From: "Chuanxiao.Dong" <chuanxiao.dong@intel.com>
To: linux-mtd@lists.infradead.org, dedekind1@gmail.com, dwmw2@infradead.org
Subject: [PATCH v1 4/4]mtd: denali: Add multi connected NAND support
Date: Fri, 6 Aug 2010 18:50:03 +0800 [thread overview]
Message-ID: <20100806105003.GD7326@intel.com> (raw)
From 2d0afaca42e1a861480c6bd7966b8ec24e7e1851 Mon Sep 17 00:00:00 2001
From: Chuanxiao Dong <chuanxiao.dong@intel.com>
Date: Fri, 6 Aug 2010 18:19:09 +0800
Subject: [PATCH 4/4] mtd: denali: Add multi connected NAND support
Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com>
---
drivers/mtd/nand/denali.c | 22 +++++++++++++++++++++-
drivers/mtd/nand/denali.h | 1 +
2 files changed, 22 insertions(+), 1 deletions(-)
diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c
index d486c0e..ba7e620 100644
--- a/drivers/mtd/nand/denali.c
+++ b/drivers/mtd/nand/denali.c
@@ -1676,6 +1676,25 @@ static int denali_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
goto failed_nand;
}
+ /* support for multi nand
+ * MTD known nothing about multi nand,
+ * so we should tell it the real pagesize
+ * and anything necessery
+ */
+ denali->devnum = ioread32(denali->flash_reg + DEVICES_CONNECTED);
+ denali->nand.chipsize <<= (denali->devnum - 1);
+ denali->nand.page_shift += (denali->devnum - 1);
+ denali->nand.pagemask = (denali->nand.chipsize >>
+ denali->nand.page_shift) - 1;
+ denali->nand.bbt_erase_shift += (denali->devnum - 1);
+ denali->nand.phys_erase_shift = denali->nand.bbt_erase_shift;
+ denali->nand.chip_shift += (denali->devnum - 1);
+ denali->mtd.writesize <<= (denali->devnum - 1);
+ denali->mtd.oobsize <<= (denali->devnum - 1);
+ denali->mtd.erasesize <<= (denali->devnum - 1);
+ denali->mtd.size = denali->nand.numchips * denali->nand.chipsize;
+ denali->bbtskipbytes *= denali->devnum;
+
/* second stage of the NAND scan
* this stage requires information regarding ECC and
* bad block management. */
@@ -1712,6 +1731,7 @@ static int denali_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
denali_write32(8, denali->flash_reg + ECC_CORRECTION);
}
+ denali->nand.ecc.bytes *= denali->devnum;
denali->nand.ecc.layout->eccbytes *=
denali->mtd.writesize / ECC_SECTOR_SIZE;
denali->nand.ecc.layout->oobfree[0].offset =
@@ -1737,7 +1757,7 @@ static int denali_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
denali->nand.ecc.hwctl = denali_ecc_hwctl;
/* override the default read operations */
- denali->nand.ecc.size = denali->mtd.writesize;
+ denali->nand.ecc.size = ECC_SECTOR_SIZE * denali->devnum;
denali->nand.ecc.read_page = denali_read_page;
denali->nand.ecc.read_page_raw = denali_read_page_raw;
denali->nand.ecc.write_page = denali_write_page;
diff --git a/drivers/mtd/nand/denali.h b/drivers/mtd/nand/denali.h
index bdf5c2a..b680474 100644
--- a/drivers/mtd/nand/denali.h
+++ b/drivers/mtd/nand/denali.h
@@ -764,6 +764,7 @@ struct denali_nand_info {
int irq_debug_array[32];
int idx;
+ uint32_t devnum; /* represent how many nands connected */
uint32_t fwblks; /* represent how many blocks FW used */
uint32_t totalblks;
uint32_t blksperchip;
--
1.6.6.1
reply other threads:[~2010-08-06 10:52 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20100806105003.GD7326@intel.com \
--to=chuanxiao.dong@intel.com \
--cc=dedekind1@gmail.com \
--cc=dwmw2@infradead.org \
--cc=linux-mtd@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).