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Subject[PATCH 2/5] mtd: rawnand: qcom: Add helper to check last code word
Date
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 <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 4898d32..9a890ef 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
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