Does MTD include support for STM M58LW064?

Does MTD include support for STM M58LW064?

[George G. Davis]

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Greetings,

I've reviewed the latest code and believe the answer is no.

But I'll ask the question anyway in case I missed it: does
MTD include support for the ST Microelectronics M58LW064
flash device? This device supports CFI commands. But
I don't see any support for it in the current MTD CVS
sources.

TIA and appologies if this has been asked already!  : )

-- 
Regards,
George

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Re: Does MTD include support for STM M58LW064?

[David Woodhouse]

davis_g@mvista.com said:
>  But I'll ask the question anyway in case I missed it: does MTD
> include support for the ST Microelectronics M58LW064 flash device?
> This device supports CFI commands. But I don't see any support for it
> in the current MTD CVS sources.

There's no such thing as 'CFI commands'. The only thing that's _common_ 
about the Common Flash Interface is the way you probe the chip to find out 
what commands it supports.

Looking at the datasheet for that chip, it seem to support command set 
number 0x20, which we don't currently have code to recognise. But at first 
glance, the command set described seems identical to the Intel chips.

Compare the commands listed in the datasheet with the ones in the Intel
datasheets, and if the latter really is a subset of the (parts we actually
use of the) former, then try hacking the CFI probe to treat cmdset 0x20 as
if it was cmdset 1, and see what happens. It'll probably work.

--
dwmw2

Re: Does MTD include support for STM M58LW064?

[George G. Davis]

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David Woodhouse wrote:
> 
> davis_g@mvista.com said:
> >  But I'll ask the question anyway in case I missed it: does MTD
> > include support for the ST Microelectronics M58LW064 flash device?
> > This device supports CFI commands. But I don't see any support for it
> > in the current MTD CVS sources.
> 
> There's no such thing as 'CFI commands'. The only thing that's _common_
> about the Common Flash Interface is the way you probe the chip to find out
> what commands it supports.

Thanks for the education. The part data sheet states "The device supports the
CFI command set definition". My apologies for the syntactical error - I'm not
an expert on the subject matter!  : )


> Looking at the datasheet for that chip, it seem to support command set
> number 0x20, which we don't currently have code to recognise. But at first
> glance, the command set described seems identical to the Intel chips.
> 
> Compare the commands listed in the datasheet with the ones in the Intel
> datasheets, and if the latter really is a subset of the (parts we actually
> use of the) former, then try hacking the CFI probe to treat cmdset 0x20 as
> if it was cmdset 1, and see what happens. It'll probably work.

Thanks. That's the impression I had - this device implements only a subset
of the Intel/Sharp command set. At the moment I'm only investigating support
for alternate sourcing of components. If we proceed with evaulating this
device, I'll follow your recommendation and let you know how it goes.

 
> --
> dwmw2

-- 
Regards,
George

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