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authorMasahiro Yamada <yamada.m@jp.panasonic.com>2014-11-13 20:31:51 +0900
committerScott Wood <scottwood@freescale.com>2014-11-26 19:53:22 -0600
commitf09eb52b3ffcc63b5bdaa5ca33f130491201f571 (patch)
treef3fcc47270b35ed6e23426c8542c950a3fb01ddb
parent65e4145a2093e6f80f19018f10a416bd02d0e816 (diff)
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mtd: denali: set some registers after nand_scan_ident()
Some but not all of implementations of the Denali NAND controller have hardware circuits to detect the device parameters such as page_size, erase_size, etc. Even on those SoCs with such hardware supported, the hardware is known to detect wrong parameters for some nasty (almost buggy) NAND devices. The device parameters detected during nand_scan_ident() are more trustworthy. This commit sets some hardware registers to mtd->pagesize, mtd->oobsize, etc. in the code between nand_scan_ident() and nand_scan_tail(). Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Cc: Scott Wood <scottwood@freescale.com> Cc: Chin Liang See <clsee@altera.com>
-rw-r--r--drivers/mtd/nand/denali.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c
index 24bc0ab..9e0429a 100644
--- a/drivers/mtd/nand/denali.c
+++ b/drivers/mtd/nand/denali.c
@@ -1209,6 +1209,17 @@ static int denali_init(struct denali_nand_info *denali)
nand_oob.eccbytes = denali->nand.ecc.bytes;
denali->nand.ecc.layout = &nand_oob;
+ writel(denali->mtd->erasesize / denali->mtd->writesize,
+ denali->flash_reg + PAGES_PER_BLOCK);
+ writel(denali->nand.options & NAND_BUSWIDTH_16 ? 1 : 0,
+ denali->flash_reg + DEVICE_WIDTH);
+ writel(denali->mtd->writesize,
+ denali->flash_reg + DEVICE_MAIN_AREA_SIZE);
+ writel(denali->mtd->oobsize,
+ denali->flash_reg + DEVICE_SPARE_AREA_SIZE);
+ if (readl(denali->flash_reg + DEVICES_CONNECTED) == 0)
+ writel(1, denali->flash_reg + DEVICES_CONNECTED);
+
/* override the default operations */
denali->nand.ecc.read_page = denali_read_page;
denali->nand.ecc.read_page_raw = denali_read_page_raw;