[PATCH v5 7/9] usb: host: pci-quirks: Bypass xHCI quirks for Raspberry Pi 4
From: Nicolas Saenz Julienne <hidden>
Date: 2020-06-29 19:34:50
Also in:
linux-pci, linux-usb, lkml
Subsystem:
the rest, usb subsystem, usb xhci driver · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Mathias Nyman
The board doesn't need the quirks to be run, and takes care of its own initialization through a reset controller device. So let's bypass them. Signed-off-by: Nicolas Saenz Julienne <redacted> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> --- Changes since v2: - Correct reference counting on parent device node Changes since v1: - Correct typos drivers/usb/host/pci-quirks.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index 358015328391..977d0b6d7577 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c@@ -16,6 +16,7 @@ #include <linux/export.h> #include <linux/acpi.h> #include <linux/dmi.h> +#include <linux/of.h> #include "pci-quirks.h" #include "xhci-ext-caps.h"
@@ -1244,11 +1245,27 @@ static void quirk_usb_handoff_xhci(struct pci_dev *pdev) static void quirk_usb_early_handoff(struct pci_dev *pdev) { + struct device_node *parent; + bool is_rpi; + /* Skip Netlogic mips SoC's internal PCI USB controller. * This device does not need/support EHCI/OHCI handoff */ if (pdev->vendor == 0x184e) /* vendor Netlogic */ return; + + /* + * Bypass the Raspberry Pi 4 controller xHCI controller, things are + * taken care of by the board's co-processor. + */ + if (pdev->vendor == PCI_VENDOR_ID_VIA && pdev->device == 0x3483) { + parent = of_get_parent(pdev->bus->dev.of_node); + is_rpi = of_device_is_compatible(parent, "brcm,bcm2711-pcie"); + of_node_put(parent); + if (is_rpi) + return; + } + if (pdev->class != PCI_CLASS_SERIAL_USB_UHCI && pdev->class != PCI_CLASS_SERIAL_USB_OHCI && pdev->class != PCI_CLASS_SERIAL_USB_EHCI &&
--
2.27.0
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