From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail.phycore.de ([217.6.246.34] helo=root.phytec.de) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dIH4A-0006mS-DZ for barebox@lists.infradead.org; Tue, 06 Jun 2017 16:10:48 +0000 Received: from idefix.phytec.de (idefix.phytec.de [172.16.0.10]) by root.phytec.de (Postfix) with ESMTP id 25ADFA00269 for ; Tue, 6 Jun 2017 18:11:26 +0200 (CEST) From: Daniel Schultz Date: Tue, 6 Jun 2017 18:10:25 +0200 Message-Id: <1496765425-9702-1-git-send-email-d.schultz@phytec.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH] mtd: nand: omap: Fix BCH bit correction To: barebox@lists.infradead.org After commit dec7b4d2bf9 was applied our barebox only corrected the first 512 Bytes of NAND pages. This patch separates between Hamming and BCH when finding out the eccsteps, because BCH always works with 2kB pages. Before this patch: barebox@Phytec phyCORE AM335x:/ nand_bitflip -r -n 5 /dev/nand0.barebox nand0.barebox: Flipping bit 5 @ 1796 nand0.barebox: Flipping bit 6 @ 1258 nand0.barebox: Flipping bit 5 @ 1062 nand0.barebox: Flipping bit 2 @ 1399 nand0.barebox: Flipping bit 6 @ 1243 No bitflips found on block 0, offset 0x00000000 barebox@Phytec phyCORE AM335x:/ nand_bitflip -r -n 5 /dev/nand0.barebox nand0.barebox: Flipping bit 2 @ 872 nand0.barebox: Flipping bit 4 @ 252 nand0.barebox: Flipping bit 3 @ 568 nand0.barebox: Flipping bit 2 @ 247 nand0.barebox: Flipping bit 5 @ 401 page at block 0, offset 0x00000000 has 3 bitflips After this patch: barebox@Phytec phyCORE AM335x:/ nand_bitflip -r -n 5 /dev/nand0.barebox nand0.barebox: Flipping bit 2 @ 1962 nand0.barebox: Flipping bit 0 @ 1563 nand0.barebox: Flipping bit 0 @ 1808 nand0.barebox: Flipping bit 6 @ 1460 nand0.barebox: Flipping bit 7 @ 2034 page at block 0, offset 0x00000000 has 5 bitflips barebox@Phytec phyCORE AM335x:/ nand_bitflip -r -n 5 /dev/nand0.barebox nand0.barebox: Flipping bit 1 @ 1352 nand0.barebox: Flipping bit 7 @ 1542 nand0.barebox: Flipping bit 2 @ 1021 nand0.barebox: Flipping bit 7 @ 691 nand0.barebox: Flipping bit 6 @ 1196 page at block 0, offset 0x00000000 has 10 bitflips, needs cleanup Signed-off-by: Daniel Schultz --- drivers/mtd/nand/nand_omap_gpmc.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/nand/nand_omap_gpmc.c b/drivers/mtd/nand/nand_omap_gpmc.c index 05c8486..61220da 100644 --- a/drivers/mtd/nand/nand_omap_gpmc.c +++ b/drivers/mtd/nand/nand_omap_gpmc.c @@ -302,10 +302,17 @@ static int omap_correct_bch(struct mtd_info *mtd, uint8_t *dat, unsigned int err_loc[8]; int bitflip_count; int bch_max_err; + int eccsteps; - int eccsteps = (nand->ecc.mode == NAND_ECC_HW) && - (nand->ecc.size == 2048) ? 4 : 1; int eccsize = oinfo->nand.ecc.bytes; + if (oinfo->ecc_mode == OMAP_ECC_HAMMING_CODE_HW_ROMCODE) + if ((nand->ecc.mode == NAND_ECC_HW) && + (nand->ecc.size == 2048)) + eccsteps = 4; + else + eccsteps = 1; + else + eccsteps = oinfo->nand.ecc.steps; switch (oinfo->ecc_mode) { case OMAP_ECC_BCH8_CODE_HW: -- 1.9.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox