1 /* $NetBSD: rdcphy.c,v 1.8 2020/04/08 03:01:58 msaitoh Exp $ */ 2 3 /*- 4 * Copyright (c) 2010, Pyun YongHyeon <yongari@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice unmodified, this list of conditions, and the following 12 * disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 /* FreeBSD: src/sys/dev/mii/rdcphy.c,v 1.1 2010/12/30 23:50:25 yongari Exp */ 31 32 /* 33 * Driver for the RDC Semiconductor R6040 10/100 PHY. 34 */ 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: rdcphy.c,v 1.8 2020/04/08 03:01:58 msaitoh Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/device.h> 42 #include <sys/socket.h> 43 #include <sys/errno.h> 44 45 #include <sys/bus.h> 46 47 #include <net/if.h> 48 #include <net/if_media.h> 49 50 #include <dev/mii/mii.h> 51 #include <dev/mii/miivar.h> 52 #include <dev/mii/miidevs.h> 53 54 #include <dev/mii/rdcphyreg.h> 55 56 struct rdcphy_softc { 57 struct mii_softc sc_mii; 58 int sc_mii_link_tick; 59 #define RDCPHY_MANNEG_TICK 3 60 }; 61 62 static int rdcphymatch(device_t, cfdata_t, void *); 63 static void rdcphyattach(device_t, device_t, void *); 64 65 CFATTACH_DECL_NEW(rdcphy, sizeof(struct rdcphy_softc), 66 rdcphymatch, rdcphyattach, mii_phy_detach, mii_phy_activate); 67 68 69 static int rdcphy_service(struct mii_softc *, struct mii_data *, int); 70 static void rdcphy_status(struct mii_softc *); 71 72 static const struct mii_phy_funcs rdcphy_funcs = { 73 rdcphy_service, rdcphy_status, mii_phy_reset, 74 }; 75 76 static const struct mii_phydesc rdcphys[] = { 77 MII_PHY_DESC(xxRDC, R6040), 78 MII_PHY_DESC(xxRDC, R6040_2), 79 MII_PHY_DESC(xxRDC, R6040_3), 80 MII_PHY_END, 81 }; 82 83 static int 84 rdcphymatch(device_t parent, cfdata_t match, void *aux) 85 { 86 struct mii_attach_args *ma = aux; 87 88 if (mii_phy_match(ma, rdcphys) != NULL) 89 return 10; 90 91 return 0; 92 } 93 94 static void 95 rdcphyattach(device_t parent, device_t self, void *aux) 96 { 97 struct rdcphy_softc *rsc = device_private(self); 98 struct mii_softc *sc = &rsc->sc_mii; 99 struct mii_attach_args *ma = aux; 100 struct mii_data *mii = ma->mii_data; 101 102 const struct mii_phydesc *mpd; 103 104 mpd = mii_phy_match(ma, rdcphys); 105 aprint_naive(": Media interface\n"); 106 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 107 108 sc->mii_dev = self; 109 sc->mii_inst = mii->mii_instance; 110 sc->mii_phy = ma->mii_phyno; 111 sc->mii_funcs = &rdcphy_funcs; 112 sc->mii_pdata = mii; 113 sc->mii_flags = ma->mii_flags; 114 115 mii_lock(mii); 116 117 PHY_RESET(sc); 118 119 PHY_READ(sc, MII_BMSR, &sc->mii_capabilities); 120 sc->mii_capabilities &= ma->mii_capmask; 121 if (sc->mii_capabilities & BMSR_EXTSTAT) 122 PHY_READ(sc, MII_EXTSR, &sc->mii_extcapabilities); 123 124 mii_unlock(mii); 125 126 mii_phy_add_media(sc); 127 } 128 129 static int 130 rdcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 131 { 132 struct rdcphy_softc *rsc = (struct rdcphy_softc *)sc; 133 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 134 135 KASSERT(mii_locked(mii)); 136 137 switch (cmd) { 138 case MII_POLLSTAT: 139 break; 140 141 case MII_MEDIACHG: 142 /* If the interface is not up, don't do anything. */ 143 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 144 break; 145 146 mii_phy_setmedia(sc); 147 switch (IFM_SUBTYPE(ife->ifm_media)) { 148 case IFM_100_TX: 149 case IFM_10_T: 150 /* 151 * Report fake lost link event to parent driver. This 152 * will stop MAC of parent driver and make it possible 153 * to reconfigure MAC after completion of link 154 * establishment. 155 * Note, the parent MAC seems to require restarting MAC 156 * when underlying any PHY configuration was changed 157 * even if the resolved speed/duplex was not changed at 158 * all. 159 */ 160 mii->mii_media_status = 0; 161 mii->mii_media_active = IFM_ETHER | IFM_NONE; 162 rsc->sc_mii_link_tick = RDCPHY_MANNEG_TICK; 163 /* Immediately report link down. */ 164 mii_phy_update(sc, MII_MEDIACHG); 165 return 0; 166 default: 167 break; 168 } 169 break; 170 171 case MII_TICK: 172 if (mii_phy_tick(sc) == EJUSTRETURN) 173 return 0; 174 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) { 175 /* 176 * It seems the PHY hardware does not correctly report 177 * link status changes when manual link configuration 178 * is in progress. It is also possible for the PHY to 179 * complete establishing a link within one second such 180 * that mii(4) did not notice the link change. 181 * To workaround the issue, emulate lost link event and 182 * wait for 3 seconds when manual link configuration 183 * is in progress. 3 seconds would be long enough to 184 * absorb transient link flips. 185 */ 186 if (rsc->sc_mii_link_tick > 0) { 187 rsc->sc_mii_link_tick--; 188 return 0; 189 } 190 } 191 break; 192 } 193 194 /* Update the media status. */ 195 rdcphy_status(sc); 196 197 /* Callback if something changed. */ 198 mii_phy_update(sc, cmd); 199 return 0; 200 } 201 202 static void 203 rdcphy_status(struct mii_softc *sc) 204 { 205 struct mii_data *mii = sc->mii_pdata; 206 uint16_t bmsr, bmcr, physts; 207 208 KASSERT(mii_locked(mii)); 209 210 mii->mii_media_status = IFM_AVALID; 211 mii->mii_media_active = IFM_ETHER; 212 213 PHY_READ(sc, MII_BMSR, &bmsr); 214 PHY_READ(sc, MII_BMSR, &bmsr); 215 PHY_READ(sc, MII_RDCPHY_STATUS, &physts); 216 217 if ((physts & STATUS_LINK_UP) != 0) 218 mii->mii_media_status |= IFM_ACTIVE; 219 220 PHY_READ(sc, MII_BMCR, &bmcr); 221 if ((bmcr & BMCR_ISO) != 0) { 222 mii->mii_media_active |= IFM_NONE; 223 mii->mii_media_status = 0; 224 return; 225 } 226 227 if ((bmcr & BMCR_LOOP) != 0) 228 mii->mii_media_active |= IFM_LOOP; 229 230 if ((bmcr & BMCR_AUTOEN) != 0) { 231 if ((bmsr & BMSR_ACOMP) == 0) { 232 /* Erg, still trying, I guess... */ 233 mii->mii_media_active |= IFM_NONE; 234 return; 235 } 236 } 237 238 switch (physts & STATUS_SPEED_MASK) { 239 case STATUS_SPEED_100: 240 mii->mii_media_active |= IFM_100_TX; 241 break; 242 case STATUS_SPEED_10: 243 mii->mii_media_active |= IFM_10_T; 244 break; 245 default: 246 mii->mii_media_active |= IFM_NONE; 247 return; 248 } 249 if ((physts & STATUS_FULL_DUPLEX) != 0) 250 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc); 251 else 252 mii->mii_media_active |= IFM_HDX; 253 } 254