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authorBo Shen <voice.shen@atmel.com>2014-06-12 15:58:45 +0800
committerBrian Norris <computersforpeace@gmail.com>2014-07-21 19:39:55 -0700
commitb38576667cdcf7a646843b07666faae11cc63e9c (patch)
treeb07fec491086eaacb1cbb874328482e592396ce2 /drivers/mtd
parent974647ea8a13021a91d558df61d598bcabf73439 (diff)
downloadlinux-b38576667cdcf7a646843b07666faae11cc63e9c.tar.gz
mtd: atmel_nand: make ecc parameters same as definition
If the ecc parameter is not the same as definition, when the mtd core check these parameters, it will give the error result. Take the following as an example: Calculate how many bits can be corrected in one page. According to the ecc parameters definition, one page correct bits = (mtd->writesize * ecc->strength) / ecc->size take the following use case as an example: mtd->writesize = 2048 bytes ecc->strength = 4 bytes (for 512 bytes) before this patch, the ecc->size = 2048, so the result is 4 bytes. after this patch, the ecc->size = 512, so the result is 16 bytes. So, align the ecc parameters the same as definition to correct this kind of error. Signed-off-by: Bo Shen <voice.shen@atmel.com> Acked-by: Josh Wu <josh.wu@atmel.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/nand/atmel_nand.c20
1 files changed, 10 insertions, 10 deletions
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index 4ce181a35bcd..4f5348fd409c 100644
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -861,12 +861,11 @@ static int pmecc_correction(struct mtd_info *mtd, u32 pmecc_stat, uint8_t *buf,
{
struct nand_chip *nand_chip = mtd->priv;
struct atmel_nand_host *host = nand_chip->priv;
- int i, err_nbr, eccbytes;
+ int i, err_nbr;
uint8_t *buf_pos;
int total_err = 0;
- eccbytes = nand_chip->ecc.bytes;
- for (i = 0; i < eccbytes; i++)
+ for (i = 0; i < nand_chip->ecc.total; i++)
if (ecc[i] != 0xff)
goto normal_check;
/* Erased page, return OK */
@@ -928,7 +927,7 @@ static int atmel_nand_pmecc_read_page(struct mtd_info *mtd,
struct nand_chip *chip, uint8_t *buf, int oob_required, int page)
{
struct atmel_nand_host *host = chip->priv;
- int eccsize = chip->ecc.size;
+ int eccsize = chip->ecc.size * chip->ecc.steps;
uint8_t *oob = chip->oob_poi;
uint32_t *eccpos = chip->ecc.layout->eccpos;
uint32_t stat;
@@ -1169,8 +1168,7 @@ static int atmel_pmecc_nand_init_params(struct platform_device *pdev,
goto err;
}
- /* ECC is calculated for the whole page (1 step) */
- nand_chip->ecc.size = mtd->writesize;
+ nand_chip->ecc.size = sector_size;
/* set ECC page size and oob layout */
switch (mtd->writesize) {
@@ -1185,18 +1183,20 @@ static int atmel_pmecc_nand_init_params(struct platform_device *pdev,
host->pmecc_index_of = host->pmecc_rom_base +
host->pmecc_lookup_table_offset;
- nand_chip->ecc.steps = 1;
+ nand_chip->ecc.steps = host->pmecc_sector_number;
nand_chip->ecc.strength = cap;
- nand_chip->ecc.bytes = host->pmecc_bytes_per_sector *
+ nand_chip->ecc.bytes = host->pmecc_bytes_per_sector;
+ nand_chip->ecc.total = host->pmecc_bytes_per_sector *
host->pmecc_sector_number;
- if (nand_chip->ecc.bytes > mtd->oobsize - 2) {
+ if (nand_chip->ecc.total > mtd->oobsize - 2) {
dev_err(host->dev, "No room for ECC bytes\n");
err_no = -EINVAL;
goto err;
}
pmecc_config_ecc_layout(&atmel_pmecc_oobinfo,
mtd->oobsize,
- nand_chip->ecc.bytes);
+ nand_chip->ecc.total);
+
nand_chip->ecc.layout = &atmel_pmecc_oobinfo;
break;
case 512: