1 /* $NetBSD: amhphy.c,v 1.19 2008/11/17 03:04:27 dyoung 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 1.19 2008/11/17 03:04:27 dyoung 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(device_t, cfdata_t, void *); 62 static void amhphyattach(device_t, device_t, void *); 63 64 CFATTACH_DECL_NEW(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(device_t parent, cfdata_t 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 static void 94 amhphyattach(device_t parent, device_t self, void *aux) 95 { 96 struct mii_softc *sc = device_private(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 aprint_naive(": Media interface\n"); 103 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 104 105 sc->mii_dev = self; 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_dev(self, ""); 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 } 124 125 static int 126 amhphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 127 { 128 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 129 int reg; 130 131 switch (cmd) { 132 case MII_POLLSTAT: 133 /* 134 * If we're not polling our PHY instance, just return. 135 */ 136 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 137 return (0); 138 break; 139 140 case MII_MEDIACHG: 141 /* 142 * If the media indicates a different PHY instance, 143 * isolate ourselves. 144 */ 145 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 146 reg = PHY_READ(sc, MII_BMCR); 147 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 148 return (0); 149 } 150 151 /* 152 * If the interface is not up, don't do anything. 153 */ 154 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 155 break; 156 157 mii_phy_setmedia(sc); 158 break; 159 160 case MII_TICK: 161 /* 162 * If we're not currently selected, just return. 163 */ 164 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 165 return (0); 166 167 if (mii_phy_tick(sc) == EJUSTRETURN) 168 return (0); 169 break; 170 171 case MII_DOWN: 172 mii_phy_down(sc); 173 return (0); 174 } 175 176 /* Update the media status. */ 177 mii_phy_status(sc); 178 179 /* Callback if something changed. */ 180 mii_phy_update(sc, cmd); 181 return (0); 182 } 183 184 static void 185 amhphy_status(struct mii_softc *sc) 186 { 187 struct mii_data *mii = sc->mii_pdata; 188 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 189 int bmsr, bmcr, ssr; 190 191 mii->mii_media_status = IFM_AVALID; 192 mii->mii_media_active = IFM_ETHER; 193 194 bmsr = PHY_READ(sc, MII_BMSR); 195 ssr = PHY_READ(sc, MII_AMHPHY_SSR); 196 197 if (ssr & SSR_LS) 198 mii->mii_media_status |= IFM_ACTIVE; 199 200 bmcr = PHY_READ(sc, MII_BMCR); 201 if (bmcr & BMCR_ISO) { 202 mii->mii_media_active |= IFM_NONE; 203 mii->mii_media_status = 0; 204 return; 205 } 206 207 if (bmcr & BMCR_LOOP) 208 mii->mii_media_active |= IFM_LOOP; 209 210 if (bmcr & BMCR_AUTOEN) { 211 /* 212 * The media status bits are only valid of autonegotiation 213 * has completed (or it's disabled). 214 */ 215 if ((bmsr & BMSR_ACOMP) == 0) { 216 /* Erg, still trying, I guess... */ 217 mii->mii_media_active |= IFM_NONE; 218 return; 219 } 220 221 if (ssr & SSR_S) { 222 /* 223 * This should't really ever happen, since it's 224 * a 10BASE-T only PHY. But the bit exists, 225 * according to the documentation, so we pay 226 * attention to it. 227 */ 228 mii->mii_media_active |= IFM_100_TX; 229 } else 230 mii->mii_media_active |= IFM_10_T; 231 if (ssr & SSR_FD) 232 mii->mii_media_active |= IFM_FDX; 233 } else 234 mii->mii_media_active = ife->ifm_media; 235 } 236