NUM_STEPS_MASK
host->ecc_buf_cfg = FIELD_PREP(NUM_STEPS_MASK, 0x203);
host->ecc_buf_cfg = FIELD_PREP(NUM_STEPS_MASK, host->cw_data - 1);
ecc_cfg->ecc_buf_cfg = FIELD_PREP(NUM_STEPS_MASK, 0x203);