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ARM: at91: atmel_nand: pmecc driver will select the galois table by sector size

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Define the galois index table offset in chip head file. So user do not need
to set by himself. Driver will set it correctly according to sector_size.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Acked-by: Scott Wood <scottwood@freescale.com>
[rebased on master]
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
This commit is contained in:
Wu, Josh 2013-07-03 11:11:45 +08:00 committed by Andreas Bießmann
parent ce76f0aac6
commit b2d96dc28f
5 changed files with 10 additions and 17 deletions
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6
arch/arm/include/asm/arch-at91/at91sam9x5.h
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@ -161,6 +161,12 @@
#define ATMEL_PMC_UHP AT91SAM926x_PMC_UHP
#define ATMEL_ID_UHP ATMEL_ID_UHPHS
/*
* PMECC table in ROM
*/
#define ATMEL_PMECC_INDEX_OFFSET_512 0x8000
#define ATMEL_PMECC_INDEX_OFFSET_1024 0x10000
/*
* at91sam9x5 specific prototypes
*/

14
doc/README.atmel_pmecc
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@ -19,17 +19,6 @@ To use PMECC in this driver, the user needs to set:
It can be 2, 4, 8, 12 or 24.
2. The PMECC sector size: CONFIG_PMECC_SECTOR_SIZE.
It only can be 512 or 1024.
3. The PMECC index lookup table's offsets in ROM code: CONFIG_PMECC_INDEX_TABLE_OFFSET.
In the chip datasheet section "Boot Stragegies", you can find
two Galois Field Table in the ROM code. One table is for 512-bytes
sector. Another is for 1024-byte sector. Each Galois Field includes
two sub-table: indext table & alpha table.
In the beginning of each Galois Field Table is the index table,
Alpha table is in the following.
So the index table's offset is same as the Galois Field Table.
Please set CONFIG_PMECC_INDEX_TABLE_OFFSET correctly according the
Galois Field Table's offset base on the sector size you used.
Take AT91SAM9X5EK as an example, the board definition file likes:
@ -38,7 +27,4 @@ Take AT91SAM9X5EK as an example, the board definition file likes:
#define CONFIG_ATMEL_NAND_HW_PMECC 1
#define CONFIG_PMECC_CAP 2
#define CONFIG_PMECC_SECTOR_SIZE 512
#define CONFIG_PMECC_INDEX_TABLE_OFFSET 0x8000
NOTE: If you use 1024 as the sector size, then need set 0x10000 as the
CONFIG_PMECC_INDEX_TABLE_OFFSET

5
drivers/mtd/nand/atmel_nand.c
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@ -637,7 +637,10 @@ static int atmel_pmecc_nand_init_params(struct nand_chip *nand,
cap = host->pmecc_corr_cap = CONFIG_PMECC_CAP;
sector_size = host->pmecc_sector_size = CONFIG_PMECC_SECTOR_SIZE;
host->pmecc_index_table_offset = CONFIG_PMECC_INDEX_TABLE_OFFSET;
if (host->pmecc_sector_size == 512)
host->pmecc_index_table_offset = ATMEL_PMECC_INDEX_OFFSET_512;
else
host->pmecc_index_table_offset = ATMEL_PMECC_INDEX_OFFSET_1024;
MTDDEBUG(MTD_DEBUG_LEVEL1,
"Initialize PMECC params, cap: %d, sector: %d\n",

1
include/configs/at91sam9x5ek.h
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@ -121,7 +121,6 @@
#define CONFIG_ATMEL_NAND_HW_PMECC 1
#define CONFIG_PMECC_CAP 2
#define CONFIG_PMECC_SECTOR_SIZE 512
#define CONFIG_PMECC_INDEX_TABLE_OFFSET 0x8000
#define CONFIG_CMD_NAND_TRIMFFS

1
include/configs/sama5d3xek.h
View File

@ -126,7 +126,6 @@
#define CONFIG_ATMEL_NAND_HW_PMECC
#define CONFIG_PMECC_CAP 4
#define CONFIG_PMECC_SECTOR_SIZE 512
#define CONFIG_PMECC_INDEX_TABLE_OFFSET ATMEL_PMECC_INDEX_OFFSET_512
#define CONFIG_CMD_NAND_TRIMFFS
#endif