1 /* $NetBSD: exphy.c,v 1.48 2008/04/14 20:03:13 spz 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 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by Manuel Bouyer. 54 * 4. The name of the author may not be used to endorse or promote products 55 * derived from this software without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 58 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 59 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 60 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 61 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 62 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 63 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 64 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 65 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 66 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 67 */ 68 69 /* 70 * driver for 3Com internal PHYs 71 */ 72 73 #include <sys/cdefs.h> 74 __KERNEL_RCSID(0, "$NetBSD: exphy.c,v 1.48 2008/04/14 20:03:13 spz Exp $"); 75 76 #include <sys/param.h> 77 #include <sys/systm.h> 78 #include <sys/kernel.h> 79 #include <sys/device.h> 80 #include <sys/socket.h> 81 82 #include <net/if.h> 83 #include <net/if_media.h> 84 85 #include <dev/mii/mii.h> 86 #include <dev/mii/miivar.h> 87 #include <dev/mii/miidevs.h> 88 89 static int exphymatch(struct device *, struct cfdata *, void *); 90 static void exphyattach(struct device *, struct device *, void *); 91 92 CFATTACH_DECL(exphy, sizeof(struct mii_softc), 93 exphymatch, exphyattach, mii_phy_detach, mii_phy_activate); 94 95 static int exphy_service(struct mii_softc *, struct mii_data *, int); 96 static void exphy_reset(struct mii_softc *); 97 98 static const struct mii_phy_funcs exphy_funcs = { 99 exphy_service, ukphy_status, exphy_reset, 100 }; 101 102 static int 103 exphymatch(struct device *parent, struct cfdata *match, void *aux) 104 { 105 struct mii_attach_args *ma = aux; 106 107 /* 108 * Argh, 3Com PHY reports oui == 0 model == 0! 109 */ 110 if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 && 111 MII_MODEL(ma->mii_id2) != 0) 112 return (0); 113 114 /* 115 * Make sure the parent is an `ex'. 116 */ 117 if (!device_is_a(parent, "ex")) 118 return (0); 119 120 return (10); 121 } 122 123 static void 124 exphyattach(struct device *parent, struct device *self, void *aux) 125 { 126 struct mii_softc *sc = device_private(self); 127 struct mii_attach_args *ma = aux; 128 struct mii_data *mii = ma->mii_data; 129 130 aprint_naive(": Media interface\n"); 131 aprint_normal(": 3Com internal media interface\n"); 132 133 sc->mii_inst = mii->mii_instance; 134 sc->mii_phy = ma->mii_phyno; 135 sc->mii_funcs = &exphy_funcs; 136 sc->mii_pdata = mii; 137 sc->mii_flags = ma->mii_flags; 138 sc->mii_anegticks = MII_ANEGTICKS; 139 140 /* 141 * The 3Com PHY can never be isolated, so never allow non-zero 142 * instances! 143 */ 144 if (mii->mii_instance != 0) { 145 aprint_error_dev(self, 146 "ignoring this PHY, non-zero instance\n"); 147 return; 148 } 149 sc->mii_flags |= MIIF_NOISOLATE; 150 151 PHY_RESET(sc); 152 153 sc->mii_capabilities = 154 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 155 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 156 aprint_error_dev(self, "no media present\n"); 157 else { 158 aprint_normal_dev(self, ""); 159 mii_phy_add_media(sc); 160 aprint_normal("\n"); 161 } 162 163 if (!pmf_device_register(self, NULL, mii_phy_resume)) 164 aprint_error_dev(self, "couldn't establish power handler\n"); 165 } 166 167 static int 168 exphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 169 { 170 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 171 172 /* 173 * We can't isolate the 3Com PHY, so it has to be the only one! 174 */ 175 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 176 panic("exphy_service: can't isolate 3Com PHY"); 177 178 switch (cmd) { 179 case MII_POLLSTAT: 180 break; 181 182 case MII_MEDIACHG: 183 /* 184 * If the interface is not up, don't do anything. 185 */ 186 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 187 break; 188 189 mii_phy_setmedia(sc); 190 break; 191 192 case MII_TICK: 193 /* 194 * Only used for autonegotiation. 195 */ 196 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 197 return (0); 198 199 if (mii_phy_tick(sc) == EJUSTRETURN) 200 return (0); 201 break; 202 203 case MII_DOWN: 204 mii_phy_down(sc); 205 return (0); 206 } 207 208 /* Update the media status. */ 209 mii_phy_status(sc); 210 211 /* Callback if something changed. */ 212 mii_phy_update(sc, cmd); 213 return (0); 214 } 215 216 static void 217 exphy_reset(struct mii_softc *sc) 218 { 219 220 mii_phy_reset(sc); 221 222 /* 223 * XXX 3Com PHY doesn't set the BMCR properly after 224 * XXX reset, which breaks autonegotiation. 225 */ 226 PHY_WRITE(sc, MII_BMCR, BMCR_S100|BMCR_AUTOEN|BMCR_FDX); 227 } 228