diff options
Diffstat (limited to 'drivers/mtd/nand/atmel_nand.c')
| -rw-r--r-- | drivers/mtd/nand/atmel_nand.c | 28 |
1 files changed, 17 insertions, 11 deletions
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c index 92623ac2015a..90bdca61c797 100644 --- a/drivers/mtd/nand/atmel_nand.c +++ b/drivers/mtd/nand/atmel_nand.c @@ -331,13 +331,13 @@ static void atmel_write_buf(struct mtd_info *mtd, const u8 *buf, int len) * 12-bits 20-bytes 21-bytes * 24-bits 39-bytes 42-bytes */ -static int __devinit pmecc_get_ecc_bytes(int cap, int sector_size) +static int pmecc_get_ecc_bytes(int cap, int sector_size) { int m = 12 + sector_size / 512; return (m * cap + 7) / 8; } -static void __devinit pmecc_config_ecc_layout(struct nand_ecclayout *layout, +static void pmecc_config_ecc_layout(struct nand_ecclayout *layout, int oobsize, int ecc_len) { int i; @@ -353,7 +353,7 @@ static void __devinit pmecc_config_ecc_layout(struct nand_ecclayout *layout, oobsize - ecc_len - layout->oobfree[0].offset; } -static void __devinit __iomem *pmecc_get_alpha_to(struct atmel_nand_host *host) +static void __iomem *pmecc_get_alpha_to(struct atmel_nand_host *host) { int table_size; @@ -375,7 +375,7 @@ static void pmecc_data_free(struct atmel_nand_host *host) kfree(host->pmecc_delta); } -static int __devinit pmecc_data_alloc(struct atmel_nand_host *host) +static int pmecc_data_alloc(struct atmel_nand_host *host) { const int cap = host->pmecc_corr_cap; @@ -724,6 +724,7 @@ static int pmecc_correction(struct mtd_info *mtd, u32 pmecc_stat, uint8_t *buf, struct atmel_nand_host *host = nand_chip->priv; int i, err_nbr, eccbytes; uint8_t *buf_pos; + int total_err = 0; eccbytes = nand_chip->ecc.bytes; for (i = 0; i < eccbytes; i++) @@ -751,12 +752,13 @@ normal_check: pmecc_correct_data(mtd, buf_pos, ecc, i, host->pmecc_bytes_per_sector, err_nbr); mtd->ecc_stats.corrected += err_nbr; + total_err += err_nbr; } } pmecc_stat >>= 1; } - return 0; + return total_err; } static int atmel_nand_pmecc_read_page(struct mtd_info *mtd, @@ -768,6 +770,7 @@ static int atmel_nand_pmecc_read_page(struct mtd_info *mtd, uint32_t *eccpos = chip->ecc.layout->eccpos; uint32_t stat; unsigned long end_time; + int bitflips = 0; pmecc_writel(host->ecc, CTRL, PMECC_CTRL_RST); pmecc_writel(host->ecc, CTRL, PMECC_CTRL_DISABLE); @@ -790,11 +793,14 @@ static int atmel_nand_pmecc_read_page(struct mtd_info *mtd, } stat = pmecc_readl_relaxed(host->ecc, ISR); - if (stat != 0) - if (pmecc_correction(mtd, stat, buf, &oob[eccpos[0]]) != 0) - return -EIO; + if (stat != 0) { + bitflips = pmecc_correction(mtd, stat, buf, &oob[eccpos[0]]); + if (bitflips < 0) + /* uncorrectable errors */ + return 0; + } - return 0; + return bitflips; } static int atmel_nand_pmecc_write_page(struct mtd_info *mtd, @@ -1206,7 +1212,7 @@ static void atmel_nand_hwctl(struct mtd_info *mtd, int mode) } #if defined(CONFIG_OF) -static int __devinit atmel_of_init_port(struct atmel_nand_host *host, +static int atmel_of_init_port(struct atmel_nand_host *host, struct device_node *np) { u32 val, table_offset; @@ -1293,7 +1299,7 @@ static int __devinit atmel_of_init_port(struct atmel_nand_host *host, return 0; } #else -static int __devinit atmel_of_init_port(struct atmel_nand_host *host, +static int atmel_of_init_port(struct atmel_nand_host *host, struct device_node *np) { return -EINVAL; |