1 /* $NetBSD: pnaphy.c,v 1.24 2019/03/25 09:20:46 msaitoh 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 1.24 2019/03/25 09:20:46 msaitoh 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(device_t, cfdata_t, void *); 67 static void pnaphyattach(device_t, device_t, void *); 68 69 CFATTACH_DECL_NEW(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_PHY_DESC(yyAMD, 79c901home), 81 MII_PHY_END, 82 }; 83 84 static int 85 pnaphymatch(device_t parent, cfdata_t match, void *aux) 86 { 87 struct mii_attach_args *ma = aux; 88 89 if (mii_phy_match(ma, pnaphys) != NULL) { 90 /* 91 * Match higher than ukphy, but lower than a specific 92 * driver would match. 93 */ 94 return 2; 95 } 96 97 return 0; 98 } 99 100 static void 101 pnaphyattach(device_t parent, device_t self, void *aux) 102 { 103 struct mii_softc *sc = device_private(self); 104 struct mii_attach_args *ma = aux; 105 struct mii_data *mii = ma->mii_data; 106 const struct mii_phydesc *mpd; 107 108 mpd = mii_phy_match(ma, pnaphys); 109 aprint_naive(": Media interface\n"); 110 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 111 112 sc->mii_dev = self; 113 sc->mii_inst = mii->mii_instance; 114 sc->mii_phy = ma->mii_phyno; 115 sc->mii_funcs = &pnaphy_funcs; 116 sc->mii_pdata = mii; 117 sc->mii_flags = ma->mii_flags | MIIF_IS_HPNA; /* Force HomePNA */ 118 sc->mii_anegticks = MII_ANEGTICKS; 119 120 PHY_RESET(sc); 121 122 PHY_READ(sc, MII_BMSR, &sc->mii_capabilities); 123 sc->mii_capabilities &= ma->mii_capmask; 124 aprint_normal_dev(self, ""); 125 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 126 aprint_error("no media present"); 127 else 128 mii_phy_add_media(sc); 129 aprint_normal("\n"); 130 } 131 132 static int 133 pnaphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 134 { 135 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 136 uint16_t reg; 137 138 switch (cmd) { 139 case MII_POLLSTAT: 140 /* If we're not polling our PHY instance, just return. */ 141 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 142 return 0; 143 break; 144 145 case MII_MEDIACHG: 146 /* 147 * If the media indicates a different PHY instance, 148 * isolate ourselves. 149 */ 150 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 151 PHY_READ(sc, MII_BMCR, ®); 152 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 153 return 0; 154 } 155 156 /* If the interface is not up, don't do anything. */ 157 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 158 break; 159 160 mii_phy_setmedia(sc); 161 break; 162 163 case MII_TICK: 164 /* If we're not currently selected, just return. */ 165 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 166 return 0; 167 168 if (mii_phy_tick(sc) == EJUSTRETURN) 169 return 0; 170 break; 171 172 case MII_DOWN: 173 mii_phy_down(sc); 174 return 0; 175 } 176 177 /* Update the media status. */ 178 mii_phy_status(sc); 179 180 /* Callback if something changed. */ 181 mii_phy_update(sc, cmd); 182 return 0; 183 } 184 185 static void 186 pnaphy_status(struct mii_softc *sc) 187 { 188 struct mii_data *mii = sc->mii_pdata; 189 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 190 uint16_t bmsr, bmcr; 191 192 mii->mii_media_status = IFM_AVALID; 193 mii->mii_media_active = IFM_ETHER; 194 195 PHY_READ(sc, MII_BMSR, &bmsr); 196 PHY_READ(sc, MII_BMSR, &bmsr); 197 198 if (bmsr & BMSR_LINK) 199 mii->mii_media_status |= IFM_ACTIVE; 200 201 PHY_READ(sc, MII_BMCR, &bmcr); 202 if (bmcr & BMCR_ISO) { 203 mii->mii_media_active |= IFM_NONE; 204 mii->mii_media_status = 0; 205 return; 206 } 207 208 if (bmcr & BMCR_LOOP) 209 mii->mii_media_active |= IFM_LOOP; 210 211 /* 212 * On HomePNA PHYs, the current media is always the selected 213 * media. 214 * 215 * XXX May not be the case w/ HomePNA 2. 216 */ 217 mii->mii_media_active = ife->ifm_media; 218 } 219