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authorAndrew Victor <andrew@sanpeople.com>2005-02-09 10:17:45 +0100
committerThomas Gleixner <tglx@mtd.linutronix.de>2005-05-23 12:28:03 +0200
commit8f15fd55f9bf266139b10850947e19c4e3f4e9b7 (patch)
tree3df936efbffbbd6c20dd75f51780ac37458285ff /include
parent[JFFS2] Core changes required to support JFFS2-on-Dataflash devices. (diff)
downloadlinux-8f15fd55f9bf266139b10850947e19c4e3f4e9b7.tar.xz
linux-8f15fd55f9bf266139b10850947e19c4e3f4e9b7.zip
[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>
Diffstat (limited to 'include')
-rw-r--r--include/linux/jffs2_fs_sb.h4
-rw-r--r--include/mtd/mtd-abi.h3
2 files changed, 4 insertions, 3 deletions
diff --git a/include/linux/jffs2_fs_sb.h b/include/linux/jffs2_fs_sb.h
index 4afc8d8c2e9e..faec29559fed 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 @@ struct jffs2_sb_info {
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 c984cb2c9413..cacb9842b195 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 @@ struct mtd_oob_buf {
#define MTD_NORFLASH 3
#define MTD_NANDFLASH 4
#define MTD_PEROM 5
+#define MTD_DATAFLASH 6
#define MTD_OTHER 14
#define MTD_UNKNOWN 15