Commit be8f78b8 authored Sep 30, 2008 by Haavard Skinnemoen Committed by David Woodhouse Oct 18, 2008

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This chip is obsolete, but it's used in some existing designs.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

parent aaf7ea20

drivers/mtd/chips/cfi_cmdset_0002.c

+12 −4

Original line number	Diff line number	Diff line
		@@ -213,10 +213,18 @@ static void fixup_convert_atmel_pri(struct mtd_info mtd, void param)
		if (atmel_pri.Features & 0x02)
		extp->EraseSuspend = 2;

		/* 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;