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mtd: atmel_nand: add pmecc support for 512, 1k, 4k, 8k page size 

PMECC can support 512, 1k, 2k, 4k, 8k page size.
The driver currently only support 2k page size nand flash. So this patch
add support to 512, 1k, 4k and 8k page size nand flash.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Wu, Josh 2014-07-22 17:24:18 +08:00 committed by Brian Norris
parent 796fe3648a
commit a35571058e
1 changed files with 11 additions and 5 deletions
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16
drivers/mtd/nand/atmel_nand.c
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@ -1174,7 +1174,17 @@ static int atmel_pmecc_nand_init_params(struct platform_device *pdev,
/* set ECC page size and oob layout */ /* set ECC page size and oob layout */
switch (mtd->writesize) { switch (mtd->writesize) {
case 512:
case 1024:
case 2048: case 2048:
case 4096:
case 8192:
if (sector_size > mtd->writesize) {
dev_err(host->dev, "pmecc sector size is bigger than the page size!\n");
err_no = -EINVAL;
goto err;
}
host->pmecc_degree = (sector_size == 512) ? host->pmecc_degree = (sector_size == 512) ?
PMECC_GF_DIMENSION_13 : PMECC_GF_DIMENSION_14; PMECC_GF_DIMENSION_13 : PMECC_GF_DIMENSION_14;
host->pmecc_cw_len = (1 << host->pmecc_degree) - 1; host->pmecc_cw_len = (1 << host->pmecc_degree) - 1;
@ -1201,13 +1211,9 @@ static int atmel_pmecc_nand_init_params(struct platform_device *pdev,
nand_chip->ecc.layout = &atmel_pmecc_oobinfo; nand_chip->ecc.layout = &atmel_pmecc_oobinfo;
break; break;
case 512: default:
case 1024:
case 4096:
/* TODO */
dev_warn(host->dev, dev_warn(host->dev,
"Unsupported page size for PMECC, use Software ECC\n"); "Unsupported page size for PMECC, use Software ECC\n");
default:
/* page size not handled by HW ECC */ /* page size not handled by HW ECC */
/* switching back to soft ECC */ /* switching back to soft ECC */
nand_chip->ecc.mode = NAND_ECC_SOFT; nand_chip->ecc.mode = NAND_ECC_SOFT;