1 /* $NetBSD: pnaphy.c,v 1.4 2002/03/25 20:51:25 thorpej 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 1.4 2002/03/25 20:51:25 thorpej 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/malloc.h> 57 #include <sys/socket.h> 58 #include <sys/errno.h> 59 60 #include <net/if.h> 61 #include <net/if_media.h> 62 63 #include <dev/mii/mii.h> 64 #include <dev/mii/miivar.h> 65 #include <dev/mii/miidevs.h> 66 67 int pnaphymatch(struct device *, struct cfdata *, void *); 68 void pnaphyattach(struct device *, struct device *, void *); 69 70 struct cfattach pnaphy_ca = { 71 sizeof(struct mii_softc), pnaphymatch, pnaphyattach, 72 mii_phy_detach, mii_phy_activate 73 }; 74 75 int pnaphy_service(struct mii_softc *, struct mii_data *, int); 76 void pnaphy_status(struct mii_softc *); 77 78 const struct mii_phy_funcs pnaphy_funcs = { 79 pnaphy_service, pnaphy_status, mii_phy_reset, 80 }; 81 82 const struct mii_phydesc pnaphys[] = { 83 { MII_OUI_yyAMD, MII_MODEL_yyAMD_79c901home, 84 MII_STR_yyAMD_79c901home }, 85 86 { 0, 0, 87 NULL }, 88 }; 89 90 int 91 pnaphymatch(struct device *parent, struct cfdata *match, void *aux) 92 { 93 struct mii_attach_args *ma = aux; 94 95 if (mii_phy_match(ma, pnaphys) != NULL) { 96 /* 97 * Match higher than ukphy, but lower than a specific 98 * driver would match. 99 */ 100 return (2); 101 } 102 103 return (0); 104 } 105 106 void 107 pnaphyattach(struct device *parent, struct device *self, void *aux) 108 { 109 struct mii_softc *sc = (struct mii_softc *)self; 110 struct mii_attach_args *ma = aux; 111 struct mii_data *mii = ma->mii_data; 112 const struct mii_phydesc *mpd; 113 114 mpd = mii_phy_match(ma, pnaphys); 115 printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 116 117 sc->mii_inst = mii->mii_instance; 118 sc->mii_phy = ma->mii_phyno; 119 sc->mii_funcs = &pnaphy_funcs; 120 sc->mii_pdata = mii; 121 sc->mii_flags = ma->mii_flags; 122 sc->mii_anegticks = 5; 123 124 PHY_RESET(sc); 125 126 sc->mii_capabilities = 127 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 128 printf("%s: ", sc->mii_dev.dv_xname); 129 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 130 printf("no media present"); 131 else 132 mii_phy_add_media(sc); 133 printf("\n"); 134 } 135 136 int 137 pnaphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 138 { 139 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 140 int reg; 141 142 switch (cmd) { 143 case MII_POLLSTAT: 144 /* 145 * If we're not polling our PHY instance, just return. 146 */ 147 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 148 return (0); 149 break; 150 151 case MII_MEDIACHG: 152 /* 153 * If the media indicates a different PHY instance, 154 * isolate ourselves. 155 */ 156 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 157 reg = PHY_READ(sc, MII_BMCR); 158 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 159 return (0); 160 } 161 162 /* 163 * If the interface is not up, don't do anything. 164 */ 165 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 166 break; 167 168 mii_phy_setmedia(sc); 169 break; 170 171 case MII_TICK: 172 /* 173 * If we're not currently selected, just return. 174 */ 175 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 176 return (0); 177 178 if (mii_phy_tick(sc) == EJUSTRETURN) 179 return (0); 180 break; 181 182 case MII_DOWN: 183 mii_phy_down(sc); 184 return (0); 185 } 186 187 /* Update the media status. */ 188 mii_phy_status(sc); 189 190 /* Callback if something changed. */ 191 mii_phy_update(sc, cmd); 192 return (0); 193 } 194 195 void 196 pnaphy_status(struct mii_softc *sc) 197 { 198 struct mii_data *mii = sc->mii_pdata; 199 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 200 int bmsr, bmcr; 201 202 mii->mii_media_status = IFM_AVALID; 203 mii->mii_media_active = IFM_ETHER; 204 205 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 206 207 if (bmsr & BMSR_LINK) 208 mii->mii_media_status |= IFM_ACTIVE; 209 210 bmcr = PHY_READ(sc, MII_BMCR); 211 if (bmcr & BMCR_ISO) { 212 mii->mii_media_active |= IFM_NONE; 213 mii->mii_media_status = 0; 214 return; 215 } 216 217 if (bmcr & BMCR_LOOP) 218 mii->mii_media_active |= IFM_LOOP; 219 220 /* 221 * On HomePNA PHYs, the current media is always the selected 222 * media. 223 * 224 * XXX May not be the case w/ HomePNA 2. 225 */ 226 mii->mii_media_active = ife->ifm_media; 227 } 228