1 /* $NetBSD: exphy.c,v 1.54 2016/07/07 06:55:41 msaitoh 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, and by Frank van der Linden. 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 3Com internal PHYs 59 */ 60 61 #include <sys/cdefs.h> 62 __KERNEL_RCSID(0, "$NetBSD: exphy.c,v 1.54 2016/07/07 06:55:41 msaitoh Exp $"); 63 64 #include <sys/param.h> 65 #include <sys/systm.h> 66 #include <sys/kernel.h> 67 #include <sys/device.h> 68 #include <sys/socket.h> 69 70 #include <net/if.h> 71 #include <net/if_media.h> 72 73 #include <dev/mii/mii.h> 74 #include <dev/mii/miivar.h> 75 #include <dev/mii/miidevs.h> 76 77 static int exphymatch(device_t, cfdata_t, void *); 78 static void exphyattach(device_t, device_t, void *); 79 80 CFATTACH_DECL_NEW(exphy, sizeof(struct mii_softc), 81 exphymatch, exphyattach, mii_phy_detach, mii_phy_activate); 82 83 static int exphy_service(struct mii_softc *, struct mii_data *, int); 84 static void exphy_reset(struct mii_softc *); 85 86 static const struct mii_phy_funcs exphy_funcs = { 87 exphy_service, ukphy_status, exphy_reset, 88 }; 89 90 static int 91 exphymatch(device_t parent, cfdata_t match, void *aux) 92 { 93 struct mii_attach_args *ma = aux; 94 95 /* 96 * Argh, 3Com PHY reports oui == 0 model == 0! 97 */ 98 if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 && 99 MII_MODEL(ma->mii_id2) != 0) 100 return (0); 101 102 /* 103 * Make sure the parent is an `ex'. 104 */ 105 if (!device_is_a(parent, "ex")) 106 return (0); 107 108 return (10); 109 } 110 111 static void 112 exphyattach(device_t parent, device_t self, void *aux) 113 { 114 struct mii_softc *sc = device_private(self); 115 struct mii_attach_args *ma = aux; 116 struct mii_data *mii = ma->mii_data; 117 118 aprint_naive(": Media interface\n"); 119 aprint_normal(": 3Com internal media interface\n"); 120 121 sc->mii_dev = self; 122 sc->mii_inst = mii->mii_instance; 123 sc->mii_phy = ma->mii_phyno; 124 sc->mii_funcs = &exphy_funcs; 125 sc->mii_pdata = mii; 126 sc->mii_flags = ma->mii_flags; 127 sc->mii_anegticks = MII_ANEGTICKS; 128 129 /* 130 * The 3Com PHY can never be isolated, so never allow non-zero 131 * instances! 132 */ 133 if (mii->mii_instance != 0) { 134 aprint_error_dev(self, 135 "ignoring this PHY, non-zero instance\n"); 136 return; 137 } 138 sc->mii_flags |= MIIF_NOISOLATE; 139 140 PHY_RESET(sc); 141 142 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 143 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 144 aprint_error_dev(self, "no media present\n"); 145 else { 146 aprint_normal_dev(self, ""); 147 mii_phy_add_media(sc); 148 aprint_normal("\n"); 149 } 150 } 151 152 static int 153 exphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 154 { 155 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 156 157 /* 158 * We can't isolate the 3Com PHY, so it has to be the only one! 159 */ 160 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 161 panic("exphy_service: can't isolate 3Com PHY"); 162 163 switch (cmd) { 164 case MII_POLLSTAT: 165 break; 166 167 case MII_MEDIACHG: 168 /* 169 * If the interface is not up, don't do anything. 170 */ 171 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 172 break; 173 174 mii_phy_setmedia(sc); 175 break; 176 177 case MII_TICK: 178 /* 179 * Only used for autonegotiation. 180 */ 181 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 182 break; 183 184 if (mii_phy_tick(sc) == EJUSTRETURN) 185 return (0); 186 break; 187 188 case MII_DOWN: 189 mii_phy_down(sc); 190 return (0); 191 } 192 193 /* Update the media status. */ 194 mii_phy_status(sc); 195 196 /* Callback if something changed. */ 197 mii_phy_update(sc, cmd); 198 return (0); 199 } 200 201 static void 202 exphy_reset(struct mii_softc *sc) 203 { 204 205 mii_phy_reset(sc); 206 207 /* 208 * XXX 3Com PHY doesn't set the BMCR properly after 209 * XXX reset, which breaks autonegotiation. 210 */ 211 PHY_WRITE(sc, MII_BMCR, BMCR_S100|BMCR_AUTOEN|BMCR_FDX); 212 } 213