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

mtd: nand: davinci_nand, 4-bit ECC for smallpage

Browse Source 
Minimal support for the 4-bit ECC engine found on DM355, DM365,
DA830/OMAP-L137, and similar recent DaVinci-family chips.

This is limited to small-page flash for now; there are some page
layout issues for large page chips.  Note that most boards using
this engine (like the DM355 EVM) include 2GiB large page chips.

Sanity tested on DM355 EVM after swapping the socketed NAND for
a small-page one.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
David Brownell
2009-04-21 19:58:13 -07:00
committed by David Woodhouse
parent 533a014914
commit 6a4123e581
2 changed files with 298 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
arch/arm/mach-davinci/include/mach/nand.h
View File

@@ -68,10 +68,14 @@ struct davinci_nand_pdata { /* platform_data */
/* none == NAND_ECC_NONE (strongly *not* advised!!)
* soft == NAND_ECC_SOFT
* 1-bit == NAND_ECC_HW
* 4-bit == NAND_ECC_HW_SYNDROME (not on all chips)
* else == NAND_ECC_HW, according to ecc_bits
*
* All DaVinci-family chips support 1-bit hardware ECC.
* Newer ones also support 4-bit ECC, but are awkward
* using it with large page chips.
*/
nand_ecc_modes_t ecc_mode;
u8 ecc_bits;
/* e.g. NAND_BUSWIDTH_16 or NAND_USE_FLASH_BBT */
unsigned options;