PCI: Override Synopsys USB 3.x HAPS device class (03e67425) · Commits · 戴 / test

drivers/pci/quirks.c

+24 −0

Original line number	Original line	Diff line number	Diff line
	@@ -618,6 +618,30 @@ static void quirk_amd_nl_class(struct pci_dev *pdev)
	DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB,		DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB,
	quirk_amd_nl_class);		quirk_amd_nl_class);

			/*
			* Synopsys USB 3.x host HAPS platform has a class code of
			* PCI_CLASS_SERIAL_USB_XHCI, and xhci driver can claim it. However, these
			* devices should use dwc3-haps driver. Change these devices' class code to
			* PCI_CLASS_SERIAL_USB_DEVICE to prevent the xhci-pci driver from claiming
			* them.
			*/
			static void quirk_synopsys_haps(struct pci_dev *pdev)
			{
			u32 class = pdev->class;

			switch (pdev->device) {
			case PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3:
			case PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI:
			case PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31:
			pdev->class = PCI_CLASS_SERIAL_USB_DEVICE;
			pci_info(pdev, "PCI class overridden (%#08x -> %#08x) so dwc3 driver can claim this instead of xhci\n",
			class, pdev->class);
			break;
			}
			}
			DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SYNOPSYS, PCI_ANY_ID,
			quirk_synopsys_haps);

	/*		/*
	* Let's make the southbridge information explicit instead of having to		* Let's make the southbridge information explicit instead of having to
	* worry about people probing the ACPI areas, for example.. (Yes, it		* worry about people probing the ACPI areas, for example.. (Yes, it