Intel Extended Command set in 8x mode

Intel Extended Command set in 8x mode

[David Vrabel]

Hi,

I have a board with an Intel StrataFlash 28F640 on it.  Having written a
map driver the CFI probe code detects the chip.  However it appears that
the Intel Extended Command Set code is only for chips in 16x mode not 8x
mode which this chip is in.  Is this the case?  If so how can I get it
to work?  Do I need to write a whole new thing like cfi_cmdset_0001.c
for 8x mode?

Also,  JFFS won't compile.  I'm using kernel 2.2.16 and the
put-module-symbol patch has been applied and I'm building it outside the
kernel tree.

David Vrabel



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Re: Intel Extended Command set in 8x mode

[David Woodhouse]

On Fri, 21 Jul 2000, David Vrabel wrote:

> Hi,
> 
> I have a board with an Intel StrataFlash 28F640 on it.  Having written a
> map driver the CFI probe code detects the chip.  However it appears that
> the Intel Extended Command Set code is only for chips in 16x mode not 8x
> mode which this chip is in.  Is this the case?  If so how can I get it
> to work?  Do I need to write a whole new thing like cfi_cmdset_0001.c
> for 8x mode?

You need to provide the 2_by_8 versions of the access functions. It
doesn't really need to be a separate file.

> Also,  JFFS won't compile.  I'm using kernel 2.2.16 and the
> put-module-symbol patch has been applied and I'm building it outside the
> kernel tree.

-ENOTENOUGHINFO

--
dwmw2



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Re: Intel Extended Command set in 8x mode

[David Vrabel]

David Woodhouse wrote:
> 
> On Fri, 21 Jul 2000, David Vrabel wrote:
> >
> > I have a board with an Intel StrataFlash 28F640 on it.  Having written a
> > map driver the CFI probe code detects the chip.  However it appears that
> > the Intel Extended Command Set code is only for chips in 16x mode not 8x
> > mode which this chip is in.  Is this the case?  If so how can I get it
> > to work?  Do I need to write a whole new thing like cfi_cmdset_0001.c
> > for 8x mode?
> 
> You need to provide the 2_by_8 versions of the access functions. It
> doesn't really need to be a separate file.

2_by_8?  What is the first number supposed to mean?
 
David Vrabel



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Re: Intel Extended Command set in 8x mode

[David Woodhouse]

dvrabel@arcom.co.uk said:
>  2_by_8?  What is the first number supposed to mean?

The number of chips which are interleaved together. The second number is 
obviously the width of each chip. Hopefully, the two multiplied together 
match the bus_width parameter of the 'map'.

--
dwmw2




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