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| author | Huang Shijie <b32955@freescale.com> | 2013-01-25 14:04:07 +0800 |
|---|---|---|
| committer | Artem Bityutskiy <artem.bityutskiy@linux.intel.com> | 2013-02-04 10:27:59 +0200 |
| commit | 9ff16f0833806b6b59aaf0cc158fa6e42f24d7e4 (patch) | |
| tree | 179db9e57e721cb0c779b97bbfc9d7a6db8c27dc /drivers/mtd/nand/gpmi-nand/gpmi-nand.c | |
| parent | c80e572c029263687b8175f1ba71d425548cafcf (diff) | |
| download | talos-obmc-linux-9ff16f0833806b6b59aaf0cc158fa6e42f24d7e4.tar.gz talos-obmc-linux-9ff16f0833806b6b59aaf0cc158fa6e42f24d7e4.zip | |
mtd: gpmi: set the Golois Field bit for mx6q's BCH
The GF13 can be only used in the following case:
The ECC data chunk is less then 1K bytes.
In mx23/mx28, the ecc data chunk is 512 bytes. So it is okay.
But in mx6q, we begin to use some large nand chip whose ecc
data chunk maybe 1K bytes long. So when the data chunk is 1K bytes,
we have to use the GF14.
This patch sets the Golois Field bit when the GF14 is needed.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Diffstat (limited to 'drivers/mtd/nand/gpmi-nand/gpmi-nand.c')
| -rw-r--r-- | drivers/mtd/nand/gpmi-nand/gpmi-nand.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c index 38c8b8bfc428..25216785f180 100644 --- a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c +++ b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c @@ -112,10 +112,12 @@ int common_nfc_set_geometry(struct gpmi_nand_data *this) /* The default for the length of Galois Field. */ geo->gf_len = 13; - /* The default for chunk size. There is no oobsize greater then 512. */ + /* The default for chunk size. */ geo->ecc_chunk_size = 512; - while (geo->ecc_chunk_size < mtd->oobsize) + while (geo->ecc_chunk_size < mtd->oobsize) { geo->ecc_chunk_size *= 2; /* keep C >= O */ + geo->gf_len = 14; + } geo->ecc_chunk_count = mtd->writesize / geo->ecc_chunk_size; |
