[coreboot] Paraflasher Project Update

Joseph Smith joe at settoplinux.org
Sat Dec 20 17:35:10 CET 2008

On Wed, 17 Dec 2008 13:25:10 -0500, Joseph Smith <joe at settoplinux.org>
> On Wed, 17 Dec 2008 16:10:14 +0100, Peter Stuge <peter at stuge.se> wrote:
>> Joseph Smith wrote:
>>> I came up with this simple ppdev driver (attached) to test LED's
>>> connected to the data lines, But if all goes well it will be a good
>>> base for a Paraflasher->flashrom driver.
>>> Comments, suggestions?
>> Looks like it should work fine, but you can bet it will be pretty
>> slow. :)
>> lmilk using direct port IO needs rougly 300 seconds to program a
>> 256kbyte chip.
> Hmm, I like the direct IO approach also, but it would be the dirty way
> a user-space driver.
> ppdev user-space driver is supposed to be the politically correct way.
> I'm stuck between a rock, can anyone else shed some light on this? Which
> way should we go on this?
What about a combonation of the two. I could use the ppdev driver to
control access to the parallel port and then just use direct IO reads and
writes (outb and inb) directly to the port. I think if that will work, it
will speed thing right up :-)
Joseph Smith

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