From 193bd40026443835e1b96c79d5efe559d01509ae Mon Sep 17 00:00:00 2001 From: Ivan Djelic Date: Fri, 11 Mar 2011 11:05:33 +0100 Subject: mtd: nand: add software BCH ECC support This patch adds software BCH ECC support to mtd, in order to handle recent NAND device ecc requirements (4 bits or more). It does so by adding a new ecc mode (NAND_ECC_SOFT_BCH) for use by board drivers, and a new Kconfig option to enable BCH support. It relies on the generic BCH library introduced in a previous patch. When a board driver uses mode NAND_ECC_SOFT_BCH, it should also set fields chip->ecc.size and chip->ecc.bytes to select BCH ecc data size and required error correction capability. See nand_bch_init() documentation for details. It has been tested on the following platforms using mtd-utils, UBI and UBIFS: x86 (with nandsim), arm926ejs. Signed-off-by: Ivan Djelic Signed-off-by: David Woodhouse --- include/linux/mtd/nand.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux/mtd/nand.h') diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 1f489b247a29..ae67ef56a8f5 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -140,6 +140,7 @@ typedef enum { NAND_ECC_HW, NAND_ECC_HW_SYNDROME, NAND_ECC_HW_OOB_FIRST, + NAND_ECC_SOFT_BCH, } nand_ecc_modes_t; /* @@ -339,6 +340,7 @@ struct nand_hw_control { * @prepad: padding information for syndrome based ecc generators * @postpad: padding information for syndrome based ecc generators * @layout: ECC layout control struct pointer + * @priv: pointer to private ecc control data * @hwctl: function to control hardware ecc generator. Must only * be provided if an hardware ECC is available * @calculate: function for ecc calculation or readback from ecc hardware @@ -362,6 +364,7 @@ struct nand_ecc_ctrl { int prepad; int postpad; struct nand_ecclayout *layout; + void *priv; void (*hwctl)(struct mtd_info *mtd, int mode); int (*calculate)(struct mtd_info *mtd, const uint8_t *dat, uint8_t *ecc_code); -- cgit v1.2.2 From 25985edcedea6396277003854657b5f3cb31a628 Mon Sep 17 00:00:00 2001 From: Lucas De Marchi Date: Wed, 30 Mar 2011 22:57:33 -0300 Subject: Fix common misspellings Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi --- include/linux/mtd/nand.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'include/linux/mtd/nand.h') diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index ae67ef56a8f5..d44192740f6f 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -416,9 +416,9 @@ struct nand_buffers { * @select_chip: [REPLACEABLE] select chip nr * @block_bad: [REPLACEABLE] check, if the block is bad * @block_markbad: [REPLACEABLE] mark the block bad - * @cmd_ctrl: [BOARDSPECIFIC] hardwarespecific funtion for controlling + * @cmd_ctrl: [BOARDSPECIFIC] hardwarespecific function for controlling * ALE/CLE/nCE. Also used to write command and address - * @init_size: [BOARDSPECIFIC] hardwarespecific funtion for setting + * @init_size: [BOARDSPECIFIC] hardwarespecific function for setting * mtd->oobsize, mtd->writesize and so on. * @id_data contains the 8 bytes values of NAND_CMD_READID. * Return with the bus width. @@ -437,7 +437,7 @@ struct nand_buffers { * @erase_cmd: [INTERN] erase command write function, selectable due * to AND support. * @scan_bbt: [REPLACEABLE] function to scan bad block table - * @chip_delay: [BOARDSPECIFIC] chip dependent delay for transfering + * @chip_delay: [BOARDSPECIFIC] chip dependent delay for transferring * data from array to read regs (tR). * @state: [INTERN] the current state of the NAND device * @oob_poi: poison value buffer -- cgit v1.2.2