NRDYSTS
r8a66597_write(r8a66597, 0, NRDYSTS);
mask = r8a66597_read(r8a66597, NRDYSTS)
r8a66597_write(r8a66597, ~mask, NRDYSTS);
r8a66597_write(r8a66597, 0, NRDYSTS);
state->nrdysts = usbhs_read(priv, NRDYSTS);
usbhs_write(priv, NRDYSTS, ~irq_state.nrdysts);