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>

diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index 77bd877d8f28b757995b3e71a78f95fb4e184052..e4d57ffef07edbf3f18a8a677d98c705d6dbfbca 100644 (file)
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -1174,7 +1174,17 @@ static int atmel_pmecc_nand_init_params(struct platform_device *pdev,
 
        /* set ECC page size and oob layout */
        switch (mtd->writesize) {
+       case 512:
+       case 1024:
        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) ?
                        PMECC_GF_DIMENSION_13 : PMECC_GF_DIMENSION_14;
                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;
                break;
-       case 512:
-       case 1024:
-       case 4096:
-               /* TODO */
+       default:
                dev_warn(host->dev,
                        "Unsupported page size for PMECC, use Software ECC\n");
-       default:
                /* page size not handled by HW ECC */
                /* switching back to soft ECC */
                nand_chip->ecc.mode = NAND_ECC_SOFT;