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Commit e7049f29 authored by Boris Brezillon's avatar Boris Brezillon
Browse files

mtd: nand: sh_flctl: switch to mtd_ooblayout_ops 



Implementing the mtd_ooblayout_ops interface is the new way of exposing
ECC/OOB layout to MTD users.

Signed-off-by: default avatarBoris Brezillon <boris.brezillon@free-electrons.com>
parent bf01e06b

drivers/mtd/nand/sh_flctl.c

+67 −20
Original line number Diff line number Diff line
@@ -43,26 +43,73 @@ 
#include <linux/mtd/partitions.h>

#include <linux/mtd/sh_flctl.h>



static struct nand_ecclayout flctl_4secc_oob_16 = {

	.eccbytes = 10,

	.eccpos = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9},

	.oobfree = {

		{.offset = 12,

		. length = 4} },

static int flctl_4secc_ooblayout_sp_ecc(struct mtd_info *mtd, int section,

					struct mtd_oob_region *oobregion)

{

	struct nand_chip *chip = mtd_to_nand(mtd);



	if (section)

		return -ERANGE;



	oobregion->offset = 0;

	oobregion->length = chip->ecc.bytes;



	return 0;

}



static int flctl_4secc_ooblayout_sp_free(struct mtd_info *mtd, int section,

					 struct mtd_oob_region *oobregion)

{

	if (section)

		return -ERANGE;



	oobregion->offset = 12;

	oobregion->length = 4;



	return 0;

}



static const struct mtd_ooblayout_ops flctl_4secc_oob_smallpage_ops = {

	.ecc = flctl_4secc_ooblayout_sp_ecc,

	.free = flctl_4secc_ooblayout_sp_free,

};



static struct nand_ecclayout flctl_4secc_oob_64 = {

	.eccbytes = 4 * 10,

	.eccpos = {

		 6,  7,  8,  9, 10, 11, 12, 13, 14, 15,

		22, 23, 24, 25, 26, 27, 28, 29, 30, 31,

		38, 39, 40, 41, 42, 43, 44, 45, 46, 47,

		54, 55, 56, 57, 58, 59, 60, 61, 62, 63 },

	.oobfree = {

		{.offset =  2, .length = 4},

		{.offset = 16, .length = 6},

		{.offset = 32, .length = 6},

		{.offset = 48, .length = 6} },

static int flctl_4secc_ooblayout_lp_ecc(struct mtd_info *mtd, int section,

					struct mtd_oob_region *oobregion)

{

	struct nand_chip *chip = mtd_to_nand(mtd);



	if (section >= chip->ecc.steps)

		return -ERANGE;



	oobregion->offset = (section * 16) + 6;

	oobregion->length = chip->ecc.bytes;



	return 0;

}



static int flctl_4secc_ooblayout_lp_free(struct mtd_info *mtd, int section,

					 struct mtd_oob_region *oobregion)

{

	struct nand_chip *chip = mtd_to_nand(mtd);



	if (section >= chip->ecc.steps)

		return -ERANGE;



	oobregion->offset = section * 16;

	oobregion->length = 6;



	if (!section) {

		oobregion->offset += 2;

		oobregion->length -= 2;

	}



	return 0;

}



static const struct mtd_ooblayout_ops flctl_4secc_oob_largepage_ops = {

	.ecc = flctl_4secc_ooblayout_lp_ecc,

	.free = flctl_4secc_ooblayout_lp_free,

};



static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
@@ -987,10 +1034,10 @@ static int flctl_chip_init_tail(struct mtd_info *mtd) 


	if (flctl->hwecc) {

		if (mtd->writesize == 512) {

			chip->ecc.layout = &flctl_4secc_oob_16;

			mtd_set_ooblayout(mtd, &flctl_4secc_oob_smallpage_ops);

			chip->badblock_pattern = &flctl_4secc_smallpage;

		} else {

			chip->ecc.layout = &flctl_4secc_oob_64;

			mtd_set_ooblayout(mtd, &flctl_4secc_oob_largepage_ops);

			chip->badblock_pattern = &flctl_4secc_largepage;

		}