AT_TXD_BUFFER_SIZE
+ AT_TXD_BUFFER_SIZE;
LII_WRITE_2(sc, LII_TXD_BUFFER_SIZE, AT_TXD_BUFFER_SIZE / 4);
sc->sc_txd_cur = (sc->sc_txd_cur + 4) % AT_TXD_BUFFER_SIZE;
left = AT_TXD_BUFFER_SIZE - sc->sc_txd_cur;
sc->sc_txd_cur = ((sc->sc_txd_cur + 3) & ~3) % AT_TXD_BUFFER_SIZE;
space = (AT_TXD_BUFFER_SIZE - sc->sc_txd_cur) +
sc->sc_txd_ack %= AT_TXD_BUFFER_SIZE;