From 77f5492c43adb4eb351fa0d163136877e8b2ed92 Mon Sep 17 00:00:00 2001 From: Richard Genoud Date: Wed, 23 Apr 2008 19:51:14 +0200 Subject: [MTD] [NAND] Hardware ECC controller on at91sam9263 / at91sam9260 This is a patch to use the hardware ECC controller of the AT91SAM9260 and AT91SAM9263 for the AT91 nand. On AT91 NAND, there's now a choice between ECC soft, ECC hard or no ECC (for debug). It has been tested on AT91SAM9263 with 8 bits large and small page NAND. Signed-off-by: Richard Genoud Signed-off-by: David Woodhouse --- drivers/mtd/nand/Kconfig | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) (limited to 'drivers/mtd/nand/Kconfig') diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig index dcbb0decd465..5076faf9ca66 100644 --- a/drivers/mtd/nand/Kconfig +++ b/drivers/mtd/nand/Kconfig @@ -278,6 +278,47 @@ config MTD_NAND_AT91 help Enables support for NAND Flash / Smart Media Card interface on Atmel AT91 processors. +choice + prompt "ECC management for NAND Flash / SmartMedia on AT91" + depends on MTD_NAND_AT91 + +config MTD_NAND_AT91_ECC_HW + bool "Hardware ECC" + depends on ARCH_AT91SAM9263 || ARCH_AT91SAM9260 + help + Uses hardware ECC provided by the at91sam9260/at91sam9263 chip + instead of software ECC. + The hardware ECC controller is capable of single bit error + correction and 2-bit random detection per page. + + NB : hardware and software ECC schemes are incompatible. + If you switch from one to another, you'll have to erase your + mtd partition. + + If unsure, say Y + +config MTD_NAND_AT91_ECC_SOFT + bool "Software ECC" + help + Uses software ECC. + + NB : hardware and software ECC schemes are incompatible. + If you switch from one to another, you'll have to erase your + mtd partition. + +config MTD_NAND_AT91_ECC_NONE + bool "No ECC (testing only, DANGEROUS)" + depends on DEBUG_KERNEL + help + No ECC will be used. + It's not a good idea and it should be reserved for testing + purpose only. + + If unsure, say N + + endchoice + +endchoice config MTD_NAND_PXA3xx bool "Support for NAND flash devices on PXA3xx" -- cgit v1.2.3