From b057e498fdaff82092710b0d7c553d3375b2e314 Mon Sep 17 00:00:00 2001 From: Md Sadre Alam Date: Wed, 24 Feb 2021 01:08:58 +0530 Subject: [PATCH] mtd: rawnand: qcom: Add helper to check last code word Add the qcom_nandc_is_last_cw() helper which checks if the input cw index is the last one or not. Signed-off-by: Md Sadre Alam Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/1614109141-7531-2-git-send-email-mdalam@codeaurora.org --- drivers/mtd/nand/raw/qcom_nandc.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c index 41d4ad8..d5cf68f 100644 --- a/drivers/mtd/nand/raw/qcom_nandc.c +++ b/drivers/mtd/nand/raw/qcom_nandc.c @@ -662,6 +662,12 @@ static void nandc_set_reg(struct nand_chip *chip, int offset, *reg = cpu_to_le32(val); } +/* Helper to check the code word, whether it is last cw or not */ +static bool qcom_nandc_is_last_cw(struct nand_ecc_ctrl *ecc, int cw) +{ + return cw == (ecc->steps - 1); +} + /* helper to configure address register values */ static void set_address(struct qcom_nand_host *host, u16 column, int page) { @@ -1629,7 +1635,7 @@ qcom_nandc_read_cw_raw(struct mtd_info *mtd, struct nand_chip *chip, data_size1 = mtd->writesize - host->cw_size * (ecc->steps - 1); oob_size1 = host->bbm_size; - if (cw == (ecc->steps - 1)) { + if (qcom_nandc_is_last_cw(ecc, cw)) { data_size2 = ecc->size - data_size1 - ((ecc->steps - 1) * 4); oob_size2 = (ecc->steps * 4) + host->ecc_bytes_hw + @@ -1710,7 +1716,7 @@ check_for_erased_page(struct qcom_nand_host *host, u8 *data_buf, } for_each_set_bit(cw, &uncorrectable_cws, ecc->steps) { - if (cw == (ecc->steps - 1)) { + if (qcom_nandc_is_last_cw(ecc, cw)) { data_size = ecc->size - ((ecc->steps - 1) * 4); oob_size = (ecc->steps * 4) + host->ecc_bytes_hw; } else { @@ -1770,7 +1776,7 @@ static int parse_read_errors(struct qcom_nand_host *host, u8 *data_buf, u32 flash, buffer, erased_cw; int data_len, oob_len; - if (i == (ecc->steps - 1)) { + if (qcom_nandc_is_last_cw(ecc, i)) { data_len = ecc->size - ((ecc->steps - 1) << 2); oob_len = ecc->steps << 2; } else { @@ -1869,7 +1875,7 @@ static int read_page_ecc(struct qcom_nand_host *host, u8 *data_buf, for (i = 0; i < ecc->steps; i++) { int data_size, oob_size; - if (i == (ecc->steps - 1)) { + if (qcom_nandc_is_last_cw(ecc, i)) { data_size = ecc->size - ((ecc->steps - 1) << 2); oob_size = (ecc->steps << 2) + host->ecc_bytes_hw + host->spare_bytes; @@ -2048,7 +2054,7 @@ static int qcom_nandc_write_page(struct nand_chip *chip, const uint8_t *buf, for (i = 0; i < ecc->steps; i++) { int data_size, oob_size; - if (i == (ecc->steps - 1)) { + if (qcom_nandc_is_last_cw(ecc, i)) { data_size = ecc->size - ((ecc->steps - 1) << 2); oob_size = (ecc->steps << 2) + host->ecc_bytes_hw + host->spare_bytes; @@ -2068,7 +2074,7 @@ static int qcom_nandc_write_page(struct nand_chip *chip, const uint8_t *buf, * itself. For the last codeword, we skip the bbm positions and * write to the free oob area. */ - if (i == (ecc->steps - 1)) { + if (qcom_nandc_is_last_cw(ecc, i)) { oob_buf += host->bbm_size; write_data_dma(nandc, FLASH_BUF_ACC + data_size, @@ -2123,7 +2129,7 @@ static int qcom_nandc_write_page_raw(struct nand_chip *chip, data_size1 = mtd->writesize - host->cw_size * (ecc->steps - 1); oob_size1 = host->bbm_size; - if (i == (ecc->steps - 1)) { + if (qcom_nandc_is_last_cw(ecc, i)) { data_size2 = ecc->size - data_size1 - ((ecc->steps - 1) << 2); oob_size2 = (ecc->steps << 2) + host->ecc_bytes_hw + -- 2.7.4