gentbi.c revision 1.27.28.2
1 /* $NetBSD: gentbi.c,v 1.27.28.2 2020/04/08 14:08:08 martin 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 * 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 generic ten-bit (1000BASE-SX) interfaces, built into 59 * many Gigabit Ethernet chips. 60 * 61 * All we have to do here is correctly report speed and duplex. 62 */ 63 64 #include <sys/cdefs.h> 65 __KERNEL_RCSID(0, "$NetBSD: gentbi.c,v 1.27.28.2 2020/04/08 14:08:08 martin Exp $"); 66 67 #include <sys/param.h> 68 #include <sys/systm.h> 69 #include <sys/kernel.h> 70 #include <sys/device.h> 71 #include <sys/socket.h> 72 #include <sys/errno.h> 73 74 #include <net/if.h> 75 #include <net/if_media.h> 76 77 #include <dev/mii/mii.h> 78 #include <dev/mii/miivar.h> 79 #include <dev/mii/miidevs.h> 80 81 static int gentbimatch(device_t, cfdata_t, void *); 82 static void gentbiattach(device_t, device_t, void *); 83 84 CFATTACH_DECL_NEW(gentbi, sizeof(struct mii_softc), 85 gentbimatch, gentbiattach, mii_phy_detach, mii_phy_activate); 86 87 static int gentbi_service(struct mii_softc *, struct mii_data *, int); 88 static void gentbi_status(struct mii_softc *); 89 90 static const struct mii_phy_funcs gentbi_funcs = { 91 gentbi_service, gentbi_status, mii_phy_reset, 92 }; 93 94 static int 95 gentbimatch(device_t parent, cfdata_t match, void *aux) 96 { 97 struct mii_attach_args *ma = aux; 98 struct mii_data *mii = ma->mii_data; 99 int rv; 100 uint16_t bmsr, extsr; 101 102 /* 103 * We match as a generic TBI if: 104 * 105 * - There is no media in the BMSR. 106 * - EXTSR has only 1000X. 107 */ 108 mii_lock(mii); 109 rv = (*mii->mii_readreg)(parent, ma->mii_phyno, MII_BMSR, &bmsr); 110 if ((rv != 0) 111 || (bmsr & BMSR_EXTSTAT) == 0 || (bmsr & BMSR_MEDIAMASK) != 0) { 112 mii_unlock(mii); 113 return 0; 114 } 115 116 rv = (*mii->mii_readreg)(parent, ma->mii_phyno, MII_EXTSR, &extsr); 117 if ((rv != 0) || ((extsr & (EXTSR_1000TFDX | EXTSR_1000THDX)) != 0)) { 118 mii_unlock(mii); 119 return 0; 120 } 121 mii_unlock(mii); 122 123 if (extsr & (EXTSR_1000XFDX | EXTSR_1000XHDX)) { 124 /* 125 * We think this is a generic TBI. Return a match 126 * priority higher than ukphy, but lower than what 127 * specific drivers will return. 128 */ 129 return 2; 130 } 131 132 return 0; 133 } 134 135 static void 136 gentbiattach(device_t parent, device_t self, void *aux) 137 { 138 struct mii_softc *sc = device_private(self); 139 struct mii_attach_args *ma = aux; 140 struct mii_data *mii = ma->mii_data; 141 int oui = MII_OUI(ma->mii_id1, ma->mii_id2); 142 int model = MII_MODEL(ma->mii_id2); 143 int rev = MII_REV(ma->mii_id2); 144 const char *descr; 145 146 if ((descr = mii_get_descr(oui, model)) != NULL) 147 aprint_normal(": %s (OUI 0x%06x, model 0x%04x), rev. %d\n", 148 descr, oui, model, rev); 149 else 150 aprint_normal(": OUI 0x%06x, model 0x%04x, rev. %d\n", 151 oui, model, rev); 152 153 aprint_naive(": Generic ten-bit interface\n"); 154 155 sc->mii_dev = self; 156 sc->mii_inst = mii->mii_instance; 157 sc->mii_phy = ma->mii_phyno; 158 sc->mii_mpd_oui = oui; 159 sc->mii_mpd_model = model; 160 sc->mii_mpd_rev = rev; 161 sc->mii_funcs = &gentbi_funcs; 162 sc->mii_pdata = mii; 163 sc->mii_flags = ma->mii_flags; 164 165 mii_lock(mii); 166 167 PHY_RESET(sc); 168 169 /* 170 * Mask out all media in the BMSR. We only are really interested 171 * in "auto". 172 */ 173 PHY_READ(sc, MII_BMSR, &sc->mii_capabilities); 174 sc->mii_capabilities = 175 sc->mii_capabilities & ma->mii_capmask & ~BMSR_MEDIAMASK; 176 if (sc->mii_capabilities & BMSR_EXTSTAT) 177 PHY_READ(sc, MII_EXTSR, &sc->mii_extcapabilities); 178 179 mii_unlock(mii); 180 181 mii_phy_add_media(sc); 182 } 183 184 static int 185 gentbi_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 186 { 187 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 188 uint16_t reg; 189 190 KASSERT(mii_locked(mii)); 191 192 switch (cmd) { 193 case MII_POLLSTAT: 194 /* If we're not polling our PHY instance, just return. */ 195 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 196 return 0; 197 break; 198 199 case MII_MEDIACHG: 200 /* 201 * If the media indicates a different PHY instance, 202 * isolate ourselves. 203 */ 204 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 205 PHY_READ(sc, MII_BMCR, ®); 206 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 207 return 0; 208 } 209 210 /* If the interface is not up, don't do anything. */ 211 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 212 break; 213 214 mii_phy_setmedia(sc); 215 break; 216 217 case MII_TICK: 218 /* If we're not currently selected, just return. */ 219 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 220 return 0; 221 222 if (mii_phy_tick(sc) == EJUSTRETURN) 223 return 0; 224 break; 225 226 case MII_DOWN: 227 mii_phy_down(sc); 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 gentbi_status(struct mii_softc *sc) 241 { 242 struct mii_data *mii = sc->mii_pdata; 243 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 244 uint16_t bmsr, bmcr, anlpar; 245 246 KASSERT(mii_locked(mii)); 247 248 mii->mii_media_status = IFM_AVALID; 249 mii->mii_media_active = IFM_ETHER; 250 251 PHY_READ(sc, MII_BMSR, &bmsr); 252 PHY_READ(sc, MII_BMSR, &bmsr); 253 254 if (bmsr & BMSR_LINK) 255 mii->mii_media_status |= IFM_ACTIVE; 256 257 PHY_READ(sc, MII_BMCR, &bmcr); 258 if (bmcr & BMCR_ISO) { 259 mii->mii_media_active |= IFM_NONE; 260 mii->mii_media_status = 0; 261 return; 262 } 263 264 if (bmcr & BMCR_LOOP) 265 mii->mii_media_active |= IFM_LOOP; 266 267 if (bmcr & BMCR_AUTOEN) { 268 /* 269 * The media status bits are only valid if autonegotiation 270 * has completed (or it's disabled). 271 */ 272 if ((bmsr & BMSR_ACOMP) == 0) { 273 /* Erg, still trying, I guess... */ 274 mii->mii_media_active |= IFM_NONE; 275 return; 276 } 277 278 /* 279 * The media is always 1000baseSX. Check the ANLPAR to 280 * see if we're doing full-duplex. 281 */ 282 mii->mii_media_active |= IFM_1000_SX; 283 284 PHY_READ(sc, MII_ANLPAR, &anlpar); 285 if ((sc->mii_extcapabilities & EXTSR_1000XFDX) != 0 && 286 (anlpar & ANLPAR_X_FD) != 0) 287 mii->mii_media_active |= 288 IFM_FDX | mii_phy_flowstatus(sc); 289 else 290 mii->mii_media_active |= IFM_HDX; 291 } else 292 mii->mii_media_active = ife->ifm_media; 293 } 294
Indexes created Wed Oct 29 18:09:52 GMT 2025