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* [PATCH 1/2] nand: brcmnand: improve hamming oob layout
@ 2020-05-04  9:30 ` Álvaro Fernández Rojas
  0 siblings, 0 replies; 55+ messages in thread
From: Álvaro Fernández Rojas @ 2020-05-04  9:30 UTC (permalink / raw)
  To: computersforpeace, kdasu.kdev, miquel.raynal, richard, vigneshr,
	sumit.semwal, linux-mtd, bcm-kernel-feedback-list, linux-kernel,
	linux-media, dri-devel, linaro-mm-sig
  Cc: Álvaro Fernández Rojas

The current code generates 8 oob sections:
S1	1-5
ECC	6-8
S2	9-15
S3	16-21
ECC	22-24
S4	25-31
S5	32-37
ECC	38-40
S6	41-47
S7	48-53
ECC	54-56
S8	57-63

Change it by merging continuous sections:
S1	1-5
ECC	6-8
S2	9-21
ECC	22-24
S3	25-37
ECC	38-40
S4	41-53
ECC	54-56
S5	57-63

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
---
 drivers/mtd/nand/raw/brcmnand/brcmnand.c | 28 +++++++++---------------
 1 file changed, 10 insertions(+), 18 deletions(-)

diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
index e4e3ceeac38f..1bba309c7684 100644
--- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
+++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
@@ -1100,29 +1100,21 @@ static int brcmnand_hamming_ooblayout_free(struct mtd_info *mtd, int section,
 	struct brcmnand_cfg *cfg = &host->hwcfg;
 	int sas = cfg->spare_area_size << cfg->sector_size_1k;
 	int sectors = cfg->page_size / (512 << cfg->sector_size_1k);
+	u32 next;
 
-	if (section >= sectors * 2)
+	if (section > sectors)
 		return -ERANGE;
 
-	oobregion->offset = (section / 2) * sas;
+	next = (section * sas);
+	if (section < sectors)
+		next += 6;
 
-	if (section & 1) {
-		oobregion->offset += 9;
-		oobregion->length = 7;
-	} else {
-		oobregion->length = 6;
+	if (section)
+		oobregion->offset = ((section - 1) * sas) + 9;
+	else
+		oobregion->offset = 1; /* BBI */
 
-		/* First sector of each page may have BBI */
-		if (!section) {
-			/*
-			 * Small-page NAND use byte 6 for BBI while large-page
-			 * NAND use byte 0.
-			 */
-			if (cfg->page_size > 512)
-				oobregion->offset++;
-			oobregion->length--;
-		}
-	}
+	oobregion->length = next - oobregion->offset;
 
 	return 0;
 }
-- 
2.26.2


^ permalink raw reply related	[flat|nested] 55+ messages in thread

end of thread, other threads:[~2020-05-25  7:23 UTC | newest]

Thread overview: 55+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-05-04  9:30 [PATCH 1/2] nand: brcmnand: improve hamming oob layout Álvaro Fernández Rojas
2020-05-04  9:30 ` Álvaro Fernández Rojas
2020-05-04  9:30 ` Álvaro Fernández Rojas
2020-05-04  9:30 ` [PATCH 2/2] nand: brcmnand: fix BBI in " Álvaro Fernández Rojas
2020-05-04  9:30   ` Álvaro Fernández Rojas
2020-05-04  9:30   ` Álvaro Fernández Rojas
2020-05-04 18:59 ` [PATCH v2 1/2] nand: brcmnand: improve " Álvaro Fernández Rojas
2020-05-04 18:59   ` Álvaro Fernández Rojas
2020-05-04 18:59   ` Álvaro Fernández Rojas
2020-05-04 18:59   ` [PATCH v2 2/2] nand: brcmnand: fix " Álvaro Fernández Rojas
2020-05-04 18:59     ` Álvaro Fernández Rojas
2020-05-04 18:59     ` Álvaro Fernández Rojas
2020-05-11 16:34   ` [PATCH v2 1/2] nand: brcmnand: improve " Miquel Raynal
2020-05-11 16:34     ` Miquel Raynal
2020-05-12  6:00   ` [PATCH v3 0/2] mtd: rawnand: " Álvaro Fernández Rojas
2020-05-12  6:00     ` Álvaro Fernández Rojas
2020-05-12  6:00     ` Álvaro Fernández Rojas
2020-05-12  6:00     ` [PATCH v3 1/2] mtd: rawnand: brcmnand: fix " Álvaro Fernández Rojas
2020-05-12  6:00       ` Álvaro Fernández Rojas
2020-05-12  6:00       ` Álvaro Fernández Rojas
2020-05-19 11:49       ` Sasha Levin
2020-05-12  6:00     ` [PATCH v3 2/2] mtd: rawnand: brcmnand: improve " Álvaro Fernández Rojas
2020-05-12  6:00       ` Álvaro Fernández Rojas
2020-05-12  6:00       ` Álvaro Fernández Rojas
2020-05-12  7:08       ` Miquel Raynal
2020-05-12  7:08         ` Miquel Raynal
2020-05-12  7:08         ` Miquel Raynal
2020-05-12  7:12         ` Álvaro Fernández Rojas
2020-05-12  7:12           ` Álvaro Fernández Rojas
2020-05-12  7:12           ` Álvaro Fernández Rojas
2020-05-12  7:19           ` Miquel Raynal
2020-05-12  7:19             ` Miquel Raynal
2020-05-12  7:19             ` Miquel Raynal
2020-05-12  7:26             ` Álvaro Fernández Rojas
2020-05-12  7:26               ` Álvaro Fernández Rojas
2020-05-12  7:26               ` Álvaro Fernández Rojas
2020-05-12  7:41               ` Miquel Raynal
2020-05-12  7:41                 ` Miquel Raynal
2020-05-12  7:41                 ` Miquel Raynal
2020-05-12  7:57     ` [PATCH v4 0/2] " Álvaro Fernández Rojas
2020-05-12  7:57       ` Álvaro Fernández Rojas
2020-05-12  7:57       ` Álvaro Fernández Rojas
2020-05-12  7:57       ` [PATCH v4 1/2] mtd: rawnand: brcmnand: fix " Álvaro Fernández Rojas
2020-05-12  7:57         ` Álvaro Fernández Rojas
2020-05-12  7:57         ` Álvaro Fernández Rojas
2020-05-19 11:49         ` Sasha Levin
2020-05-24 19:17         ` Miquel Raynal
2020-05-24 19:17           ` Miquel Raynal
2020-05-24 19:17           ` Miquel Raynal
2020-05-12  7:57       ` [PATCH v4 2/2] mtd: rawnand: brcmnand: improve " Álvaro Fernández Rojas
2020-05-12  7:57         ` Álvaro Fernández Rojas
2020-05-12  7:57         ` Álvaro Fernández Rojas
2020-05-24 19:17         ` Miquel Raynal
2020-05-24 19:17           ` Miquel Raynal
2020-05-24 19:17           ` Miquel Raynal

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