smcphy.c revision 215297
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: head/sys/dev/mii/smcphy.c 215297 2010-11-14 13:26:10Z marius $"); 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 int smcphy_reset(struct mii_softc *); 57static void smcphy_auto(struct mii_softc *, int); 58 59static device_method_t smcphy_methods[] = { 60 /* device interface */ 61 DEVMETHOD(device_probe, smcphy_probe), 62 DEVMETHOD(device_attach, smcphy_attach), 63 DEVMETHOD(device_detach, mii_phy_detach), 64 DEVMETHOD(device_shutdown, bus_generic_shutdown), 65 66 { 0, 0 } 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(SMSC, LAN83C183), 81 MII_PHY_END 82}; 83 84static int 85smcphy_probe(device_t dev) 86{ 87 88 return (mii_phy_dev_probe(dev, smcphys, BUS_PROBE_DEFAULT)); 89} 90 91static int 92smcphy_attach(device_t dev) 93{ 94 struct mii_softc *sc; 95 struct mii_attach_args *ma; 96 struct mii_data *mii; 97 98 sc = device_get_softc(dev); 99 ma = device_get_ivars(dev); 100 sc->mii_dev = device_get_parent(dev); 101 mii = ma->mii_data; 102 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 103 104 sc->mii_flags = miibus_get_flags(dev); 105 sc->mii_inst = mii->mii_instance++; 106 sc->mii_phy = ma->mii_phyno; 107 sc->mii_service = smcphy_service; 108 sc->mii_pdata = mii; 109 110 sc->mii_flags |= MIIF_NOISOLATE | MIIF_NOLOOP; 111 112 if (smcphy_reset(sc) != 0) { 113 device_printf(dev, "reset failed\n"); 114 } 115 116 /* Mask interrupts, we poll instead. */ 117 PHY_WRITE(sc, 0x1e, 0xffc0); 118 119 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 120 device_printf(dev, " "); 121 mii_phy_add_media(sc); 122 printf("\n"); 123 124 MIIBUS_MEDIAINIT(sc->mii_dev); 125 mii_phy_setmedia(sc); 126 127 return (0); 128} 129 130static int 131smcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 132{ 133 struct ifmedia_entry *ife; 134 int reg; 135 136 ife = mii->mii_media.ifm_cur; 137 138 switch (cmd) { 139 case MII_POLLSTAT: 140 break; 141 142 case MII_MEDIACHG: 143 /* 144 * If the interface is not up, don't do anything. 145 */ 146 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 147 break; 148 149 switch (IFM_SUBTYPE(ife->ifm_media)) { 150 case IFM_AUTO: 151 smcphy_auto(sc, ife->ifm_media); 152 break; 153 154 default: 155 mii_phy_setmedia(sc); 156 break; 157 } 158 159 break; 160 161 case MII_TICK: 162 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) { 163 return (0); 164 } 165 166 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) { 167 break; 168 } 169 170 /* I have no idea why BMCR_ISO gets set. */ 171 reg = PHY_READ(sc, MII_BMCR); 172 if (reg & BMCR_ISO) { 173 PHY_WRITE(sc, MII_BMCR, reg & ~BMCR_ISO); 174 } 175 176 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 177 if (reg & BMSR_LINK) { 178 sc->mii_ticks = 0; 179 break; 180 } 181 182 if (++sc->mii_ticks <= MII_ANEGTICKS) { 183 break; 184 } 185 186 sc->mii_ticks = 0; 187 if (smcphy_reset(sc) != 0) { 188 device_printf(sc->mii_dev, "reset failed\n"); 189 } 190 smcphy_auto(sc, ife->ifm_media); 191 break; 192 } 193 194 /* Update the media status. */ 195 ukphy_status(sc); 196 197 /* Callback if something changed. */ 198 mii_phy_update(sc, cmd); 199 return (0); 200} 201 202static int 203smcphy_reset(struct mii_softc *sc) 204{ 205 u_int bmcr; 206 int timeout; 207 208 PHY_WRITE(sc, MII_BMCR, BMCR_RESET); 209 210 for (timeout = 2; timeout > 0; timeout--) { 211 DELAY(50000); 212 bmcr = PHY_READ(sc, MII_BMCR); 213 if ((bmcr & BMCR_RESET) == 0) 214 break; 215 } 216 217 if (bmcr & BMCR_RESET) { 218 return (EIO); 219 } 220 221 PHY_WRITE(sc, MII_BMCR, 0x3000); 222 return (0); 223} 224 225static void 226smcphy_auto(struct mii_softc *sc, int media) 227{ 228 uint16_t anar; 229 230 anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | 231 ANAR_CSMA; 232 if ((media & IFM_FLOW) != 0 || (sc->mii_flags & MIIF_FORCEPAUSE) != 0) 233 anar |= ANAR_FC; 234 PHY_WRITE(sc, MII_ANAR, anar); 235 /* Apparently this helps. */ 236 anar = PHY_READ(sc, MII_ANAR); 237 PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 238} 239