1/*- 2 * Copyright (c) 2000,2001 Jonathan Chen. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions, and the following disclaimer, 10 * without modification, immediately at the beginning of the file. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in 13 * the documentation and/or other materials provided with the 14 * distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD$"); 31 32/* 33 * Driver for the TDK 78Q2120 MII 34 * 35 * References: 36 * Datasheet for the 78Q2120 - http://www.tsc.tdk.com/lan/78q2120.pdf 37 * Most of this code stolen from ukphy.c 38 */ 39 40/* 41 * The TDK 78Q2120 is found on some Xircom X3201 based CardBus cards, 42 * also spotted on some 3C575 cards. It's just like any other normal 43 * phy, except it does auto negotiation in a different way. 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 <dev/mii/mii.h> 58#include <dev/mii/miivar.h> 59#include "miidevs.h" 60 61#include <dev/mii/tdkphyreg.h> 62 63#include "miibus_if.h" 64 65static int tdkphy_probe(device_t); 66static int tdkphy_attach(device_t); 67 68static device_method_t tdkphy_methods[] = { 69 /* device interface */ 70 DEVMETHOD(device_probe, tdkphy_probe), 71 DEVMETHOD(device_attach, tdkphy_attach), 72 DEVMETHOD(device_detach, mii_phy_detach), 73 DEVMETHOD(device_shutdown, bus_generic_shutdown), 74 DEVMETHOD_END 75}; 76 77static devclass_t tdkphy_devclass; 78 79static driver_t tdkphy_driver = { 80 "tdkphy", 81 tdkphy_methods, 82 sizeof(struct mii_softc) 83}; 84 85DRIVER_MODULE(tdkphy, miibus, tdkphy_driver, tdkphy_devclass, 0, 0); 86 87static int tdkphy_service(struct mii_softc *, struct mii_data *, int); 88static void tdkphy_status(struct mii_softc *); 89 90static const struct mii_phydesc tdkphys[] = { 91 MII_PHY_DESC(xxTSC, 78Q2120), 92 MII_PHY_END 93}; 94 95static const struct mii_phy_funcs tdkphy_funcs = { 96 tdkphy_service, 97 tdkphy_status, 98 mii_phy_reset 99}; 100 101static int 102tdkphy_probe(device_t dev) 103{ 104 105 return (mii_phy_dev_probe(dev, tdkphys, BUS_PROBE_DEFAULT)); 106} 107 108static int 109tdkphy_attach(device_t dev) 110{ 111 112 mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &tdkphy_funcs, 1); 113 return (0); 114} 115 116static int 117tdkphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 118{ 119 120 switch (cmd) { 121 case MII_POLLSTAT: 122 break; 123 124 case MII_MEDIACHG: 125 /* 126 * If the interface is not up, don't do anything. 127 */ 128 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 129 break; 130 131 mii_phy_setmedia(sc); 132 break; 133 134 case MII_TICK: 135 if (mii_phy_tick(sc) == EJUSTRETURN) 136 return (0); 137 break; 138 } 139 140 /* Update the media status. */ 141 PHY_STATUS(sc); 142 if (sc->mii_pdata->mii_media_active & IFM_FDX) 143 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) | BMCR_FDX); 144 else 145 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) & ~BMCR_FDX); 146 147 /* Callback if something changed. */ 148 mii_phy_update(sc, cmd); 149 return (0); 150} 151 152static void 153tdkphy_status(struct mii_softc *phy) 154{ 155 struct mii_data *mii = phy->mii_pdata; 156 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 157 int bmsr, bmcr, anlpar, diag; 158 159 mii->mii_media_status = IFM_AVALID; 160 mii->mii_media_active = IFM_ETHER; 161 162 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 163 if (bmsr & BMSR_LINK) 164 mii->mii_media_status |= IFM_ACTIVE; 165 166 bmcr = PHY_READ(phy, MII_BMCR); 167 if (bmcr & BMCR_ISO) { 168 mii->mii_media_active |= IFM_NONE; 169 mii->mii_media_status = 0; 170 return; 171 } 172 173 if (bmcr & BMCR_LOOP) 174 mii->mii_media_active |= IFM_LOOP; 175 176 if (bmcr & BMCR_AUTOEN) { 177 /* 178 * NWay autonegotiation takes the highest-order common 179 * bit of the ANAR and ANLPAR (i.e. best media advertised 180 * both by us and our link partner). 181 */ 182 if ((bmsr & BMSR_ACOMP) == 0) { 183 /* Erg, still trying, I guess... */ 184 mii->mii_media_active |= IFM_NONE; 185 return; 186 } 187 188 anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR); 189 /* 190 * ANLPAR doesn't get set on my card, but we check it anyway, 191 * since it is mentioned in the 78Q2120 specs. 192 */ 193 if (anlpar & ANLPAR_TX_FD) 194 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 195 else if (anlpar & ANLPAR_T4) 196 mii->mii_media_active |= IFM_100_T4|IFM_HDX; 197 else if (anlpar & ANLPAR_TX) 198 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 199 else if (anlpar & ANLPAR_10_FD) 200 mii->mii_media_active |= IFM_10_T|IFM_FDX; 201 else if (anlpar & ANLPAR_10) 202 mii->mii_media_active |= IFM_10_T|IFM_HDX; 203 else { 204 /* 205 * ANLPAR isn't set, which leaves two possibilities: 206 * 1) Auto negotiation failed 207 * 2) Auto negotiation completed, but the card forgot 208 * to set ANLPAR. 209 * So we check the MII_DIAG(18) register... 210 */ 211 diag = PHY_READ(phy, MII_DIAG); 212 if (diag & DIAG_NEGFAIL) /* assume 10baseT if no neg */ 213 mii->mii_media_active |= IFM_10_T|IFM_HDX; 214 else { 215 if (diag & DIAG_DUPLEX) 216 mii->mii_media_active |= IFM_FDX; 217 else 218 mii->mii_media_active |= IFM_HDX; 219 if (diag & DIAG_RATE_100) 220 mii->mii_media_active |= IFM_100_TX; 221 else 222 mii->mii_media_active |= IFM_10_T; 223 } 224 } 225 if ((mii->mii_media_active & IFM_FDX) != 0) 226 mii->mii_media_active |= mii_phy_flowstatus(phy); 227 } else 228 mii->mii_media_active = ife->ifm_media; 229} 230