From: Thomas Gleixner <tglx@linutronix.de>
To: Mikael Starvik <mikael.starvik@axis.com>
Cc: linux-mtd@lists.infradead.org
Subject: Re: NAND programming bug in Linux 2.6.8?
Date: Fri, 15 Oct 2004 13:13:10 +0200 [thread overview]
Message-ID: <1097838790.17034.63.camel@thomas> (raw)
In-Reply-To: <BFECAF9E178F144FAEF2BF4CE739C66818F58E@exmail1.se.axis.com>
On Fri, 2004-10-15 at 12:53, Mikael Starvik wrote:
> The problem is that for a 16-bit device the READ1 command will be issued
> even though the column address fits in 8 bits. Suggested patch below.
There is no problem at all.
1. As we do only full page reads, this will never happen. The READ1 code
could go away complete.
2. If you want to read the second half of the page, then it's completely
correct to issue the READ1 command, because the column address is
shifted right by 1 later. The READ1 command selects the second half of
the page whether the chip is in 8 or in 16 bit mode.
read from offset 256
command = READ1, column address = 0
it will read from offset 256
read from offset 260
command = READ1, column address = 2
it will read from offset 256 + 2*2 = 260
tglx
next prev parent reply other threads:[~2004-10-15 11:21 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-15 10:53 NAND programming bug in Linux 2.6.8? Mikael Starvik
2004-10-15 11:13 ` Thomas Gleixner [this message]
[not found] <BFECAF9E178F144FAEF2BF4CE739C668018E2C8E@exmail1.se.axis.com>
2004-10-15 11:50 ` Mikael Starvik
2004-10-15 12:05 ` Thomas Gleixner
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