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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>
This commit is contained in:
Sandeep Paulraj 2009-11-19 23:04:42 -05:00 committed by Scott Wood
parent 5e1ded558b
commit 10a5a79912
1 changed files with 16 additions and 7 deletions
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23
drivers/mtd/nand/davinci_nand.c
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@ -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 #ifdef CONFIG_SYS_NAND_4BIT_HW_ECC_OOBFIRST
static struct nand_ecclayout nand_davinci_4bit_layout_oobfirst = { static struct nand_ecclayout nand_davinci_4bit_layout_oobfirst = {
/* #if defined(CONFIG_SYS_NAND_PAGE_2K)
* 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
.eccbytes = 40, .eccbytes = 40,
.eccpos = { .eccpos = {
24, 25, 26, 27, 28, 24, 25, 26, 27, 28,
@ -200,6 +194,21 @@ static struct nand_ecclayout nand_davinci_4bit_layout_oobfirst = {
.oobfree = { .oobfree = {
{.offset = 2, .length = 22, }, {.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 #endif
}; };