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| author |   Hans de Goede <hdegoede@redhat.com> | 2018-03-20 15:57:09 +0300 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-22 13:40:10 +0100 |
| commit | fa31b3cb2ae143aa6e26974fcbe75689da60bdbe (patch) | |
| tree | e1a275097befb2221a38635f981545687a2044d1 /drivers/usb/host/xhci-pci.c | |
| parent | xhci: Add option to get next extended capability in list by passing id = 0 (diff) | |
| download | wireguard-linux-fa31b3cb2ae143aa6e26974fcbe75689da60bdbe.tar.xz wireguard-linux-fa31b3cb2ae143aa6e26974fcbe75689da60bdbe.zip | |
xhci: Add Intel extended cap / otg phy mux handling
The xHCI controller on various Intel SoCs has an extended cap mmio-range
which contains registers to control the muxing to the xHCI (host mode)
or the dwc3 (device mode) and vbus-detection for the otg usb-phy.
Having a role-sw driver included in the xHCI code (under drivers/usb/host)
is not desirable. So this commit adds a simple handler for this extended
capability, which creates a platform device with the caps mmio region as
resource, this allows us to write a separate platform role-sw driver for
the role-switch.
Note this commit adds a call to the new xhci_ext_cap_init() function
to xhci_pci_probe(), it is added here because xhci_ext_cap_init() must
be called only once. If in the future we also want to handle ext-caps
on non pci xHCI HCDs from xhci_ext_cap_init() a call to it should also
be added to other bus probe paths.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/xhci-pci.c')
| -rw-r--r-- | drivers/usb/host/xhci-pci.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index d9f831b67e57..f17b7eab66cf 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -178,6 +178,7 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci) if (pdev->vendor == PCI_VENDOR_ID_INTEL && pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI) { xhci->quirks |= XHCI_SSIC_PORT_UNUSED; + xhci->quirks |= XHCI_INTEL_USB_ROLE_SW; } if (pdev->vendor == PCI_VENDOR_ID_INTEL && (pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI || @@ -311,6 +312,10 @@ static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) goto dealloc_usb2_hcd; } + retval = xhci_ext_cap_init(xhci); + if (retval) + goto put_usb3_hcd; + retval = usb_add_hcd(xhci->shared_hcd, dev->irq, IRQF_SHARED); if (retval) |