1 /*- 2 * Copyright (c) 2010, Pyun YongHyeon <yongari@FreeBSD.org> 3 * 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 unmodified, this list of conditions, and the following 10 * 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 AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 /* 32 * Driver for the RDC Semiconductor R6040 10/100 PHY. 33 */ 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/module.h> 39 #include <sys/socket.h> 40 #include <sys/bus.h> 41 42 #include <net/if.h> 43 #include <net/if_media.h> 44 45 #include <dev/mii/mii.h> 46 #include <dev/mii/miivar.h> 47 #include "miidevs.h" 48 49 #include <dev/mii/rdcphyreg.h> 50 51 #include "miibus_if.h" 52 53 static device_probe_t rdcphy_probe; 54 static device_attach_t rdcphy_attach; 55 56 struct rdcphy_softc { 57 struct mii_softc mii_sc; 58 int mii_link_tick; 59 #define RDCPHY_MANNEG_TICK 3 60 }; 61 62 static device_method_t rdcphy_methods[] = { 63 /* device interface */ 64 DEVMETHOD(device_probe, rdcphy_probe), 65 DEVMETHOD(device_attach, rdcphy_attach), 66 DEVMETHOD(device_detach, mii_phy_detach), 67 DEVMETHOD(device_shutdown, bus_generic_shutdown), 68 DEVMETHOD_END 69 }; 70 71 static devclass_t rdcphy_devclass; 72 73 static driver_t rdcphy_driver = { 74 "rdcphy", 75 rdcphy_methods, 76 sizeof(struct rdcphy_softc) 77 }; 78 79 DRIVER_MODULE(rdcphy, miibus, rdcphy_driver, rdcphy_devclass, 0, 0); 80 81 static int rdcphy_service(struct mii_softc *, struct mii_data *, int); 82 static void rdcphy_status(struct mii_softc *); 83 84 static const struct mii_phydesc rdcphys[] = { 85 MII_PHY_DESC(RDC, R6040), 86 MII_PHY_END 87 }; 88 89 static const struct mii_phy_funcs rdcphy_funcs = { 90 rdcphy_service, 91 rdcphy_status, 92 mii_phy_reset 93 }; 94 95 static int 96 rdcphy_probe(device_t dev) 97 { 98 99 return (mii_phy_dev_probe(dev, rdcphys, BUS_PROBE_DEFAULT)); 100 } 101 102 static int 103 rdcphy_attach(device_t dev) 104 { 105 106 mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &rdcphy_funcs, 1); 107 return (0); 108 } 109 110 static int 111 rdcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 112 { 113 struct rdcphy_softc *rsc; 114 struct ifmedia_entry *ife; 115 116 rsc = (struct rdcphy_softc *)sc; 117 ife = mii->mii_media.ifm_cur; 118 119 switch (cmd) { 120 case MII_POLLSTAT: 121 break; 122 123 case MII_MEDIACHG: 124 /* 125 * If the interface is not up, don't do anything. 126 */ 127 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 128 break; 129 130 mii_phy_setmedia(sc); 131 switch (IFM_SUBTYPE(ife->ifm_media)) { 132 case IFM_100_TX: 133 case IFM_10_T: 134 /* 135 * Report fake lost link event to parent 136 * driver. This will stop MAC of parent 137 * driver and make it possible to reconfigure 138 * MAC after completion of link establishment. 139 * Note, the parent MAC seems to require 140 * restarting MAC when underlying any PHY 141 * configuration was changed even if the 142 * resolved speed/duplex was not changed at 143 * all. 144 */ 145 mii->mii_media_status = 0; 146 mii->mii_media_active = IFM_ETHER | IFM_NONE; 147 rsc->mii_link_tick = RDCPHY_MANNEG_TICK; 148 /* Immediately report link down. */ 149 mii_phy_update(sc, MII_MEDIACHG); 150 return (0); 151 default: 152 break; 153 } 154 break; 155 156 case MII_TICK: 157 if (mii_phy_tick(sc) == EJUSTRETURN) 158 return (0); 159 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) { 160 /* 161 * It seems the PHY hardware does not correctly 162 * report link status changes when manual link 163 * configuration is in progress. It is also 164 * possible for the PHY to complete establishing 165 * a link within one second such that mii(4) 166 * did not notice the link change. To workaround 167 * the issue, emulate lost link event and wait 168 * for 3 seconds when manual link configuration 169 * is in progress. 3 seconds would be long 170 * enough to absorb transient link flips. 171 */ 172 if (rsc->mii_link_tick > 0) { 173 rsc->mii_link_tick--; 174 return (0); 175 } 176 } 177 break; 178 } 179 180 /* Update the media status. */ 181 PHY_STATUS(sc); 182 183 /* Callback if something changed. */ 184 mii_phy_update(sc, cmd); 185 return (0); 186 } 187 188 static void 189 rdcphy_status(struct mii_softc *sc) 190 { 191 struct mii_data *mii; 192 struct ifmedia_entry *ife; 193 int bmsr, bmcr, physts; 194 195 mii = sc->mii_pdata; 196 ife = mii->mii_media.ifm_cur; 197 198 mii->mii_media_status = IFM_AVALID; 199 mii->mii_media_active = IFM_ETHER; 200 201 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 202 physts = PHY_READ(sc, MII_RDCPHY_STATUS); 203 204 if ((physts & STATUS_LINK_UP) != 0) 205 mii->mii_media_status |= IFM_ACTIVE; 206 207 bmcr = PHY_READ(sc, MII_BMCR); 208 if ((bmcr & BMCR_ISO) != 0) { 209 mii->mii_media_active |= IFM_NONE; 210 mii->mii_media_status = 0; 211 return; 212 } 213 214 if ((bmcr & BMCR_LOOP) != 0) 215 mii->mii_media_active |= IFM_LOOP; 216 217 if ((bmcr & BMCR_AUTOEN) != 0) { 218 if ((bmsr & BMSR_ACOMP) == 0) { 219 /* Erg, still trying, I guess... */ 220 mii->mii_media_active |= IFM_NONE; 221 return; 222 } 223 } 224 225 switch (physts & STATUS_SPEED_MASK) { 226 case STATUS_SPEED_100: 227 mii->mii_media_active |= IFM_100_TX; 228 break; 229 case STATUS_SPEED_10: 230 mii->mii_media_active |= IFM_10_T; 231 break; 232 default: 233 mii->mii_media_active |= IFM_NONE; 234 return; 235 } 236 if ((physts & STATUS_FULL_DUPLEX) != 0) 237 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc); 238 else 239 mii->mii_media_active |= IFM_HDX; 240 } 241