BCHG
if (mask2 & BCHG) {
r8a66597_write(r8a66597, ~BCHG, INTSTS2);
if (mask1 & BCHG) {
r8a66597_write(r8a66597, ~BCHG, INTSTS1);
r8a66597_write(r8a66597, ~BCHG, get_intsts_reg(port));