1 /* $NetBSD: pnaphy.c,v 1.9 2002/10/13 06:28:01 fair 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 1.9 2002/10/13 06:28:01 fair 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 int pnaphymatch(struct device *, struct cfdata *, void *); 67 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 int pnaphy_service(struct mii_softc *, struct mii_data *, int); 73 void pnaphy_status(struct mii_softc *); 74 75 const struct mii_phy_funcs pnaphy_funcs = { 76 pnaphy_service, pnaphy_status, mii_phy_reset, 77 }; 78 79 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 int 88 pnaphymatch(struct device *parent, struct cfdata *match, void *aux) 89 { 90 struct mii_attach_args *ma = aux; 91 92 if (mii_phy_match(ma, pnaphys) != NULL) { 93 /* 94 * Match higher than ukphy, but lower than a specific 95 * driver would match. 96 */ 97 return (2); 98 } 99 100 return (0); 101 } 102 103 void 104 pnaphyattach(struct device *parent, struct device *self, void *aux) 105 { 106 struct mii_softc *sc = (struct mii_softc *)self; 107 struct mii_attach_args *ma = aux; 108 struct mii_data *mii = ma->mii_data; 109 const struct mii_phydesc *mpd; 110 111 mpd = mii_phy_match(ma, pnaphys); 112 printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 113 114 sc->mii_inst = mii->mii_instance; 115 sc->mii_phy = ma->mii_phyno; 116 sc->mii_funcs = &pnaphy_funcs; 117 sc->mii_pdata = mii; 118 sc->mii_flags = ma->mii_flags | MIIF_IS_HPNA; /* force HomePNA */ 119 sc->mii_anegticks = 5; 120 121 PHY_RESET(sc); 122 123 sc->mii_capabilities = 124 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 125 printf("%s: ", sc->mii_dev.dv_xname); 126 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 127 printf("no media present"); 128 else 129 mii_phy_add_media(sc); 130 printf("\n"); 131 } 132 133 int 134 pnaphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 135 { 136 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 137 int reg; 138 139 switch (cmd) { 140 case MII_POLLSTAT: 141 /* 142 * If we're not polling our PHY instance, just return. 143 */ 144 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 145 return (0); 146 break; 147 148 case MII_MEDIACHG: 149 /* 150 * If the media indicates a different PHY instance, 151 * isolate ourselves. 152 */ 153 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 154 reg = PHY_READ(sc, MII_BMCR); 155 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 156 return (0); 157 } 158 159 /* 160 * If the interface is not up, don't do anything. 161 */ 162 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 163 break; 164 165 mii_phy_setmedia(sc); 166 break; 167 168 case MII_TICK: 169 /* 170 * If we're not currently selected, just return. 171 */ 172 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 173 return (0); 174 175 if (mii_phy_tick(sc) == EJUSTRETURN) 176 return (0); 177 break; 178 179 case MII_DOWN: 180 mii_phy_down(sc); 181 return (0); 182 } 183 184 /* Update the media status. */ 185 mii_phy_status(sc); 186 187 /* Callback if something changed. */ 188 mii_phy_update(sc, cmd); 189 return (0); 190 } 191 192 void 193 pnaphy_status(struct mii_softc *sc) 194 { 195 struct mii_data *mii = sc->mii_pdata; 196 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 197 int bmsr, bmcr; 198 199 mii->mii_media_status = IFM_AVALID; 200 mii->mii_media_active = IFM_ETHER; 201 202 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 203 204 if (bmsr & BMSR_LINK) 205 mii->mii_media_status |= IFM_ACTIVE; 206 207 bmcr = PHY_READ(sc, MII_BMCR); 208 if (bmcr & BMCR_ISO) { 209 mii->mii_media_active |= IFM_NONE; 210 mii->mii_media_status = 0; 211 return; 212 } 213 214 if (bmcr & BMCR_LOOP) 215 mii->mii_media_active |= IFM_LOOP; 216 217 /* 218 * On HomePNA PHYs, the current media is always the selected 219 * media. 220 * 221 * XXX May not be the case w/ HomePNA 2. 222 */ 223 mii->mii_media_active = ife->ifm_media; 224 } 225