[U-Boot] Newbie SPL question for socfpga_sockit

George Broz
2016-03-03T22:00:53Z

On 3 March 2016 at 06:51, Marek Vasut <marex@denx.de> wrote:
> On 03/03/2016 03:48 PM, Dinh Nguyen wrote:
>>
>>
>> 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),
>>>

The 2016.01 code I'm using already includes this patch. If I try
reading a USB stick with dcache on or off
I get the same result:

=> dcache off
=> usb reset
resetting USB...
USB0: Core Release: 2.93a
dwc_otg_core_host_init: Timeout!
dwc_otg_core_host_init: Timeout!
dwc_otg_core_host_init: Timeout!
dwc_otg_core_host_init: Timeout!
dwc_otg_core_host_init: Timeout!
dwc_otg_core_host_init: Timeout!
dwc_otg_core_host_init: Timeout!
dwc_otg_core_host_init: Timeout!
dwc_otg_core_host_init: Timeout!
dwc_otg_core_host_init: Timeout!
dwc_otg_core_host_init: Timeout!
dwc_otg_core_host_init: Timeout!
dwc_otg_core_host_init: Timeout!
dwc_otg_core_host_init: Timeout!
dwc_otg_core_host_init: Timeout!
scanning bus 0 for devices... 1 USB Device(s) found
=> usb tree
USB device tree:
1 Hub (480 Mb/s, 0mA)
U-Boot Root Hub

>>
>> 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.
>
> Yeah, the USB issue happens only with some stick :-/

I've tried five different sticks, same result.

--George

>
>
> --
> Best regards,
> Marek Vasut
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