1 /* $OpenBSD: rdcphy.c,v 1.3 2014/12/05 15:50:04 mpi Exp $ */ 2 /*- 3 * Copyright (c) 2010, Pyun YongHyeon <yongari@FreeBSD.org> 4 * 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 unmodified, this list of conditions, and the following 11 * disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /* 30 * Driver for the RDC Semiconductor R6040 10/100 PHY. 31 */ 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/device.h> 37 #include <sys/socket.h> 38 39 #include <net/if.h> 40 #include <net/if_var.h> 41 #include <net/if_media.h> 42 43 #include <dev/mii/mii.h> 44 #include <dev/mii/miivar.h> 45 #include <dev/mii/miidevs.h> 46 47 #define MII_RDCPHY_DEBUG 0x11 48 #define DEBUG_JABBER_DIS 0x0040 49 #define DEBUG_LOOP_BACK_10MBPS 0x0400 50 51 #define MII_RDCPHY_CTRL 0x14 52 #define CTRL_SQE_ENB 0x0100 53 #define CTRL_NEG_POLARITY 0x0400 54 #define CTRL_AUTO_POLARITY 0x0800 55 #define CTRL_MDIXSEL_RX 0x2000 56 #define CTRL_MDIXSEL_TX 0x4000 57 #define CTRL_AUTO_MDIX_DIS 0x8000 58 59 #define MII_RDCPHY_CTRL2 0x15 60 #define CTRL2_LED_DUPLEX 0x0000 61 #define CTRL2_LED_DUPLEX_COL 0x0008 62 #define CTRL2_LED_ACT 0x0010 63 #define CTRL2_LED_SPEED_ACT 0x0018 64 #define CTRL2_LED_BLK_100MBPS_DIS 0x0020 65 #define CTRL2_LED_BLK_10MBPS_DIS 0x0040 66 #define CTRL2_LED_BLK_LINK_ACT_DIS 0x0080 67 #define CTRL2_SDT_THRESH_MASK 0x3E00 68 #define CTRL2_TIMING_ERR_SEL 0x4000 69 #define CTRL2_LED_BLK_80MS 0x8000 70 #define CTRL2_LED_BLK_160MS 0x0000 71 #define CTRL2_LED_MASK 0x0018 72 73 #define MII_RDCPHY_STATUS 0x16 74 #define STATUS_AUTO_MDIX_RX 0x0200 75 #define STATUS_AUTO_MDIX_TX 0x0400 76 #define STATUS_NEG_POLARITY 0x0800 77 #define STATUS_FULL_DUPLEX 0x1000 78 #define STATUS_SPEED_10 0x0000 79 #define STATUS_SPEED_100 0x2000 80 #define STATUS_SPEED_MASK 0x6000 81 #define STATUS_LINK_UP 0x8000 82 83 /* Analog test register 2 */ 84 #define MII_RDCPHY_TEST2 0x1A 85 #define TEST2_PWR_DOWN 0x0200 86 87 struct rdcphy_softc { 88 struct mii_softc sc_mii; 89 int mii_link_tick; 90 #define RDCPHY_MANNEG_TICK 3 91 }; 92 93 int rdcphy_service(struct mii_softc *, struct mii_data *, int); 94 void rdcphy_attach(struct device *, struct device *, void *); 95 int rdcphy_match(struct device *, void *, void *); 96 void rdcphy_status(struct mii_softc *); 97 98 const struct mii_phy_funcs rdcphy_funcs = { 99 rdcphy_service, rdcphy_status, mii_phy_reset, 100 }; 101 102 static const struct mii_phydesc rdcphys[] = { 103 { MII_OUI_RDC, MII_MODEL_RDC_R6040, 104 MII_STR_RDC_R6040 }, 105 { 0, 0, 106 NULL }, 107 }; 108 109 struct cfattach rdcphy_ca = { 110 sizeof(struct rdcphy_softc), rdcphy_match, rdcphy_attach, 111 mii_phy_detach 112 }; 113 114 struct cfdriver rdcphy_cd = { 115 NULL, "rdcphy", DV_DULL 116 }; 117 118 int 119 rdcphy_match(struct device *parent, void *match, void *aux) 120 { 121 struct mii_attach_args *ma = aux; 122 123 if (mii_phy_match(ma, rdcphys) != NULL) 124 return (10); 125 126 return (0); 127 } 128 129 void 130 rdcphy_attach(struct device *parent, struct device *self, void *aux) 131 { 132 struct rdcphy_softc *sc = (struct rdcphy_softc *)self; 133 struct mii_attach_args *ma = aux; 134 struct mii_data *mii = ma->mii_data; 135 const struct mii_phydesc *mpd; 136 137 mpd = mii_phy_match(ma, rdcphys); 138 printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 139 140 sc->sc_mii.mii_inst = mii->mii_instance; 141 sc->sc_mii.mii_phy = ma->mii_phyno; 142 sc->sc_mii.mii_funcs = &rdcphy_funcs; 143 sc->sc_mii.mii_pdata = mii; 144 sc->sc_mii.mii_flags = ma->mii_flags; 145 146 PHY_RESET(&sc->sc_mii); 147 148 sc->sc_mii.mii_capabilities = 149 PHY_READ(&sc->sc_mii, MII_BMSR) & ma->mii_capmask; 150 if (sc->sc_mii.mii_capabilities & BMSR_EXTSTAT) 151 sc->sc_mii.mii_extcapabilities = 152 PHY_READ(&sc->sc_mii, MII_EXTSR); 153 154 if (sc->sc_mii.mii_capabilities & BMSR_MEDIAMASK) 155 mii_phy_add_media(&sc->sc_mii); 156 } 157 158 int 159 rdcphy_service(struct mii_softc *self, struct mii_data *mii, int cmd) 160 { 161 struct rdcphy_softc *sc = (struct rdcphy_softc *)self; 162 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 163 int reg; 164 165 if ((sc->sc_mii.mii_dev.dv_flags & DVF_ACTIVE) == 0) 166 return (ENXIO); 167 168 switch (cmd) { 169 case MII_POLLSTAT: 170 /* 171 * If we're not polling our PHY instance, just return. 172 */ 173 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) 174 return (0); 175 break; 176 177 case MII_MEDIACHG: 178 /* 179 * If the media indicates a different PHY instance, 180 * isolate ourselves. 181 */ 182 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) { 183 reg = PHY_READ(&sc->sc_mii, MII_BMCR); 184 PHY_WRITE(&sc->sc_mii, MII_BMCR, reg | BMCR_ISO); 185 return (0); 186 } 187 188 /* 189 * If the interface is not up, don't do anything. 190 */ 191 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 192 break; 193 194 mii_phy_setmedia(&sc->sc_mii); 195 switch (IFM_SUBTYPE(ife->ifm_media)) { 196 case IFM_100_TX: 197 case IFM_10_T: 198 /* 199 * Report fake lost link event to parent 200 * driver. This will stop MAC of parent 201 * driver and make it possible to reconfigure 202 * MAC after completion of link establishment. 203 * Note, the parent MAC seems to require 204 * restarting MAC when underlying any PHY 205 * configuration was changed even if the 206 * resolved speed/duplex was not changed at 207 * all. 208 */ 209 mii->mii_media_status = 0; 210 mii->mii_media_active = IFM_ETHER | IFM_NONE; 211 sc->mii_link_tick = RDCPHY_MANNEG_TICK; 212 /* Immediately report link down. */ 213 mii_phy_update(&sc->sc_mii, MII_MEDIACHG); 214 return (0); 215 default: 216 break; 217 } 218 break; 219 220 case MII_TICK: 221 /* 222 * If we're not currently selected, just return. 223 */ 224 if (IFM_INST(ife->ifm_media) != sc->sc_mii.mii_inst) 225 return (0); 226 227 if (mii_phy_tick(&sc->sc_mii) == EJUSTRETURN) 228 return (0); 229 230 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) { 231 /* 232 * It seems the PHY hardware does not correctly 233 * report link status changes when manual link 234 * configuration is in progress. It is also 235 * possible for the PHY to complete establishing 236 * a link within one second such that mii(4) 237 * did not notice the link change. To workaround 238 * the issue, emulate lost link event and wait 239 * for 3 seconds when manual link configuration 240 * is in progress. 3 seconds would be long 241 * enough to absorb transient link flips. 242 */ 243 if (sc->mii_link_tick > 0) { 244 sc->mii_link_tick--; 245 return (0); 246 } 247 } 248 break; 249 } 250 251 /* Update the media status. */ 252 mii_phy_status(&sc->sc_mii); 253 254 /* Callback if something changed. */ 255 mii_phy_update(&sc->sc_mii, cmd); 256 return (0); 257 } 258 259 void 260 rdcphy_status(struct mii_softc *sc) 261 { 262 struct mii_data *mii = sc->mii_pdata; 263 struct ifmedia_entry *ife; 264 int bmsr, bmcr, physts; 265 266 ife = mii->mii_media.ifm_cur; 267 268 mii->mii_media_status = IFM_AVALID; 269 mii->mii_media_active = IFM_ETHER; 270 271 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 272 physts = PHY_READ(sc, MII_RDCPHY_STATUS); 273 274 if (physts & STATUS_LINK_UP) 275 mii->mii_media_status |= IFM_ACTIVE; 276 277 bmcr = PHY_READ(sc, MII_BMCR); 278 if (bmcr & BMCR_ISO) { 279 mii->mii_media_active |= IFM_NONE; 280 mii->mii_media_status = 0; 281 return; 282 } 283 284 if (bmcr & BMCR_LOOP) 285 mii->mii_media_active |= IFM_LOOP; 286 287 if (bmcr & BMCR_AUTOEN) { 288 if (!(bmsr & BMSR_ACOMP)) { 289 /* Erg, still trying, I guess... */ 290 mii->mii_media_active |= IFM_NONE; 291 return; 292 } 293 } 294 295 switch (physts & STATUS_SPEED_MASK) { 296 case STATUS_SPEED_100: 297 mii->mii_media_active |= IFM_100_TX; 298 break; 299 case STATUS_SPEED_10: 300 mii->mii_media_active |= IFM_10_T; 301 break; 302 default: 303 mii->mii_media_active |= IFM_NONE; 304 return; 305 } 306 if ((physts & STATUS_FULL_DUPLEX) != 0) 307 mii->mii_media_active |= IFM_FDX | 308 mii_phy_flowstatus(sc); 309 else 310 mii->mii_media_active |= IFM_HDX; 311 } 312