IF_SPI_SCRATCH_1_REG
err = spu_write_u16(card, IF_SPI_SCRATCH_1_REG,
err = spu_write_u16(card, IF_SPI_SCRATCH_1_REG, FIRMWARE_DNLD_OK);
err = spu_read_u16(card, IF_SPI_SCRATCH_1_REG, &len);
err = spu_wait_for_u16(card, IF_SPI_SCRATCH_1_REG, 0, 0);
err = spu_read_u16(card, IF_SPI_SCRATCH_1_REG, &len);