[coreboot] [LinuxBIOS] W39V040BPZ or vt8237. Flashing problems.

[Carl-Daniel Hailfinger]

On 04.03.2008 04:53, Carl-Daniel Hailfinger wrote:
> On 04.03.2008 01:15, Peter Stuge wrote:
>   
>> On Mon, Mar 03, 2008 at 06:42:05PM -0500, Corey Osgood wrote:
>>   
>>     
>>>> If I hot-unplug the flash chip and hot-replug it, it is recognized
>>>> again. Reading it shows the erase was successful, but once I try
>>>> to program even one byte, communication with the flash chip fails
>>>> completely and I have to unplug and replug to fix that.
>>>>       
>>>>         
>>> I'm seeing exactly the same thing with the cn700+vt8237r on Jetway
>>> J7F2W, same flash chip, except that where it hangs seems random.
>>>     
>>>       
>> I take this to mean that 8237 and the W39V040BPZ aren't really
>> compatible.
>>
>> I would investigate if the timing for the two is compatible on paper.
>> Also, maybe the 8237 has some speed setting like the ITE.  
>>     
>
> The interesting thing is that the chip is the factory installed chip and 
> flashing it should (not yet tested) work fine with the vendor flash tool.
>   

Yes, the 8237 has some LPC timing settings which could help here. See 
the data shett for details.

Regards,
Carl-Daniel

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