From be8f78b8e8b5bcafc19ac85b815e98049aa86314 Mon Sep 17 00:00:00 2001 From: Haavard Skinnemoen Date: Tue, 30 Sep 2008 13:55:33 +0200 Subject: [MTD] [NOR] AT49BV6416 has swapped erase regions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 This chip is obsolete, but it's used in some existing designs.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 Signed-off-by: David Woodhouse --- drivers/mtd/chips/cfi_cmdset_0002.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) (limited to 'drivers/mtd/chips/cfi_cmdset_0002.c') diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c index db16b7b0723f..3e6f5d8609e8 100644 --- a/drivers/mtd/chips/cfi_cmdset_0002.c +++ b/drivers/mtd/chips/cfi_cmdset_0002.c @@ -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; -- cgit v1.2.1