RE: [ECOS] Flash infrastructure rework

["Doyle, Patrick" <WPD at dtccom dot com>]

Not having thought about it too much (at all), I have been planning on
writnig a CFI driver as well, based on the hacks I made to the strata driver
that I published several months ago.  I hadn't thought about making it
support both Intel and AMD algorithms, since I only have Intel-algorithm
based parts to play with.  We should coordinate, however, so we don't
duplicate work.

--wpd


> -----Original Message-----
> From: David Marqvar (DAM) [mailto:DAM@tt.dk] 
> Sent: Friday, August 06, 2004 9:45 AM
> To: Andrew Lunn
> Cc: ecos-discuss@ecos.sourceware.org
> Subject: RE: [ECOS] Flash infrastructure rework
> 
> 
> Sounds great.
> 
> I've been wanting to make a general flash driver based on CFI which
> would support the two main programming algorithm's around: Intel
> (Strata) and AMD (don't know if it's really these companies that
> invented the algorithm, anyway I think you know what I mean). 
> Is SST yet
> another programming algorithm or == ADM?
> 
> Though CFI I can read the physical layout of the flash and the
> programming algorithm to use.
> This way the flash-driver could be generel, not limited to one or more
> certian devices.
> 
> Do you see any show-stoppers for creating such driver?
> 
> /David
> 
> -----Original Message-----
> From: ecos-discuss-owner@ecos.sourceware.org
> [mailto:ecos-discuss-owner@ecos.sourceware.org] On Behalf Of 
> Andrew Lunn
> Sent: 6. august 2004 15:23
> To: eCos Disuss
> Subject: Re: [ECOS] Flash infrastructure rework
> 
> > I put the code on a branch so that a few people can test it 
> and so we 
> > get a better idea how stable the code is with hardware i don't have 
> > access to.
> 
> This is what i decided to do. In cvs there is now a branch called
> flash_v2. If you checkout/update to that branch you will get my new
> flash code. There is also new generic drivers for SST and 
> Strata. Since
> so many targets use strata i did not want to modify them all 
> to use the
> new driver. So the strata driver is a new packets along side the old
> one. For the SST driver i have modified all targets that use it. That
> was easier since only the e7t and the aim711 use this driver.
> 
> I've attached a hardware dependent driver for our platform which makes
> use of the sst and strata device. This could be used as an 
> example as to
> how to modify the hardware dependent part of a flash driver to use the
> new code.
> 
> One thing to watch out for is that the hardware dependent 
> driver has to
> go into libextras.a. If you forget this the driver will be thrown away
> at link time...
> 
> And lastly a warning to testers.... There could be bugs which destroy
> your boot loader etc. Make sure you can restore the device with jtag
> before playing with this code.
> 
>         Thanks
>                 Andrew
> 
> -- 
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> archive: http://ecos.sourceware.org/ml/ecos-discuss
> 

Patrick Doyle
DSP Design Engineer
(603) 546-2179

 

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