apci3120_addon_write
apci3120_addon_write(dev, AGCSTS_TC_ENABLE | AGCSTS_RESET_A2P_FIFO,
apci3120_addon_write(dev, dmabuf->hw, AMCC_OP_REG_AMWAR);
apci3120_addon_write(dev, dmabuf->use_size, AMCC_OP_REG_AMWTC);
apci3120_addon_write(dev, 0, AMCC_OP_REG_AGCSTS);