1 /* $NetBSD: amhphy.c,v 1.2 2001/08/25 18:04:01 thorpej Exp $ */ 2 3 /* 4 * Copyright 2001 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Driver for the 10BASE-T portion of the AMD Am79c901 PHY. 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/device.h> 46 #include <sys/malloc.h> 47 #include <sys/socket.h> 48 #include <sys/errno.h> 49 50 #include <net/if.h> 51 #include <net/if_media.h> 52 53 #include <dev/mii/mii.h> 54 #include <dev/mii/miivar.h> 55 #include <dev/mii/miidevs.h> 56 57 #include <dev/mii/amhphyreg.h> 58 59 int amhphymatch(struct device *, struct cfdata *, void *); 60 void amhphyattach(struct device *, struct device *, void *); 61 62 struct cfattach amhphy_ca = { 63 sizeof(struct mii_softc), amhphymatch, amhphyattach, 64 mii_phy_detach, mii_phy_activate 65 }; 66 67 int amhphy_service(struct mii_softc *, struct mii_data *, int); 68 void amhphy_status(struct mii_softc *); 69 70 const struct mii_phy_funcs amhphy_funcs = { 71 amhphy_service, amhphy_status, mii_phy_reset, 72 }; 73 74 const struct mii_phydesc amhphys[] = { 75 { MII_OUI_yyAMD, MII_MODEL_yyAMD_79c901, 76 MII_STR_yyAMD_79c901 }, 77 78 { 0, 0, 79 NULL }, 80 }; 81 82 int 83 amhphymatch(struct device *parent, struct cfdata *match, void *aux) 84 { 85 struct mii_attach_args *ma = aux; 86 87 if (mii_phy_match(ma, amhphys) != NULL) 88 return (10); 89 90 return (0); 91 } 92 93 void 94 amhphyattach(struct device *parent, struct device *self, void *aux) 95 { 96 struct mii_softc *sc = (struct mii_softc *)self; 97 struct mii_attach_args *ma = aux; 98 struct mii_data *mii = ma->mii_data; 99 const struct mii_phydesc *mpd; 100 101 mpd = mii_phy_match(ma, amhphys); 102 printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 103 104 sc->mii_inst = mii->mii_instance; 105 sc->mii_phy = ma->mii_phyno; 106 sc->mii_funcs = &amhphy_funcs; 107 sc->mii_pdata = mii; 108 sc->mii_flags = mii->mii_flags; 109 sc->mii_anegticks = 5; 110 111 PHY_RESET(sc); 112 113 sc->mii_capabilities = 114 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 115 printf("%s: ", sc->mii_dev.dv_xname); 116 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 117 printf("no media present"); 118 else 119 mii_phy_add_media(sc); 120 printf("\n"); 121 } 122 123 int 124 amhphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 125 { 126 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 127 int reg; 128 129 switch (cmd) { 130 case MII_POLLSTAT: 131 /* 132 * If we're not polling our PHY instance, just return. 133 */ 134 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 135 return (0); 136 break; 137 138 case MII_MEDIACHG: 139 /* 140 * If the media indicates a different PHY instance, 141 * isolate ourselves. 142 */ 143 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 144 reg = PHY_READ(sc, MII_BMCR); 145 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 146 return (0); 147 } 148 149 /* 150 * If the interface is not up, don't do anything. 151 */ 152 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 153 break; 154 155 mii_phy_setmedia(sc); 156 break; 157 158 case MII_TICK: 159 /* 160 * If we're not currently selected, just return. 161 */ 162 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 163 return (0); 164 165 if (mii_phy_tick(sc) == EJUSTRETURN) 166 return (0); 167 break; 168 169 case MII_DOWN: 170 mii_phy_down(sc); 171 return (0); 172 } 173 174 /* Update the media status. */ 175 mii_phy_status(sc); 176 177 /* Callback if something changed. */ 178 mii_phy_update(sc, cmd); 179 return (0); 180 } 181 182 void 183 amhphy_status(struct mii_softc *sc) 184 { 185 struct mii_data *mii = sc->mii_pdata; 186 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 187 int bmsr, bmcr, ssr; 188 189 mii->mii_media_status = IFM_AVALID; 190 mii->mii_media_active = IFM_ETHER; 191 192 bmsr = PHY_READ(sc, MII_BMSR); 193 ssr = PHY_READ(sc, MII_AMHPHY_SSR); 194 195 if (ssr & SSR_LS) 196 mii->mii_media_status |= IFM_ACTIVE; 197 198 bmcr = PHY_READ(sc, MII_BMCR); 199 if (bmcr & BMCR_ISO) { 200 mii->mii_media_active |= IFM_NONE; 201 mii->mii_media_status = 0; 202 return; 203 } 204 205 if (bmcr & BMCR_LOOP) 206 mii->mii_media_active |= IFM_LOOP; 207 208 if (bmcr & BMCR_AUTOEN) { 209 /* 210 * The media status bits are only valid of autonegotiation 211 * has completed (or it's disabled). 212 */ 213 if ((bmsr & BMSR_ACOMP) == 0) { 214 /* Erg, still trying, I guess... */ 215 mii->mii_media_active |= IFM_NONE; 216 return; 217 } 218 219 if (ssr & SSR_S) { 220 /* 221 * This should't really ever happen, since it's 222 * a 10BASE-T only PHY. But the bit exists, 223 * according to the documentation, so we pay 224 * attention to it. 225 */ 226 mii->mii_media_active |= IFM_100_TX; 227 } else 228 mii->mii_media_active |= IFM_10_T; 229 if (ssr & SSR_FD) 230 mii->mii_media_active |= IFM_FDX; 231 } else 232 mii->mii_media_active = ife->ifm_media; 233 } 234