IF_SPI_HOST_INT_STATUS_MASK_REG
err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, 0);
err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG,
err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, 0);