[U-Boot] [PATCH v2 2/2] mtd: denali: set some registers after nand_scan_ident()
Masahiro Yamada
yamada.m at jp.panasonic.com
Thu Nov 13 12:31:51 CET 2014
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 at jp.panasonic.com>
Cc: Scott Wood <scottwood at freescale.com>
Cc: Chin Liang See <clsee at altera.com>
---
Changes in v2: None
drivers/mtd/nand/denali.c | 11 +++++++++++
1 file changed, 11 insertions(+)
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;
--
1.9.1
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