With onfi a flash is organized into one or more logical units (LUNs). A logical unit (LUN) is the minimum unit that can independently execute commands and report status.
Mtd does not exploit LUN, so make it see a big single flash where size is lun_size * number_of_lun.
Without this patch MT29F8G08ADBDAH4 size is 512MiB instead of 1GiB.
Artem: split long line on 2 shorter ones.
This is commit 637957551c0ac80de8dfc7650d320c5a98c2c0c0 from Linux
Signed-off-by: Matthieu Castet matthieu.castet@parrot.com Acked-by: Florian Fainelli ffainelli@freebox.fr Signed-off-by: Artem Bityutskiy artem.bityutskiy@linux.intel.com Signed-off-by: David Woodhouse David.Woodhouse@intel.com [scottwood@freescale.com: picked from Linux into U-Boot] Reported-by: Rafael Beims rafael.beims@gmail.com Signed-off-by: Scott Wood scottwood@freescale.com --- Rafael submitted http://patchwork.ozlabs.org/patch/168820/ to fix this, but the patch was corrupt so I picked the equivalent fix out of Linux (better to have them synced anyway).
Applied to u-boot-nand-flash.
drivers/mtd/nand/nand_base.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index bfd668f..50bfb65 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -2573,7 +2573,8 @@ static int nand_flash_detect_onfi(struct mtd_info *mtd, struct nand_chip *chip, mtd->writesize = le32_to_cpu(p->byte_per_page); mtd->erasesize = le32_to_cpu(p->pages_per_block) * mtd->writesize; mtd->oobsize = le16_to_cpu(p->spare_bytes_per_page); - chip->chipsize = (uint64_t)le32_to_cpu(p->blocks_per_lun) * mtd->erasesize; + chip->chipsize = le32_to_cpu(p->blocks_per_lun); + chip->chipsize *= (uint64_t)mtd->erasesize * p->lun_count; *busw = 0; if (le16_to_cpu(p->features) & 1) *busw = NAND_BUSWIDTH_16;