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 internal PHY on the SMSC LAN91C111. 30 */ 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/kernel.h> 35#include <sys/socket.h> 36#include <sys/errno.h> 37#include <sys/module.h> 38#include <sys/bus.h> 39#include <sys/malloc.h> 40 41#include <machine/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 "miidevs.h" 49 50#include "miibus_if.h" 51 52static int smcphy_probe(device_t); 53static int smcphy_attach(device_t); 54 55static int smcphy_service(struct mii_softc *, struct mii_data *, int); 56static void smcphy_reset(struct mii_softc *); 57static void smcphy_auto(struct mii_softc *, int); 58static void smcphy_status(struct mii_softc *); 59 60static device_method_t smcphy_methods[] = { 61 /* device interface */ 62 DEVMETHOD(device_probe, smcphy_probe), 63 DEVMETHOD(device_attach, smcphy_attach), 64 DEVMETHOD(device_detach, mii_phy_detach), 65 DEVMETHOD(device_shutdown, bus_generic_shutdown), 66 DEVMETHOD_END 67}; 68 69static devclass_t smcphy_devclass; 70 71static driver_t smcphy_driver = { 72 "smcphy", 73 smcphy_methods, 74 sizeof(struct mii_softc) 75}; 76 77DRIVER_MODULE(smcphy, miibus, smcphy_driver, smcphy_devclass, 0, 0); 78 79static const struct mii_phydesc smcphys[] = { 80 MII_PHY_DESC(SEEQ, 80220), 81 MII_PHY_DESC(SEEQ, 84220), 82 MII_PHY_END 83}; 84 85static const struct mii_phy_funcs smcphy80220_funcs = { 86 smcphy_service, 87 smcphy_status, 88 mii_phy_reset 89}; 90 91static const struct mii_phy_funcs smcphy_funcs = { 92 smcphy_service, 93 smcphy_status, 94 smcphy_reset 95}; 96 97static int 98smcphy_probe(device_t dev) 99{ 100 101 return (mii_phy_dev_probe(dev, smcphys, BUS_PROBE_DEFAULT)); 102} 103 104static int 105smcphy_attach(device_t dev) 106{ 107 struct mii_softc *sc; 108 struct mii_attach_args *ma; 109 const struct mii_phy_funcs *mpf; 110 111 sc = device_get_softc(dev); 112 ma = device_get_ivars(dev); 113 if (MII_MODEL(ma->mii_id2) == MII_MODEL_SEEQ_80220) 114 mpf = &smcphy80220_funcs; 115 else 116 mpf = &smcphy_funcs; 117 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, mpf, 1); 118 mii_phy_setmedia(sc); 119 120 return (0); 121} 122 123static int 124smcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 125{ 126 struct ifmedia_entry *ife; 127 int reg; 128 129 ife = mii->mii_media.ifm_cur; 130 131 switch (cmd) { 132 case MII_POLLSTAT: 133 break; 134 135 case MII_MEDIACHG: 136 /* 137 * If the interface is not up, don't do anything. 138 */ 139 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 140 break; 141 142 switch (IFM_SUBTYPE(ife->ifm_media)) { 143 case IFM_AUTO: 144 smcphy_auto(sc, ife->ifm_media); 145 break; 146 147 default: 148 mii_phy_setmedia(sc); 149 break; 150 } 151 152 break; 153 154 case MII_TICK: 155 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) { 156 return (0); 157 } 158 159 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) { 160 break; 161 } 162 163 /* I have no idea why BMCR_ISO gets set. */ 164 reg = PHY_READ(sc, MII_BMCR); 165 if (reg & BMCR_ISO) { 166 PHY_WRITE(sc, MII_BMCR, reg & ~BMCR_ISO); 167 } 168 169 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 170 if (reg & BMSR_LINK) { 171 sc->mii_ticks = 0; 172 break; 173 } 174 175 if (++sc->mii_ticks <= MII_ANEGTICKS) { 176 break; 177 } 178 179 sc->mii_ticks = 0; 180 PHY_RESET(sc); 181 smcphy_auto(sc, ife->ifm_media); 182 break; 183 } 184 185 /* Update the media status. */ 186 PHY_STATUS(sc); 187 188 /* Callback if something changed. */ 189 mii_phy_update(sc, cmd); 190 return (0); 191} 192 193static void 194smcphy_reset(struct mii_softc *sc) 195{ 196 u_int bmcr; 197 int timeout; 198 199 PHY_WRITE(sc, MII_BMCR, BMCR_RESET); 200 201 for (timeout = 2; timeout > 0; timeout--) { 202 DELAY(50000); 203 bmcr = PHY_READ(sc, MII_BMCR); 204 if ((bmcr & BMCR_RESET) == 0) 205 break; 206 } 207 208 if (bmcr & BMCR_RESET) 209 device_printf(sc->mii_dev, "reset failed\n"); 210 211 PHY_WRITE(sc, MII_BMCR, 0x3000); 212 213 /* Mask interrupts, we poll instead. */ 214 PHY_WRITE(sc, 0x1e, 0xffc0); 215} 216 217static void 218smcphy_auto(struct mii_softc *sc, int media) 219{ 220 uint16_t anar; 221 222 anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA; 223 if ((media & IFM_FLOW) != 0 || (sc->mii_flags & MIIF_FORCEPAUSE) != 0) 224 anar |= ANAR_FC; 225 PHY_WRITE(sc, MII_ANAR, anar); 226 /* Apparently this helps. */ 227 anar = PHY_READ(sc, MII_ANAR); 228 PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 229} 230 231static void 232smcphy_status(struct mii_softc *sc) 233{ 234 struct mii_data *mii; 235 uint32_t bmcr, bmsr, status; 236 237 mii = sc->mii_pdata; 238 mii->mii_media_status = IFM_AVALID; 239 mii->mii_media_active = IFM_ETHER; 240 241 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 242 if ((bmsr & BMSR_LINK) != 0) 243 mii->mii_media_status |= IFM_ACTIVE; 244 245 bmcr = PHY_READ(sc, MII_BMCR); 246 if ((bmcr & BMCR_ISO) != 0) { 247 mii->mii_media_active |= IFM_NONE; 248 mii->mii_media_status = 0; 249 return; 250 } 251 252 if ((bmcr & BMCR_LOOP) != 0) 253 mii->mii_media_active |= IFM_LOOP; 254 255 if ((bmcr & BMCR_AUTOEN) != 0) { 256 if ((bmsr & BMSR_ACOMP) == 0) { 257 /* Erg, still trying, I guess... */ 258 mii->mii_media_active |= IFM_NONE; 259 return; 260 } 261 } 262 263 status = PHY_READ(sc, 0x12); 264 if (status & 0x0080) 265 mii->mii_media_active |= IFM_100_TX; 266 else 267 mii->mii_media_active |= IFM_10_T; 268 if (status & 0x0040) 269 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc); 270 else 271 mii->mii_media_active |= IFM_HDX; 272} 273