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Commit 8eeb4c52 authored by Baruch Siach's avatar Baruch Siach Committed by Brian Norris
Browse files

mtd: mxc_nand: generate nand_ecclayout for 8 bit ECC 



Hardware 8 bit ECC requires a different nand_ecclayout. Instead of adding yet
another static struct nand_ecclayout, generate it in code.

Reviewed-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: default avatarBaruch Siach <baruch@tkos.co.il>
Acked-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: default avatarBrian Norris <computersforpeace@gmail.com>
parent c19900ed

drivers/mtd/nand/mxc_nand.c

+21 −1
Original line number Diff line number Diff line
@@ -960,6 +960,23 @@ static int get_eccsize(struct mtd_info *mtd) 
		return 8;

}



static void ecc_8bit_layout_4k(struct nand_ecclayout *layout)

{

	int i, j;



	layout->eccbytes = 8*18;

	for (i = 0; i < 8; i++)

		for (j = 0; j < 18; j++)

			layout->eccpos[i*18 + j] = i*26 + j + 7;



	layout->oobfree[0].offset = 2;

	layout->oobfree[0].length = 4;

	for (i = 1; i < 8; i++) {

		layout->oobfree[i].offset = i*26;

		layout->oobfree[i].length = 7;

	}

}



static void preset_v1(struct mtd_info *mtd)

{

	struct nand_chip *nand_chip = mtd->priv;
@@ -1636,8 +1653,11 @@ static int mxcnd_probe(struct platform_device *pdev) 


	if (mtd->writesize == 2048)

		this->ecc.layout = host->devtype_data->ecclayout_2k;

	else if (mtd->writesize == 4096)

	else if (mtd->writesize == 4096) {

		this->ecc.layout = host->devtype_data->ecclayout_4k;

		if (get_eccsize(mtd) == 8)

			ecc_8bit_layout_4k(this->ecc.layout);

	}



	/*

	 * Experimentation shows that i.MX NFC can only handle up to 218 oob