RT2661_H2M_MAILBOX_CSR
if (RAL_READ(sc, RT2661_H2M_MAILBOX_CSR) & RT2661_H2M_BUSY)
RAL_WRITE(sc, RT2661_H2M_MAILBOX_CSR,
RAL_WRITE(sc, RT2661_H2M_MAILBOX_CSR, 0);