* What happened to 64-bit support?
@ 2002-07-26 5:22 Allen Curtis
2002-07-30 22:35 ` David Woodhouse
0 siblings, 1 reply; 6+ messages in thread
From: Allen Curtis @ 2002-07-26 5:22 UTC (permalink / raw)
To: linux-mtd
I have had a chance to continue working on my Read-Only problem and have
discovered that the flash is getting mounted as if it was ROM. Our system is
configured with 4-16bit Strata flash devices and should be using the CFI
interface. It appears that the flash is being recognized as CFI compliant
bus fails the buswidth test.
Using the latest CVS code I recompiled with DEBUG, genprobe...() reports
that it does not support buswidth of 8. jedec_probe...() did not work. It
did appear to work with the ROM mapped to RAM option but this also the
reason that it is always mounted Read-Only.
I retrieved linux-2_4-branch from CVS, it appears that this does not have
64-bit bus support either. Looking at cfi_probe(), the case statement does
not support buswidth of 8.
Where can I find the 64-bit patches?
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: What happened to 64-bit support?
2002-07-26 5:22 What happened to 64-bit support? Allen Curtis
@ 2002-07-30 22:35 ` David Woodhouse
2002-07-31 3:35 ` acurtis
0 siblings, 1 reply; 6+ messages in thread
From: David Woodhouse @ 2002-07-30 22:35 UTC (permalink / raw)
To: acurtis; +Cc: linux-mtd
Sorry, I missed this mail so my reply to your latest mail probably wasn't
too helpful.
acurtis@onz.com said:
> Using the latest CVS code I recompiled with DEBUG, genprobe...()
> reports that it does not support buswidth of 8. jedec_probe...() did
> not work. It did appear to work with the ROM mapped to RAM option but
> this also the reason that it is always mounted Read-Only.
Did you actually enable 64-bit support? It's not on by default because it
slows things down.
CONFIG_MTD_ADV_OPTIONS=y, CONFIG_MTD_CFI_GEOMETRY=y,
CONFIG_MTD_CFI_B8=y, CONFIG_MTD_CFI_I4=y.
--
dwmw2
^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: What happened to 64-bit support?
2002-07-30 22:35 ` David Woodhouse
@ 2002-07-31 3:35 ` acurtis
2002-07-31 8:19 ` David Woodhouse
0 siblings, 1 reply; 6+ messages in thread
From: acurtis @ 2002-07-31 3:35 UTC (permalink / raw)
To: David Woodhouse; +Cc: linux-mtd
> Did you actually enable 64-bit support? It's not on by default because it
> slows things down.
>
> CONFIG_MTD_ADV_OPTIONS=y, CONFIG_MTD_CFI_GEOMETRY=y,
> CONFIG_MTD_CFI_B8=y, CONFIG_MTD_CFI_I4=y.
In theory yes. if CONFIG_MTD_CFI_B8 translates to 64-bits in config (which I
believe it does, then yes) As I mentioned, the problem appears to be in the
probe routines not liking an octet of 8.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: What happened to 64-bit support?
2002-07-31 3:35 ` acurtis
@ 2002-07-31 8:19 ` David Woodhouse
2002-07-31 13:56 ` acurtis
0 siblings, 1 reply; 6+ messages in thread
From: David Woodhouse @ 2002-07-31 8:19 UTC (permalink / raw)
To: acurtis; +Cc: linux-mtd
acurtis@directvinternet.com said:
> In theory yes. if CONFIG_MTD_CFI_B8 translates to 64-bits in config
> (which I believe it does, then yes) As I mentioned, the problem
> appears to be in the probe routines not liking an octet of 8.
What exactly happens?
--
dwmw2
^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: What happened to 64-bit support?
2002-07-31 8:19 ` David Woodhouse
@ 2002-07-31 13:56 ` acurtis
2002-07-31 14:01 ` David Woodhouse
0 siblings, 1 reply; 6+ messages in thread
From: acurtis @ 2002-07-31 13:56 UTC (permalink / raw)
To: David Woodhouse, acurtis; +Cc: linux-mtd
> > In theory yes. if CONFIG_MTD_CFI_B8 translates to 64-bits in config
> > (which I believe it does, then yes) As I mentioned, the problem
> > appears to be in the probe routines not liking an octet of 8.
>
> What exactly happens?
cfi_probe() terminates with an unsupported buswidth. The devices do get
mounted as ROM but then they are read-only.
Sequence:
cfi - unsupported buswidth
jedec - fails
ROM - mapped but read-only
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2002-07-31 14:01 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2002-07-26 5:22 What happened to 64-bit support? Allen Curtis
2002-07-30 22:35 ` David Woodhouse
2002-07-31 3:35 ` acurtis
2002-07-31 8:19 ` David Woodhouse
2002-07-31 13:56 ` acurtis
2002-07-31 14:01 ` David Woodhouse
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