1 /* $NetBSD: ihphy.c,v 1.1 2010/11/27 20:15:27 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999, 2000 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, and by Frank van der Linden. 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 * 45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 48 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 49 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 51 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 52 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 53 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 54 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 55 */ 56 57 /* 58 * Driver for Intel's 82577 (Hanksville) Ethernet 10/100/1000 PHY 59 * Data Sheet: http://download.intel.com/design/network/datashts/319439.pdf 60 */ 61 62 #include <sys/cdefs.h> 63 __KERNEL_RCSID(0, "$NetBSD: ihphy.c,v 1.1 2010/11/27 20:15:27 christos Exp $"); 64 65 #include <sys/param.h> 66 #include <sys/systm.h> 67 #include <sys/kernel.h> 68 #include <sys/device.h> 69 #include <sys/socket.h> 70 #include <sys/errno.h> 71 72 #include <net/if.h> 73 #include <net/if_media.h> 74 75 #include <dev/mii/mii.h> 76 #include <dev/mii/miivar.h> 77 #include <dev/mii/miidevs.h> 78 79 #include <dev/mii/ihphyreg.h> 80 81 static int ihphymatch(device_t, cfdata_t, void *); 82 static void ihphyattach(device_t, device_t, void *); 83 84 CFATTACH_DECL3_NEW(ihphy, sizeof(struct mii_softc), 85 ihphymatch, ihphyattach, mii_phy_detach, mii_phy_activate, NULL, NULL, 86 DVF_DETACH_SHUTDOWN); 87 88 static int ihphy_service(struct mii_softc *, struct mii_data *, int); 89 static void ihphy_status(struct mii_softc *); 90 static void ihphy_reset(struct mii_softc *); 91 92 static const struct mii_phy_funcs ihphy_funcs = { 93 ihphy_service, ihphy_status, ihphy_reset, 94 }; 95 96 static const struct mii_phydesc ihphys[] = { 97 { MII_OUI_INTEL, MII_MODEL_INTEL_I82577, 98 MII_STR_INTEL_I82577 }, 99 100 { 0, 0, 101 NULL }, 102 }; 103 104 static int 105 ihphymatch(device_t parent, cfdata_t match, void *aux) 106 { 107 struct mii_attach_args *ma = aux; 108 109 if (mii_phy_match(ma, ihphys) != NULL) 110 return 10; 111 112 return 0; 113 } 114 115 static void 116 ihphyattach(device_t parent, device_t self, void *aux) 117 { 118 struct mii_softc *sc = device_private(self); 119 struct mii_attach_args *ma = aux; 120 struct mii_data *mii = ma->mii_data; 121 const struct mii_phydesc *mpd; 122 int reg; 123 124 mpd = mii_phy_match(ma, ihphys); 125 aprint_naive(": Media interface\n"); 126 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 127 128 sc->mii_dev = self; 129 sc->mii_inst = mii->mii_instance; 130 sc->mii_phy = ma->mii_phyno; 131 sc->mii_funcs = &ihphy_funcs; 132 sc->mii_pdata = mii; 133 sc->mii_flags = ma->mii_flags; 134 sc->mii_anegticks = MII_ANEGTICKS; 135 136 PHY_RESET(sc); 137 138 sc->mii_capabilities = 139 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 140 if (sc->mii_capabilities & BMSR_EXTSTAT) 141 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR); 142 aprint_normal_dev(self, ""); 143 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0 && 144 (sc->mii_extcapabilities & EXTSR_MEDIAMASK) == 0) 145 aprint_error("no media present"); 146 else 147 mii_phy_add_media(sc); 148 aprint_normal("\n"); 149 150 /* 151 * Link setup (as done by Intel's Linux driver for the 82577). 152 */ 153 reg = PHY_READ(sc, IHPHY_MII_CFG); 154 reg |= IHPHY_CFG_TX_CRS; 155 reg |= IHPHY_CFG_DOWN_SHIFT; 156 PHY_WRITE(sc, IHPHY_MII_CFG, reg); 157 } 158 159 static int 160 ihphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 161 { 162 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 163 int reg; 164 165 switch (cmd) { 166 case MII_POLLSTAT: 167 /* 168 * If we're not polling our PHY instance, just return. 169 */ 170 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 171 return 0; 172 break; 173 174 case MII_MEDIACHG: 175 /* 176 * If the media indicates a different PHY instance, 177 * isolate ourselves. 178 */ 179 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 180 reg = PHY_READ(sc, MII_BMCR); 181 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 182 return 0; 183 } 184 185 /* 186 * If the interface is not up, don't do anything. 187 */ 188 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 189 break; 190 191 /* 192 * If media is deselected, disable link (standby). 193 */ 194 reg = PHY_READ(sc, IHPHY_MII_ECR); 195 if (IFM_SUBTYPE(ife->ifm_media) == IFM_NONE) 196 reg &= ~IHPHY_ECR_LNK_EN; 197 else 198 reg |= IHPHY_ECR_LNK_EN; 199 PHY_WRITE(sc, IHPHY_MII_ECR, reg); 200 201 /* 202 * XXX Adjust MDI/MDIX configuration? Other settings? 203 */ 204 205 mii_phy_setmedia(sc); 206 break; 207 208 case MII_TICK: 209 /* 210 * If we're not currently selected, just return. 211 */ 212 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 213 return 0; 214 215 /* 216 * Only used for autonegotiation. 217 */ 218 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 219 return 0; 220 221 if (mii_phy_tick(sc) == EJUSTRETURN) 222 return 0; 223 break; 224 225 case MII_DOWN: 226 mii_phy_down(sc); 227 PHY_WRITE(sc, MII_BMCR, BMCR_PDOWN); 228 return 0; 229 } 230 231 /* Update the media status. */ 232 mii_phy_status(sc); 233 234 /* Callback if something changed. */ 235 mii_phy_update(sc, cmd); 236 return 0; 237 } 238 239 static void 240 ihphy_status(struct mii_softc *sc) 241 { 242 struct mii_data *mii = sc->mii_pdata; 243 int esr, bmcr, gtsr; 244 245 mii->mii_media_status = IFM_AVALID; 246 mii->mii_media_active = IFM_ETHER; 247 248 esr = PHY_READ(sc, IHPHY_MII_ESR); 249 250 if (esr & IHPHY_ESR_LINK) 251 mii->mii_media_status |= IFM_ACTIVE; 252 253 bmcr = PHY_READ(sc, MII_BMCR); 254 if (bmcr & (BMCR_ISO | BMCR_PDOWN)) { 255 mii->mii_media_active |= IFM_NONE; 256 mii->mii_media_status = 0; 257 return; 258 } 259 260 if (bmcr & BMCR_LOOP) 261 mii->mii_media_active |= IFM_LOOP; 262 263 if (bmcr & BMCR_AUTOEN) { 264 if ((esr & IHPHY_ESR_ANEG_STAT) == 0) { 265 /* Erg, still trying, I guess... */ 266 mii->mii_media_active |= IFM_NONE; 267 return; 268 } 269 } 270 271 switch (esr & IHPHY_ESR_SPEED) { 272 case IHPHY_SPEED_1000: 273 mii->mii_media_active |= IFM_1000_T; 274 gtsr = PHY_READ(sc, MII_100T2SR); 275 if (gtsr & GTSR_MS_RES) 276 mii->mii_media_active |= IFM_ETH_MASTER; 277 break; 278 279 case IHPHY_SPEED_100: 280 /* 100BASE-T2 and 100BASE-T4 are not supported. */ 281 mii->mii_media_active |= IFM_100_TX; 282 break; 283 284 case IHPHY_SPEED_10: 285 mii->mii_media_active |= IFM_10_T; 286 break; 287 288 default: 289 mii->mii_media_active |= IFM_NONE; 290 mii->mii_media_status = 0; 291 return; 292 } 293 294 if (esr & IHPHY_ESR_DUPLEX) 295 mii->mii_media_active |= 296 IFM_FDX | mii_phy_flowstatus(sc); 297 } 298 299 static void 300 ihphy_reset(struct mii_softc *sc) 301 { 302 int reg, i; 303 304 PHY_WRITE(sc, MII_BMCR, BMCR_RESET | BMCR_ISO); 305 306 /* 307 * Regarding reset, the data sheet specifies (page 55): 308 * 309 * "After PHY reset, a delay of 10 ms is required before 310 * any register access using MDIO." 311 */ 312 delay(10000); 313 314 /* Wait another 100ms for it to complete. */ 315 for (i = 0; i < 100; i++) { 316 reg = PHY_READ(sc, MII_BMCR); 317 if ((reg & BMCR_RESET) == 0) 318 break; 319 delay(1000); 320 } 321 322 if (sc->mii_inst != 0) 323 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 324 } 325