1 /* $OpenBSD: nsgphy.c,v 1.25 2015/03/14 03:38:48 jsg Exp $ */ 2 /* 3 * Copyright (c) 2001 Wind River Systems 4 * Copyright (c) 2001 5 * Bill Paul <wpaul@bsdi.com>. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Bill Paul. 18 * 4. Neither the name of the author nor the names of any co-contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 * 34 */ 35 36 /* 37 * Driver for the National Semiconductor DP83861, DP83865 and DP83891 38 * 10/100/1000 PHYs. 39 * Datasheet available at: http://www.national.com/ds/DP/DP83861.pdf 40 * and at: http://www.national.com/ds/DP/DP83865.pdf 41 * 42 * The DP83891 is the older NatSemi gigE PHY which isn't being sold 43 * anymore. The DP83861 is its replacement, which is an 'enhanced' 44 * firmware driven component. The major difference between the 45 * two is that the 83891 can't generate interrupts, while the 46 * 83861 can. (I think it wasn't originally designed to do this, but 47 * it can now thanks to firmware updates.) The 83861 also allows 48 * access to its internal RAM via indirect register access. 49 * 50 * The DP83865 is a low power version of the DP83861. 51 */ 52 53 #include <sys/param.h> 54 #include <sys/systm.h> 55 #include <sys/device.h> 56 #include <sys/socket.h> 57 58 #include <net/if.h> 59 #include <net/if_var.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 #include <dev/mii/nsgphyreg.h> 67 68 int nsgphymatch(struct device*, void *, void *); 69 void nsgphyattach(struct device *, struct device *, void *); 70 71 struct cfattach nsgphy_ca = { 72 sizeof(struct mii_softc), nsgphymatch, nsgphyattach, mii_phy_detach 73 }; 74 75 struct cfdriver nsgphy_cd = { 76 NULL, "nsgphy", DV_DULL 77 }; 78 79 int nsgphy_service(struct mii_softc *, struct mii_data *, int); 80 void nsgphy_status(struct mii_softc *); 81 82 const struct mii_phy_funcs nsgphy_funcs = { 83 nsgphy_service, nsgphy_status, mii_phy_reset, 84 }; 85 86 static const struct mii_phydesc nsgphys[] = { 87 { MII_OUI_NATSEMI, MII_MODEL_NATSEMI_DP83861, 88 MII_STR_NATSEMI_DP83861 }, 89 { MII_OUI_NATSEMI, MII_MODEL_NATSEMI_DP83865, 90 MII_STR_NATSEMI_DP83865 }, 91 { MII_OUI_NATSEMI, MII_MODEL_NATSEMI_DP83891, 92 MII_STR_NATSEMI_DP83891 }, 93 94 { 0, 0, 95 NULL }, 96 }; 97 98 int 99 nsgphymatch(struct device *parent, void *match, void *aux) 100 { 101 struct mii_attach_args *ma = aux; 102 103 if (mii_phy_match(ma, nsgphys) != NULL) 104 return (10); 105 106 return (0); 107 } 108 109 void 110 nsgphyattach(struct device *parent, struct device *self, void *aux) 111 { 112 struct mii_softc *sc = (struct mii_softc *)self; 113 struct mii_attach_args *ma = aux; 114 struct mii_data *mii = ma->mii_data; 115 const struct mii_phydesc *mpd; 116 int anar; 117 118 mpd = mii_phy_match(ma, nsgphys); 119 printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 120 121 sc->mii_inst = mii->mii_instance; 122 sc->mii_phy = ma->mii_phyno; 123 sc->mii_funcs = &nsgphy_funcs; 124 sc->mii_pdata = mii; 125 sc->mii_flags = ma->mii_flags; 126 sc->mii_anegticks = MII_ANEGTICKS; 127 128 PHY_RESET(sc); 129 130 sc->mii_capabilities = 131 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 132 if (sc->mii_capabilities & BMSR_EXTSTAT) 133 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR); 134 135 /* 136 * The PHY seems to have the 10baseT BMSR bits 137 * hard-wired to 0, even though the device supports 138 * 10baseT. What we do instead is read the post-reset 139 * ANAR, who's 10baseT-related bits are set by strapping 140 * pin 180, and fake the BMSR bits. 141 */ 142 anar = PHY_READ(sc, MII_ANAR); 143 if (anar & ANAR_10) 144 sc->mii_capabilities |= (BMSR_10THDX & ma->mii_capmask); 145 if (anar & ANAR_10_FD) 146 sc->mii_capabilities |= (BMSR_10TFDX & ma->mii_capmask); 147 148 if ((sc->mii_capabilities & BMSR_MEDIAMASK) || 149 (sc->mii_extcapabilities & EXTSR_MEDIAMASK)) 150 mii_phy_add_media(sc); 151 } 152 153 int 154 nsgphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 155 { 156 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 157 int reg; 158 159 if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0) 160 return (ENXIO); 161 162 switch (cmd) { 163 case MII_POLLSTAT: 164 /* 165 * If we're not polling our PHY instance, just return. 166 */ 167 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 168 return (0); 169 break; 170 171 case MII_MEDIACHG: 172 /* 173 * If the media indicates a different PHY instance, 174 * isolate ourselves. 175 */ 176 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 177 reg = PHY_READ(sc, MII_BMCR); 178 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 179 return (0); 180 } 181 182 /* 183 * If the interface is not up, don't do anything. 184 */ 185 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 186 break; 187 188 mii_phy_setmedia(sc); 189 break; 190 191 case MII_TICK: 192 /* 193 * If we're not currently selected, just return. 194 */ 195 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 196 return (0); 197 198 if (mii_phy_tick(sc) == EJUSTRETURN) 199 return (0); 200 break; 201 case MII_DOWN: 202 mii_phy_down(sc); 203 return (0); 204 } 205 206 /* Update the media status. */ 207 mii_phy_status(sc); 208 209 /* Callback if something changed. */ 210 mii_phy_update(sc, cmd); 211 return (0); 212 } 213 214 void 215 nsgphy_status(struct mii_softc *sc) 216 { 217 struct mii_data *mii = sc->mii_pdata; 218 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 219 int bmsr, bmcr, physup, gtsr; 220 221 mii->mii_media_status = IFM_AVALID; 222 mii->mii_media_active = IFM_ETHER; 223 224 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 225 226 physup = PHY_READ(sc, NSGPHY_MII_PHYSUP); 227 228 if (physup & PHY_SUP_LINK) 229 mii->mii_media_status |= IFM_ACTIVE; 230 231 bmcr = PHY_READ(sc, MII_BMCR); 232 if (bmcr & BMCR_ISO) { 233 mii->mii_media_active |= IFM_NONE; 234 mii->mii_media_status = 0; 235 return; 236 } 237 238 if (bmcr & BMCR_LOOP) 239 mii->mii_media_active |= IFM_LOOP; 240 241 if (bmcr & BMCR_AUTOEN) { 242 if ((bmsr & BMSR_ACOMP) == 0) { 243 /* Erg, still trying, I guess... */ 244 mii->mii_media_active |= IFM_NONE; 245 return; 246 } 247 248 switch (physup & (PHY_SUP_SPEED1|PHY_SUP_SPEED0)) { 249 case PHY_SUP_SPEED1: 250 mii->mii_media_active |= IFM_1000_T; 251 gtsr = PHY_READ(sc, MII_100T2SR); 252 if (gtsr & GTSR_MS_RES) 253 mii->mii_media_active |= IFM_ETH_MASTER; 254 break; 255 256 case PHY_SUP_SPEED0: 257 mii->mii_media_active |= IFM_100_TX; 258 break; 259 260 case 0: 261 mii->mii_media_active |= IFM_10_T; 262 break; 263 264 default: 265 mii->mii_media_active |= IFM_NONE; 266 mii->mii_media_status = 0; 267 return; 268 } 269 270 if (physup & PHY_SUP_DUPLEX) 271 mii->mii_media_active |= mii_phy_flowstatus(sc) | IFM_FDX; 272 else 273 mii->mii_media_active |= IFM_HDX; 274 } else 275 mii->mii_media_active = ife->ifm_media; 276 } 277