amphy.c revision 84145
1/* 2 * Copyright (c) 1997, 1998, 1999 3 * Bill Paul <wpaul@ee.columbia.edu>. 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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Bill Paul. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 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 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 * 32 * $FreeBSD: head/sys/dev/mii/amphy.c 84145 2001-09-29 19:18:52Z jlemon $ 33 */ 34 35/* 36 * driver for AMD AM79c873 PHYs 37 * This driver also works for the Davicom DM9101 PHY, which appears to 38 * be an AM79c873 workalike. 39 */ 40 41#include <sys/param.h> 42#include <sys/systm.h> 43#include <sys/kernel.h> 44#include <sys/socket.h> 45#include <sys/bus.h> 46 47#include <net/if.h> 48#include <net/if_media.h> 49 50#include <dev/mii/mii.h> 51#include <dev/mii/miivar.h> 52#include <dev/mii/miidevs.h> 53 54#include <dev/mii/amphyreg.h> 55 56#include "miibus_if.h" 57 58#if !defined(lint) 59static const char rcsid[] = 60 "$FreeBSD: head/sys/dev/mii/amphy.c 84145 2001-09-29 19:18:52Z jlemon $"; 61#endif 62 63static int amphy_probe __P((device_t)); 64static int amphy_attach __P((device_t)); 65static int amphy_detach __P((device_t)); 66 67static device_method_t amphy_methods[] = { 68 /* device interface */ 69 DEVMETHOD(device_probe, amphy_probe), 70 DEVMETHOD(device_attach, amphy_attach), 71 DEVMETHOD(device_detach, amphy_detach), 72 DEVMETHOD(device_shutdown, bus_generic_shutdown), 73 { 0, 0 } 74}; 75 76static devclass_t amphy_devclass; 77 78static driver_t amphy_driver = { 79 "amphy", 80 amphy_methods, 81 sizeof(struct mii_softc) 82}; 83 84DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, 0, 0); 85 86static int amphy_service __P((struct mii_softc *, struct mii_data *, int)); 87static void amphy_status __P((struct mii_softc *)); 88 89static int amphy_probe(dev) 90 device_t dev; 91{ 92 struct mii_attach_args *ma; 93 94 ma = device_get_ivars(dev); 95 96 if ((MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxAMD || 97 MII_MODEL(ma->mii_id2) != MII_MODEL_xxAMD_79C873) && 98 (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxDAVICOM || 99 MII_MODEL(ma->mii_id2) != MII_MODEL_xxDAVICOM_DM9101)) 100 return(ENXIO); 101 102 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxAMD) 103 device_set_desc(dev, MII_STR_xxAMD_79C873); 104 else if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxDAVICOM) 105 device_set_desc(dev, MII_STR_xxDAVICOM_DM9101); 106 107 return(0); 108} 109 110static int amphy_attach(dev) 111 device_t dev; 112{ 113 struct mii_softc *sc; 114 struct mii_attach_args *ma; 115 struct mii_data *mii; 116 117 sc = device_get_softc(dev); 118 ma = device_get_ivars(dev); 119 sc->mii_dev = device_get_parent(dev); 120 mii = device_get_softc(sc->mii_dev); 121 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 122 123 sc->mii_inst = mii->mii_instance; 124 sc->mii_phy = ma->mii_phyno; 125 sc->mii_service = amphy_service; 126 sc->mii_pdata = mii; 127 128 sc->mii_flags |= MIIF_NOISOLATE; 129 mii->mii_instance++; 130 131#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 132 133 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 134 BMCR_ISO); 135#if 0 136 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 137 BMCR_LOOP|BMCR_S100); 138#endif 139 140 mii_phy_reset(sc); 141 142 sc->mii_capabilities = 143 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, 149 sc->mii_inst); 150 printf("\n"); 151#undef ADD 152 MIIBUS_MEDIAINIT(sc->mii_dev); 153 return(0); 154} 155 156static int amphy_detach(dev) 157 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_parent(dev)); 164 mii_phy_auto_stop(sc); 165 sc->mii_dev = NULL; 166 LIST_REMOVE(sc, mii_list); 167 168 return(0); 169} 170 171static int 172amphy_service(sc, mii, cmd) 173 struct mii_softc *sc; 174 struct mii_data *mii; 175 int cmd; 176{ 177 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 178 int reg; 179 180 switch (cmd) { 181 case MII_POLLSTAT: 182 /* 183 * If we're not polling our PHY instance, just return. 184 */ 185 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 186 return (0); 187 break; 188 189 case MII_MEDIACHG: 190 /* 191 * If the media indicates a different PHY instance, 192 * isolate ourselves. 193 */ 194 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 195 reg = PHY_READ(sc, MII_BMCR); 196 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 197 return (0); 198 } 199 200 /* 201 * If the interface is not up, don't do anything. 202 */ 203 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 204 break; 205 206 switch (IFM_SUBTYPE(ife->ifm_media)) { 207 case IFM_AUTO: 208 /* 209 * If we're already in auto mode, just return. 210 */ 211 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 212 return (0); 213 (void) mii_phy_auto(sc, 1); 214 break; 215 case IFM_100_T4: 216 /* 217 * XXX Not supported as a manual setting right now. 218 */ 219 return (EINVAL); 220 default: 221 /* 222 * BMCR data is stored in the ifmedia entry. 223 */ 224 PHY_WRITE(sc, MII_ANAR, 225 mii_anar(ife->ifm_media)); 226 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 227 } 228 break; 229 230 case MII_TICK: 231 /* 232 * If we're not currently selected, just return. 233 */ 234 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 235 return (0); 236 if (mii_phy_tick(sc) == EJUSTRETURN) 237 return (0); 238 break; 239 } 240 241 /* Update the media status. */ 242 amphy_status(sc); 243 244 /* Callback if something changed. */ 245 mii_phy_update(sc, cmd); 246 return (0); 247} 248 249static void 250amphy_status(sc) 251 struct mii_softc *sc; 252{ 253 struct mii_data *mii = sc->mii_pdata; 254 int bmsr, bmcr, par, anlpar; 255 256 mii->mii_media_status = IFM_AVALID; 257 mii->mii_media_active = IFM_ETHER; 258 259 bmsr = PHY_READ(sc, MII_BMSR) | 260 PHY_READ(sc, MII_BMSR); 261 if (bmsr & BMSR_LINK) 262 mii->mii_media_status |= IFM_ACTIVE; 263 264 bmcr = PHY_READ(sc, MII_BMCR); 265 if (bmcr & BMCR_ISO) { 266 mii->mii_media_active |= IFM_NONE; 267 mii->mii_media_status = 0; 268 return; 269 } 270 271 if (bmcr & BMCR_LOOP) 272 mii->mii_media_active |= IFM_LOOP; 273 274 if (bmcr & BMCR_AUTOEN) { 275 /* 276 * The PAR status bits are only valid of autonegotiation 277 * has completed (or it's disabled). 278 */ 279 if ((bmsr & BMSR_ACOMP) == 0) { 280 /* Erg, still trying, I guess... */ 281 mii->mii_media_active |= IFM_NONE; 282 return; 283 } 284 285 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 286 anlpar = PHY_READ(sc, MII_ANAR) & 287 PHY_READ(sc, MII_ANLPAR); 288 if (anlpar & ANLPAR_T4) 289 mii->mii_media_active |= IFM_100_T4; 290 else if (anlpar & ANLPAR_TX_FD) 291 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 292 else if (anlpar & ANLPAR_TX) 293 mii->mii_media_active |= IFM_100_TX; 294 else if (anlpar & ANLPAR_10_FD) 295 mii->mii_media_active |= IFM_10_T|IFM_FDX; 296 else if (anlpar & ANLPAR_10) 297 mii->mii_media_active |= IFM_10_T; 298 else 299 mii->mii_media_active |= IFM_NONE; 300 return; 301 } 302 303 /* 304 * Link partner is not capable of autonegotiation. 305 */ 306 par = PHY_READ(sc, MII_AMPHY_DSCSR); 307 if (par & DSCSR_100FDX) 308 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 309 else if (par & DSCSR_100HDX) 310 mii->mii_media_active |= IFM_100_TX; 311 else if (par & DSCSR_10FDX) 312 mii->mii_media_active |= IFM_10_T|IFM_HDX; 313 else if (par & DSCSR_10HDX) 314 mii->mii_media_active |= IFM_10_T; 315 } else 316 mii->mii_media_active = mii_media_from_bmcr(bmcr); 317} 318