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