NAND: Add Support for 4K page size in DaVinci NAND driver

This patch adds support for NAND devices with a page size of
4K in the DaVinci NAND driver. The layout matches the layout that TI uses
for 4K page size NAND devices in the kernel NAND driver.

Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c
index eabaf3e773f63d8e14d46694e1a57fd394437428..41a95685f6d1acc4f44fd84ad05a121dfdd5f737 100644 (file)
--- a/drivers/mtd/nand/davinci_nand.c
+++ b/drivers/mtd/nand/davinci_nand.c
@@ -182,13 +182,7 @@ static int nand_davinci_correct_data(struct mtd_info *mtd, u_char *dat, u_char *
 
 #ifdef CONFIG_SYS_NAND_4BIT_HW_ECC_OOBFIRST
 static struct nand_ecclayout nand_davinci_4bit_layout_oobfirst = {
-/*
- * TI uses a different layout for 4K page deviecs. Since the
- * eccpos filed can hold only a limited number of entries, adding
- * support for 4K page will result in compilation warnings
- * 4K Support will be added later
- */
-#ifdef CONFIG_SYS_NAND_PAGE_2K
+#if defined(CONFIG_SYS_NAND_PAGE_2K)
        .eccbytes = 40,
        .eccpos = {
                24, 25, 26, 27, 28,
@@ -200,6 +194,21 @@ static struct nand_ecclayout nand_davinci_4bit_layout_oobfirst = {
        .oobfree = {
                {.offset = 2, .length = 22, },
        },
+#elif defined(CONFIG_SYS_NAND_PAGE_4K)
+       .eccbytes = 80,
+       .eccpos = {
+               48, 49, 50, 51, 52, 53, 54, 55, 56, 57,
+               58, 59, 60, 61, 62, 63, 64, 65, 66, 67,
+               68, 69, 70, 71, 72, 73, 74, 75, 76, 77,
+               78, 79, 80, 81, 82, 83, 84, 85, 86, 87,
+               88, 89, 90, 91, 92, 93, 94, 95, 96, 97,
+               98, 99, 100, 101, 102, 103, 104, 105, 106, 107,
+               108, 109, 110, 111, 112, 113, 114, 115, 116, 117,
+               118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
+               },
+       .oobfree = {
+               {.offset = 2, .length = 46, },
+       },
 #endif
 };