WTCSR_MAGIC
writew(WTCSR_MAGIC | 0, priv->base + WTCSR);
writew(WTCSR_MAGIC | WTSCR_WT | WTSCR_TME, priv->base + WTCSR);
writew(WTCSR_MAGIC | 0, priv->base + WTCSR);
writew(WTCSR_MAGIC | WTSCR_WT | WTSCR_TME |
writew(WTCSR_MAGIC | 0, priv->base + WTCSR);