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Commit 71b7d0d9 authored by Eric Benard's avatar Eric Benard Committed by David Woodhouse
Browse files

mtd: mxc_nand: fix 2KiB pagesize NAND on i.MX27 



This patch allows i.MX27 to support 2KiB pagesize NAND flash.
We are using a 1.8V NAND flash which datasheet (unfortunately only
available under NDA) says :
Page size: x8: 2,112 bytes (2,048 + 64 bytes).
Without this patch, all sectors are marked as bad eraseblock.

Signed-off-by: default avatarEric Benard <ebenard@eukrea.com>
Acked-by : Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent 64da392a

drivers/mtd/nand/mxc_nand.c

+15 −1
Original line number Diff line number Diff line
@@ -857,6 +857,17 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command, 
	}

}



/* Define some generic bad / good block scan pattern which are used

 * while scanning a device for factory marked good / bad blocks. */

static uint8_t scan_ff_pattern[] = { 0xff, 0xff };



static struct nand_bbt_descr smallpage_memorybased = {

	.options = NAND_BBT_SCAN2NDPAGE,

	.offs = 5,

	.len = 1,

	.pattern = scan_ff_pattern

};



static int __init mxcnd_probe(struct platform_device *pdev)

{

	struct nand_chip *this;
@@ -973,7 +984,10 @@ static int __init mxcnd_probe(struct platform_device *pdev) 
		goto escan;

	}



	host->pagesize_2k = (mtd->writesize == 2048) ? 1 : 0;

	if (mtd->writesize == 2048) {

		host->pagesize_2k = 1;

		this->badblock_pattern = &smallpage_memorybased;

	}



	if (this->ecc.mode == NAND_ECC_HW) {

		switch (mtd->oobsize) {