1 /*- 2 * Copyright (c) 2006 Benno Rice. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 25 #include <sys/cdefs.h> 26 __FBSDID("$FreeBSD$"); 27 28 /* 29 * Driver for the SEEQ 80220 and 84220. 30 * (Originally developed for the internal PHY on the SMSC LAN91C111.) 31 */ 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/socket.h> 37 #include <sys/errno.h> 38 #include <sys/module.h> 39 #include <sys/bus.h> 40 #include <sys/malloc.h> 41 42 #include <machine/bus.h> 43 44 #include <net/if.h> 45 #include <net/if_media.h> 46 47 #include <dev/mii/mii.h> 48 #include <dev/mii/miivar.h> 49 #include "miidevs.h" 50 51 #include "miibus_if.h" 52 53 static int smcphy_probe(device_t); 54 static int smcphy_attach(device_t); 55 56 static int smcphy_service(struct mii_softc *, struct mii_data *, int); 57 static void smcphy_reset(struct mii_softc *); 58 static void smcphy_auto(struct mii_softc *, int); 59 static void smcphy_status(struct mii_softc *); 60 61 static device_method_t smcphy_methods[] = { 62 /* device interface */ 63 DEVMETHOD(device_probe, smcphy_probe), 64 DEVMETHOD(device_attach, smcphy_attach), 65 DEVMETHOD(device_detach, mii_phy_detach), 66 DEVMETHOD(device_shutdown, bus_generic_shutdown), 67 DEVMETHOD_END 68 }; 69 70 static devclass_t smcphy_devclass; 71 72 static driver_t smcphy_driver = { 73 "smcphy", 74 smcphy_methods, 75 sizeof(struct mii_softc) 76 }; 77 78 DRIVER_MODULE(smcphy, miibus, smcphy_driver, smcphy_devclass, 0, 0); 79 80 static const struct mii_phydesc smcphys[] = { 81 MII_PHY_DESC(SEEQ, 80220), 82 MII_PHY_DESC(SEEQ, 84220), 83 MII_PHY_END 84 }; 85 86 static const struct mii_phy_funcs smcphy80220_funcs = { 87 smcphy_service, 88 smcphy_status, 89 mii_phy_reset 90 }; 91 92 static const struct mii_phy_funcs smcphy_funcs = { 93 smcphy_service, 94 smcphy_status, 95 smcphy_reset 96 }; 97 98 static int 99 smcphy_probe(device_t dev) 100 { 101 102 return (mii_phy_dev_probe(dev, smcphys, BUS_PROBE_DEFAULT)); 103 } 104 105 static int 106 smcphy_attach(device_t dev) 107 { 108 struct mii_softc *sc; 109 struct mii_attach_args *ma; 110 const struct mii_phy_funcs *mpf; 111 112 sc = device_get_softc(dev); 113 ma = device_get_ivars(dev); 114 if (MII_MODEL(ma->mii_id2) == MII_MODEL_SEEQ_80220) 115 mpf = &smcphy80220_funcs; 116 else 117 mpf = &smcphy_funcs; 118 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, mpf, 1); 119 mii_phy_setmedia(sc); 120 121 return (0); 122 } 123 124 static int 125 smcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 126 { 127 struct ifmedia_entry *ife; 128 int reg; 129 130 ife = mii->mii_media.ifm_cur; 131 132 switch (cmd) { 133 case MII_POLLSTAT: 134 break; 135 136 case MII_MEDIACHG: 137 /* 138 * If the interface is not up, don't do anything. 139 */ 140 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 141 break; 142 143 switch (IFM_SUBTYPE(ife->ifm_media)) { 144 case IFM_AUTO: 145 smcphy_auto(sc, ife->ifm_media); 146 break; 147 148 default: 149 mii_phy_setmedia(sc); 150 break; 151 } 152 153 break; 154 155 case MII_TICK: 156 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) { 157 return (0); 158 } 159 160 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) { 161 break; 162 } 163 164 /* I have no idea why BMCR_ISO gets set. */ 165 reg = PHY_READ(sc, MII_BMCR); 166 if (reg & BMCR_ISO) { 167 PHY_WRITE(sc, MII_BMCR, reg & ~BMCR_ISO); 168 } 169 170 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 171 if (reg & BMSR_LINK) { 172 sc->mii_ticks = 0; 173 break; 174 } 175 176 if (++sc->mii_ticks <= MII_ANEGTICKS) { 177 break; 178 } 179 180 sc->mii_ticks = 0; 181 PHY_RESET(sc); 182 smcphy_auto(sc, ife->ifm_media); 183 break; 184 } 185 186 /* Update the media status. */ 187 PHY_STATUS(sc); 188 189 /* Callback if something changed. */ 190 mii_phy_update(sc, cmd); 191 return (0); 192 } 193 194 static void 195 smcphy_reset(struct mii_softc *sc) 196 { 197 u_int bmcr; 198 int timeout; 199 200 PHY_WRITE(sc, MII_BMCR, BMCR_RESET); 201 202 for (timeout = 2; timeout > 0; timeout--) { 203 DELAY(50000); 204 bmcr = PHY_READ(sc, MII_BMCR); 205 if ((bmcr & BMCR_RESET) == 0) 206 break; 207 } 208 209 if (bmcr & BMCR_RESET) 210 device_printf(sc->mii_dev, "reset failed\n"); 211 212 PHY_WRITE(sc, MII_BMCR, 0x3000); 213 214 /* Mask interrupts, we poll instead. */ 215 PHY_WRITE(sc, 0x1e, 0xffc0); 216 } 217 218 static void 219 smcphy_auto(struct mii_softc *sc, int media) 220 { 221 uint16_t anar; 222 223 anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA; 224 if ((media & IFM_FLOW) != 0 || (sc->mii_flags & MIIF_FORCEPAUSE) != 0) 225 anar |= ANAR_FC; 226 PHY_WRITE(sc, MII_ANAR, anar); 227 /* Apparently this helps. */ 228 anar = PHY_READ(sc, MII_ANAR); 229 PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 230 } 231 232 static void 233 smcphy_status(struct mii_softc *sc) 234 { 235 struct mii_data *mii; 236 uint32_t bmcr, bmsr, status; 237 238 mii = sc->mii_pdata; 239 mii->mii_media_status = IFM_AVALID; 240 mii->mii_media_active = IFM_ETHER; 241 242 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 243 if ((bmsr & BMSR_LINK) != 0) 244 mii->mii_media_status |= IFM_ACTIVE; 245 246 bmcr = PHY_READ(sc, MII_BMCR); 247 if ((bmcr & BMCR_ISO) != 0) { 248 mii->mii_media_active |= IFM_NONE; 249 mii->mii_media_status = 0; 250 return; 251 } 252 253 if ((bmcr & BMCR_LOOP) != 0) 254 mii->mii_media_active |= IFM_LOOP; 255 256 if ((bmcr & BMCR_AUTOEN) != 0) { 257 if ((bmsr & BMSR_ACOMP) == 0) { 258 /* Erg, still trying, I guess... */ 259 mii->mii_media_active |= IFM_NONE; 260 return; 261 } 262 } 263 264 status = PHY_READ(sc, 0x12); 265 if (status & 0x0080) 266 mii->mii_media_active |= IFM_100_TX; 267 else 268 mii->mii_media_active |= IFM_10_T; 269 if (status & 0x0040) 270 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc); 271 else 272 mii->mii_media_active |= IFM_HDX; 273 } 274