On Mon, Sep 29, 2014 at 11:28:57AM +0300, Heikki Krogerus wrote:
> > > > A question, the dwc3 controller is the PCI-E device in my platform,
> > > > but the class code of PCI header is 0x0c0330, the same with xHC.
> > > > That's because it need to meet the windows enviroment. The dwc3
> > > > controller acted as only host mode to bind with windows xhci driver.
> > > > But on linux, sometimes, we auto-bind with xhci driver as well (class
> > > > code 0x0c0330) despite we use Pid/Vid on dwc3 driver. Then I need
> > > > rmmod xhci_hcd module and modprobe dwc3_pci module manually.
> > > >
> > > > Any idea to resolve this issue?
>
> Declare a fixup quirk. I'm not a pci expert, but I think something
> like this should work..
>
> static void dwc3_fix_amd_nl_class(struct pci_dev *pdev)
> {
> pdev->class = 0x0c03fe;
> }
> DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL,
> dwc3_fix_amd_nl_class);
>
Heikki, your info inspires me. :)
I looked at pci driver, this update should put in pci/quirks.c.
Because the behavior of the global pci_fixups_header array is
maintained at that file.
When system inits, pci driver would load fixup devices before driver
attached. So it should define the fixup header under pci/quirks.c.
After do some tests in my side. This quirk works well.
Thanks,
Rui
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