RT2661_H2M_MAILBOX_CSR
if (RT2661_READ(sc, RT2661_H2M_MAILBOX_CSR) & RT2661_H2M_BUSY)
RT2661_WRITE(sc, RT2661_H2M_MAILBOX_CSR,
RT2661_WRITE(sc, RT2661_H2M_MAILBOX_CSR, 0);