[U-Boot-Users] Intel Strataflash in 8-bit mode
nyet at mrv.com
nyet at mrv.com
Wed Jan 14 19:38:20 CET 2004
enclosed is one from my fads based board; it supports 1x8, 2x8, 4x8,
1x16 and 2x16 (but 4x8 and 2x8 are untested)
i know this isn't a real patch, just an example of what we do here.
On Wed, Jan 14, 2004 at 12:09:57PM -0600, listmember at orkun.us wrote:
> Hmm, interesting. I used one of the strataflash.c from one of the boards.
> I do not know which one right now. It did not seem to identify the flash
> properly. When it did not work and I took another flash.c that uses BCS,
> tweaked it and added flash_real_protect support myself.
> I would prefer using CFI driver since it also does buffered flash writes
> and if manufacturer changes the flash chips in some revision it would
> most likely not break board support.
> Which one do you recommend me to try? This is another reason why CFI
> drivers should be unified. When I worked with one I tought they were
> probably copies of the same source.
> Best regards,
> > That seems odd since I have it running on 2x16 in parallel and 2x16 in
> > serial here.
> > How did it fail in your setup?
> >> -----Original Message-----
> >> From: listmember at orkun.us [mailto:listmember at orkun.us]
> >> Sent: Wednesday, January 14, 2004 11:40 AM
> >> To: Brad Kemp
> >> Cc: Stefan Roese; Wolfgang Denk; rune.raknerud at cargoscan.com;
> >> u-boot-users at lists.sourceforge.net
> >> Subject: RE: [U-Boot-Users] Intel Strataflash in 8-bit mode
> >> Brad,
> >> Unfortunately, I don't have 8 bit strataflash. I can't help there.
> >> I looked at your driver for Cogent CSB272 board intially but
> >> it does not
> >> seem to support 2x 16-bit strataflash on a 32bit bus either.
> >> I can help you with the driver to add such support as well. I agree a
> >> unified flash driver that is capable of handling various bus and port
> >> widths is probably a good thing. Few boards if any have odd ball
> >> configurations that need a custom driver. Most newer flash are CFI
> >> compliant.
> >> Regards,
> >> Tolunay
> >> > All the drivers are derived from my original strataflash driver.
> >> > There is a problem with 8bit wide detection in the flash_cfi_detect
> >> > routine.
> >> > The work around is to hardcode the port width after
> >> flash_cfi_detect is
> >> > called. I believe I understand the problem, but
> >> > I have no access to 8bit hardware.
> >> > If some one is willing to help debug the problem with 8 bit wide
> >> > protection, I will take on fixing the strataflash driver
> >> and moving it
> >> > to the drivers directory.
> >> > This driver does include support for 64 bit wide flash and
> >> access to the
> >> > write once areas.
> >> > Is anyone willing and able to work with me?
> >> > Brad
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