MXC: Add large page oob layout for i.MX31 NAND controller.

Import the large page oob layout from Linux mxc_nand.c driver.

The CONFIG_SYS_NAND_LARGEPAGE option is used to activate
the large page oob layout. Run time detection is not supported
as this moment.

This has been tested on the i.MX31 PDK board with a large
page NAND device.

Signed-off-by: Magnus Lilja <lilja.magnus@gmail.com>

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index fc111b5bb60c75f7b30a383eba32f52d7a8afa16..b2b612e3a4a470e493252e5abcc16a7bf983e054 100644 (file)
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -149,6 +149,13 @@ static struct nand_ecclayout nand_soft_eccoob = {
 };
 #endif
 
+static struct nand_ecclayout nand_hw_eccoob_largepage = {
+       .eccbytes = 20,
+       .eccpos = {6, 7, 8, 9, 10, 22, 23, 24, 25, 26,
+                  38, 39, 40, 41, 42, 54, 55, 56, 57, 58},
+       .oobfree = {{2, 4}, {11, 10}, {27, 10}, {43, 10}, {59, 5}, }
+};
+
 #ifdef CONFIG_MX27
 static int is_16bit_nand(void)
 {
@@ -902,7 +909,12 @@ int board_nand_init(struct nand_chip *this)
        if (is_16bit_nand())
                this->options |= NAND_BUSWIDTH_16;
 
+#ifdef CONFIG_SYS_NAND_LARGEPAGE
+       host->pagesize_2k = 1;
+       this->ecc.layout = &nand_hw_eccoob_largepage;
+#else
        host->pagesize_2k = 0;
+#endif
 
        return err;
 }