1 /* $NetBSD: urlphy.c,v 1.31 2016/07/07 06:55:41 msaitoh Exp $ */ 2 /* 3 * Copyright (c) 2001, 2002 4 * Shingo WATANABE <nabe@nabechan.org>. 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 * 3. Neither the name of the author nor the names of any co-contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 */ 31 32 /* 33 * driver for Realtek RL8150L internal phy 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: urlphy.c,v 1.31 2016/07/07 06:55:41 msaitoh Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/device.h> 43 #include <sys/socket.h> 44 45 #include <net/if.h> 46 #include <net/if_media.h> 47 48 #include <dev/mii/mii.h> 49 #include <dev/mii/miivar.h> 50 #include <dev/mii/miidevs.h> 51 #include <dev/mii/urlphyreg.h> 52 53 #ifdef URLPHY_DEBUG 54 #define DPRINTF(x) if (urlphydebug) printf x 55 #define DPRINTFN(n,x) if (urlphydebug>(n)) printf x 56 int urlphydebug = URLPHY_DEBUG; 57 #else 58 #define DPRINTF(x) 59 #define DPRINTFN(n,x) 60 #endif 61 62 static int urlphy_match(device_t, cfdata_t, void *); 63 static void urlphy_attach(device_t, device_t, void *); 64 65 CFATTACH_DECL_NEW(urlphy, sizeof(struct mii_softc), 66 urlphy_match, urlphy_attach, mii_phy_detach, mii_phy_activate); 67 68 static int urlphy_service(struct mii_softc *, struct mii_data *, int); 69 static void urlphy_status(struct mii_softc *); 70 71 static const struct mii_phy_funcs urlphy_funcs = { 72 urlphy_service, urlphy_status, mii_phy_reset, 73 }; 74 75 static int 76 urlphy_match(device_t parent, cfdata_t match, void *aux) 77 { 78 struct mii_attach_args *ma = aux; 79 80 /* 81 * RTL8150 reports OUI == 0, MODEL == 0 82 */ 83 if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 && 84 MII_MODEL(ma->mii_id2) != 0) 85 return (0); 86 87 /* 88 * Make sure the parent is an 'url' device. 89 */ 90 if (!device_is_a(parent, "url")) 91 return(0); 92 93 return (10); 94 } 95 96 static void 97 urlphy_attach(device_t parent, device_t self, void *aux) 98 { 99 struct mii_softc *sc = device_private(self); 100 struct mii_attach_args *ma = aux; 101 struct mii_data *mii = ma->mii_data; 102 103 aprint_naive(": Media interface\n"); 104 aprint_normal(": Realtek RTL8150L internal media interface\n"); 105 106 DPRINTF(("%s: %s: enter\n", device_xname(self), __func__)); 107 108 sc->mii_dev = self; 109 sc->mii_inst = mii->mii_instance; 110 sc->mii_phy = ma->mii_phyno; 111 sc->mii_funcs = &urlphy_funcs; 112 sc->mii_pdata = mii; 113 sc->mii_flags = mii->mii_flags; 114 sc->mii_anegticks = MII_ANEGTICKS_GIGE; 115 116 /* Don't do loopback on this PHY. */ 117 sc->mii_flags |= MIIF_NOLOOP; 118 /* Don't do isolate on this PHY. */ 119 sc->mii_flags |= MIIF_NOISOLATE; 120 121 if (mii->mii_instance != 0) { 122 aprint_error_dev(self, 123 "ignoring this PHY, non-zero instance\n"); 124 return; 125 } 126 PHY_RESET(sc); 127 128 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 129 aprint_normal_dev(self, ""); 130 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 131 aprint_error("no media present"); 132 else 133 mii_phy_add_media(sc); 134 aprint_normal("\n"); 135 } 136 137 static int 138 urlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 139 { 140 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 141 int reg; 142 143 DPRINTF(("%s: %s: enter\n", device_xname(sc->mii_dev), __func__)); 144 145 switch (cmd) { 146 case MII_POLLSTAT: 147 /* 148 * If we're not polling our PHY instance, just return. 149 */ 150 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 151 return (0); 152 break; 153 154 case MII_MEDIACHG: 155 /* 156 * If we're not currently selected, just return. 157 */ 158 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 159 return (0); 160 161 /* If the interface is not up, don't do anything. */ 162 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 163 break; 164 165 mii_phy_setmedia(sc); 166 break; 167 168 case MII_TICK: 169 /* 170 * If we're not currently selected, just return. 171 */ 172 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 173 return (0); 174 175 /* Just bail now if the interface is down. */ 176 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 177 return (0); 178 179 /* 180 * If we're not doing autonegotiation, we don't need to do 181 * any extra work here. However, we need to check the link 182 * status so we can generate an announcement if the status 183 * changes. 184 */ 185 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 186 break; 187 188 /* Read the status register twice; MSR_LINK is latch-low. */ 189 reg = PHY_READ(sc, URLPHY_MSR) | PHY_READ(sc, URLPHY_MSR); 190 if (reg & URLPHY_MSR_LINK) { 191 /* 192 * Reset autonegotiation timer to 0 in case the link 193 * goes down in the next tick. 194 */ 195 sc->mii_ticks = 0; 196 /* See above. */ 197 break; 198 } 199 200 /* 201 * mii_ticks == 0 means it's the first tick after changing the 202 * media or the link became down since the last tick (see 203 * above), so break to update the status. 204 */ 205 if (sc->mii_ticks++ == 0) 206 break; 207 208 /* 209 * Only retry autonegotiation every N seconds. 210 */ 211 KASSERT(sc->mii_anegticks != 0); 212 if (sc->mii_ticks <= sc->mii_anegticks) 213 return (0); 214 215 PHY_RESET(sc); 216 217 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 218 return (0); 219 220 break; 221 222 case MII_DOWN: 223 mii_phy_down(sc); 224 return (0); 225 } 226 227 /* Update the media status. */ 228 mii_phy_status(sc); 229 230 /* Callback if something changed. */ 231 mii_phy_update(sc, cmd); 232 233 return (0); 234 } 235 236 static void 237 urlphy_status(struct mii_softc *sc) 238 { 239 struct mii_data *mii = sc->mii_pdata; 240 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 241 int msr, bmsr, bmcr; 242 243 DPRINTF(("%s: %s: enter\n", device_xname(sc->mii_dev), __func__)); 244 245 mii->mii_media_status = IFM_AVALID; 246 mii->mii_media_active = IFM_ETHER; 247 248 /* 249 * The link status bit is not exist in the BMSR register, 250 * so we need to read the MSR register to get link status. 251 */ 252 msr = PHY_READ(sc, URLPHY_MSR) | PHY_READ(sc, URLPHY_MSR); 253 if (msr & URLPHY_MSR_LINK) 254 mii->mii_media_status |= IFM_ACTIVE; 255 256 DPRINTF(("%s: %s: link %s\n", device_xname(sc->mii_dev), __func__, 257 mii->mii_media_status & IFM_ACTIVE ? "up" : "down")); 258 259 bmcr = PHY_READ(sc, MII_BMCR); 260 if (bmcr & BMCR_AUTOEN) { 261 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 262 if ((bmsr & BMSR_ACOMP) == 0) { 263 /* Erg, still trying, I guess... */ 264 mii->mii_media_active |= IFM_NONE; 265 return; 266 } 267 268 if (msr & URLPHY_MSR_SPEED_100) 269 mii->mii_media_active |= IFM_100_TX; 270 else 271 mii->mii_media_active |= IFM_10_T; 272 273 if (msr & URLPHY_MSR_DUPLEX) 274 mii->mii_media_active |= IFM_FDX; 275 else 276 mii->mii_media_active |= IFM_HDX; 277 } else 278 mii->mii_media_active = ife->ifm_media; 279 } 280