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[MTD] [NOR] AT49BV6416 has swapped erase regions 

The CFI information read from AT49BV6416 lists the erase regions in the
wrong order, causing problems when trying to erase or update the first
or last 64KiB block.

Work around this by inverting the "top boot" flag, which will
effectively reverse the order of the erase regions.

This chip is obsolete, but it's used in some existing designs.

Signed-off-by: Håvard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Haavard Skinnemoen 2008-09-30 13:55:33 +02:00 committed by David Woodhouse
parent aaf7ea2000
commit be8f78b8e8
1 changed files with 12 additions and 4 deletions
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16
drivers/mtd/chips/cfi_cmdset_0002.c
View File

@ -213,10 +213,18 @@ static void fixup_convert_atmel_pri(struct mtd_info *mtd, void *param)
if (atmel_pri.Features & 0x02)
extp->EraseSuspend = 2;
if (atmel_pri.BottomBoot)
extp->TopBottom = 2;
else
extp->TopBottom = 3;
/* Some chips got it backwards... */
if (cfi->id == AT49BV6416) {
if (atmel_pri.BottomBoot)
extp->TopBottom = 3;
else
extp->TopBottom = 2;
} else {
if (atmel_pri.BottomBoot)
extp->TopBottom = 2;
else
extp->TopBottom = 3;
}
/* burst write mode not supported */
cfi->cfiq->BufWriteTimeoutTyp = 0;