1 /*- 2 * Copyright (c) 1997, 1998, 1999 3 * Bill Paul <wpaul@ee.columbia.edu>. 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 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Bill Paul. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 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 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 /* 37 * driver for AMD AM79c873 PHYs 38 * This driver also works for Davicom DM910{1,2} PHYs, which appear 39 * to be AM79c873 workalikes. 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/module.h> 46 #include <sys/socket.h> 47 #include <sys/bus.h> 48 49 #include <net/if.h> 50 #include <net/if_media.h> 51 52 #include <dev/mii/mii.h> 53 #include <dev/mii/miivar.h> 54 #include "miidevs.h" 55 56 #include <dev/mii/amphyreg.h> 57 58 #include "miibus_if.h" 59 60 static int amphy_probe(device_t); 61 static int amphy_attach(device_t); 62 63 static device_method_t amphy_methods[] = { 64 /* device interface */ 65 DEVMETHOD(device_probe, amphy_probe), 66 DEVMETHOD(device_attach, amphy_attach), 67 DEVMETHOD(device_detach, mii_phy_detach), 68 DEVMETHOD(device_shutdown, bus_generic_shutdown), 69 DEVMETHOD_END 70 }; 71 72 static devclass_t amphy_devclass; 73 74 static driver_t amphy_driver = { 75 "amphy", 76 amphy_methods, 77 sizeof(struct mii_softc) 78 }; 79 80 DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, 0, 0); 81 82 static int amphy_service(struct mii_softc *, struct mii_data *, int); 83 static void amphy_status(struct mii_softc *); 84 85 static const struct mii_phydesc amphys[] = { 86 MII_PHY_DESC(xxDAVICOM, DM9102), 87 MII_PHY_DESC(xxDAVICOM, DM9101), 88 MII_PHY_DESC(yyDAVICOM, DM9101), 89 MII_PHY_END 90 }; 91 92 static const struct mii_phy_funcs amphy_funcs = { 93 amphy_service, 94 amphy_status, 95 mii_phy_reset 96 }; 97 98 static int 99 amphy_probe(device_t dev) 100 { 101 102 return (mii_phy_dev_probe(dev, amphys, BUS_PROBE_DEFAULT)); 103 } 104 105 static int 106 amphy_attach(device_t dev) 107 { 108 109 mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &hy_funcs, 1); 110 return (0); 111 } 112 113 static int 114 amphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 115 { 116 117 switch (cmd) { 118 case MII_POLLSTAT: 119 break; 120 121 case MII_MEDIACHG: 122 mii_phy_setmedia(sc); 123 break; 124 125 case MII_TICK: 126 if (mii_phy_tick(sc) == EJUSTRETURN) 127 return (0); 128 break; 129 } 130 131 /* Update the media status. */ 132 PHY_STATUS(sc); 133 134 /* Callback if something changed. */ 135 mii_phy_update(sc, cmd); 136 return (0); 137 } 138 139 static void 140 amphy_status(struct mii_softc *sc) 141 { 142 struct mii_data *mii = sc->mii_pdata; 143 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 144 int bmsr, bmcr, par, anlpar; 145 146 mii->mii_media_status = IFM_AVALID; 147 mii->mii_media_active = IFM_ETHER; 148 149 bmsr = PHY_READ(sc, MII_BMSR) | 150 PHY_READ(sc, MII_BMSR); 151 if (bmsr & BMSR_LINK) 152 mii->mii_media_status |= IFM_ACTIVE; 153 154 bmcr = PHY_READ(sc, MII_BMCR); 155 if (bmcr & BMCR_ISO) { 156 mii->mii_media_active |= IFM_NONE; 157 mii->mii_media_status = 0; 158 return; 159 } 160 161 if (bmcr & BMCR_LOOP) 162 mii->mii_media_active |= IFM_LOOP; 163 164 if (bmcr & BMCR_AUTOEN) { 165 /* 166 * The PAR status bits are only valid if autonegotiation 167 * has completed (or it's disabled). 168 */ 169 if ((bmsr & BMSR_ACOMP) == 0) { 170 /* Erg, still trying, I guess... */ 171 mii->mii_media_active |= IFM_NONE; 172 return; 173 } 174 175 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 176 anlpar = PHY_READ(sc, MII_ANAR) & 177 PHY_READ(sc, MII_ANLPAR); 178 if (anlpar & ANLPAR_TX_FD) 179 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 180 else if (anlpar & ANLPAR_T4) 181 mii->mii_media_active |= IFM_100_T4|IFM_HDX; 182 else if (anlpar & ANLPAR_TX) 183 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 184 else if (anlpar & ANLPAR_10_FD) 185 mii->mii_media_active |= IFM_10_T|IFM_FDX; 186 else if (anlpar & ANLPAR_10) 187 mii->mii_media_active |= IFM_10_T|IFM_HDX; 188 else 189 mii->mii_media_active |= IFM_NONE; 190 return; 191 } 192 193 /* 194 * Link partner is not capable of autonegotiation. 195 */ 196 par = PHY_READ(sc, MII_AMPHY_DSCSR); 197 if (par & DSCSR_100FDX) 198 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 199 else if (par & DSCSR_100HDX) 200 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 201 else if (par & DSCSR_10FDX) 202 mii->mii_media_active |= IFM_10_T|IFM_HDX; 203 else if (par & DSCSR_10HDX) 204 mii->mii_media_active |= IFM_10_T|IFM_HDX; 205 if ((mii->mii_media_active & IFM_FDX) != 0) 206 mii->mii_media_active |= mii_phy_flowstatus(sc); 207 } else 208 mii->mii_media_active = ife->ifm_media; 209 } 210