[U-Boot] u-boot-x86 sf probe fail

[Bin Meng]

Hi,

On Tue, May 31, 2016 at 6:14 PM, Hilbert Tu(杜睿哲_Pegatron)
<Hilbert_Tu at pegatroncorp.com> wrote:
> Hi,
>
> I use Coreboot with u-boot-x86 as payload to bring-up my Intel Atom C2000 platform, but I cannot make my SPI flash(w25q128fv) to work.
> Actually the SPI was detected under coreboot with correct ID, but in u-boot “sf probe” command, it just always failed.
> After tracing and code dump, I found it was failed due to SPIS_FCERR in spi/ich.c spi_xfer function.
> I totally have no idea why this happened and how to proceed my bring-up.
> My u-boot-x86 is up-to-date version and the SPI use intel,ich9-spi compatible in my dts file.
>

Can you double check Atom C2000 SPI controller that it is ICH9
compatible? Or maybe ICH7 compatible? Did you check its register can
be accessed correctly?

> Following is my dm tree and there is spi-flash device
>
> => dm tree
> Class       Probed   Name
> ----------------------------------------
> root        [ + ]    root_driver
> serial      [ + ]    |-- serial
> keyboard    [ + ]    |-- keyboard
> rtc         [   ]    |-- rtc
> timer       [ + ]    |-- tsc-timer
> pci         [ + ]    `-- pci
> pch         [ + ]        |-- pch at 1f,0
> irq         [ + ]        |   |-- irq-router
> spi         [   ]        |   `-- spi
> spi_flash   [   ]        |       `-- spi-flash at 0
> pci_generic [   ]        |-- pci_0:0.0
> pci         [ + ]        |-- pci_0:1.0
> pci_generic [   ]        |   `-- pci_1:0.0
> pci         [ + ]        |-- pci_0:3.0
> pci_generic [   ]        |-- pci_0:e.0
> pci_generic [   ]        |-- pci_0:f.0
> pci_generic [   ]        |-- pci_0:13.0
> usb         [   ]        |-- ehci_pci
> pci_generic [   ]        |-- pci_0:17.0
> pci_generic [   ]        |-- pci_0:18.0
> pci_generic [   ]        `-- pci_0:1f.3
> =>
> Could you please give me some hint or tell me where I can reference? Thanks.
>

Regards,
Bin