WB_SD_FIFO
bus_space_read_multi_1(wb->wb_iot, wb->wb_ioh, WB_SD_FIFO, data, len);
bus_space_write_multi_1(wb->wb_iot, wb->wb_ioh, WB_SD_FIFO, data, len);
wb_read(wb, WB_SD_FIFO);