CompactFlash on PQII Pro

CompactFlash on PQII Pro

[Ben Warren]

Hello,

I have a custom board where we've hung a CompactFlash on the local bus
of an MPC8349 processor, intending to use it in 'True IDE' mode.  The
closest thing I've found in the kernel tree is
drivers/ide/ppc/ide-m8xx.c, although it's *very* possible I'm not
looking in the right place.  

I believe my chip's local bus is similar to the 8xx, so making this
driver work with my hardware doesn't seem like that big a deal.  I fully
expect to have to monkey with UPM timings among other things.  On the
other hand, this seems like something other people would have done,
maybe with one of the other PQ families like 82xx or 85xx.

Does anyone have a patch, suggestions or flames they can throw my way?

cheers,
Ben

Re: CompactFlash on PQII Pro

[Kumar Gala]

On Aug 23, 2006, at 5:16 PM, Ben Warren wrote:

> Hello,
>
> I have a custom board where we've hung a CompactFlash on the local bus
> of an MPC8349 processor, intending to use it in 'True IDE' mode.  The
> closest thing I've found in the kernel tree is
> drivers/ide/ppc/ide-m8xx.c, although it's *very* possible I'm not
> looking in the right place.
>
> I believe my chip's local bus is similar to the 8xx, so making this
> driver work with my hardware doesn't seem like that big a deal.  I  
> fully
> expect to have to monkey with UPM timings among other things.  On the
> other hand, this seems like something other people would have done,
> maybe with one of the other PQ families like 82xx or 85xx.
>
> Does anyone have a patch, suggestions or flames they can throw my way?

I know I posted a patch for cf-ide.c to lkml some time ago, this was  
to do a CF in true ide mode using the 83xx localbus.

http://marc.theaimsgroup.com/?l=linux-kernel&m=113877891224982&w=2

We did some UPM setup in u-boot to use two CS on Localbus for this.

- kumar

Re: CompactFlash on PQII Pro

[Ben Warren]

Thanks Kumar,

As always, you're several steps ahead of me.

On Wed, 2006-08-23 at 18:04 -0500, Kumar Gala wrote:

> I know I posted a patch for cf-ide.c to lkml some time ago, this was  
> to do a CF in true ide mode using the 83xx localbus.
> 
> http://marc.theaimsgroup.com/?l=linux-kernel&m=113877891224982&w=2
> 
> We did some UPM setup in u-boot to use two CS on Localbus for this.
In our case, we only have one CS available but it's going to a CPLD that
will decode and provide two CSs to the CF.  This will work as long as
the UPM setup is identical for the two chip selects.  Should be...  
Off-topic to this list, but do you have the U-boot code that you can
share?  If not, no worries.

thanks,
Ben

Re: CompactFlash on PQII Pro

[Kumar Gala]

On Aug 24, 2006, at 9:44 AM, Ben Warren wrote:

> Thanks Kumar,
>
> As always, you're several steps ahead of me.
>
> On Wed, 2006-08-23 at 18:04 -0500, Kumar Gala wrote:
>
>> I know I posted a patch for cf-ide.c to lkml some time ago, this was
>> to do a CF in true ide mode using the 83xx localbus.
>>
>> http://marc.theaimsgroup.com/?l=linux-kernel&m=113877891224982&w=2
>>
>> We did some UPM setup in u-boot to use two CS on Localbus for this.
> In our case, we only have one CS available but it's going to a CPLD  
> that
> will decode and provide two CSs to the CF.  This will work as long as
> the UPM setup is identical for the two chip selects.  Should be...
> Off-topic to this list, but do you have the U-boot code that you can
> share?  If not, no worries.

The only code in u-boot was the UPM setup code, I'm happy to send  
that to you.

- kumar

Re: CompactFlash on PQII Pro

[Ben Warren]

Kumar,

On Thu, 2006-08-24 at 13:25 -0500, Kumar Gala wrote:

> The only code in u-boot was the UPM setup code, I'm happy to send  
> that to you.
> 
If it's no trouble, that would be great.  My HW guy is calculating the
settings, but this stuff can be frustrating to debug.  BTW - was the
system bus speed for your CPU 33 or 66 MHz?  We're targeting for a
400MHz 8349 which has a 33MHz system bus.

Re: CompactFlash on PQII Pro

[Kumar Gala]

On Aug 24, 2006, at 1:35 PM, Ben Warren wrote:

> Kumar,
>
> On Thu, 2006-08-24 at 13:25 -0500, Kumar Gala wrote:
>
>> The only code in u-boot was the UPM setup code, I'm happy to send
>> that to you.
>>
> If it's no trouble, that would be great.  My HW guy is calculating the
> settings, but this stuff can be frustrating to debug.  BTW - was the
> system bus speed for your CPU 33 or 66 MHz?  We're targeting for a
> 400MHz 8349 which has a 33MHz system bus.

I think we were running @ 66Mhz, but I've run the FSL ref board @ 33MHZ.

- k