1 /* $NetBSD: gphyter.c,v 1.25 2008/05/05 01:37:56 tsutsui Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by Manuel Bouyer. 47 * 4. The name of the author may not be used to endorse or promote products 48 * derived from this software without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 51 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 52 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 53 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 54 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 55 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 56 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 57 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 58 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 59 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 60 */ 61 62 /* 63 * driver for National Semiconductor's DP83891 and DP83861 `Gig PHYTER' 64 * ethernet 10/100/1000 PHYs. The DP83891 is an older, non-firmware- 65 * driven version of the DP83861. 66 * 67 * Data Sheet available from www.national.com 68 */ 69 70 #include <sys/cdefs.h> 71 __KERNEL_RCSID(0, "$NetBSD: gphyter.c,v 1.25 2008/05/05 01:37:56 tsutsui Exp $"); 72 73 #include <sys/param.h> 74 #include <sys/systm.h> 75 #include <sys/kernel.h> 76 #include <sys/device.h> 77 #include <sys/socket.h> 78 #include <sys/errno.h> 79 80 #include <net/if.h> 81 #include <net/if_media.h> 82 83 #include <dev/mii/mii.h> 84 #include <dev/mii/miivar.h> 85 #include <dev/mii/miidevs.h> 86 87 #include <dev/mii/gphyterreg.h> 88 89 static int gphytermatch(device_t, cfdata_t, void *); 90 static void gphyterattach(device_t, device_t, void *); 91 92 CFATTACH_DECL_NEW(gphyter, sizeof(struct mii_softc), 93 gphytermatch, gphyterattach, mii_phy_detach, mii_phy_activate); 94 95 static int gphyter_service(struct mii_softc *, struct mii_data *, int); 96 static void gphyter_status(struct mii_softc *); 97 static void gphyter_reset(struct mii_softc *); 98 99 static const struct mii_phy_funcs gphyter_funcs = { 100 gphyter_service, gphyter_status, gphyter_reset, 101 }; 102 103 static const struct mii_phydesc gphyters[] = { 104 { MII_OUI_xxNATSEMI, MII_MODEL_xxNATSEMI_DP83861, 105 MII_STR_xxNATSEMI_DP83861 }, 106 107 { MII_OUI_xxNATSEMI, MII_MODEL_xxNATSEMI_DP83891, 108 MII_STR_xxNATSEMI_DP83891 }, 109 110 { 0, 0, 111 NULL }, 112 }; 113 114 static int 115 gphytermatch(device_t parent, cfdata_t match, void *aux) 116 { 117 struct mii_attach_args *ma = aux; 118 119 if (mii_phy_match(ma, gphyters) != NULL) 120 return (10); 121 122 return (0); 123 } 124 125 static void 126 gphyterattach(device_t parent, device_t self, void *aux) 127 { 128 struct mii_softc *sc = device_private(self); 129 struct mii_attach_args *ma = aux; 130 struct mii_data *mii = ma->mii_data; 131 const struct mii_phydesc *mpd; 132 int anar, strap; 133 134 mpd = mii_phy_match(ma, gphyters); 135 aprint_naive(": Media interface\n"); 136 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 137 138 sc->mii_dev = self; 139 sc->mii_inst = mii->mii_instance; 140 sc->mii_phy = ma->mii_phyno; 141 sc->mii_funcs = &gphyter_funcs; 142 sc->mii_pdata = mii; 143 sc->mii_flags = ma->mii_flags; 144 sc->mii_anegticks = MII_ANEGTICKS; 145 146 PHY_RESET(sc); 147 148 sc->mii_capabilities = 149 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 150 if (sc->mii_capabilities & BMSR_EXTSTAT) 151 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR); 152 153 /* 154 * The Gig PHYTER seems to have the 10baseT BMSR bits 155 * hard-wired to 0, even though the device supports 156 * 10baseT. What we do instead is read the post-reset 157 * ANAR, who's 10baseT-related bits are set by strapping 158 * pin 180, and fake the BMSR bits. 159 */ 160 anar = PHY_READ(sc, MII_ANAR); 161 if (anar & ANAR_10) 162 sc->mii_capabilities |= (BMSR_10THDX & ma->mii_capmask); 163 if (anar & ANAR_10_FD) 164 sc->mii_capabilities |= (BMSR_10TFDX & ma->mii_capmask); 165 166 aprint_normal_dev(self, ""); 167 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0 && 168 (sc->mii_extcapabilities & EXTSR_MEDIAMASK) == 0) 169 aprint_error("no media present"); 170 else 171 mii_phy_add_media(sc); 172 aprint_normal("\n"); 173 174 strap = PHY_READ(sc, MII_GPHYTER_STRAP); 175 aprint_normal_dev(self, "strapped to %s mode", 176 (strap & STRAP_MS_VAL) ? "master" : "slave"); 177 if (strap & STRAP_NC_MODE) 178 aprint_normal(", pre-C5 BCM5400 compat enabled"); 179 aprint_normal("\n"); 180 181 if (!pmf_device_register(self, NULL, mii_phy_resume)) 182 aprint_error_dev(self, "couldn't establish power handler\n"); 183 } 184 185 static int 186 gphyter_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 187 { 188 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 189 int reg; 190 191 switch (cmd) { 192 case MII_POLLSTAT: 193 /* 194 * If we're not polling our PHY instance, just return. 195 */ 196 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 197 return (0); 198 break; 199 200 case MII_MEDIACHG: 201 /* 202 * If the media indicates a different PHY instance, 203 * isolate ourselves. 204 */ 205 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 206 reg = PHY_READ(sc, MII_BMCR); 207 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 208 return (0); 209 } 210 211 /* 212 * If the interface is not up, don't do anything. 213 */ 214 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 215 break; 216 217 mii_phy_setmedia(sc); 218 break; 219 220 case MII_TICK: 221 /* 222 * If we're not currently selected, just return. 223 */ 224 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 225 return (0); 226 227 if (mii_phy_tick(sc) == EJUSTRETURN) 228 return (0); 229 break; 230 231 case MII_DOWN: 232 mii_phy_down(sc); 233 return (0); 234 } 235 236 /* Update the media status. */ 237 mii_phy_status(sc); 238 239 /* Callback if something changed. */ 240 mii_phy_update(sc, cmd); 241 return (0); 242 } 243 244 static void 245 gphyter_status(struct mii_softc *sc) 246 { 247 struct mii_data *mii = sc->mii_pdata; 248 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 249 int bmsr, bmcr, physup, gtsr; 250 251 mii->mii_media_status = IFM_AVALID; 252 mii->mii_media_active = IFM_ETHER; 253 254 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 255 256 physup = PHY_READ(sc, MII_GPHYTER_PHY_SUP); 257 258 if (physup & PHY_SUP_LINK) 259 mii->mii_media_status |= IFM_ACTIVE; 260 261 bmcr = PHY_READ(sc, MII_BMCR); 262 if (bmcr & BMCR_ISO) { 263 mii->mii_media_active |= IFM_NONE; 264 mii->mii_media_status = 0; 265 return; 266 } 267 268 if (bmcr & BMCR_LOOP) 269 mii->mii_media_active |= IFM_LOOP; 270 271 if (bmcr & BMCR_AUTOEN) { 272 /* 273 * The media status bits are only valid of autonegotiation 274 * has completed (or it's disabled). 275 */ 276 if ((bmsr & BMSR_ACOMP) == 0) { 277 /* Erg, still trying, I guess... */ 278 mii->mii_media_active |= IFM_NONE; 279 return; 280 } 281 282 switch (physup & (PHY_SUP_SPEED1|PHY_SUP_SPEED0)) { 283 case PHY_SUP_SPEED1: 284 mii->mii_media_active |= IFM_1000_T; 285 gtsr = PHY_READ(sc, MII_100T2SR); 286 if (gtsr & GTSR_MS_RES) 287 mii->mii_media_active |= IFM_ETH_MASTER; 288 break; 289 290 case PHY_SUP_SPEED0: 291 mii->mii_media_active |= IFM_100_TX; 292 break; 293 294 case 0: 295 mii->mii_media_active |= IFM_10_T; 296 break; 297 298 default: 299 mii->mii_media_active |= IFM_NONE; 300 mii->mii_media_status = 0; 301 } 302 if (physup & PHY_SUP_DUPLEX) 303 mii->mii_media_active |= 304 IFM_FDX | mii_phy_flowstatus(sc); 305 } else 306 mii->mii_media_active = ife->ifm_media; 307 } 308 309 void 310 gphyter_reset(struct mii_softc *sc) 311 { 312 int reg, i; 313 314 if (sc->mii_flags & MIIF_NOISOLATE) 315 reg = BMCR_RESET; 316 else 317 reg = BMCR_RESET | BMCR_ISO; 318 PHY_WRITE(sc, MII_BMCR, reg); 319 320 /* 321 * It is best to allow a little time for the reset to settle 322 * in before we start polling the BMCR again. Notably, the 323 * DP83840A manual states that there should be a 500us delay 324 * between asserting software reset and attempting MII serial 325 * operations. Also, a DP83815 can get into a bad state on 326 * cable removal and reinsertion if we do not delay here. 327 */ 328 delay(500); 329 330 /* Wait another 100ms for it to complete. */ 331 for (i = 0; i < 100; i++) { 332 reg = PHY_READ(sc, MII_BMCR); 333 if ((reg & BMCR_RESET) == 0) 334 break; 335 delay(1000); 336 } 337 338 if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0)) 339 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 340 } 341