24  *	1024 bytes data + 4Bytes sys data + 28Bytes~124Bytes ECC data +
25  *	1024 bytes data + 4Bytes sys data + 28Bytes~124Bytes ECC data +
32  *	4Bytes sys data + .... + 4Bytes sys data + ECC data.
94  * struct rk_ecc_cnt_status: represent a ecc status data.
96  * @low: ECC count low bit index at register.
98  * @low_bn: ECC count low bit number.
99  * @high: ECC count high bit index at register.
113  * @ecc_strengths: ECC strengths
114  * @ecc_cfgs: ECC config values
198 	return (u8 *)p + i * chip->ecc.size;  in rk_nfc_buf_to_data_ptr()
215 	poi = chip->oob_poi + rknand->metadata_size + chip->ecc.bytes * i;  in rk_nfc_buf_to_oob_ecc_ptr()
222 	return chip->ecc.size + chip->ecc.bytes + NFC_SYS_DATA_SIZE;  in rk_nfc_data_len()
236 	return nfc->page_buf + i * rk_nfc_data_len(chip) + chip->ecc.size;  in rk_nfc_oob_ptr()
256 	/* Save chip ECC setting */  in rk_nfc_hw_ecc_setup()
266 	struct nand_ecc_ctrl *ecc = &chip->ecc;  in rk_nfc_select_chip()  local
297 	 * Compare current chip ECC setting with selected chip ECC setting and  in rk_nfc_select_chip()
300 	if (nfc->cur_ecc != ecc->strength)  in rk_nfc_select_chip()
301 		rk_nfc_hw_ecc_setup(chip, ecc->strength);  in rk_nfc_select_chip()
513 	struct nand_ecc_ctrl *ecc = &chip->ecc;  in rk_nfc_write_page_raw()  local
519 	    rknand->boot_ecc != ecc->strength) {  in rk_nfc_write_page_raw()
522 		 * a different ECC strength is in use for the boot blocks.  in rk_nfc_write_page_raw()
530 	for (i = 0; i < ecc->steps; i++) {  in rk_nfc_write_page_raw()
535 			       ecc->size);  in rk_nfc_write_page_raw()
571 			       rk_nfc_buf_to_oob_ptr(chip, ecc->steps - 1),  in rk_nfc_write_page_raw()
577 		/* Copy ECC data to the NFC buffer. */  in rk_nfc_write_page_raw()
580 		       ecc->bytes);  in rk_nfc_write_page_raw()
594 	struct nand_ecc_ctrl *ecc = &chip->ecc;  in rk_nfc_write_page_hwecc()  local
595 	int oob_step = (ecc->bytes > 60) ? NFC_MAX_OOB_PER_STEP :  in rk_nfc_write_page_hwecc()
627 	 * Configure the ECC algorithm supported by the boot ROM.  in rk_nfc_write_page_hwecc()
632 		if (rknand->boot_ecc != ecc->strength)  in rk_nfc_write_page_hwecc()
636 	for (i = 0; i < ecc->steps; i++) {  in rk_nfc_write_page_hwecc()
657 				 ecc->steps * oob_step,  in rk_nfc_write_page_hwecc()
663 	rk_nfc_xfer_start(nfc, NFC_WRITE, ecc->steps, dma_data,  in rk_nfc_write_page_hwecc()
678 	dma_unmap_single(nfc->dev, dma_oob, ecc->steps * oob_step,  in rk_nfc_write_page_hwecc()
681 	if (boot_rom_mode && rknand->boot_ecc != ecc->strength)  in rk_nfc_write_page_hwecc()
682 		rk_nfc_hw_ecc_setup(chip, ecc->strength);  in rk_nfc_write_page_hwecc()
703 	struct nand_ecc_ctrl *ecc = &chip->ecc;  in rk_nfc_read_page_raw()  local
709 	    rknand->boot_ecc != ecc->strength) {  in rk_nfc_read_page_raw()
712 		 * a different ECC strength is in use for the boot blocks.  in rk_nfc_read_page_raw()
719 	for (i = 0; i < ecc->steps; i++) {  in rk_nfc_read_page_raw()
728 			memcpy(rk_nfc_buf_to_oob_ptr(chip, ecc->steps - 1),  in rk_nfc_read_page_raw()
736 		/* Copy ECC data from the NFC buffer. */  in rk_nfc_read_page_raw()
739 		       ecc->bytes);  in rk_nfc_read_page_raw()
745 			       ecc->size);  in rk_nfc_read_page_raw()
757 	struct nand_ecc_ctrl *ecc = &chip->ecc;  in rk_nfc_read_page_hwecc()  local
758 	int oob_step = (ecc->bytes > 60) ? NFC_MAX_OOB_PER_STEP :  in rk_nfc_read_page_hwecc()
773 				 ecc->steps * oob_step,  in rk_nfc_read_page_hwecc()
779 	 * Configure the ECC algorithm supported by the boot ROM.  in rk_nfc_read_page_hwecc()
784 		if (rknand->boot_ecc != ecc->strength)  in rk_nfc_read_page_hwecc()
790 	rk_nfc_xfer_start(nfc, NFC_READ, ecc->steps, dma_data,  in rk_nfc_read_page_hwecc()
805 	dma_unmap_single(nfc->dev, dma_oob, ecc->steps * oob_step,  in rk_nfc_read_page_hwecc()
814 	for (i = 1; i < ecc->steps; i++) {  in rk_nfc_read_page_hwecc()
826 	for (i = 0; i < (ecc->steps / 2); i++) {  in rk_nfc_read_page_hwecc()
848 	if (boot_rom_mode && rknand->boot_ecc != ecc->strength)  in rk_nfc_read_page_hwecc()
849 		rk_nfc_hw_ecc_setup(chip, ecc->strength);  in rk_nfc_read_page_hwecc()
855 		dev_err(nfc->dev, "read page: %x ecc error!\n", page);  in rk_nfc_read_page_hwecc()
965 	.ecc = rk_nfc_ooblayout_ecc,
972 	struct nand_ecc_ctrl *ecc = &chip->ecc;  in rk_nfc_ecc_init()  local
979 	if (!ecc->size || !ecc->strength ||  in rk_nfc_ecc_init()
980 	    ecc->strength > nfc_max_strength) {  in rk_nfc_ecc_init()
981 		chip->ecc.size = 1024;  in rk_nfc_ecc_init()
982 		ecc->steps = mtd->writesize / ecc->size;  in rk_nfc_ecc_init()
985 		 * HW ECC always requests the number of ECC bytes per 1024 byte  in rk_nfc_ecc_init()
988 		max_strength = ((mtd->oobsize / ecc->steps) - 4) * 8 /  in rk_nfc_ecc_init()
999 			dev_err(nfc->dev, "unsupported ECC strength\n");  in rk_nfc_ecc_init()
1003 		ecc->strength = strengths[i];  in rk_nfc_ecc_init()
1005 	ecc->steps = mtd->writesize / ecc->size;  in rk_nfc_ecc_init()
1006 	ecc->bytes = DIV_ROUND_UP(ecc->strength * fls(8 * chip->ecc.size), 8);  in rk_nfc_ecc_init()
1017 	struct nand_ecc_ctrl *ecc = &chip->ecc;  in rk_nfc_attach_chip()  local
1027 	if (ecc->engine_type != NAND_ECC_ENGINE_TYPE_ON_HOST)  in rk_nfc_attach_chip()
1034 	rknand->metadata_size = NFC_SYS_DATA_SIZE * ecc->steps;  in rk_nfc_attach_chip()
1054 	new_oob_len = ecc->steps * NFC_MAX_OOB_PER_STEP;  in rk_nfc_attach_chip()
1084 	chip->ecc.write_page_raw = rk_nfc_write_page_raw;  in rk_nfc_attach_chip()
1085 	chip->ecc.write_page = rk_nfc_write_page_hwecc;  in rk_nfc_attach_chip()
1086 	chip->ecc.write_oob = rk_nfc_write_oob;  in rk_nfc_attach_chip()
1088 	chip->ecc.read_page_raw = rk_nfc_read_page_raw;  in rk_nfc_attach_chip()
1089 	chip->ecc.read_page = rk_nfc_read_page_hwecc;  in rk_nfc_attach_chip()
1090 	chip->ecc.read_oob = rk_nfc_read_oob;  in rk_nfc_attach_chip()
1157 	chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;  in rk_nfc_nand_chip_init()
1178 		ret = of_property_read_u32(np, "rockchip,boot-ecc-strength",  in rk_nfc_nand_chip_init()
1180 		rknand->boot_ecc = ret ? chip->ecc.strength : tmp;  in rk_nfc_nand_chip_init()