RGE_DTCCR_CMD
RGE_WRITE_4(sc, RGE_DTCCR_LO, RGE_ADDR_LO(ss->paddr) | RGE_DTCCR_CMD);
if ((reg & RGE_DTCCR_CMD) == 0)
if ((reg & RGE_DTCCR_CMD) != 0)