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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2010-05-28 10:02:17 +0200 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2010-08-02 09:01:18 +0100 |
| commit | 6c49939869c20550512386610ece45aceb65e7f4 (patch) | |
| tree | 0a7bec28e08a8da92121363840b673b93d31ba92 /drivers/mtd/nand/mxc_nand.c | |
| parent | a4b81ca50974051195b11ca173da073b961f94d5 (diff) | |
| download | kernel_samsung_smdk4412-6c49939869c20550512386610ece45aceb65e7f4.zip kernel_samsung_smdk4412-6c49939869c20550512386610ece45aceb65e7f4.tar.gz kernel_samsung_smdk4412-6c49939869c20550512386610ece45aceb65e7f4.tar.bz2 | |
mtd: mxc_nand: fix OOB accesses on i.MX27
The OOB handling in the mxc_nand driver is broken for v1 type
controllers (i.MX27/31) with 512 byte page size. This perhaps
did not show up because ubi does not use OOB.
Update the driver to always read/write a whole page even if
only OOB is requested. With this patch the driver passes the
mtd_oobtest on i.MX27 with 512 byte page size. Also tested
with 2048 byte page size and on i.MX35 (v2 type controller)
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/nand/mxc_nand.c')
| -rw-r--r-- | drivers/mtd/nand/mxc_nand.c | 31 |
1 files changed, 5 insertions, 26 deletions
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c index 82e9438..6e8aa34 100644 --- a/drivers/mtd/nand/mxc_nand.c +++ b/drivers/mtd/nand/mxc_nand.c @@ -623,8 +623,7 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command, else host->buf_start = column + mtd->writesize; - if (mtd->writesize > 512) - command = NAND_CMD_READ0; /* only READ0 is valid */ + command = NAND_CMD_READ0; /* only READ0 is valid */ send_cmd(host, command, false); mxc_do_addr_cycle(mtd, column, page_addr); @@ -639,31 +638,11 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command, break; case NAND_CMD_SEQIN: - if (column >= mtd->writesize) { - /* - * FIXME: before send SEQIN command for write OOB, - * We must read one page out. - * For K9F1GXX has no READ1 command to set current HW - * pointer to spare area, we must write the whole page - * including OOB together. - */ - if (mtd->writesize > 512) - /* call ourself to read a page */ - mxc_nand_command(mtd, NAND_CMD_READ0, 0, - page_addr); - - host->buf_start = column; - - /* Set program pointer to spare region */ - if (mtd->writesize == 512) - send_cmd(host, NAND_CMD_READOOB, false); - } else { - host->buf_start = column; + if (column >= mtd->writesize) + /* call ourself to read a page */ + mxc_nand_command(mtd, NAND_CMD_READ0, 0, page_addr); - /* Set program pointer to page start */ - if (mtd->writesize == 512) - send_cmd(host, NAND_CMD_READ0, false); - } + host->buf_start = column; send_cmd(host, command, false); mxc_do_addr_cycle(mtd, column, page_addr); |