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path: root/drivers/mtd/nand
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Diffstat (limited to 'drivers/mtd/nand')
-rw-r--r--drivers/mtd/nand/mxs_nand.c22
1 files changed, 14 insertions, 8 deletions
diff --git a/drivers/mtd/nand/mxs_nand.c b/drivers/mtd/nand/mxs_nand.c
index 4790013..5a7ef6b 100644
--- a/drivers/mtd/nand/mxs_nand.c
+++ b/drivers/mtd/nand/mxs_nand.c
@@ -41,6 +41,9 @@
#define MXS_NAND_BCH_TIMEOUT 10000
+int chunk_data_chunk_size = MXS_NAND_CHUNK_DATA_CHUNK_SIZE;
+int galois_field = 13;
+
struct mxs_nand_info {
int cur_chip;
@@ -130,12 +133,12 @@ static void mxs_nand_return_dma_descs(struct mxs_nand_info *info)
static uint32_t mxs_nand_ecc_chunk_cnt(uint32_t page_data_size)
{
- return page_data_size / MXS_NAND_CHUNK_DATA_CHUNK_SIZE;
+ return page_data_size / chunk_data_chunk_size;
}
static uint32_t mxs_nand_ecc_size_in_bits(uint32_t ecc_strength)
{
- return ecc_strength * 13;
+ return ecc_strength * galois_field;
}
static uint32_t mxs_nand_aux_status_offset(void)
@@ -166,7 +169,7 @@ static inline uint32_t mxs_nand_get_mark_offset(uint32_t page_data_size,
uint32_t block_mark_chunk_bit_offset;
uint32_t block_mark_bit_offset;
- chunk_data_size_in_bits = MXS_NAND_CHUNK_DATA_CHUNK_SIZE * 8;
+ chunk_data_size_in_bits = chunk_data_chunk_size * 8;
chunk_ecc_size_in_bits = mxs_nand_ecc_size_in_bits(ecc_strength);
chunk_total_size_in_bits =
@@ -966,9 +969,8 @@ static int mxs_nand_scan_bbt(struct mtd_info *mtd)
uint32_t tmp;
if (mtd->oobsize > MXS_NAND_CHUNK_DATA_CHUNK_SIZE) {
- printf("we do not support the NAND whose OOB size is"
- "larger then 512 bytes!\n");
- return -EINVAL;
+ chunk_data_chunk_size = MXS_NAND_CHUNK_DATA_CHUNK_SIZE * 2;
+ galois_field = 14;
}
/* Configure BCH and set NFC geometry */
@@ -980,16 +982,20 @@ static int mxs_nand_scan_bbt(struct mtd_info *mtd)
tmp |= MXS_NAND_METADATA_SIZE << BCH_FLASHLAYOUT0_META_SIZE_OFFSET;
tmp |= (mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize) >> 1)
<< BCH_FLASHLAYOUT0_ECC0_OFFSET;
- tmp |= MXS_NAND_CHUNK_DATA_CHUNK_SIZE
+ tmp |= chunk_data_chunk_size
>> MXS_NAND_CHUNK_DATA_CHUNK_SIZE_SHIFT;
+ tmp |= (14 == galois_field ? 1 : 0)
+ << BCH_FLASHLAYOUT0_GF13_0_GF14_1_OFFSET;
writel(tmp, &bch_regs->hw_bch_flash0layout0);
tmp = (mtd->writesize + mtd->oobsize)
<< BCH_FLASHLAYOUT1_PAGE_SIZE_OFFSET;
tmp |= (mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize) >> 1)
<< BCH_FLASHLAYOUT1_ECCN_OFFSET;
- tmp |= MXS_NAND_CHUNK_DATA_CHUNK_SIZE
+ tmp |= chunk_data_chunk_size
>> MXS_NAND_CHUNK_DATA_CHUNK_SIZE_SHIFT;
+ tmp |= (14 == galois_field ? 1 : 0)
+ << BCH_FLASHLAYOUT1_GF13_0_GF14_1_OFFSET;
writel(tmp, &bch_regs->hw_bch_flash0layout1);
/* Set *all* chip selects to use layout 0 */