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: Eric Benard <ebenard@eukrea.com> Acked-by : Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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@ -857,6 +857,17 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
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}
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}
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/* Define some generic bad / good block scan pattern which are used
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* while scanning a device for factory marked good / bad blocks. */
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static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
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static struct nand_bbt_descr smallpage_memorybased = {
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.options = NAND_BBT_SCAN2NDPAGE,
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.offs = 5,
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.len = 1,
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.pattern = scan_ff_pattern
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};
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static int __init mxcnd_probe(struct platform_device *pdev)
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{
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struct nand_chip *this;
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@ -973,7 +984,10 @@ static int __init mxcnd_probe(struct platform_device *pdev)
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goto escan;
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}
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host->pagesize_2k = (mtd->writesize == 2048) ? 1 : 0;
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if (mtd->writesize == 2048) {
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host->pagesize_2k = 1;
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this->badblock_pattern = &smallpage_memorybased;
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}
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if (this->ecc.mode == NAND_ECC_HW) {
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switch (mtd->oobsize) {
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