1 /* $OpenBSD: amphy.c,v 1.18 2008/09/08 07:38:33 brad Exp $ */ 2 3 /* 4 * Copyright (c) 1997, 1998, 1999 5 * Bill Paul <wpaul@ee.columbia.edu>. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Bill Paul. 18 * 4. Neither the name of the author nor the names of any co-contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 * 34 * $FreeBSD: src/sys/dev/mii/amphy.c,v 1.3 2000/04/19 14:57:29 phk Exp $ 35 */ 36 37 /* 38 * driver for AMD AM79c873 PHYs 39 * This driver also works for the Davicom DM9101 PHY, which appears to 40 * be an AM79c873 workalike. 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 #include <sys/device.h> 47 #include <sys/socket.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 <dev/mii/miidevs.h> 55 56 #include <dev/mii/amphyreg.h> 57 58 int amphymatch(struct device *, void *, void *); 59 void amphyattach(struct device *, struct device *, void *); 60 61 struct cfattach amphy_ca = { 62 sizeof(struct mii_softc), amphymatch, amphyattach, mii_phy_detach, 63 mii_phy_activate 64 }; 65 66 struct cfdriver amphy_cd = { 67 NULL, "amphy", DV_DULL 68 }; 69 70 int amphy_service(struct mii_softc *, struct mii_data *, int); 71 void amphy_status(struct mii_softc *); 72 73 const struct mii_phy_funcs amphy_funcs = { 74 amphy_service, amphy_status, mii_phy_reset, 75 }; 76 77 static const struct mii_phydesc amphys[] = { 78 { MII_OUI_xxAMD, MII_MODEL_xxAMD_79C873, 79 MII_STR_xxAMD_79C873 }, 80 { MII_OUI_xxDAVICOM, MII_MODEL_xxDAVICOM_DM9101, 81 MII_STR_xxDAVICOM_DM9101 }, 82 { MII_OUI_DAVICOM, MII_MODEL_DAVICOM_DM9102, 83 MII_STR_DAVICOM_DM9102 }, 84 { MII_OUI_DAVICOM, MII_MODEL_DAVICOM_DM9601, 85 MII_STR_DAVICOM_DM9601 }, 86 { MII_OUI_xxALTIMA, MII_MODEL_AMD_79C875phy, 87 MII_STR_AMD_79C875phy }, 88 89 { 0, 0, 90 NULL }, 91 }; 92 93 int 94 amphymatch(struct device *parent, void *match, void *aux) 95 { 96 struct mii_attach_args *ma = aux; 97 98 if (mii_phy_match(ma, amphys) != NULL) 99 return (10); 100 101 return (0); 102 } 103 104 void 105 amphyattach(struct device *parent, struct device *self, void *aux) 106 { 107 struct mii_softc *sc = (struct mii_softc *)self; 108 struct mii_attach_args *ma = aux; 109 struct mii_data *mii = ma->mii_data; 110 const struct mii_phydesc *mpd; 111 112 mpd = mii_phy_match(ma, amphys); 113 printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 114 115 sc->mii_inst = mii->mii_instance; 116 sc->mii_phy = ma->mii_phyno; 117 sc->mii_funcs = &hy_funcs; 118 sc->mii_pdata = mii; 119 sc->mii_flags = ma->mii_flags; 120 121 sc->mii_flags |= MIIF_NOISOLATE; 122 123 PHY_RESET(sc); 124 125 sc->mii_capabilities = 126 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 127 if (sc->mii_capabilities & BMSR_MEDIAMASK) 128 mii_phy_add_media(sc); 129 } 130 131 int 132 amphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 133 { 134 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 135 int reg; 136 137 switch (cmd) { 138 case MII_POLLSTAT: 139 /* 140 * If we're not polling our PHY instance, just return. 141 */ 142 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 143 return (0); 144 break; 145 146 case MII_MEDIACHG: 147 /* 148 * If the media indicates a different PHY instance, 149 * isolate ourselves. 150 */ 151 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 152 reg = PHY_READ(sc, MII_BMCR); 153 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 154 return (0); 155 } 156 157 /* 158 * If the interface is not up, don't do anything. 159 */ 160 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 161 break; 162 163 mii_phy_setmedia(sc); 164 break; 165 166 case MII_TICK: 167 /* 168 * If we're not currently selected, just return. 169 */ 170 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 171 return (0); 172 173 if (mii_phy_tick(sc) == EJUSTRETURN) 174 return (0); 175 break; 176 case MII_DOWN: 177 mii_phy_down(sc); 178 return (0); 179 } 180 181 /* Update the media status. */ 182 mii_phy_status(sc); 183 184 /* Callback if something changed. */ 185 mii_phy_update(sc, cmd); 186 return (0); 187 } 188 189 void 190 amphy_status(struct mii_softc *sc) 191 { 192 struct mii_data *mii = sc->mii_pdata; 193 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 194 int bmsr, bmcr, par, anlpar; 195 196 mii->mii_media_status = IFM_AVALID; 197 mii->mii_media_active = IFM_ETHER; 198 199 bmsr = PHY_READ(sc, MII_BMSR) | 200 PHY_READ(sc, MII_BMSR); 201 if (bmsr & BMSR_LINK) 202 mii->mii_media_status |= IFM_ACTIVE; 203 204 bmcr = PHY_READ(sc, MII_BMCR); 205 if (bmcr & BMCR_ISO) { 206 mii->mii_media_active |= IFM_NONE; 207 mii->mii_media_status = 0; 208 return; 209 } 210 211 if (bmcr & BMCR_LOOP) 212 mii->mii_media_active |= IFM_LOOP; 213 214 if (bmcr & BMCR_AUTOEN) { 215 /* 216 * The PAR status bits are only valid if autonegotiation 217 * has completed (or it's disabled). 218 */ 219 if ((bmsr & BMSR_ACOMP) == 0) { 220 /* Erg, still trying, I guess... */ 221 mii->mii_media_active |= IFM_NONE; 222 return; 223 } 224 225 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 226 anlpar = PHY_READ(sc, MII_ANAR) & 227 PHY_READ(sc, MII_ANLPAR); 228 if (anlpar & ANLPAR_TX_FD) 229 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 230 else if (anlpar & ANLPAR_T4) 231 mii->mii_media_active |= IFM_100_T4|IFM_HDX; 232 else if (anlpar & ANLPAR_TX) 233 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 234 else if (anlpar & ANLPAR_10_FD) 235 mii->mii_media_active |= IFM_10_T|IFM_FDX; 236 else if (anlpar & ANLPAR_10) 237 mii->mii_media_active |= IFM_10_T|IFM_HDX; 238 else 239 mii->mii_media_active |= IFM_NONE; 240 return; 241 } 242 243 /* 244 * Link partner is not capable of autonegotiation. 245 */ 246 par = PHY_READ(sc, MII_AMPHY_DSCSR); 247 if (par & DSCSR_100FDX) 248 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 249 else if (par & DSCSR_100HDX) 250 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 251 else if (par & DSCSR_10FDX) 252 mii->mii_media_active |= IFM_10_T|IFM_FDX; 253 else if (par & DSCSR_10HDX) 254 mii->mii_media_active |= IFM_10_T|IFM_HDX; 255 } else 256 mii->mii_media_active = ife->ifm_media; 257 } 258