| 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 | |