[JFFS2] Add support for JFFS2-on-Dataflash devices.
For Dataflash, can_mark_obsolete = false and the NAND write buffering
code (wbuf.c) is used.
Since the DataFlash chip will automatically erase pages when writing,
the cleanmarkers are not needed - so cleanmarker_oob = false and
cleanmarker_size = 0
DataFlash page-sizes are not a power of two (they're multiples of 528
bytes). The SECTOR_ADDR macro (added in the previous core patch) is
replaced with a (slower) div/mod version if CONFIG_JFFS2_FS_DATAFLASH is
selected.
Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/linux/jffs2_fs_sb.h b/include/linux/jffs2_fs_sb.h
index 4afc8d8..faec2955 100644
--- a/include/linux/jffs2_fs_sb.h
+++ b/include/linux/jffs2_fs_sb.h
@@ -1,4 +1,4 @@
-/* $Id: jffs2_fs_sb.h,v 1.48 2004/11/20 10:41:12 dwmw2 Exp $ */
+/* $Id: jffs2_fs_sb.h,v 1.49 2005/02/09 09:17:41 pavlov Exp $ */
#ifndef _JFFS2_FS_SB
#define _JFFS2_FS_SB
@@ -94,7 +94,7 @@
to an obsoleted node. I don't like this. Alternatives welcomed. */
struct semaphore erase_free_sem;
-#if defined CONFIG_JFFS2_FS_NAND || defined CONFIG_JFFS2_FS_NOR_ECC
+#if defined CONFIG_JFFS2_FS_NAND || defined CONFIG_JFFS2_FS_NOR_ECC || defined CONFIG_JFFS2_FS_DATAFLASH
/* Write-behind buffer for NAND flash */
unsigned char *wbuf;
uint32_t wbuf_ofs;
diff --git a/include/mtd/mtd-abi.h b/include/mtd/mtd-abi.h
index c984cb2..cacb984 100644
--- a/include/mtd/mtd-abi.h
+++ b/include/mtd/mtd-abi.h
@@ -1,5 +1,5 @@
/*
- * $Id: mtd-abi.h,v 1.9 2005/02/08 17:45:52 nico Exp $
+ * $Id: mtd-abi.h,v 1.10 2005/02/09 09:17:42 pavlov Exp $
*
* Portions of MTD ABI definition which are shared by kernel and user space
*/
@@ -29,6 +29,7 @@
#define MTD_NORFLASH 3
#define MTD_NANDFLASH 4
#define MTD_PEROM 5
+#define MTD_DATAFLASH 6
#define MTD_OTHER 14
#define MTD_UNKNOWN 15