diff options
| author | Mathias Nyman <mathias.nyman@linux.intel.com> | 2015-10-01 18:40:38 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-10-04 10:34:17 +0100 |
| commit | b50107bb83d027dfd36bb7efb90570559757d6ae (patch) | |
| tree | bfdf003f25884dd1e25fea40f80fdb2eb66808be /drivers/usb/host/xhci-pci.c | |
| parent | 7117522520b9101af7a0602d6b0d1e67d689fc6b (diff) | |
xhci: check xhci hardware for USB 3.1 support
Set the controller speed to HCD_USB31 to if host hardware supports USB 3.1
For PCI xhci controllers the USB 3.1 support is checked from SBRN bits in
pci config space. Platform controllers will need to set xhci->sbrn == 0x31
to indicate USB 3.1 support before calling xhci_gen_setup().
Also make sure xhci driver works correctly with speed set to HCD_USB31
Signed-off-by: Mathias Nyman <mathias.nyman@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 | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index c79d33676672..012d7f4c2901 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -200,15 +200,17 @@ static int xhci_pci_setup(struct usb_hcd *hcd) struct pci_dev *pdev = to_pci_dev(hcd->self.controller); int retval; + xhci = hcd_to_xhci(hcd); + if (!xhci->sbrn) + pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn); + retval = xhci_gen_setup(hcd, xhci_pci_quirks); if (retval) return retval; - xhci = hcd_to_xhci(hcd); if (!usb_hcd_is_primary_hcd(hcd)) return 0; - pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn); xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn); /* Find any debug ports */ |