diff options
Diffstat (limited to 'sys/dev/jme/if_jme.c')
| -rw-r--r-- | sys/dev/jme/if_jme.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/sys/dev/jme/if_jme.c b/sys/dev/jme/if_jme.c index 231f65a..59b1bb7 100644 --- a/sys/dev/jme/if_jme.c +++ b/sys/dev/jme/if_jme.c @@ -1940,7 +1940,7 @@ static void jme_mac_config(struct jme_softc *sc) { struct mii_data *mii; - uint32_t ghc, rxmac, txmac, txpause; + uint32_t ghc, gpreg, rxmac, txmac, txpause; JME_LOCK_ASSERT(sc); @@ -1996,9 +1996,19 @@ jme_mac_config(struct jme_softc *sc) default: break; } - /* Workaround CRC errors at 100Mbps on JMC250 A2. */ if (sc->jme_rev == DEVICEID_JMC250 && sc->jme_chip_rev == DEVICEREVID_JMC250_A2) { + /* + * Workaround occasional packet loss issue of JMC250 A2 + * when it runs on half-duplex media. + */ + gpreg = CSR_READ_4(sc, JME_GPREG1); + if ((IFM_OPTIONS(mii->mii_media_active) & IFM_FDX) != 0) + gpreg &= ~GPREG1_HDPX_FIX; + else + gpreg |= GPREG1_HDPX_FIX; + CSR_WRITE_4(sc, JME_GPREG1, gpreg); + /* Workaround CRC errors at 100Mbps on JMC250 A2. */ if (IFM_SUBTYPE(mii->mii_media_active) == IFM_100_TX) { /* Extend interface FIFO depth. */ jme_miibus_writereg(sc->jme_dev, sc->jme_phyaddr, |
