sys/dev/mii/qsphy.c

   1 /*      $NetBSD: qsphy.c,v 1.46 2008/11/17 03:04:27 dyoung Exp $        */
   2
   3 /*-
   4  * Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
   9  * NASA Ames Research Center.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 /*
  34  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  46  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  47  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  48  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  49  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  50  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  51  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  52  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  53  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  54  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  55  */
  56
  57 /*
  58  * driver for Quality Semiconductor's QS6612 ethernet 10/100 PHY
  59  * datasheet from www.qualitysemi.com
  60  */
  61
  62 #include <sys/cdefs.h>
  63 __KERNEL_RCSID(0, "$NetBSD: qsphy.c,v 1.46 2008/11/17 03:04:27 dyoung Exp $");
  64
  65 #include <sys/param.h>
  66 #include <sys/systm.h>
  67 #include <sys/kernel.h>
  68 #include <sys/device.h>
  69 #include <sys/socket.h>
  70
  71 #include <net/if.h>
  72 #include <net/if_media.h>
  73
  74 #include <dev/mii/mii.h>
  75 #include <dev/mii/miivar.h>
  76 #include <dev/mii/miidevs.h>
  77
  78 #include <dev/mii/qsphyreg.h>
  79
  80 static int      qsphymatch(device_t, cfdata_t, void *);
  81 static void     qsphyattach(device_t, device_t, void *);
  82
  83 CFATTACH_DECL_NEW(qsphy, sizeof(struct mii_softc),
  84     qsphymatch, qsphyattach, mii_phy_detach, mii_phy_activate);
  85
  86 static int      qsphy_service(struct mii_softc *, struct mii_data *, int);
  87 static void     qsphy_status(struct mii_softc *);
  88 static void     qsphy_reset(struct mii_softc *);
  89
  90 static const struct mii_phy_funcs qsphy_funcs = {
  91         qsphy_service, qsphy_status, qsphy_reset,
  92 };
  93
  94 static const struct mii_phydesc qsphys[] = {
  95         { MII_OUI_xxQUALSEMI,           MII_MODEL_xxQUALSEMI_QS6612,
  96           MII_STR_xxQUALSEMI_QS6612 },
  97
  98         { 0,                            0,
  99           NULL },
 100 };
 101
 102 static int
 103 qsphymatch(device_t parent, cfdata_t match, void *aux)
 104 {
 105         struct mii_attach_args *ma = aux;
 106
 107         if (mii_phy_match(ma, qsphys) != NULL)
 108                 return (10);
 109
 110         return (0);
 111 }
 112
 113 static void
 114 qsphyattach(device_t parent, device_t self, void *aux)
 115 {
 116         struct mii_softc *sc = device_private(self);
 117         struct mii_attach_args *ma = aux;
 118         struct mii_data *mii = ma->mii_data;
 119         const struct mii_phydesc *mpd;
 120
 121         mpd = mii_phy_match(ma, qsphys);
 122         aprint_naive(": Media interface\n");
 123         aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
 124
 125         sc->mii_dev = self;
 126         sc->mii_inst = mii->mii_instance;
 127         sc->mii_phy = ma->mii_phyno;
 128         sc->mii_funcs = &qsphy_funcs;
 129         sc->mii_pdata = mii;
 130         sc->mii_flags = ma->mii_flags;
 131         sc->mii_anegticks = MII_ANEGTICKS;
 132
 133         PHY_RESET(sc);
 134
 135         sc->mii_capabilities =
 136             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
 137         aprint_normal_dev(self, "");
 138         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
 139                 aprint_error("no media present");
 140         else
 141                 mii_phy_add_media(sc);
 142         aprint_normal("\n");
 143 }
 144
 145 static int
 146 qsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 147 {
 148         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 149         int reg;
 150
 151         switch (cmd) {
 152         case MII_POLLSTAT:
 153                 /*
 154                  * If we're not polling our PHY instance, just return.
 155                  */
 156                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 157                         return (0);
 158                 break;
 159
 160         case MII_MEDIACHG:
 161                 /*
 162                  * If the media indicates a different PHY instance,
 163                  * isolate ourselves.
 164                  */
 165                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
 166                         reg = PHY_READ(sc, MII_BMCR);
 167                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
 168                         return (0);
 169                 }
 170
 171                 /*
 172                  * If the interface is not up, don't do anything.
 173                  */
 174                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 175                         break;
 176
 177                 mii_phy_setmedia(sc);
 178                 break;
 179
 180         case MII_TICK:
 181                 /*
 182                  * If we're not currently selected, just return.
 183                  */
 184                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 185                         return (0);
 186
 187                 if (mii_phy_tick(sc) == EJUSTRETURN)
 188                         return (0);
 189                 break;
 190
 191         case MII_DOWN:
 192                 mii_phy_down(sc);
 193                 return (0);
 194         }
 195
 196         /* Update the media status. */
 197         mii_phy_status(sc);
 198
 199         /* Callback if something changed. */
 200         mii_phy_update(sc, cmd);
 201         return (0);
 202 }
 203
 204 static void
 205 qsphy_status(struct mii_softc *sc)
 206 {
 207         struct mii_data *mii = sc->mii_pdata;
 208         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 209         int bmsr, bmcr, pctl;
 210
 211         mii->mii_media_status = IFM_AVALID;
 212         mii->mii_media_active = IFM_ETHER;
 213
 214         bmsr = PHY_READ(sc, MII_BMSR) |
 215             PHY_READ(sc, MII_BMSR);
 216         if (bmsr & BMSR_LINK)
 217                 mii->mii_media_status |= IFM_ACTIVE;
 218
 219         bmcr = PHY_READ(sc, MII_BMCR);
 220         if (bmcr & BMCR_ISO) {
 221                 mii->mii_media_active |= IFM_NONE;
 222                 mii->mii_media_status = 0;
 223                 return;
 224         }
 225
 226         if (bmcr & BMCR_LOOP)
 227                 mii->mii_media_active |= IFM_LOOP;
 228
 229         if (bmcr & BMCR_AUTOEN) {
 230                 if ((bmsr & BMSR_ACOMP) == 0) {
 231                         /* Erg, still trying, I guess... */
 232                         mii->mii_media_active |= IFM_NONE;
 233                         return;
 234                 }
 235                 pctl = PHY_READ(sc, MII_QSPHY_PCTL) |
 236                     PHY_READ(sc, MII_QSPHY_PCTL);
 237                 switch (pctl & PCTL_OPMASK) {
 238                 case PCTL_10_T:
 239                         mii->mii_media_active |= IFM_10_T;
 240                         break;
 241                 case PCTL_10_T_FDX:
 242                         mii->mii_media_active |= IFM_10_T|IFM_FDX;
 243                         break;
 244                 case PCTL_100_TX:
 245                         mii->mii_media_active |= IFM_100_TX;
 246                         break;
 247                 case PCTL_100_TX_FDX:
 248                         mii->mii_media_active |= IFM_100_TX|IFM_FDX;
 249                         break;
 250                 case PCTL_100_T4:
 251                         mii->mii_media_active |= IFM_100_T4;
 252                         break;
 253                 default:
 254                         /* Erg... this shouldn't happen. */
 255                         mii->mii_media_active |= IFM_NONE;
 256                         break;
 257                 }
 258         } else
 259                 mii->mii_media_active = ife->ifm_media;
 260 }
 261
 262 static void
 263 qsphy_reset(struct mii_softc *sc)
 264 {
 265
 266         mii_phy_reset(sc);
 267         PHY_WRITE(sc, MII_QSPHY_IMASK, 0);
 268 }