From: "Álvaro Fernández Rojas" <noltari@gmail.com>
To: computersforpeace@gmail.com, kdasu.kdev@gmail.com,
miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com,
sumit.semwal@linaro.org, linux-mtd@lists.infradead.org,
bcm-kernel-feedback-list@broadcom.com,
linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org
Cc: "Álvaro Fernández Rojas" <noltari@gmail.com>
Subject: [PATCH 1/2] nand: brcmnand: improve hamming oob layout
Date: Mon, 4 May 2020 11:30:33 +0200 [thread overview]
Message-ID: <20200504093034.2739968-1-noltari@gmail.com> (raw)
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
next reply other threads:[~2020-05-04 9:30 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-04 9:30 Álvaro Fernández Rojas [this message]
2020-05-04 9:30 ` [PATCH 2/2] nand: brcmnand: fix BBI in hamming oob layout Álvaro Fernández Rojas
2020-05-04 18:59 ` [PATCH v2 1/2] nand: brcmnand: improve " Álvaro Fernández Rojas
2020-05-04 18:59 ` [PATCH v2 2/2] nand: brcmnand: fix " Álvaro Fernández Rojas
2020-05-11 16:34 ` [PATCH v2 1/2] nand: brcmnand: improve " Miquel Raynal
2020-05-12 6:00 ` [PATCH v3 0/2] mtd: rawnand: " Álvaro Fernández Rojas
2020-05-12 6:00 ` [PATCH v3 1/2] mtd: rawnand: brcmnand: fix " Álvaro Fernández Rojas
2020-05-12 6:00 ` [PATCH v3 2/2] mtd: rawnand: brcmnand: improve " Álvaro Fernández Rojas
2020-05-12 7:08 ` Miquel Raynal
2020-05-12 7:12 ` Álvaro Fernández Rojas
2020-05-12 7:19 ` Miquel Raynal
2020-05-12 7:26 ` Álvaro Fernández Rojas
2020-05-12 7:41 ` Miquel Raynal
2020-05-12 7:57 ` [PATCH v4 0/2] " Álvaro Fernández Rojas
2020-05-12 7:57 ` [PATCH v4 1/2] mtd: rawnand: brcmnand: fix " Álvaro Fernández Rojas
2020-05-24 19:17 ` Miquel Raynal
2020-05-12 7:57 ` [PATCH v4 2/2] mtd: rawnand: brcmnand: improve " Álvaro Fernández Rojas
2020-05-24 19:17 ` Miquel Raynal
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