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Date: Thu, 15 Jan 2009 21:19:37 +0530
From: "Sai Amruta" <amrutasai.p@gmail.com>
To: linuxppc-dev@ozlabs.org
Subject: MPC8313 NAND driver limitation
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Hi,

System details:
Linux: 2.6.26-1
Processor: MPC8313

The current freescale NAND controller driver is using "command completion
(CC)" interrupt from FCM block to know the completion read and write
operations. After issuing NAND read/write operation and before FCM CC
interrupt, access to other Local Bus chip selects will failed. I have found
that it was a limitation with freescale FCM block.
To come across this limitation, i have implemented busy wait loop in driver.

I have spent lot of effort to find root cause, so that i would like to
publish my observations here which may help somebody who is using MPC8313.
-- 
--Amru

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Hi,<br><br>System details:<br>Linux: 2.6.26-1<br>Processor: MPC8313<br clear="all"><br>The
current freescale NAND controller driver is using &quot;command completion
(CC)&quot; interrupt from FCM block to know the completion read and write
operations. After issuing NAND read/write operation and before FCM CC
interrupt, access to other Local Bus chip selects will failed. I have
found that it was a limitation with freescale FCM block.<br>
To come across this limitation, i have implemented busy wait loop in driver.<br><br>I
have spent lot of effort to find root cause, so that i would like to
publish my observations here which may help somebody who is using
MPC8313.<br>-- <br>--Amru<br>

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