1 /* $NetBSD: pnaphy.c,v 1.17 2007/12/09 20:28:04 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 generic HomePNA 1.0 PHYs. 40 * 41 * HomePNA 1.0 PHYs are pretty simple -- they support exactly one 42 * media type, and don't do autonegotiation. 43 * 44 * HomePNA PHYs often have vendor-specific registers for tuning 45 * the network connection, but we don't deal with any of that 46 * at all. 47 */ 48 49 #include <sys/cdefs.h> 50 __KERNEL_RCSID(0, "$NetBSD: pnaphy.c,v 1.17 2007/12/09 20:28:04 jmcneill Exp $"); 51 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/kernel.h> 55 #include <sys/device.h> 56 #include <sys/socket.h> 57 #include <sys/errno.h> 58 59 #include <net/if.h> 60 #include <net/if_media.h> 61 62 #include <dev/mii/mii.h> 63 #include <dev/mii/miivar.h> 64 #include <dev/mii/miidevs.h> 65 66 static int pnaphymatch(struct device *, struct cfdata *, void *); 67 static void pnaphyattach(struct device *, struct device *, void *); 68 69 CFATTACH_DECL(pnaphy, sizeof(struct mii_softc), 70 pnaphymatch, pnaphyattach, mii_phy_detach, mii_phy_activate); 71 72 static int pnaphy_service(struct mii_softc *, struct mii_data *, int); 73 static void pnaphy_status(struct mii_softc *); 74 75 static const struct mii_phy_funcs pnaphy_funcs = { 76 pnaphy_service, pnaphy_status, mii_phy_reset, 77 }; 78 79 static const struct mii_phydesc pnaphys[] = { 80 { MII_OUI_yyAMD, MII_MODEL_yyAMD_79c901home, 81 MII_STR_yyAMD_79c901home }, 82 83 { 0, 0, 84 NULL }, 85 }; 86 87 static int 88 pnaphymatch(struct device *parent, struct cfdata *match, 89 void *aux) 90 { 91 struct mii_attach_args *ma = aux; 92 93 if (mii_phy_match(ma, pnaphys) != NULL) { 94 /* 95 * Match higher than ukphy, but lower than a specific 96 * driver would match. 97 */ 98 return (2); 99 } 100 101 return (0); 102 } 103 104 static void 105 pnaphyattach(struct device *parent, struct device *self, void *aux) 106 { 107 struct mii_softc *sc = device_private(self); 108 struct mii_attach_args *ma = aux; 109 struct mii_data *mii = ma->mii_data; 110 const struct mii_phydesc *mpd; 111 112 mpd = mii_phy_match(ma, pnaphys); 113 aprint_naive(": Media interface\n"); 114 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 115 116 sc->mii_inst = mii->mii_instance; 117 sc->mii_phy = ma->mii_phyno; 118 sc->mii_funcs = &pnaphy_funcs; 119 sc->mii_pdata = mii; 120 sc->mii_flags = ma->mii_flags | MIIF_IS_HPNA; /* force HomePNA */ 121 sc->mii_anegticks = MII_ANEGTICKS; 122 123 PHY_RESET(sc); 124 125 sc->mii_capabilities = 126 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 127 aprint_normal("%s: ", sc->mii_dev.dv_xname); 128 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 129 aprint_error("no media present"); 130 else 131 mii_phy_add_media(sc); 132 aprint_normal("\n"); 133 134 if (!pmf_device_register(self, NULL, mii_phy_resume)) 135 aprint_error_dev(self, "couldn't establish power handler\n"); 136 } 137 138 static int 139 pnaphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 140 { 141 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 142 int reg; 143 144 switch (cmd) { 145 case MII_POLLSTAT: 146 /* 147 * If we're not polling our PHY instance, just return. 148 */ 149 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 150 return (0); 151 break; 152 153 case MII_MEDIACHG: 154 /* 155 * If the media indicates a different PHY instance, 156 * isolate ourselves. 157 */ 158 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 159 reg = PHY_READ(sc, MII_BMCR); 160 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 161 return (0); 162 } 163 164 /* 165 * If the interface is not up, don't do anything. 166 */ 167 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 168 break; 169 170 mii_phy_setmedia(sc); 171 break; 172 173 case MII_TICK: 174 /* 175 * If we're not currently selected, just return. 176 */ 177 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 178 return (0); 179 180 if (mii_phy_tick(sc) == EJUSTRETURN) 181 return (0); 182 break; 183 184 case MII_DOWN: 185 mii_phy_down(sc); 186 return (0); 187 } 188 189 /* Update the media status. */ 190 mii_phy_status(sc); 191 192 /* Callback if something changed. */ 193 mii_phy_update(sc, cmd); 194 return (0); 195 } 196 197 static void 198 pnaphy_status(struct mii_softc *sc) 199 { 200 struct mii_data *mii = sc->mii_pdata; 201 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 202 int bmsr, bmcr; 203 204 mii->mii_media_status = IFM_AVALID; 205 mii->mii_media_active = IFM_ETHER; 206 207 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 208 209 if (bmsr & BMSR_LINK) 210 mii->mii_media_status |= IFM_ACTIVE; 211 212 bmcr = PHY_READ(sc, MII_BMCR); 213 if (bmcr & BMCR_ISO) { 214 mii->mii_media_active |= IFM_NONE; 215 mii->mii_media_status = 0; 216 return; 217 } 218 219 if (bmcr & BMCR_LOOP) 220 mii->mii_media_active |= IFM_LOOP; 221 222 /* 223 * On HomePNA PHYs, the current media is always the selected 224 * media. 225 * 226 * XXX May not be the case w/ HomePNA 2. 227 */ 228 mii->mii_media_active = ife->ifm_media; 229 } 230