EBU_NAND_CON
ltq_ebu_w32_mask(0, NAND_CON_CE, EBU_NAND_CON);
| cs_flag, EBU_NAND_CON);
ltq_ebu_w32_mask(NAND_CON_CE, 0, EBU_NAND_CON);
ltq_ebu_w32_mask(NAND_CON_NANDM, 0, EBU_NAND_CON);
ltq_ebu_w32_mask(0, NAND_CON_NANDM, EBU_NAND_CON);