DAC960_LP_CMDMBX_OFFSET
dma_addr_writeql(cmd_mbox_addr, base + DAC960_LP_CMDMBX_OFFSET);
*param0 = readb(base + DAC960_LP_CMDMBX_OFFSET + 0);
*param1 = readb(base + DAC960_LP_CMDMBX_OFFSET + 1);