tree fb1e6e5f98bf348d019d586d47be0e89466c98cf
parent 8ea2e06fc8d2f03b49cef7732ae8e290e2f0b183
author David A. Marlin <[EMAIL PROTECTED]> Mon, 17 Jan 2005 18:29:21 +0000
committer Thomas Gleixner <[EMAIL PROTECTED]> Mon, 23 May 2005 11:22:05 +0200
[MTD] NAND extended commands, badb block table autorefresh
Added extended commands for AG-AND device and added
option for BBT_AUTO_REFRESH.
Signed-off-by: David A. Marlin <[EMAIL PROTECTED]>
Signed-off-by: Thomas Gleixner <[EMAIL PROTECTED]>
drivers/mtd/nand/nand_ids.c | 4 ++--
include/linux/mtd/nand.h | 27 ++++++++++++++++++++++++++-
2 files changed, 28 insertions(+), 3 deletions(-)
diff --git a/drivers/mtd/nand/nand_ids.c b/drivers/mtd/nand/nand_ids.c
--- a/drivers/mtd/nand/nand_ids.c
+++ b/drivers/mtd/nand/nand_ids.c
@@ -3,7 +3,7 @@
*
* Copyright (C) 2002 Thomas Gleixner ([EMAIL PROTECTED])
*
- * $Id: nand_ids.c,v 1.10 2004/05/26 13:40:12 gleixner Exp $
+ * $Id: nand_ids.c,v 1.11 2005/01/17 18:26:27 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
@@ -103,7 +103,7 @@ struct nand_flash_dev nand_flash_ids[] =
* Anyway JFFS2 would increase the eraseblock size so we chose a
combined one which can be erased in one go
* There are more speed improvements for reads and writes possible, but
not implemented now
*/
- {"AND 128MiB 3,3V 8-bit", 0x01, 2048, 128, 0x4000, NAND_IS_AND |
NAND_NO_AUTOINCR | NAND_4PAGE_ARRAY},
+ {"AND 128MiB 3,3V 8-bit", 0x01, 2048, 128, 0x4000, NAND_IS_AND |
NAND_NO_AUTOINCR | NAND_4PAGE_ARRAY | BBT_AUTO_REFRESH},
{NULL,}
};
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -5,7 +5,7 @@
* Steven J. Hill <[EMAIL PROTECTED]>
* Thomas Gleixner <[EMAIL PROTECTED]>
*
- * $Id: nand.h,v 1.68 2004/11/12 10:40:37 gleixner Exp $
+ * $Id: nand.h,v 1.69 2005/01/17 18:29:18 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
@@ -48,6 +48,8 @@
* 02-08-2004 tglx added option field to nand structure for chip
anomalities
* 05-25-2004 tglx added bad block table support, ST-MICRO manufacturer id
* update of nand_chip structure description
+ * 01-17-2005 dmarlin added extended commands for AG-AND device and added
option
+ * for BBT_AUTO_REFRESH.
*/
#ifndef __LINUX_MTD_NAND_H
#define __LINUX_MTD_NAND_H
@@ -115,6 +117,25 @@ extern int nand_read_raw (struct mtd_inf
#define NAND_CMD_READSTART 0x30
#define NAND_CMD_CACHEDPROG 0x15
+/* Extended commands for AG-AND device */
+/*
+ * Note: the command for NAND_CMD_DEPLETE1 is really 0x00 but
+ * there is no way to distinguish that from NAND_CMD_READ0
+ * until the remaining sequence of commands has been completed
+ * so add a high order bit and mask it off in the command.
+ */
+#define NAND_CMD_DEPLETE1 0x100
+#define NAND_CMD_DEPLETE2 0x38
+#define NAND_CMD_STATUS_MULTI 0x71
+#define NAND_CMD_STATUS_ERROR 0x72
+/* multi-bank error status (banks 0-3) */
+#define NAND_CMD_STATUS_ERROR0 0x73
+#define NAND_CMD_STATUS_ERROR1 0x74
+#define NAND_CMD_STATUS_ERROR2 0x75
+#define NAND_CMD_STATUS_ERROR3 0x76
+#define NAND_CMD_STATUS_RESET 0x7f
+#define NAND_CMD_STATUS_CLEAR 0xff
+
/* Status bits */
#define NAND_STATUS_FAIL 0x01
#define NAND_STATUS_FAIL_N1 0x02
@@ -170,6 +191,10 @@ extern int nand_read_raw (struct mtd_inf
/* Chip has a array of 4 pages which can be read without
* additional ready /busy waits */
#define NAND_4PAGE_ARRAY 0x00000040
+/* Chip requires that BBT is periodically rewritten to prevent
+ * bits from adjacent blocks from 'leaking' in altering data.
+ * This happens with the Renesas AG-AND chips, possibly others. */
+#define BBT_AUTO_REFRESH 0x00000080
/* Options valid for Samsung large page devices */
#define NAND_SAMSUNG_LP_OPTIONS \
-
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