From: harishkumar <harishkumar@novatium.com>
To: linux-mtd@lists.infradead.org
Subject: Problem in Erase/Writing the flash device
Date: Thu, 12 Oct 2006 14:39:40 +0530 [thread overview]
Message-ID: <1160644180.11204.18.camel@thick.localnova.com> (raw)
Hi,
I am new to flash devices. I am writing AM29LV256MH 16MB flash map
driver using MTD for my ARM board.
I used jedec_probe. The flash is 16 bit.
I mapped my partitions for the flash.
Iam using 2.6.15 kernel.
When the kernel loads, it succesfully detects the flash.
i gave starting address as 0x02000000 & length as 0x01000000 & width as
2.
after booting up the kernel, cat /proc/mtd displayed the following
thing,
dev: size erasesize name
mtd0: 01000000 00010000 Entire flash
mtd1: 00050000 00010000 Bootloader
mtd2: 00200000 00010000 Kernel
mtd3: 00c00000 00010000 Filesystem
mtd4: 001b0000 00010000 Reserved
All this seems to be ok, but normal read/write/erase operation on flash
device not happening.
I tried to read from the device /dev/mtd0 & dumped into file, the file
displayed only zeros.
Normally when no contents is there, it should display only ffff's but is
strange it is displaying zeros.
Then i tried to erase the flash using mtd-utils,
i got MEMERASE: input/output error.
Somebody help me............ please............
Harish
reply other threads:[~2006-10-12 9:17 UTC|newest]
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