inphy.c revision 74131
1/*- 2 * Copyright (c) 2001 Jonathan Lemon 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the author nor the names of any co-contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: head/sys/dev/mii/inphy.c 74131 2001-03-12 02:41:57Z jlemon $ 30 */ 31 32/* 33 * driver for Intel 82553 and 82555 PHYs 34 */ 35 36#include <sys/param.h> 37#include <sys/systm.h> 38#include <sys/kernel.h> 39#include <sys/malloc.h> 40#include <sys/socket.h> 41#include <sys/bus.h> 42 43#include <net/if.h> 44#include <net/if_media.h> 45 46#include <dev/mii/mii.h> 47#include <dev/mii/miivar.h> 48#include <dev/mii/miidevs.h> 49 50#include <dev/mii/inphyreg.h> 51 52#include "miibus_if.h" 53 54static int inphy_probe(device_t dev); 55static int inphy_attach(device_t dev); 56static int inphy_detach(device_t dev); 57 58static device_method_t inphy_methods[] = { 59 /* device interface */ 60 DEVMETHOD(device_probe, inphy_probe), 61 DEVMETHOD(device_attach, inphy_attach), 62 DEVMETHOD(device_detach, inphy_detach), 63 DEVMETHOD(device_shutdown, bus_generic_shutdown), 64 { 0, 0 } 65}; 66 67static devclass_t inphy_devclass; 68 69static driver_t inphy_driver = { 70 "inphy", 71 inphy_methods, 72 sizeof(struct mii_softc) 73}; 74 75DRIVER_MODULE(inphy, miibus, inphy_driver, inphy_devclass, 0, 0); 76 77int inphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd); 78void inphy_status(struct mii_softc *sc); 79 80 81static int 82inphy_probe(device_t dev) 83{ 84 struct mii_attach_args *ma; 85 device_t parent; 86 87 ma = device_get_ivars(dev); 88 parent = device_get_parent(device_get_parent(dev)); 89 90 /* Intel 82555 */ 91 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_INTEL && 92 MII_MODEL(ma->mii_id2) == MII_MODEL_INTEL_I82555) { 93 device_set_desc(dev, MII_STR_INTEL_I82555); 94 return (0); 95 } 96 97 /* Intel 82553 C stepping */ 98 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_INTEL && 99 MII_MODEL(ma->mii_id2) == MII_MODEL_INTEL_I82553C) { 100 device_set_desc(dev, MII_STR_INTEL_I82553C); 101 return (0); 102 } 103 104 /* Intel 82553 A/B steppings */ 105 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxINTEL && 106 MII_MODEL(ma->mii_id2) == MII_MODEL_xxINTEL_I82553AB) { 107 device_set_desc(dev, MII_STR_xxINTEL_I82553AB); 108 return (0); 109 } 110 111 return (ENXIO); 112} 113 114static int 115inphy_attach(device_t dev) 116{ 117 struct mii_softc *sc; 118 struct mii_attach_args *ma; 119 struct mii_data *mii; 120 121 sc = device_get_softc(dev); 122 ma = device_get_ivars(dev); 123 sc->mii_dev = device_get_parent(dev); 124 mii = device_get_softc(sc->mii_dev); 125 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 126 127 sc->mii_inst = mii->mii_instance; 128 sc->mii_phy = ma->mii_phyno; 129 sc->mii_service = inphy_service; 130 sc->mii_pdata = mii; 131 mii->mii_instance++; 132 133#if 0 134 sc->mii_flags |= MIIF_NOISOLATE; 135#endif 136 137 ifmedia_add(&mii->mii_media, 138 IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 139 BMCR_LOOP|BMCR_S100, NULL); 140 141 mii_phy_reset(sc); 142 143 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 144 device_printf(dev, ""); 145 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 146 printf("no media present"); 147 else 148 mii_add_media(mii, sc->mii_capabilities, sc->mii_inst); 149 printf("\n"); 150 151 MIIBUS_MEDIAINIT(sc->mii_dev); 152 153 return (0); 154} 155 156static int 157inphy_detach(device_t dev) 158{ 159 struct mii_softc *sc; 160 struct mii_data *mii; 161 162 sc = device_get_softc(dev); 163 mii = device_get_softc(device_get_softc(dev)); 164 mii_phy_auto_stop(sc); 165 sc->mii_dev = NULL; 166 LIST_REMOVE(sc, mii_list); 167 168 return (0); 169} 170 171int 172inphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 173{ 174 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 175 int reg; 176 177 switch (cmd) { 178 case MII_POLLSTAT: 179 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 180 return (0); 181 break; 182 183 case MII_MEDIACHG: 184 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 185 reg = PHY_READ(sc, MII_BMCR); 186 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 187 return (0); 188 } 189 190 /* 191 * If the interface is not up, don't do anything. 192 */ 193 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 194 break; 195 196 switch (IFM_SUBTYPE(ife->ifm_media)) { 197 case IFM_AUTO: 198 /* 199 * If we're already in auto mode, just return. 200 */ 201 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 202 return (0); 203 (void) mii_phy_auto(sc, 0); 204 break; 205 case IFM_100_T4: 206 /* 207 * XXX Not supported as a manual setting right now. 208 */ 209 return (EINVAL); 210 default: 211 /* 212 * BMCR data is stored in the ifmedia entry. 213 */ 214 PHY_WRITE(sc, MII_ANAR, mii_anar(ife->ifm_media)); 215 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 216 } 217 break; 218 219 case MII_TICK: 220 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 221 return (0); 222 223 /* 224 * Is the interface even up? 225 */ 226 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 227 return (0); 228 229 /* 230 * Only used for autonegotiation. 231 */ 232 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 233 return (0); 234 235 /* 236 * check for link. 237 * Read the status register twice; BMSR_LINK is latch-low. 238 */ 239 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 240 if (reg & BMSR_LINK) 241 return (0); 242 243 /* 244 * Only retry autonegotiation every 5 seconds. 245 */ 246 if (++sc->mii_ticks != 5) 247 return (0); 248 249 sc->mii_ticks = 0; 250 mii_phy_reset(sc); 251 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 252 return (0); 253 break; 254 } 255 256 /* Update the media status. */ 257 inphy_status(sc); 258 259 /* Callback if something changed. */ 260 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 261 MIIBUS_STATCHG(sc->mii_dev); 262 sc->mii_active = mii->mii_media_active; 263 } 264 return (0); 265} 266 267void 268inphy_status(struct mii_softc *sc) 269{ 270 struct mii_data *mii = sc->mii_pdata; 271 int bmsr, bmcr, scr; 272 273 mii->mii_media_status = IFM_AVALID; 274 mii->mii_media_active = IFM_ETHER; 275 276 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 277 if (bmsr & BMSR_LINK) 278 mii->mii_media_status |= IFM_ACTIVE; 279 280 bmcr = PHY_READ(sc, MII_BMCR); 281 if (bmcr & BMCR_ISO) { 282 mii->mii_media_active |= IFM_NONE; 283 mii->mii_media_status = 0; 284 return; 285 } 286 287 if (bmcr & BMCR_LOOP) 288 mii->mii_media_active |= IFM_LOOP; 289 290 if (bmcr & BMCR_AUTOEN) { 291 if ((bmsr & BMSR_ACOMP) == 0) { 292 mii->mii_media_active |= IFM_NONE; 293 return; 294 } 295 296 scr = PHY_READ(sc, MII_INPHY_SCR); 297 if (scr & SCR_S100) 298 mii->mii_media_active |= IFM_100_TX; 299 else 300 mii->mii_media_active |= IFM_10_T; 301 if (scr & SCR_FDX) 302 mii->mii_media_active |= IFM_FDX; 303 } else 304 mii->mii_media_active |= mii_media_from_bmcr(bmcr); 305} 306