csio_hw_sf1_read
ret = csio_hw_sf1_read(hw, 1, 0, 1, &status);
ret = csio_hw_sf1_read(hw, 1, 1, 0, data);
ret = csio_hw_sf1_read(hw, 4, nwords > 1, nwords == 1, data);
ret = csio_hw_sf1_read(hw, 3, 0, 1, &flashid);