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authorSarah Sharp <sarah.a.sharp@linux.intel.com>2012-05-16 13:36:24 -0700
committerSarah Sharp <sarah.a.sharp@linux.intel.com>2012-05-18 15:42:04 -0700
commite3567d2c15a7a8e2f992a5f7c7683453ca406d82 (patch)
tree2442117f7358e50f49cfecd030a6017d392f474c /drivers/usb/host/xhci-pci.c
parent3b3db026414bba1c8f45c49d5eeaefd48d66e1ae (diff)
downloadlinux-stericsson-e3567d2c15a7a8e2f992a5f7c7683453ca406d82.tar.gz
xhci: Add Intel U1/U2 timeout policy.
All Intel xHCI host controllers support USB 3.0 Link Power Management. The Panther Point xHCI host controller needs the xHCI driver to calculate the U1 and U2 timeout values, because it will blindly accept a MEL that would cause scheduling issues. The Lynx Point xHCI host controller will reject MEL values that are too high, but internally it implements the same algorithm that is needed for Panther Point xHCI. Simplify the code paths by just having the xHCI driver calculate what the U1/U2 timeouts should be. Comments on the policy are in the code. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Diffstat (limited to 'drivers/usb/host/xhci-pci.c')
-rw-r--r--drivers/usb/host/xhci-pci.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 890ba735dee7..18b231b0c5d3 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -84,6 +84,10 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
/* AMD PLL quirk */
if (pdev->vendor == PCI_VENDOR_ID_AMD && usb_amd_find_chipset_info())
xhci->quirks |= XHCI_AMD_PLL_FIX;
+ if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
+ xhci->quirks |= XHCI_LPM_SUPPORT;
+ xhci->quirks |= XHCI_INTEL_HOST;
+ }
if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
pdev->device == PCI_DEVICE_ID_INTEL_PANTHERPOINT_XHCI) {
xhci->quirks |= XHCI_SPURIOUS_SUCCESS;