[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 <dmarlin@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/drivers/mtd/nand/nand_ids.c b/drivers/mtd/nand/nand_ids.c
index 2d8c432..9756797 100644 (file)
--- a/drivers/mtd/nand/nand_ids.c
+++ b/drivers/mtd/nand/nand_ids.c
@@ -3,7 +3,7 @@
  *
  *  Copyright (C) 2002 Thomas Gleixner (tglx@linutronix.de)
   *
- * $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
index 9a19c65..0118128 100644 (file)
--- 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 1.68 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_info *mtd, uint8_t *buf, loff_t from, size_
 #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_info *mtd, uint8_t *buf, loff_t from, size_
 /* 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 \