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[MTD] NAND Add optional ECC status check callback

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Add optional hardware specific callback routine to perform extra error
status checks on erase and write failures for devices with hardware ECC.

Signed-off-by: David A. Marlin <dmarlin@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
David A. Marlin 2005-01-24 03:07:46 +00:00 • committed by Thomas Gleixner
parent 99f2a8aea1
commit 068e3c0a00
2 changed files with 68 additions and 13 deletions
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16
include/linux/mtd/nand.h
View file

@ -5,7 +5,7 @@
* Steven J. Hill <sjhill@realitydiluted.com>
* Thomas Gleixner <tglx@linutronix.de>
*
* $Id: nand.h,v 1.69 2005/01/17 18:29:18 dmarlin Exp $
* $Id: nand.h,v 1.70 2005/01/24 03:07:42 dmarlin Exp $
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@ -50,6 +50,8 @@
* update of nand_chip structure description
* 01-17-2005 dmarlin added extended commands for AG-AND device and added option
* for BBT_AUTO_REFRESH.
* 01-20-2005 dmarlin added optional pointer to hardware specific callback for
* extra error status checks.
*/
#ifndef __LINUX_MTD_NAND_H
#define __LINUX_MTD_NAND_H
@ -164,7 +166,7 @@ extern int nand_read_raw (struct mtd_info *mtd, uint8_t *buf, loff_t from, size_
/*
* Constants for Hardware ECC
*/
*/
/* Reset Hardware ECC for read */
#define NAND_ECC_READ 0
/* Reset Hardware ECC for write */
@ -172,6 +174,10 @@ extern int nand_read_raw (struct mtd_info *mtd, uint8_t *buf, loff_t from, size_
/* Enable Hardware ECC before syndrom is read back from flash */
#define NAND_ECC_READSYN 2
/* Bit mask for flags passed to do_nand_read_ecc */
#define NAND_GET_DEVICE 0x80
/* Option constants for bizarre disfunctionality and real
* features
*/
@ -308,6 +314,8 @@ struct nand_hw_control {
* @badblock_pattern: [REPLACEABLE] bad block scan pattern used for initial bad block scan
* @controller: [OPTIONAL] a pointer to a hardware controller structure which is shared among multiple independend devices
* @priv: [OPTIONAL] pointer to private chip date
* @errstat: [OPTIONAL] hardware specific function to perform additional error status checks
* (determine if errors are correctable)
*/
struct nand_chip {
@ -363,6 +371,7 @@ struct nand_chip {
struct nand_bbt_descr *badblock_pattern;
struct nand_hw_control *controller;
void *priv;
int (*errstat)(struct mtd_info *mtd, struct nand_chip *this, int state, int status, int page);
};
/*
@ -484,6 +493,9 @@ extern int nand_update_bbt (struct mtd_info *mtd, loff_t offs);
extern int nand_default_bbt (struct mtd_info *mtd);
extern int nand_isbad_bbt (struct mtd_info *mtd, loff_t offs, int allowbbt);
extern int nand_erase_nand (struct mtd_info *mtd, struct erase_info *instr, int allowbbt);
extern int nand_do_read_ecc (struct mtd_info *mtd, loff_t from, size_t len,
size_t * retlen, u_char * buf, u_char * oob_buf,
struct nand_oobinfo *oobsel, int flags);
/*
* Constants for oob configuration