MVME 5100 flash programming

MVME 5100 flash programming

[Rick Hunnicutt]

Hello all,

I have a 5100 running the 2.4.2 kernel and want to use the onboard flash.
With PPC_Bug, we are able to program the 16M area with a kernel and RAM disk
image and boot. At the very least, I'd like to use some of the remaining
flash area as a read/write area for configuration data. Ideally, I'd like
the whole flash area to be a JFFS file system using MTD and the CFI
interface.

Problem is, I am unable to get the flash to respond to any type of query.
The MTD code fails to get a response to the CFI query. Other code that tries
to perform a simple query of the chips Manufacture ID fails as well. I can
read the data in the flash that was written by pflash but can't seem to get
writes to occur.

Anyone using the flash on a 5100 at all? Any ideas, code samples, help at
all would be appreciated!

Thanks,
Rick


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Re: MVME 5100 flash programming

[Paul Nicholson]

I don't know what a 5100 is or how the FLASH chip select is generated. Embedded chip select logic usually has a write enable bit. I would suggest that you verify that you can generate a chip select for a write operation.

Paul

At 12:35 PM -0800 12/19/01, Rick Hunnicutt wrote:
>Hello all,
>
>I have a 5100 running the 2.4.2 kernel and want to use the onboard flash.
>With PPC_Bug, we are able to program the 16M area with a kernel and RAM disk
>image and boot. At the very least, I'd like to use some of the remaining
>flash area as a read/write area for configuration data. Ideally, I'd like
>the whole flash area to be a JFFS file system using MTD and the CFI
>interface.
>
>Problem is, I am unable to get the flash to respond to any type of query.
>The MTD code fails to get a response to the CFI query. Other code that tries
>to perform a simple query of the chips Manufacture ID fails as well. I can
>read the data in the flash that was written by pflash but can't seem to get
>writes to occur.
>
>Anyone using the flash on a 5100 at all? Any ideas, code samples, help at
>all would be appreciated!
>
>Thanks,
>Rick
>
>


** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/