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mtd: nand: pxa3xx: Consolidate ECC initialization

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In order to avoid code duplication, let's consolidate the ECC setting
for all SoC variants. Such decision is based on page size and ECC
strength requirements.

Also, provide a default value for the case where such ECC information
is not provided (non-ONFI devices).

Tested-by: Arnaud Ebalard <arno@natisbad.org>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Ezequiel Garcia 2013-12-18 18:44:10 -03:00 committed by Brian Norris
parent 5cbbdc6a9f
commit 30b2afc847
1 changed files with 16 additions and 24 deletions
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40
drivers/mtd/nand/pxa3xx_nand.c
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@ -1332,13 +1332,9 @@ static int pxa3xx_nand_sensing(struct pxa3xx_nand_info *info)
static int pxa_ecc_init(struct pxa3xx_nand_info *info,
struct nand_ecc_ctrl *ecc,
int strength, int page_size)
int strength, int ecc_stepsize, int page_size)
{
/*
* We don't use strength here as the PXA variant
* is used with non-ONFI compliant devices.
*/
if (page_size == 2048) {
if (strength == 1 && ecc_stepsize == 512 && page_size == 2048) {
info->chunk_size = 2048;
info->spare_size = 40;
info->ecc_size = 24;
@ -1347,7 +1343,7 @@ static int pxa_ecc_init(struct pxa3xx_nand_info *info,
ecc->strength = 1;
return 1;
} else if (page_size == 512) {
} else if (strength == 1 && ecc_stepsize == 512 && page_size == 512) {
info->chunk_size = 512;
info->spare_size = 8;
info->ecc_size = 8;
@ -1355,19 +1351,12 @@ static int pxa_ecc_init(struct pxa3xx_nand_info *info,
ecc->size = 512;
ecc->strength = 1;
return 1;
}
return 0;
}
static int armada370_ecc_init(struct pxa3xx_nand_info *info,
struct nand_ecc_ctrl *ecc,
int strength, int ecc_stepsize, int page_size)
{
/*
* Required ECC: 4-bit correction per 512 bytes
* Select: 16-bit correction per 2048 bytes
*/
if (strength == 4 && ecc_stepsize == 512 && page_size == 4096) {
} else if (strength == 4 && ecc_stepsize == 512 && page_size == 4096) {
info->ecc_bch = 1;
info->chunk_size = 2048;
info->spare_size = 32;
@ -1408,6 +1397,7 @@ static int pxa3xx_nand_scan(struct mtd_info *mtd)
uint32_t id = -1;
uint64_t chipsize;
int i, ret, num;
uint16_t ecc_strength, ecc_step;
if (pdata->keep_config && !pxa3xx_nand_detect_config(info))
goto KEEP_CONFIG;
@ -1502,15 +1492,17 @@ KEEP_CONFIG:
}
}
if (info->variant == PXA3XX_NAND_VARIANT_ARMADA370)
ret = armada370_ecc_init(info, &chip->ecc,
chip->ecc_strength_ds,
chip->ecc_step_ds,
mtd->writesize);
else
ret = pxa_ecc_init(info, &chip->ecc,
chip->ecc_strength_ds,
mtd->writesize);
ecc_strength = chip->ecc_strength_ds;
ecc_step = chip->ecc_step_ds;
/* Set default ECC strength requirements on non-ONFI devices */
if (ecc_strength < 1 && ecc_step < 1) {
ecc_strength = 1;
ecc_step = 512;
}
ret = pxa_ecc_init(info, &chip->ecc, ecc_strength,
ecc_step, mtd->writesize);
if (!ret) {
dev_err(&info->pdev->dev,
"ECC strength %d at page size %d is not supported\n",