amphy.c revision 119418
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 33#include <sys/cdefs.h> 34__FBSDID("$FreeBSD: head/sys/dev/mii/amphy.c 119418 2003-08-24 17:55:58Z obrien $"); 35 36/* 37 * driver for AMD AM79c873 PHYs 38 * This driver also works for the Davicom DM9101 PHY, which appears to 39 * be an AM79c873 workalike. 40 */ 41 42#include <sys/cdefs.h> 43__FBSDID("$FreeBSD: head/sys/dev/mii/amphy.c 119418 2003-08-24 17:55:58Z obrien $"); 44 45#include <sys/param.h> 46#include <sys/systm.h> 47#include <sys/kernel.h> 48#include <sys/socket.h> 49#include <sys/bus.h> 50 51#include <net/if.h> 52#include <net/if_media.h> 53 54#include <dev/mii/mii.h> 55#include <dev/mii/miivar.h> 56#include "miidevs.h" 57 58#include <dev/mii/amphyreg.h> 59 60#include "miibus_if.h" 61 62static int amphy_probe(device_t); 63static int amphy_attach(device_t); 64 65static device_method_t amphy_methods[] = { 66 /* device interface */ 67 DEVMETHOD(device_probe, amphy_probe), 68 DEVMETHOD(device_attach, amphy_attach), 69 DEVMETHOD(device_detach, mii_phy_detach), 70 DEVMETHOD(device_shutdown, bus_generic_shutdown), 71 { 0, 0 } 72}; 73 74static devclass_t amphy_devclass; 75 76static driver_t amphy_driver = { 77 "amphy", 78 amphy_methods, 79 sizeof(struct mii_softc) 80}; 81 82DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, 0, 0); 83 84static int amphy_service(struct mii_softc *, struct mii_data *, int); 85static void amphy_status(struct mii_softc *); 86 87static int 88amphy_probe(dev) 89 device_t dev; 90{ 91 struct mii_attach_args *ma; 92 93 ma = device_get_ivars(dev); 94 95 if ((MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxAMD || 96 MII_MODEL(ma->mii_id2) != MII_MODEL_xxAMD_79C873) && 97 (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxDAVICOM || 98 MII_MODEL(ma->mii_id2) != MII_MODEL_xxDAVICOM_DM9101)) 99 return(ENXIO); 100 101 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxAMD) 102 device_set_desc(dev, MII_STR_xxAMD_79C873); 103 else if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxDAVICOM) 104 device_set_desc(dev, MII_STR_xxDAVICOM_DM9101); 105 106 return(0); 107} 108 109static int 110amphy_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 mii_add_media(sc); 146 printf("\n"); 147#undef ADD 148 MIIBUS_MEDIAINIT(sc->mii_dev); 149 return(0); 150} 151 152static int 153amphy_service(sc, mii, cmd) 154 struct mii_softc *sc; 155 struct mii_data *mii; 156 int cmd; 157{ 158 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 159 int reg; 160 161 switch (cmd) { 162 case MII_POLLSTAT: 163 /* 164 * If we're not polling our PHY instance, just return. 165 */ 166 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 167 return (0); 168 break; 169 170 case MII_MEDIACHG: 171 /* 172 * If the media indicates a different PHY instance, 173 * isolate ourselves. 174 */ 175 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 176 reg = PHY_READ(sc, MII_BMCR); 177 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 178 return (0); 179 } 180 181 /* 182 * If the interface is not up, don't do anything. 183 */ 184 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 185 break; 186 187 switch (IFM_SUBTYPE(ife->ifm_media)) { 188 case IFM_AUTO: 189 /* 190 * If we're already in auto mode, just return. 191 */ 192 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 193 return (0); 194 (void) mii_phy_auto(sc); 195 break; 196 case IFM_100_T4: 197 /* 198 * XXX Not supported as a manual setting right now. 199 */ 200 return (EINVAL); 201 default: 202 /* 203 * BMCR data is stored in the ifmedia entry. 204 */ 205 PHY_WRITE(sc, MII_ANAR, 206 mii_anar(ife->ifm_media)); 207 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 208 } 209 break; 210 211 case MII_TICK: 212 /* 213 * If we're not currently selected, just return. 214 */ 215 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 216 return (0); 217 if (mii_phy_tick(sc) == EJUSTRETURN) 218 return (0); 219 break; 220 } 221 222 /* Update the media status. */ 223 amphy_status(sc); 224 225 /* Callback if something changed. */ 226 mii_phy_update(sc, cmd); 227 return (0); 228} 229 230static void 231amphy_status(sc) 232 struct mii_softc *sc; 233{ 234 struct mii_data *mii = sc->mii_pdata; 235 int bmsr, bmcr, par, anlpar; 236 237 mii->mii_media_status = IFM_AVALID; 238 mii->mii_media_active = IFM_ETHER; 239 240 bmsr = PHY_READ(sc, MII_BMSR) | 241 PHY_READ(sc, MII_BMSR); 242 if (bmsr & BMSR_LINK) 243 mii->mii_media_status |= IFM_ACTIVE; 244 245 bmcr = PHY_READ(sc, MII_BMCR); 246 if (bmcr & BMCR_ISO) { 247 mii->mii_media_active |= IFM_NONE; 248 mii->mii_media_status = 0; 249 return; 250 } 251 252 if (bmcr & BMCR_LOOP) 253 mii->mii_media_active |= IFM_LOOP; 254 255 if (bmcr & BMCR_AUTOEN) { 256 /* 257 * The PAR status bits are only valid of autonegotiation 258 * has completed (or it's disabled). 259 */ 260 if ((bmsr & BMSR_ACOMP) == 0) { 261 /* Erg, still trying, I guess... */ 262 mii->mii_media_active |= IFM_NONE; 263 return; 264 } 265 266 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 267 anlpar = PHY_READ(sc, MII_ANAR) & 268 PHY_READ(sc, MII_ANLPAR); 269 if (anlpar & ANLPAR_T4) 270 mii->mii_media_active |= IFM_100_T4; 271 else if (anlpar & ANLPAR_TX_FD) 272 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 273 else if (anlpar & ANLPAR_TX) 274 mii->mii_media_active |= IFM_100_TX; 275 else if (anlpar & ANLPAR_10_FD) 276 mii->mii_media_active |= IFM_10_T|IFM_FDX; 277 else if (anlpar & ANLPAR_10) 278 mii->mii_media_active |= IFM_10_T; 279 else 280 mii->mii_media_active |= IFM_NONE; 281 return; 282 } 283 284 /* 285 * Link partner is not capable of autonegotiation. 286 */ 287 par = PHY_READ(sc, MII_AMPHY_DSCSR); 288 if (par & DSCSR_100FDX) 289 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 290 else if (par & DSCSR_100HDX) 291 mii->mii_media_active |= IFM_100_TX; 292 else if (par & DSCSR_10FDX) 293 mii->mii_media_active |= IFM_10_T|IFM_HDX; 294 else if (par & DSCSR_10HDX) 295 mii->mii_media_active |= IFM_10_T; 296 } else 297 mii->mii_media_active = mii_media_from_bmcr(bmcr); 298} 299