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authorAndrew Victor <andrew@sanpeople.com>2005-02-09 09:17:45 +0000
committerThomas Gleixner <tglx@mtd.linutronix.de>2005-05-23 12:28:03 +0200
commit8f15fd55f9bf266139b10850947e19c4e3f4e9b7 (patch)
tree3df936efbffbbd6c20dd75f51780ac37458285ff /fs/jffs2/fs.c
parent3be36675d41a30ed3b192f92684f1417aa0f8bfe (diff)
downloadop-kernel-dev-8f15fd55f9bf266139b10850947e19c4e3f4e9b7.zip
op-kernel-dev-8f15fd55f9bf266139b10850947e19c4e3f4e9b7.tar.gz
[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 'fs/jffs2/fs.c')
-rw-r--r--fs/jffs2/fs.c21
1 files changed, 20 insertions, 1 deletions
diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
index 30ab233..5b7c960 100644
--- a/fs/jffs2/fs.c
+++ b/fs/jffs2/fs.c
@@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: fs.c,v 1.51 2004/11/28 12:19:37 dedekind Exp $
+ * $Id: fs.c,v 1.52 2005/02/09 09:17:40 pavlov Exp $
*
*/
@@ -456,6 +456,12 @@ int jffs2_do_fill_super(struct super_block *sb, void *data, int silent)
return -EINVAL;
}
#endif
+#ifndef CONFIG_JFFS2_FS_DATAFLASH
+ if (c->mtd->type == MTD_DATAFLASH) {
+ printk(KERN_ERR "jffs2: Cannot operate on DataFlash unless jffs2 DataFlash support is compiled in.\n");
+ return -EINVAL;
+ }
+#endif
c->flash_size = c->mtd->size;
@@ -661,6 +667,14 @@ static int jffs2_flash_setup(struct jffs2_sb_info *c) {
if (ret)
return ret;
}
+
+ /* and Dataflash */
+ if (jffs2_dataflash(c)) {
+ ret = jffs2_dataflash_setup(c);
+ if (ret)
+ return ret;
+ }
+
return ret;
}
@@ -674,4 +688,9 @@ void jffs2_flash_cleanup(struct jffs2_sb_info *c) {
if (jffs2_nor_ecc(c)) {
jffs2_nor_ecc_flash_cleanup(c);
}
+
+ /* and DataFlash */
+ if (jffs2_dataflash(c)) {
+ jffs2_dataflash_cleanup(c);
+ }
}
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