micphy.c revision 1.4.10.2
1 /* $NetBSD: micphy.c,v 1.4.10.2 2019/09/04 08:33:39 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center, and by Frank van der Linden. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 48 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 49 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 51 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 52 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 53 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 54 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 55 */ 56 57 /* 58 * Driver for Micrel KSZ9021RN PHYs 59 */ 60 61 #include <sys/cdefs.h> 62 __KERNEL_RCSID(0, "$NetBSD: micphy.c,v 1.4.10.2 2019/09/04 08:33:39 martin Exp $"); 63 64 #include "opt_mii.h" 65 66 #include <sys/param.h> 67 #include <sys/systm.h> 68 #include <sys/kernel.h> 69 #include <sys/device.h> 70 #include <sys/socket.h> 71 #include <sys/errno.h> 72 73 #include <net/if.h> 74 #include <net/if_media.h> 75 76 #include <dev/mii/mii.h> 77 #include <dev/mii/miivar.h> 78 #include <dev/mii/miidevs.h> 79 80 static int micphymatch(device_t, cfdata_t, void *); 81 static void micphyattach(device_t, device_t, void *); 82 static void micphy_reset(struct mii_softc *); 83 static int micphy_service(struct mii_softc *, struct mii_data *, int); 84 85 CFATTACH_DECL3_NEW(micphy, sizeof(struct mii_softc), 86 micphymatch, micphyattach, mii_phy_detach, mii_phy_activate, NULL, NULL, 87 DVF_DETACH_SHUTDOWN); 88 89 static int micphy_service(struct mii_softc *, struct mii_data *, int); 90 static void micphy_fixup(struct mii_softc *, int, int, device_t); 91 92 static const struct mii_phy_funcs micphy_funcs = { 93 micphy_service, ukphy_status, micphy_reset, 94 }; 95 96 static const struct mii_phydesc micphys[] = { 97 { MII_OUI_MICREL, MII_MODEL_MICREL_KSZ8081, 98 MII_STR_MICREL_KSZ8081 }, 99 100 { MII_OUI_MICREL, MII_MODEL_MICREL_KSZ9021RNI, 101 MII_STR_MICREL_KSZ9021RNI }, 102 103 { 0, 0, 104 NULL }, 105 }; 106 107 #define MII_KSZ8081_PHYCTL2 0x1f 108 109 static int 110 micphymatch(device_t parent, cfdata_t match, void *aux) 111 { 112 struct mii_attach_args *ma = aux; 113 114 if (mii_phy_match(ma, micphys) != NULL) 115 return 10; 116 117 return 1; 118 } 119 120 static void 121 micphyattach(device_t parent, device_t self, void *aux) 122 { 123 struct mii_softc *sc = device_private(self); 124 struct mii_attach_args *ma = aux; 125 struct mii_data *mii = ma->mii_data; 126 int model = MII_MODEL(ma->mii_id2); 127 int rev = MII_REV(ma->mii_id2); 128 const struct mii_phydesc *mpd; 129 130 mpd = mii_phy_match(ma, micphys); 131 aprint_naive(": Media interface\n"); 132 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, rev); 133 134 sc->mii_dev = self; 135 sc->mii_inst = mii->mii_instance; 136 sc->mii_phy = ma->mii_phyno; 137 sc->mii_funcs = &micphy_funcs; 138 sc->mii_pdata = mii; 139 sc->mii_flags = ma->mii_flags; 140 sc->mii_anegticks = MII_ANEGTICKS; 141 142 PHY_RESET(sc); 143 144 micphy_fixup(sc, model, rev, parent); 145 146 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 147 if (sc->mii_capabilities & BMSR_EXTSTAT) 148 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR); 149 aprint_normal_dev(self, ""); 150 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0 && 151 (sc->mii_extcapabilities & EXTSR_MEDIAMASK) == 0) 152 aprint_error("no media present"); 153 else 154 mii_phy_add_media(sc); 155 aprint_normal("\n"); 156 } 157 158 static void 159 micphy_reset(struct mii_softc *sc) 160 { 161 int reg = 0; /* XXX gcc */ 162 163 /* 164 * The 8081 has no "sticky bits" that survive a soft reset; several bits 165 * in the Phy Control Register 2 must be preserved across the reset. 166 * These bits are set up by the bootloader; they control how the phy 167 * interfaces to the board (such as clock frequency and LED behavior). 168 */ 169 if (sc->mii_mpd_model == MII_MODEL_MICREL_KSZ8081) 170 reg = PHY_READ(sc, MII_KSZ8081_PHYCTL2); 171 mii_phy_reset(sc); 172 if (sc->mii_mpd_model == MII_MODEL_MICREL_KSZ8081) 173 PHY_WRITE(sc, MII_KSZ8081_PHYCTL2, reg); 174 } 175 176 static int 177 micphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 178 { 179 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 180 int reg; 181 182 switch (cmd) { 183 case MII_POLLSTAT: 184 /* 185 * If we're not polling our PHY instance, just return. 186 */ 187 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 188 return 0; 189 break; 190 191 case MII_MEDIACHG: 192 /* 193 * If the media indicates a different PHY instance, 194 * isolate ourselves. 195 */ 196 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 197 reg = PHY_READ(sc, MII_BMCR); 198 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 199 return 0; 200 } 201 202 /* 203 * If the interface is not up, don't do anything. 204 */ 205 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 206 break; 207 208 mii_phy_setmedia(sc); 209 break; 210 211 case MII_TICK: 212 /* 213 * If we're not currently selected, just return. 214 */ 215 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 216 return 0; 217 218 if (mii_phy_tick(sc) == EJUSTRETURN) 219 return 0; 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 return 0; 233 } 234 235 #define XREG_CONTROL 0x0b 236 #define XREG_WRITE 0x0c 237 #define XREG_READ 0x0d 238 #define XREG_CTL_SEL_READ 0x0000 239 #define XREG_CTL_SEL_WRITE 0x8000 240 241 #define REG_RGMII_CLOCK_AND_CONTROL 0x104 242 #define REG_RGMII_RX_DATA 0x105 243 244 static void micphy_writexreg(struct mii_softc *sc, uint32_t reg, uint32_t wval) 245 { 246 int rval __debugused; 247 248 PHY_WRITE(sc, XREG_CONTROL, XREG_CTL_SEL_WRITE | reg); 249 PHY_WRITE(sc, XREG_WRITE, wval); 250 PHY_WRITE(sc, XREG_CONTROL, XREG_CTL_SEL_READ | reg); 251 rval = PHY_READ(sc, XREG_READ); 252 KDASSERT(wval == rval); 253 } 254 255 static void 256 micphy_fixup(struct mii_softc *sc, int model, int rev, device_t parent) 257 { 258 switch (model) { 259 case MII_MODEL_MICREL_KSZ9021RNI: 260 if (!device_is_a(parent, "cpsw")) 261 break; 262 263 aprint_normal_dev(sc->mii_dev, "adjusting RGMII signal timing for cpsw\n"); 264 265 // RGMII RX Data Pad Skew 266 micphy_writexreg(sc, REG_RGMII_RX_DATA, 0x0000); 267 268 // RGMII Clock and Control Pad Skew 269 micphy_writexreg(sc, REG_RGMII_CLOCK_AND_CONTROL, 0x9090); 270 271 break; 272 } 273 274 return; 275 } 276
Indexes created Wed Oct 15 16:09:53 GMT 2025