[MTD] NAND Add optional ECC status check callback
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>
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 0118128..cf52f20 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -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 @@
/*
* Constants for Hardware ECC
-*/
+ */
/* Reset Hardware ECC for read */
#define NAND_ECC_READ 0
/* Reset Hardware ECC for write */
@@ -172,6 +174,10 @@
/* 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 @@
* @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_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_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