DM9000_RCR
dme_write(sc, DM9000_RCR,
rcr = dme_read(sc, DM9000_RCR);
dme_write(sc, DM9000_RCR, rcr &~ DM9000_RCR_RXEN);
dme_write(sc, DM9000_RCR, rcr | DM9000_RCR_RXEN);
dme_write(sc, DM9000_RCR, 0x0);