[U-Boot-Users] Intel Strataflash in 8-bit mode

[U-Boot-Users] Intel Strataflash in 8-bit mode

[Rune Raknerud]

Hi

I am porting the board/ppmc8260/strataflash.c to my custom board, which is based on a MPC8245 with Intel 28F640J3A in 8-bit mode. The 28F640J3A can be configured as 8 bit or 16 bit wide.  flash_detect_cfi() returns 16 bit portwidth (FLASH_CFI_16BIT) and 8 bit chipwidth (FLASH_CFI_BY8), while my configuration is 8 bit portwidth and 8 bit chipwidth (BYTE# pin is tied low => the device is in 8 bit mode). The 28F640J3A does not use A0 when reading identifier codes, so using  16 bit portwidth returns the correct results from the query structure. But using 16 bit portwidth in write_buff(), the result is that my data is written to just word aligned addresses. My quick and dirty fix is to set portwidth to 8 bit when entering write_buff() and restoring portwidth to 16 bit when leaving write_buff(). Also the flash_get_size() reports twice as much flash memory. Is there a way to detect if the device is in 8 or 16 bit mode? Has anyone used this device in 8 bit mode and already solved the problems that I experience?

Regards
Rune Raknerud
Cargoscan AS

[U-Boot-Users] Intel Strataflash in 8-bit mode

[Wolfgang Denk]

In message <83C81A3C5FC2454CB3A5FBACC527D083058030@server2.cargoscan.com> you wrote:
> 
> I am porting the board/ppmc8260/strataflash.c to my custom board, which
> is based on a MPC8245 with Intel 28F640J3A in 8-bit mode. The 28F640J3A
> can be configured as 8 bit or 16 bit wide.  flash_detect_cfi() returns
> 16 bit portwidth (FLASH_CFI_16BIT) and 8 bit chipwidth (FLASH_CFI_BY8),
...
> mode? Has anyone used this device in 8 bit mode and already solved the
> problems that I experience?

You may notice that there are three (3 !!!) other implementations  of
the very same driver in the U-Boot source tree:

	board/esd/cpci440/strataflash.c
	board/esd/pmc405/strataflash.c
	board/ppmc8260/strataflash.c
	board/zpc1900/flash.c

Maybe we should make an attempt and clean up this mess a bit?

Stefan, two of these files are in  your  realm  -  do  you  have  any
resources available to take the lead?

Best regards,

Wolfgang Denk

-- 
See us @ Embedded World, Nuremberg, Feb 17 - 19,  Hall 12.0 Booth 440
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
Military secrets are the most fleeting of all.
	-- Spock, "The Enterprise Incident", stardate 5027.4

[U-Boot-Users] Intel Strataflash in 8-bit mode

[Stefan Roese]

> You may notice that there are three (3 !!!) other
> implementations  of the very same driver in the U-Boot source tree:
> 
> 	board/esd/cpci440/strataflash.c
> 	board/esd/pmc405/strataflash.c
> 	board/ppmc8260/strataflash.c
> 	board/zpc1900/flash.c
> 
> Maybe we should make an attempt and clean up this mess a bit?
> 
> Stefan, two of these files are in  your  realm  -  do  you
> have  any resources available to take the lead?

Sorry, no time and no hardware at the moment!

Ciao,
Stefan.

[U-Boot-Users] Intel Strataflash in 8-bit mode

[Brad Kemp]

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
> -----Original Message-----
> From: Stefan Roese [mailto:stefan.roese at esd-electronics.com] 
> Sent: Wednesday, January 14, 2004 7:28 AM
> To: '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 
> 
> 
> > You may notice that there are three (3 !!!) other
> > implementations  of the very same driver in the U-Boot source tree:
> > 
> > 	board/esd/cpci440/strataflash.c
> > 	board/esd/pmc405/strataflash.c
> > 	board/ppmc8260/strataflash.c
> > 	board/zpc1900/flash.c
> > 
> > Maybe we should make an attempt and clean up this mess a bit?
> > 
> > Stefan, two of these files are in  your  realm  -  do  you
> > have  any resources available to take the lead?
> 
> Sorry, no time and no hardware at the moment!
> 
> Ciao,
> Stefan.
> 
> 
> 
> -------------------------------------------------------
> This SF.net email is sponsored by: Perforce Software.
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[U-Boot-Users] Intel Strataflash in 8-bit mode

[Wolfgang Denk]

Dear Brad,

in message <CFE1C3BDE1264C4D9E569E89B3AF8FA86C523E@grubber.seranoa.com> you wrote:
> All the drivers are derived from my original strataflash driver.
...
> 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.

Thanks for volunteering.
> 
> 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? 

I don't have any systems here in 8 bit mode, sorry.

Best regards,

Wolfgang Denk

-- 
See us @ Embedded World, Nuremberg, Feb 17 - 19,  Hall 12.0 Booth 440
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
Intel told us the Pentium would have "RISK" features...

[U-Boot-Users] Intel Strataflash in 8-bit mode

[listmember at orkun.us]

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

[U-Boot-Users] Intel Strataflash in 8-bit mode

[Brad Kemp]

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
> 
> 

[U-Boot-Users] Intel Strataflash in 8-bit mode

[listmember at orkun.us]

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,
Tolunay

> 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

[U-Boot-Users] Intel Strataflash in 8-bit mode

[nyet at mrv.com]

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,
> Tolunay
> 
> > 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
> 
> 
> 
> -------------------------------------------------------
> This SF.net email is sponsored by: Perforce Software.
> Perforce is the Fast Software Configuration Management System offering
> advanced branching capabilities and atomic changes on 50+ platforms.
> Free Eval! http://www.perforce.com/perforce/loadprog.html
> _______________________________________________
> U-Boot-Users mailing list
> U-Boot-Users at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/u-boot-users

-- 
Nye Liu
nliu at mrv.com
(818) 772-6235x248
(818) 772-0576 fax

"Who would be stupid enough to quote a fictitious character?"
	-- Don Quixote
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[U-Boot-Users] Intel Strataflash in 8-bit mode

[Brad Kemp]

Attached is the strataflash driver I am currently using.
I just added a bug fix from Derek Jones to handle the erase regions on
Boot Block flash.
With the 28Fxx0C3 Intel chips, there are two erase regions which are not
the same size. 
Strataflash chips have only one erase region.
I am going to merge this driver with the drivers Wolfgang already
mentioned.
This is for reference only, The final patch will contain modifications
to all files requiring changes.
Brad
> -----Original Message-----
> From: listmember at orkun.us [mailto:listmember at orkun.us] 
> Sent: Wednesday, January 14, 2004 1:10 PM
> To: Brad Kemp
> Cc: u-boot-users at lists.sourceforge.net
> Subject: RE: [U-Boot-Users] Intel Strataflash in 8-bit mode
> 
> 
> 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,
> Tolunay
> 
> > 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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[U-Boot-Users] Intel Strataflash in 8-bit mode

[Brad Kemp]

In doing a little research for 8 bit support, I found this errata on the
Intel web site.
http://www.intel.com/design/flcomp/SPECUPDT/29813018.pdf
Of particular note is #18

18. Byte Mode (x8) Functionality
Problem: Reads from the array in Byte-mode do not return the correct
data.
Implication: Customers should not attempt to operate the device in the
x8 configuration as incorrect data will be
read from the array.
Workaround: There is no known workaround for this issue.
Status: Fixed on 128 Mbit A-5 stepping.

Can someone with 8bit hardware explain this failure? 
Does this means the Byte Mode reads fail and Word Mode read succeed in
x8 configureations?
Brad Kemp

[U-Boot-Users] Intel Strataflash in 8-bit mode

[Wolfgang Denk]

In message <CFE1C3BDE1264C4D9E569E89B3AF8FA86C5244@grubber.seranoa.com> you wrote:
> 
> Attached is the strataflash driver I am currently using.
...
> This is for reference only, The final patch will contain modifications
> to all files requiring changes.


Friends, please STOP posting arbitrary  versions  of  selected  files
without  context to the list. "This is what I am using" is useless to
anybody without information for which  hardware  it  is  and  how  it
differs from the CVS code or what needs to be adapted to make it work
for other boards.

Please stick to the rules: if you can  make  a  contribution,  please
submit a PATCH. See the README for more information.

Thanks.

Best regards,

Wolfgang Denk

-- 
See us @ Embedded World, Nuremberg, Feb 17 - 19,  Hall 12.0 Booth 440
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
"More software projects have gone awry for lack of calendar time than
for all other causes combined."
                         - Fred Brooks, Jr., _The Mythical Man Month_

[U-Boot-Users] Intel Strataflash in 8-bit mode

[Sam Song]

Hi,

You wrote:
> 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.

> Is anyone willing and able to work with me?

There happens to 4 28F128J3A[C]s in 4x8 mode on my
custom board.But I haven't ported u-boot successfully
for hang after code relocation.I used flash driver
from lwmon board created by Wolfgang.So I don't know
whether I am able to work with you to test the patch
on my custom board.At least,I am willing to do
this.Perhaps,my problem has sth to do with it.

BTW,pls send a reference copy to me for I cannot get
it from U-BOOT digist.

Best regards,

Sam



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[U-Boot-Users] Intel Strataflash in 8-bit mode

[Rune Raknerud]

Brad Kemp wrote:
> 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
As mentioned in the orginal post, I have a system based on MPC8245 that uses Intel 28F640J3A in 8-bit mode. I am willing to assist with debugging and testing.

Rune Raknerud