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-rw-r--r--drivers/mtd/nand/atmel_nand.c9
-rw-r--r--drivers/mtd/nand/atmel_nand_ecc.h20
2 files changed, 29 insertions, 0 deletions
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index 620b6e8..b16e3aa 100644
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -44,6 +44,7 @@ struct atmel_nand_host {
u8 pmecc_corr_cap;
u16 pmecc_sector_size;
u32 pmecc_index_table_offset;
+ u32 pmecc_version;
int pmecc_bytes_per_sector;
int pmecc_sector_number;
@@ -486,6 +487,10 @@ static int pmecc_correction(struct mtd_info *mtd, u32 pmecc_stat, uint8_t *buf,
int i, err_nbr, eccbytes;
uint8_t *buf_pos;
+ /* SAMA5D4 PMECC IP can correct errors for all 0xff page */
+ if (host->pmecc_version >= PMECC_VERSION_SAMA5D4)
+ goto normal_check;
+
eccbytes = nand_chip->ecc.bytes;
for (i = 0; i < eccbytes; i++)
if (ecc[i] != 0xff)
@@ -961,6 +966,10 @@ static int atmel_pmecc_nand_init_params(struct nand_chip *nand,
nand->ecc.write_page = atmel_nand_pmecc_write_page;
nand->ecc.strength = cap;
+ /* Check the PMECC ip version */
+ host->pmecc_version = pmecc_readl(host->pmerrloc, version);
+ dev_dbg(host->dev, "PMECC IP version is: %x\n", host->pmecc_version);
+
atmel_pmecc_core_init(mtd);
return 0;
diff --git a/drivers/mtd/nand/atmel_nand_ecc.h b/drivers/mtd/nand/atmel_nand_ecc.h
index eac860d..b2d2682 100644
--- a/drivers/mtd/nand/atmel_nand_ecc.h
+++ b/drivers/mtd/nand/atmel_nand_ecc.h
@@ -123,6 +123,20 @@ struct pmecc_errloc_regs {
u32 sigma[25]; /* 0x28-0x88 Error Location Sigma Registers */
u32 el[24]; /* 0x8C-0xE8 Error Location Registers */
u32 reserved1[5]; /* 0xEC-0xFC Reserved */
+
+ /*
+ * 0x100-0x1F8:
+ * Reserved for AT91SAM9X5, AT91SAM9N12.
+ * HSMC registers for SAMA5D3, SAMA5D4.
+ */
+ u32 reserved2[63];
+
+ /*
+ * 0x1FC:
+ * PMECC version for AT91SAM9X5, AT91SAM9N12.
+ * HSMC version for SAMA5D3, SAMA5D4. Can refer as PMECC version.
+ */
+ u32 version;
};
/* For Error Location Configuration Register */
@@ -137,6 +151,12 @@ struct pmecc_errloc_regs {
#define PMERRLOC_ERR_NUM_MASK (0x1f << 8)
#define PMERRLOC_CALC_DONE (1 << 0)
+/* PMECC IP version */
+#define PMECC_VERSION_SAMA5D4 0x113
+#define PMECC_VERSION_SAMA5D3 0x112
+#define PMECC_VERSION_AT91SAM9N12 0x102
+#define PMECC_VERSION_AT91SAM9X5 0x101
+
/* Galois field dimension */
#define PMECC_GF_DIMENSION_13 13
#define PMECC_GF_DIMENSION_14 14