copyright
  53  *    notice, this list of conditions and the following disclaimer in the
  54  *    documentation and/or other materials provided with the distribution.
  55  * 3. All advertising materials mentioning features or use of this software
  56  *    must display the following acknowledgement:
  57  *      This product includes software developed by Manuel Bouyer.
  58  * 4. The name of the author may not be used to endorse or promote products
  59  *    derived from this software without specific prior written permission.
  60  *
  61  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  62  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  63  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  64  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  65  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  66  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  67  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  68  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  69  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  70  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  71  */
  72
  73 /*
  74  * driver for Level One's LXT-970/LXT-971 ethernet 10/100 PHY
  75  * datasheet from www.level1.com
  76  */
  77
  78 #include <sys/param.h>
  79 #include <sys/systm.h>
  80 #include <sys/kernel.h>
  81 #include <sys/socket.h>
  82 #include <sys/errno.h>
  83 #include <sys/module.h>
  84 #include <sys/bus.h>
  85
  86 #include <net/if.h>
  87 #include <net/if_media.h>
  88
  89 #include "mii.h"
  90 #include "miivar.h"
  91 #include "miidevs.h"
  92
  93 #include "lxtphyreg.h"
  94
  95 #include "miibus_if.h"
  96
  97 static int      lxtphy_probe(device_t);
  98 static int      lxtphy_attach(device_t);
  99
 100 static int      lxtphy_service(struct mii_softc *, struct mii_data *, int);
 101 static void     lxtphy_status(struct mii_softc *);
 102 static void     lxtphy_reset(struct mii_softc *);
 103 static void     lxtphy_set_tp(struct mii_softc *);
 104 static void     lxtphy_set_fx(struct mii_softc *);
 105
 106 static device_method_t lxtphy_methods[] = {
 107         /* device interface */
 108         DEVMETHOD(device_probe,         lxtphy_probe),
 109         DEVMETHOD(device_attach,        lxtphy_attach),
 110         DEVMETHOD(device_detach,        ukphy_detach),
 111         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
 112         { 0, 0 }
 113 };
 114
 115 static const struct mii_phydesc lxtphys[] = {
 116         MII_PHYDESC_ARG(xxLEVEL1,       LXT970, lxtphy_status),
 117         MII_PHYDESC_ARG(xxLEVEL1a,      LXT971, ukphy_status),
 118         MII_PHYDESC_NULL
 119 };
 120
 121 static devclass_t lxtphy_devclass;
 122
 123 static driver_t lxtphy_driver = {
 124         "lxtphy",
 125         lxtphy_methods,
 126         sizeof(struct mii_softc)
 127 };
 128
 129 DRIVER_MODULE(lxtphy, miibus, lxtphy_driver, lxtphy_devclass, 0, 0);
 130
 131 static int
 132 lxtphy_probe(device_t dev)
 133 {
 134         struct mii_attach_args *ma = device_get_ivars(dev);
 135         const struct mii_phydesc *mpd;
 136
 137         mpd = mii_phy_match(ma, lxtphys);
 138         if (mpd != NULL) {
 139                 struct mii_softc *sc = device_get_softc(dev);
 140
 141                 sc->mii_status = mpd->mpd_priv;
 142                 device_set_desc(dev, mpd->mpd_name);
 143                 return (0);
 144         }
 145         return (ENXIO);
 146 }
 147
 148 static int
 149 lxtphy_attach(device_t dev)
 150 {
 151         struct mii_softc *sc;
 152         struct mii_attach_args *ma;
 153         struct mii_data *mii;
 154
 155         sc = device_get_softc(dev);
 156         ma = device_get_ivars(dev);
 157         mii_softc_init(sc, ma);
 158         sc->mii_dev = device_get_parent(dev);
 159         mii = device_get_softc(sc->mii_dev);
 160         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
 161
 162         sc->mii_inst = mii->mii_instance;
 163         sc->mii_service = lxtphy_service;
 164         sc->mii_reset = lxtphy_reset;
 165         sc->mii_pdata = mii;
 166         sc->mii_flags |= MIIF_NOISOLATE;
 167
 168         lxtphy_reset(sc);
 169
 170         mii->mii_instance++;
 171
 172 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
 173         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
 174             MII_MEDIA_NONE);
 175 #undef ADD
 176
 177         sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
 178
 179         device_printf(dev, " ");
 180         if (sc->mii_capabilities & BMSR_MEDIAMASK)
 181                 mii_phy_add_media(sc);
 182         else
 183                 kprintf("no media present");
 184         kprintf("\n");
 185
 186         MIIBUS_MEDIAINIT(sc->mii_dev);
 187         return(0);
 188 }
 189
 190 static int
 191 lxtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 192 {
 193         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 194         int reg;
 195
 196         switch (cmd) {
 197         case MII_POLLSTAT:
 198                 /*
 199                  * If we're not polling our PHY instance, just return.
 200                  */
 201                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 202                         return (0);
 203                 break;
 204
 205         case MII_MEDIACHG:
 206                 /*
 207                  * If the media indicates a different PHY instance,
 208                  * isolate ourselves.
 209                  */
 210                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
 211                         reg = PHY_READ(sc, MII_BMCR);
 212                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
 213                         return (0);
 214                 }
 215
 216                 /*
 217                  * If the interface is not up, don't do anything.
 218                  */
 219                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 220                         break;
 221
 222                 if (IFM_SUBTYPE(ife->ifm_media) == IFM_100_FX)
 223                         lxtphy_set_fx(sc);
 224                 else
 225                         lxtphy_set_tp(sc);
 226
 227                 mii_phy_set_media(sc);
 228                 break;
 229
 230         case MII_TICK:
 231                 /*
 232                  * If we're not currently selected, just return.
 233                  */
 234                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 235                         return (0);
 236
 237                 if (mii_phy_tick(sc) == EJUSTRETURN)
 238                         return (0);
 239                 break;
 240         }
 241
 242         /* Update the media status. */
 243         sc->mii_status(sc);
 244
 245         /* Callback if something changed. */
 246         mii_phy_update(sc, cmd);
 247         return (0);
 248 }
 249
 250 static void
 251 lxtphy_status(struct mii_softc *sc)
 252 {
 253         struct mii_data *mii = sc->mii_pdata;
 254         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 255         int bmcr, bmsr, csr;
 256
 257         mii->mii_media_status = IFM_AVALID;
 258         mii->mii_media_active = IFM_ETHER;
 259
 260         /*
 261          * Get link status from the CSR; we need to read the CSR
 262          * for media type anyhow, and the link status in the CSR
 263          * doens't latch, so fewer register reads are required.
 264          */
 265         csr = PHY_READ(sc, MII_LXTPHY_CSR);
 266         if (csr & CSR_LINK)
 267                 mii->mii_media_status |= IFM_ACTIVE;
 268
 269         bmcr = PHY_READ(sc, MII_BMCR);
 270         if (bmcr & BMCR_ISO) {
 271                 mii->mii_media_active |= IFM_NONE;
 272                 mii->mii_media_status = 0;
 273                 return;
 274         }
 275
 276         if (bmcr & BMCR_LOOP)
 277                 mii->mii_media_active |= IFM_LOOP;
 278
 279         if (bmcr & BMCR_AUTOEN) {
 280                 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
 281                 if ((bmsr & BMSR_ACOMP) == 0) {
 282                         /* Erg, still trying, I guess... */
 283                         mii->mii_media_active |= IFM_NONE;
 284                         return;
 285                 }
 286                 if (csr & CSR_SPEED)
 287                         mii->mii_media_active |= IFM_100_TX;
 288                 else
 289                         mii->mii_media_active |= IFM_10_T;
 290                 if (csr & CSR_DUPLEX)
 291                         mii->mii_media_active |= IFM_FDX;
 292         } else
 293                 mii->mii_media_active = ife->ifm_media;
 294 }
 295
 296 static void
 297 lxtphy_set_tp(struct mii_softc *sc)
 298 {
 299         int cfg;
 300
 301         cfg = PHY_READ(sc, MII_LXTPHY_CONFIG);
 302         cfg &= ~CONFIG_100BASEFX;
 303         PHY_WRITE(sc, MII_LXTPHY_CONFIG, cfg);
 304 }
 305
 306 static void
 307 lxtphy_set_fx(struct mii_softc *sc)
 308 {
 309         int cfg;
 310
 311         cfg = PHY_READ(sc, MII_LXTPHY_CONFIG);
 312         cfg |= CONFIG_100BASEFX;
 313         PHY_WRITE(sc, MII_LXTPHY_CONFIG, cfg);
 314 }
 315
 316 static void
 317 lxtphy_reset(struct mii_softc *sc)
 318 {
 319         mii_phy_reset(sc);
 320 #if 0
 321         PHY_WRITE(sc, MII_LXTPHY_IER,
 322                   PHY_READ(sc, MII_LXTPHY_IER) & ~IER_INTEN);
 323 #endif
 324 }