[PATCH 0/3 v2] mtd: atmel_nand: add support for 8k page nand

[PATCH 0/3 v2] mtd: atmel_nand: add support for 8k page nand

[Raphael Poggi]

This patch series add support for 8k page NAND. This is done by
increasing chip_delay (20us to 40us) and enable PMECC for 8k nand.
A patch also fix bit error correction when using 1024 sector size with pmecc.

Raphaël Poggi (3):
        [PATCH 1/3] mtd: atmel_nand: increase chip_delay
        [PATCH 2/3] mtd: atmel_nand: fix bit error correction
        [PATCH 3/3] mtd: atmel_nand: enable PMECC for 8k page nand

 drivers/mtd/nand/atmel_nand.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)


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[PATCH 1/3 v2] mtd: atmel_nand: increase chip_delay

[Raphael Poggi]

Some nand like Micron MT29F32G08ABAAAWP need more than 20us.

Signed-off-by: Raphaël Poggi <poggi.raph@gmail.com>
Acked-by: Bo Shen <voice.shen@atmel.com>
---
 drivers/mtd/nand/atmel_nand.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index 3161e89..a02f38f 100644
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -1162,7 +1162,7 @@ static int __init atmel_nand_probe(struct device_d *dev)
 		nand_chip->ecc.mode = NAND_ECC_HW;
 	}
 
-	nand_chip->chip_delay = 20;		/* 20us command delay time */
+	nand_chip->chip_delay = 40;		/* 40us command delay time */
 
 	if (IS_ENABLED(CONFIG_NAND_ECC_BCH) &&
 			pdata->ecc_mode == NAND_ECC_SOFT_BCH) {
-- 
1.7.9.5


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[PATCH 2/3 v2] mtd: atmel_nand: fix bit error correction

[Raphael Poggi]

When pmecc uses a 1024 sector size to correct bit error, the gf dimension
must be 14.

So this commit chooses the right degree for different sector size (512 or 1024).

Signed-off-by: Raphaël Poggi <poggi.raph@gmail.com>
---
 drivers/mtd/nand/atmel_nand.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index a02f38f..1ce7d4d 100644
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -796,7 +796,8 @@ static int __init atmel_pmecc_nand_init_params(struct device_d *dev,
 	switch (mtd->writesize) {
 	case 2048:
 	case 4096:
-		host->pmecc_degree = PMECC_GF_DIMENSION_13;
+		host->pmecc_degree = (sector_size == 512) ?
+					PMECC_GF_DIMENSION_13 : PMECC_GF_DIMENSION_14;
 		host->pmecc_cw_len = (1 << host->pmecc_degree) - 1;
 		host->pmecc_sector_number = mtd->writesize / sector_size;
 		host->pmecc_bytes_per_sector = pmecc_get_ecc_bytes(
-- 
1.7.9.5


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[PATCH 3/3 v2] mtd: atmel_nand: enable PMECC for 8k page nand

[Raphael Poggi]

Enable the PMECC to support 8k page.

Signed-off-by: Raphaël Poggi <poggi.raph@gmail.com>
Acked-by: Bo Shen <voice.shen@atmel.com>
---
 drivers/mtd/nand/atmel_nand.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index 1ce7d4d..337e225 100644
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -796,6 +796,7 @@ static int __init atmel_pmecc_nand_init_params(struct device_d *dev,
 	switch (mtd->writesize) {
 	case 2048:
 	case 4096:
+	case 8192:
 		host->pmecc_degree = (sector_size == 512) ?
 					PMECC_GF_DIMENSION_13 : PMECC_GF_DIMENSION_14;
 		host->pmecc_cw_len = (1 << host->pmecc_degree) - 1;
-- 
1.7.9.5


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Re: [PATCH 0/3 v2] mtd: atmel_nand: add support for 8k page nand

[Sascha Hauer]

On Thu, Jul 17, 2014 at 02:12:18PM +0200, Raphael Poggi wrote:
> This patch series add support for 8k page NAND. This is done by
> increasing chip_delay (20us to 40us) and enable PMECC for 8k nand.
> A patch also fix bit error correction when using 1024 sector size with pmecc.
> 
> Raphaël Poggi (3):
>         [PATCH 1/3] mtd: atmel_nand: increase chip_delay
>         [PATCH 2/3] mtd: atmel_nand: fix bit error correction
>         [PATCH 3/3] mtd: atmel_nand: enable PMECC for 8k page nand

Applied, thanks

Sascha


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