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Message-Id: <1398938214-17847-36-git-send-email-lee.jones@linaro.org>
Date: Thu, 1 May 2014 10:56:42 +0100
From: Lee Jones <lee.jones@...aro.org>
To: linux-kernel@...r.kernel.org
Cc: computersforpeace@...il.com, linux-mtd@...ts.infradead.org,
kernel@...inux.com, Lee Jones <lee.jones@...aro.org>
Subject: [PATCH 35/47] mtd: nand: stm_nand_bch: scan for BBMs and build memory-resident BBT
If at start-up time we can't find our own pre-built memory-resident BBT
(e.g. at first run) this routine will search for factory set BBMs and
duplicate them into our own BBT for local consumption.
Signed-off-by: Lee Jones <lee.jones@...aro.org>
---
drivers/mtd/nand/stm_nand_bch.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/drivers/mtd/nand/stm_nand_bch.c b/drivers/mtd/nand/stm_nand_bch.c
index 7d242ad..1569738 100644
--- a/drivers/mtd/nand/stm_nand_bch.c
+++ b/drivers/mtd/nand/stm_nand_bch.c
@@ -878,6 +878,33 @@ static int nandi_scan_bad_block_markers_block(struct nandi_controller *nandi,
return 0;
}
+/* Scan for BBMs and build memory-resident BBT */
+static int nandi_scan_build_bbt(struct nandi_controller *nandi,
+ struct nandi_bbt_info *bbt_info)
+{
+ struct mtd_info *mtd = &nandi->info.mtd;
+ struct nand_chip *chip = mtd->priv;
+ uint32_t page_size = mtd->writesize;
+ uint8_t *bbt = bbt_info->bbt;
+ uint32_t block;
+
+ dev_dbg(nandi->dev,
+ "scan device for bad-block markers [bbt options = 0x%02x]\n",
+ chip->bbt_options);
+
+ memset(bbt, 0xff, page_size);
+ bbt_info->bbt_vers[0] = 0;
+ bbt_info->bbt_vers[1] = 0;
+ bbt_info->bbt_block[0] = nandi->blocks_per_device - 1;
+ bbt_info->bbt_block[1] = nandi->blocks_per_device - 2;
+
+ for (block = 0; block < nandi->blocks_per_device; block++)
+ if (nandi_scan_bad_block_markers_block(nandi, block))
+ bbt_set_block_mark(bbt, block, BBT_MARK_BAD_FACTORY);
+
+ return 0;
+}
+
/* Populate IBBT BCH Header */
static void bch_fill_ibbt_header(struct nandi_controller *nandi,
struct nand_ibbt_bch_header *ibbt_header,
--
1.8.3.2
--
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