Identifying Primecells

[Vitaly Wool]

Hi,

On Fri, Sep 23, 2011 at 9:11 PM, jonsmirl at gmail.com <jonsmirl at gmail.com> wrote:
> On Fri, Sep 23, 2011 at 10:22 AM, Pawel Moll <pawel.moll at arm.com> wrote:
>>> My registers don't seem to match up with the pl011 documentation...
>> <...>
>>> INTCE W       0xFD8   Interrupt       Clear Enable Register
>>> INTSE W       0xFDC   Interrupt       Set Enable Register
>>> INTS  R       0xFE0   Interrupt       Status Register
>>> INTE  R       0xFE4   Interrupt       Enable Register
>>
>> ... nor any other PrimeCell, actually :-)
>>
>> "Compliant" PrimeCells must have the PCellID in the last 4 registers:
>
> I scanned though 0xff0/f for all of the devices. The only one that had
> anything that makes sense is the Multiport Memory Controller -
> 0xb105f00d
>
> So it looks like NXP made almost all of their own peripherals. Which
> means I have to clean up the drivers for all of them.
>

I have a vague recollection that some time ago NXP was using UARTs
that were basically 8250-compatible but with some twist. You may also
want to check the pnx8xxx_uart implementation for another type of
UARTs NXP used to have on their MIPS boards.

~Vitaly