[U-Boot] [PATCH] MMC: PL180: Fix infinite loop with VExpress extended fifo implementation

[Jon Medhurst (Tixy)]

On Wed, 2011-10-05 at 10:30 +0100, Pawel Moll wrote:
> Hi Tixy,
> 
> > One possible fix is to add some build time configuration to change
> > SDI_FIFO_BURST_SIZE for the new implementation. 
> 
> You can also detect the configuration in runtime, basing on PeriphID:
> 
> http://infocenter.arm.com/help/topic/com.arm.doc.ddi0172a/i1024149.html
> 
> Configuration == 0 (ID == 0x00041180) -> FIFO length = 16 * 4
> Configuration == 1 (ID == 0x01041180) -> FIFO length = 128 * 4

That's useful to know. The PL180 code is also used for U8500, I don't
know if that implements the peripheral ID register; though I guess any
probing could be limited to vexpress anyway.

However, I think that if smaller and simpler code will work on all
hardware then that is preferable.

-- 
Tixy