lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[JFFS2] Add support for JFFS2-on-Dataflash devices.

Browse Source 
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>
This commit is contained in:
Andrew Victor
2005-02-09 09:17:45 +00:00
committed by Thomas Gleixner
parent 3be36675d4
commit 8f15fd55f9
9 changed files with 98 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
fs/jffs2/os-linux.h
View File

@@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
* $Id: os-linux.h,v 1.52 2005/02/09 09:09:01 pavlov Exp $
* $Id: os-linux.h,v 1.53 2005/02/09 09:17:41 pavlov Exp $
*
*/
@@ -97,12 +97,16 @@ static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
#endif
}
#ifdef CONFIG_JFFS2_FS_DATAFLASH
#define SECTOR_ADDR(x) ( ((unsigned long)(x) / (unsigned long)(c->sector_size)) * c->sector_size )
#else
#define SECTOR_ADDR(x) ( ((unsigned long)(x) & ~(c->sector_size-1)) )
#endif
#define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY)
#define jffs2_is_writebuffered(c) (c->wbuf != NULL)
#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)
#define jffs2_can_mark_obsolete(c) (1)
#define jffs2_cleanmarker_oob(c) (0)
#define jffs2_write_nand_cleanmarker(c,jeb) (-EIO)
@@ -119,6 +123,7 @@ static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
#define jffs2_wbuf_timeout NULL
#define jffs2_wbuf_process NULL
#define jffs2_nor_ecc(c) (0)
#define jffs2_dataflash(c) (0)
#define jffs2_nor_ecc_flash_setup(c) (0)
#define jffs2_nor_ecc_flash_cleanup(c) do {} while (0)
@@ -154,6 +159,15 @@ void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c);
#define jffs2_nor_ecc_flash_setup(c) (0)
#define jffs2_nor_ecc_flash_cleanup(c) do {} while (0)
#endif /* NOR ECC */
#ifdef CONFIG_JFFS2_FS_DATAFLASH
#define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH)
int jffs2_dataflash_setup(struct jffs2_sb_info *c);
void jffs2_dataflash_cleanup(struct jffs2_sb_info *c);
#else
#define jffs2_dataflash(c) (0)
#define jffs2_dataflash_setup(c) (0)
#define jffs2_dataflash_cleanup(c) do {} while (0)
#endif /* DATAFLASH */
#endif /* NAND */
/* erase.c */