Commit 30b2afc8 authored by Ezequiel Garcia's avatar Ezequiel Garcia Committed by Brian Norris
Browse files

mtd: nand: pxa3xx: Consolidate ECC initialization 



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: default avatarArnaud Ebalard <arno@natisbad.org>
Signed-off-by: default avatarEzequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: default avatarBrian Norris <computersforpeace@gmail.com>
parent 5cbbdc6a

drivers/mtd/nand/pxa3xx_nand.c

+16 −24
Original line number Diff line number Diff line
@@ -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 @@ static int pxa3xx_nand_scan(struct mtd_info *mtd) 
		}

	}



	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",