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nand: Merge BCH code from Linux nand driver

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[backport from linux commit 02f8c6aee8df3cdc935e9bdd4f2d020306035dbe]

This patch merges the BCH ECC algorithm from the 3.0 Linux kernel.
This enables U-Boot to support modern NAND flash chips that
require more than 1-bit of ECC in software.

Signed-off-by: Christian Hitz <christian.hitz@aizo.com>
Cc: Scott Wood <scottwood@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Christian Hitz 2011-10-12 09:31:59 +02:00 • committed by Scott Wood
parent 4d2aee2b36
commit 4c6de8560c
8 changed files with 1788 additions and 8 deletions
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10
include/linux/mtd/nand.h
View file

@ -18,13 +18,6 @@
#ifndef __LINUX_MTD_NAND_H
#define __LINUX_MTD_NAND_H
/* XXX U-BOOT XXX */
#if 0
#include <linux/wait.h>
#include <linux/spinlock.h>
#include <linux/mtd/mtd.h>
#endif
#include "config.h"
#include "linux/mtd/compat.h"
@ -132,6 +125,7 @@ typedef enum {
NAND_ECC_HW,
NAND_ECC_HW_SYNDROME,
NAND_ECC_HW_OOB_FIRST,
NAND_ECC_SOFT_BCH,
} nand_ecc_modes_t;
/*
@ -308,6 +302,7 @@ 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
@ -328,6 +323,7 @@ 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,