Hi,
On Tue, May 31, 2016 at 6:14 PM, Hilbert Tu(杜睿哲_Pegatron) Hilbert_Tu@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@1f,0 irq [ + ] | |-- irq-router spi [ ] | `-- spi spi_flash [ ] | `-- spi-flash@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