1 /* $NetBSD: amhphy.c,v 1.16 2007/12/09 20:28:02 jmcneill 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/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: amhphy.c,v 1.16 2007/12/09 20:28:02 jmcneill Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/device.h> 49 #include <sys/socket.h> 50 #include <sys/errno.h> 51 52 #include <net/if.h> 53 #include <net/if_media.h> 54 55 #include <dev/mii/mii.h> 56 #include <dev/mii/miivar.h> 57 #include <dev/mii/miidevs.h> 58 59 #include <dev/mii/amhphyreg.h> 60 61 static int amhphymatch(struct device *, struct cfdata *, void *); 62 static void amhphyattach(struct device *, struct device *, void *); 63 64 CFATTACH_DECL(amhphy, sizeof(struct mii_softc), 65 amhphymatch, amhphyattach, mii_phy_detach, mii_phy_activate); 66 67 static int amhphy_service(struct mii_softc *, struct mii_data *, int); 68 static void amhphy_status(struct mii_softc *); 69 70 static const struct mii_phy_funcs amhphy_funcs = { 71 amhphy_service, amhphy_status, mii_phy_reset, 72 }; 73 74 static 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 static int 83 amhphymatch(struct device *parent, struct cfdata *match, 84 void *aux) 85 { 86 struct mii_attach_args *ma = aux; 87 88 if (mii_phy_match(ma, amhphys) != NULL) 89 return (10); 90 91 return (0); 92 } 93 94 static void 95 amhphyattach(struct device *parent, struct device *self, void *aux) 96 { 97 struct mii_softc *sc = device_private(self); 98 struct mii_attach_args *ma = aux; 99 struct mii_data *mii = ma->mii_data; 100 const struct mii_phydesc *mpd; 101 102 mpd = mii_phy_match(ma, amhphys); 103 aprint_naive(": Media interface\n"); 104 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 105 106 sc->mii_inst = mii->mii_instance; 107 sc->mii_phy = ma->mii_phyno; 108 sc->mii_funcs = &amhphy_funcs; 109 sc->mii_pdata = mii; 110 sc->mii_flags = ma->mii_flags; 111 sc->mii_anegticks = MII_ANEGTICKS; 112 113 PHY_RESET(sc); 114 115 sc->mii_capabilities = 116 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 117 aprint_normal("%s: ", sc->mii_dev.dv_xname); 118 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 119 aprint_error("no media present"); 120 else 121 mii_phy_add_media(sc); 122 aprint_normal("\n"); 123 124 if (!pmf_device_register(self, NULL, mii_phy_resume)) 125 aprint_error_dev(self, "couldn't establish power handler\n"); 126 } 127 128 static int 129 amhphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 130 { 131 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 132 int reg; 133 134 switch (cmd) { 135 case MII_POLLSTAT: 136 /* 137 * If we're not polling our PHY instance, just return. 138 */ 139 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 140 return (0); 141 break; 142 143 case MII_MEDIACHG: 144 /* 145 * If the media indicates a different PHY instance, 146 * isolate ourselves. 147 */ 148 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 149 reg = PHY_READ(sc, MII_BMCR); 150 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 151 return (0); 152 } 153 154 /* 155 * If the interface is not up, don't do anything. 156 */ 157 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 158 break; 159 160 mii_phy_setmedia(sc); 161 break; 162 163 case MII_TICK: 164 /* 165 * If we're not currently selected, just return. 166 */ 167 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 168 return (0); 169 170 if (mii_phy_tick(sc) == EJUSTRETURN) 171 return (0); 172 break; 173 174 case MII_DOWN: 175 mii_phy_down(sc); 176 return (0); 177 } 178 179 /* Update the media status. */ 180 mii_phy_status(sc); 181 182 /* Callback if something changed. */ 183 mii_phy_update(sc, cmd); 184 return (0); 185 } 186 187 static void 188 amhphy_status(struct mii_softc *sc) 189 { 190 struct mii_data *mii = sc->mii_pdata; 191 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 192 int bmsr, bmcr, ssr; 193 194 mii->mii_media_status = IFM_AVALID; 195 mii->mii_media_active = IFM_ETHER; 196 197 bmsr = PHY_READ(sc, MII_BMSR); 198 ssr = PHY_READ(sc, MII_AMHPHY_SSR); 199 200 if (ssr & SSR_LS) 201 mii->mii_media_status |= IFM_ACTIVE; 202 203 bmcr = PHY_READ(sc, MII_BMCR); 204 if (bmcr & BMCR_ISO) { 205 mii->mii_media_active |= IFM_NONE; 206 mii->mii_media_status = 0; 207 return; 208 } 209 210 if (bmcr & BMCR_LOOP) 211 mii->mii_media_active |= IFM_LOOP; 212 213 if (bmcr & BMCR_AUTOEN) { 214 /* 215 * The media status bits are only valid of autonegotiation 216 * has completed (or it's disabled). 217 */ 218 if ((bmsr & BMSR_ACOMP) == 0) { 219 /* Erg, still trying, I guess... */ 220 mii->mii_media_active |= IFM_NONE; 221 return; 222 } 223 224 if (ssr & SSR_S) { 225 /* 226 * This should't really ever happen, since it's 227 * a 10BASE-T only PHY. But the bit exists, 228 * according to the documentation, so we pay 229 * attention to it. 230 */ 231 mii->mii_media_active |= IFM_100_TX; 232 } else 233 mii->mii_media_active |= IFM_10_T; 234 if (ssr & SSR_FD) 235 mii->mii_media_active |= IFM_FDX; 236 } else 237 mii->mii_media_active = ife->ifm_media; 238 } 239