DTCH
r8a66597_write(r8a66597, ~DTCH, get_intsts_reg(port));
if (mask2 & DTCH) {
r8a66597_write(r8a66597, ~DTCH, INTSTS2);
if (mask1 & DTCH) {
r8a66597_write(r8a66597, ~DTCH, INTSTS1);
if (irq_state.intsts1 & DTCH)