dmphy.c revision 1.39
1 /* $NetBSD: dmphy.c,v 1.39 2019/02/24 17:22:21 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 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 THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 48 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 49 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 51 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 52 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 53 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 54 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 55 */ 56 57 /* 58 * driver for Davicom's DM9101 ethernet 10/100 PHY 59 * Data Sheet available from www.davicom8.com 60 */ 61 62 #include <sys/cdefs.h> 63 __KERNEL_RCSID(0, "$NetBSD: dmphy.c,v 1.39 2019/02/24 17:22:21 christos Exp $"); 64 65 #include <sys/param.h> 66 #include <sys/systm.h> 67 #include <sys/kernel.h> 68 #include <sys/device.h> 69 #include <sys/socket.h> 70 #include <sys/errno.h> 71 72 #include <net/if.h> 73 #include <net/if_media.h> 74 75 #include <dev/mii/mii.h> 76 #include <dev/mii/miivar.h> 77 #include <dev/mii/miidevs.h> 78 79 #include <dev/mii/dmphyreg.h> 80 81 static int dmphymatch(device_t, cfdata_t, void *); 82 static void dmphyattach(device_t, device_t, void *); 83 84 CFATTACH_DECL_NEW(dmphy, sizeof(struct mii_softc), 85 dmphymatch, dmphyattach, mii_phy_detach, mii_phy_activate); 86 87 static int dmphy_service(struct mii_softc *, struct mii_data *, int); 88 static void dmphy_status(struct mii_softc *); 89 90 static const struct mii_phy_funcs dmphy_funcs = { 91 dmphy_service, dmphy_status, mii_phy_reset, 92 }; 93 94 static const struct mii_phydesc dmphys[] = { 95 MII_PHY_DESC(xxDAVICOM, DM9101), 96 MII_PHY_DESC(xxDAVICOM, DM9102), 97 MII_PHY_DESC(xxDAVICOM, DM9101), 98 MII_PHY_END, 99 }; 100 101 static int 102 dmphymatch(device_t parent, cfdata_t match, void *aux) 103 { 104 struct mii_attach_args *ma = aux; 105 106 if (mii_phy_match(ma, dmphys) != NULL) 107 return (10); 108 109 return (0); 110 } 111 112 static void 113 dmphyattach(device_t parent, device_t self, void *aux) 114 { 115 struct mii_softc *sc = device_private(self); 116 struct mii_attach_args *ma = aux; 117 struct mii_data *mii = ma->mii_data; 118 const struct mii_phydesc *mpd; 119 120 mpd = mii_phy_match(ma, dmphys); 121 aprint_naive(": Media interface\n"); 122 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 123 124 sc->mii_dev = self; 125 sc->mii_inst = mii->mii_instance; 126 sc->mii_phy = ma->mii_phyno; 127 sc->mii_funcs = &dmphy_funcs; 128 sc->mii_pdata = mii; 129 sc->mii_flags = ma->mii_flags; 130 sc->mii_anegticks = MII_ANEGTICKS; 131 132 PHY_RESET(sc); 133 134 PHY_READ(sc, MII_BMSR, &sc->mii_capabilities); 135 sc->mii_capabilities &= ma->mii_capmask; 136 aprint_normal_dev(self, ""); 137 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 138 aprint_error("no media present"); 139 else 140 mii_phy_add_media(sc); 141 aprint_normal("\n"); 142 } 143 144 static int 145 dmphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 146 { 147 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 148 uint16_t reg; 149 150 switch (cmd) { 151 case MII_POLLSTAT: 152 /* 153 * If we're not polling our PHY instance, just return. 154 */ 155 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 156 return (0); 157 break; 158 159 case MII_MEDIACHG: 160 /* 161 * If the media indicates a different PHY instance, 162 * isolate ourselves. 163 */ 164 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 165 PHY_READ(sc, MII_BMCR, ®); 166 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 167 return (0); 168 } 169 170 /* 171 * If the interface is not up, don't do anything. 172 */ 173 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 174 break; 175 176 mii_phy_setmedia(sc); 177 break; 178 179 case MII_TICK: 180 /* 181 * If we're not currently selected, just return. 182 */ 183 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 184 return (0); 185 186 if (mii_phy_tick(sc) == EJUSTRETURN) 187 return (0); 188 break; 189 190 case MII_DOWN: 191 mii_phy_down(sc); 192 return (0); 193 } 194 195 /* Update the media status. */ 196 mii_phy_status(sc); 197 198 /* Callback if something changed. */ 199 mii_phy_update(sc, cmd); 200 return (0); 201 } 202 203 static void 204 dmphy_status(struct mii_softc *sc) 205 { 206 struct mii_data *mii = sc->mii_pdata; 207 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 208 uint16_t bmsr, bmcr, dscsr; 209 210 mii->mii_media_status = IFM_AVALID; 211 mii->mii_media_active = IFM_ETHER; 212 213 PHY_READ(sc, MII_BMSR, &bmsr); 214 PHY_READ(sc, MII_BMSR, &bmsr); 215 if (bmsr & BMSR_LINK) 216 mii->mii_media_status |= IFM_ACTIVE; 217 218 PHY_READ(sc, MII_BMCR, &bmcr); 219 if (bmcr & BMCR_ISO) { 220 mii->mii_media_active |= IFM_NONE; 221 mii->mii_media_status = 0; 222 return; 223 } 224 225 if (bmcr & BMCR_LOOP) 226 mii->mii_media_active |= IFM_LOOP; 227 228 if (bmcr & BMCR_AUTOEN) { 229 /* 230 * The PAR status bits are only valid if autonegotiation 231 * has completed (or it's disabled). 232 */ 233 if ((bmsr & BMSR_ACOMP) == 0) { 234 /* Erg, still trying, I guess... */ 235 mii->mii_media_active |= IFM_NONE; 236 return; 237 } 238 239 PHY_READ(sc, MII_DMPHY_DSCSR, &dscsr); 240 if (dscsr & DSCSR_100FDX) 241 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 242 else if (dscsr & DSCSR_100HDX) 243 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 244 else if (dscsr & DSCSR_10FDX) 245 mii->mii_media_active |= IFM_10_T|IFM_FDX; 246 else if (dscsr & DSCSR_10HDX) 247 mii->mii_media_active |= IFM_10_T|IFM_HDX; 248 else 249 mii->mii_media_active |= IFM_NONE; 250 } else 251 mii->mii_media_active = ife->ifm_media; 252 } 253
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