On 03/02/2016 05:24 PM, Marek Vasut wrote:
>
> Well, that's our usual USB/QSPI cache issue that's tormenting your soul.
> CCing Chin ;-)
>
> Does the issue by any chance magically disappear if you apply this patch:
>
> diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
> index 026e7ef..06802c6 100644
> --- a/arch/arm/include/asm/system.h
> +++ b/arch/arm/include/asm/system.h
> @@ -274,7 +274,7 @@ static inline void set_dacr(unsigned int val)
>
> /* options available for data cache on each page */
> enum dcache_option {
> - DCACHE_OFF = TTB_SECT_DOMAIN(0) | TTB_SECT_XN_MASK | TTB_SECT,
> + DCACHE_OFF = TTB_SECT_S_MASK | TTB_SECT_DOMAIN(0) |
> TTB_SECT_XN_MASK | TTB_SECT,
> DCACHE_WRITETHROUGH = DCACHE_OFF | TTB_SECT_C_MASK,
> DCACHE_WRITEBACK = DCACHE_WRITETHROUGH | TTB_SECT_B_MASK,
> DCACHE_WRITEALLOC = DCACHE_WRITEBACK | TTB_SECT_TEX(1),
>
I'm away from my office today and don't have access to the sockit. I can
test this tomorrow.
But what's interesting is that I have the DE0-NANO-SOCKIT board at home,
and USB seems to be working fine with dcache on.
Dinh
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