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<TITLE>flashrom support for AMD CS5536</TITLE>
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<P><FONT SIZE=2 FACE="Arial">Hi all,</FONT>
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<P><FONT SIZE=2 FACE="Arial">I've recently checked out and built revision 2977 of flashrom in order to apply a simple BIOS configuration change to approx 200 embedded Linux devices.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">Unfortunately although flashrom is able to read the contents of the BIOS flash, writes fail to take (verification fails).</FONT></P>
<P><FONT SIZE=2 FACE="Arial">The system basics are as follows:</FONT>
<BR> <FONT SIZE=2 FACE="Arial">IEI NanoLX Board (AMD LX800 + CS5536 + Winbond W83627EHG) </FONT><A HREF="http://www.ieiworld.com/en/product_IPC.asp?model=NANO-LX"><U><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">http://www.ieiworld.com/en/product_IPC.asp?model=NANO-LX</FONT></U></A></P>
<P> <FONT SIZE=2 FACE="Arial">Linux Kernel Version 2.6.20</FONT>
<BR> <FONT SIZE=2 FACE="Arial">Flash part identified by flashrom as Pm49FL004 at physical address 0xfff80000 (512 KB)</FONT>
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<P><FONT SIZE=2 FACE="Arial">I see from the source code that the CS5536 chipset is directly supported and that the code attempts to remove the write protection via MSR 0x1808. This all looks good and yet the writes fail to take. I assume therefore that this board is using some GPIOs to disable writes to the BIOS flash?</FONT></P>
<P><FONT SIZE=2 FACE="Arial">Does it sound likely that GPIOs are causing the write problem that I am seeing? Does anyone know how I might go about figuring out which GPIOs to look at?</FONT></P>
<P><FONT SIZE=2 FACE="Arial">Any help would be very appreciated.</FONT>
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<P><FONT SIZE=2 FACE="Arial">Best regards,</FONT>
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<P><FONT SIZE=2 FACE="Arial">Alan Alexander </FONT><A HREF="mailto:alan@icerasemi.com"><U><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">mailto:alan@icerasemi.com</FONT></U></A>
<BR><FONT SIZE=2 FACE="Arial">Icera Inc, 2520 The Quadrant, Aztec west, Bristol BS32 4AQ, UK</FONT>
<BR><FONT SIZE=2 FACE="Arial">Tel. +44 (0)1454 284805 </FONT>
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