Hi Chin Liang, On 02.03.2016 13:24, Chin Liang See wrote: >> On 01.03.2016 14:38, Chin Liang See wrote: >>> On Tue, 2016-03-01 at 08:23 +0100, Stefan Roese wrote: >>>> On 01.03.2016 07:53, Chin Liang See wrote: >>>>> On Mon, 2016-02-29 at 23:55 +0100, Marek Vasut wrote: >>>>>> On 02/24/2016 09:59 AM, Bakhvalov, Denis (Nokia - PL/Wroclaw) >>>>>> wrote: >>>>>>> Hello Heiko, >>>>>>> >>>>>>>> Which U-Boot version? Which board? >>>>>>> >>>>>>> This is U-Boot v2016.03-rc1. I have custom board with >>>>>>> socfpga >>>>>>> Arria5 >>>>>>> onboard. >>>>>>> >>>>>>>> Where does this leading 0xff come from? There seems a >>>>>>>> problem >>>>>>>> with >>>>>>>> your spi nor flash driver? >>>>>>> >>>>>>> Yes, you're right. I have problems with the driver. As I >>>>>>> mentioned >>>>>>> in >>>>>>> previous mail when I read the contents from the flash some >>>>>>> data >>>>>>> is >>>>>>> corrupted. >>>>>>> >>>>>>> How to find out if the problem is because U-Boot has no >>>>>>> support >>>>>>> for >>>>>>> my flash (Spansion S25FL512S NOR flash with SPI) or I have >>>>>>> not >>>>>>> proper >>>>>>> configured SPI in U-Boot? >>>>>> >>>>>> I believe there is a problem with caches , which we still >>>>>> didn't >>>>>> identify. CCing Dinh and Chin, as they were the last ones >>>>>> looking >>>>>> into this problem. >>>>>> >>>>>> For now, try doing "dcache off" before using the QSPI NOR. >>>>>> >>>>> >>>>> We managed to get it work for socfpga. One of the issue dragged >>>>> me >>>>> long >>>>> is the CONFIG_SPI_FLASH_USE_4K_SECTORS. Need to ensure its not >>>>> defined >>>>> in the defconfig. Hope it helps >>>> >>>> This is not clear to me. You mean you were able to reproduce and >>>> solve this cache (S-bit) related issue by disabling >>>> CONFIG_SPI_FLASH_USE_4K_SECTORS? This option is disabled for all >>>> SoCFPGA board in mainline. >>>> >>>> Could you please explain in more details what exactly you did to >>>> solve this issue on SPI NOR? >>>> >>> >>> Nope, I am not replicating the issue. My board is having Micron >>> instead >>> of Spansion flash. In previously, CONFIG_SPI_FLASH_USE_4K_SECTORS >>> is >>> defined in socfpga as most serial NOR flash are supporting 4k sub >>> sector. With that, it would be good to ensure the 4K is undefined. >>> >>> In this case, wonder any details on the failure? Intermittent? >> >> I think we are talking about different things here. I'm referring >> to Marek mentioning the cache problem (S-bit related) on current >> SoCFPGA U-Boot mainline. With caches enabled you can experience >> problems on QSPI and on USB (reported from Marek - I didn't test >> USB yet). >> > > For QSPI, wonder the issue is on the read or write?
I'm not 100% sure here if this never happens on read. But it definitely happens on write. saveeenv to SPI NOR causes serious problems here for example. >> So do you have any updated on this cache / S-bit problem? > > I am still debugging this as I notice the hub is not able to detect the > mass storage. This is only for certain pen drive. > >> Or can you >> use QSPI NOR without any issues on current mainline U-Boot with >> caches enabled on your platforms? >> > > The issue I have is on USB only. For NOR, I can ubifsmount and > ubifsload with Micron NOR flash without issue. This is with dcache > enabled Strange. I have Micron here on the SR1500 as well: => sf probe SF: Detected N25Q128 with page size 256 Bytes, erase size 64 KiB, total 16 MiB Thanks, Stefan _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot