[U-Boot] Newbie SPL question for socfpga_sockit

[Dinh Nguyen]

On 03/03/2016 04:09 PM, Marek Vasut wrote:
> On 03/03/2016 11:00 PM, George Broz wrote:
>> On 3 March 2016 at 06:51, Marek Vasut <marex at 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
> 
> This more likely means that either clock or reset bits are not
> configured correctly OR you're using the wrong controller. Since
> you're mixing old U-Boot SPL with new U-Boot, there can be some
> discrepancy and I have no idea how to help you with that :(
> 

Can you try these steps?

1)Boot up
2)"dcache off"
3)"mw.l 0xffb40440 0x00001000 1"
4)"usb start"

On the devkit, it seems that the USB port power bit is not getting
turned on, so it's failing to detect the USB device. You can probably
ignore stop 2, if you already Marek's patch.

Dinh