amphy.c revision 213229
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 213229 2010-09-27 20:31:03Z marius $"); 35 36/* 37 * driver for AMD AM79c873 PHYs 38 * This driver also works for Davicom DM910{1,2} PHYs, which appear 39 * to be AM79c873 workalikes. 40 */ 41 42#include <sys/param.h> 43#include <sys/systm.h> 44#include <sys/kernel.h> 45#include <sys/module.h> 46#include <sys/socket.h> 47#include <sys/bus.h> 48 49#include <net/if.h> 50#include <net/if_media.h> 51 52#include <dev/mii/mii.h> 53#include <dev/mii/miivar.h> 54#include "miidevs.h" 55 56#include <dev/mii/amphyreg.h> 57 58#include "miibus_if.h" 59 60static int amphy_probe(device_t); 61static int amphy_attach(device_t); 62 63static device_method_t amphy_methods[] = { 64 /* device interface */ 65 DEVMETHOD(device_probe, amphy_probe), 66 DEVMETHOD(device_attach, amphy_attach), 67 DEVMETHOD(device_detach, mii_phy_detach), 68 DEVMETHOD(device_shutdown, bus_generic_shutdown), 69 { 0, 0 } 70}; 71 72static devclass_t amphy_devclass; 73 74static driver_t amphy_driver = { 75 "amphy", 76 amphy_methods, 77 sizeof(struct mii_softc) 78}; 79 80DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, 0, 0); 81 82static int amphy_service(struct mii_softc *, struct mii_data *, int); 83static void amphy_status(struct mii_softc *); 84 85static const struct mii_phydesc amphys[] = { 86 MII_PHY_DESC(DAVICOM, DM9102), 87 MII_PHY_DESC(xxAMD, 79C873), 88 MII_PHY_DESC(xxDAVICOM, DM9101), 89 MII_PHY_END 90}; 91 92static int 93amphy_probe(device_t dev) 94{ 95 96 return (mii_phy_dev_probe(dev, amphys, BUS_PROBE_DEFAULT)); 97} 98 99static int 100amphy_attach(device_t dev) 101{ 102 struct mii_softc *sc; 103 struct mii_attach_args *ma; 104 struct mii_data *mii; 105 106 sc = device_get_softc(dev); 107 ma = device_get_ivars(dev); 108 sc->mii_dev = device_get_parent(dev); 109 mii = ma->mii_data; 110 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 111 112 sc->mii_inst = mii->mii_instance; 113 sc->mii_phy = ma->mii_phyno; 114 sc->mii_service = amphy_service; 115 sc->mii_pdata = mii; 116 117 mii->mii_instance++; 118 119#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 120 121#if 0 122 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 123 MII_MEDIA_100_TX); 124#endif 125 126 mii_phy_reset(sc); 127 128 sc->mii_capabilities = 129 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 130 device_printf(dev, " "); 131 mii_phy_add_media(sc); 132 printf("\n"); 133#undef ADD 134 MIIBUS_MEDIAINIT(sc->mii_dev); 135 return (0); 136} 137 138static int 139amphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 140{ 141 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 142 int reg; 143 144 switch (cmd) { 145 case MII_POLLSTAT: 146 /* 147 * If we're not polling our PHY instance, just return. 148 */ 149 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 150 return (0); 151 break; 152 153 case MII_MEDIACHG: 154 /* 155 * If the media indicates a different PHY instance, 156 * isolate ourselves. 157 */ 158 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 159 reg = PHY_READ(sc, MII_BMCR); 160 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 161 return (0); 162 } 163 164 /* 165 * If the interface is not up, don't do anything. 166 */ 167 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 168 break; 169 170 mii_phy_setmedia(sc); 171 break; 172 173 case MII_TICK: 174 /* 175 * If we're not currently selected, just return. 176 */ 177 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 178 return (0); 179 if (mii_phy_tick(sc) == EJUSTRETURN) 180 return (0); 181 break; 182 } 183 184 /* Update the media status. */ 185 amphy_status(sc); 186 187 /* Callback if something changed. */ 188 mii_phy_update(sc, cmd); 189 return (0); 190} 191 192static void 193amphy_status(struct mii_softc *sc) 194{ 195 struct mii_data *mii = sc->mii_pdata; 196 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 197 int bmsr, bmcr, par, anlpar; 198 199 mii->mii_media_status = IFM_AVALID; 200 mii->mii_media_active = IFM_ETHER; 201 202 bmsr = PHY_READ(sc, MII_BMSR) | 203 PHY_READ(sc, MII_BMSR); 204 if (bmsr & BMSR_LINK) 205 mii->mii_media_status |= IFM_ACTIVE; 206 207 bmcr = PHY_READ(sc, MII_BMCR); 208 if (bmcr & BMCR_ISO) { 209 mii->mii_media_active |= IFM_NONE; 210 mii->mii_media_status = 0; 211 return; 212 } 213 214 if (bmcr & BMCR_LOOP) 215 mii->mii_media_active |= IFM_LOOP; 216 217 if (bmcr & BMCR_AUTOEN) { 218 /* 219 * The PAR status bits are only valid if autonegotiation 220 * has completed (or it's disabled). 221 */ 222 if ((bmsr & BMSR_ACOMP) == 0) { 223 /* Erg, still trying, I guess... */ 224 mii->mii_media_active |= IFM_NONE; 225 return; 226 } 227 228 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 229 anlpar = PHY_READ(sc, MII_ANAR) & 230 PHY_READ(sc, MII_ANLPAR); 231 if (anlpar & ANLPAR_TX_FD) 232 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 233 else if (anlpar & ANLPAR_T4) 234 mii->mii_media_active |= IFM_100_T4; 235 else if (anlpar & ANLPAR_TX) 236 mii->mii_media_active |= IFM_100_TX; 237 else if (anlpar & ANLPAR_10_FD) 238 mii->mii_media_active |= IFM_10_T|IFM_FDX; 239 else if (anlpar & ANLPAR_10) 240 mii->mii_media_active |= IFM_10_T; 241 else 242 mii->mii_media_active |= IFM_NONE; 243 return; 244 } 245 246 /* 247 * Link partner is not capable of autonegotiation. 248 */ 249 par = PHY_READ(sc, MII_AMPHY_DSCSR); 250 if (par & DSCSR_100FDX) 251 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 252 else if (par & DSCSR_100HDX) 253 mii->mii_media_active |= IFM_100_TX; 254 else if (par & DSCSR_10FDX) 255 mii->mii_media_active |= IFM_10_T|IFM_HDX; 256 else if (par & DSCSR_10HDX) 257 mii->mii_media_active |= IFM_10_T; 258 } else 259 mii->mii_media_active = ife->ifm_media; 260} 261