summaryrefslogtreecommitdiffstats
path: root/drivers/usb
diff options
context:
space:
mode:
authorManoj Iyer <manoj.iyer@canonical.com>2012-08-22 11:53:18 -0500
committerSarah Sharp <sarah.a.sharp@linux.intel.com>2012-09-04 15:07:29 -0700
commit29d214576f936db627ff62afb9ef438eea18bcd2 (patch)
treeca724d479d7dd8350f31a53590b0bc7c1bcdd2e7 /drivers/usb
parentfea7a08acb13524b47711625eebea40a0ede69a0 (diff)
downloadop-kernel-dev-29d214576f936db627ff62afb9ef438eea18bcd2.zip
op-kernel-dev-29d214576f936db627ff62afb9ef438eea18bcd2.tar.gz
xhci: Recognize USB 3.0 devices as superspeed at powerup
On Intel Panther Point chipset USB 3.0 devices show up as high-speed devices on powerup, but after an s3 cycle they are correctly recognized as SuperSpeed. At powerup switch the port to xHCI so that USB 3.0 devices are correctly recognized. BugLink: http://bugs.launchpad.net/bugs/1000424 This patch should be backported to kernels as old as 3.0, that contain commit ID 69e848c2090aebba5698a1620604c7dccb448684 "Intel xhci: Support EHCI/xHCI port switching." Signed-off-by: Manoj Iyer <manoj.iyer@canonical.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/host/pci-quirks.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index c5e9e4a..486e812 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -870,9 +870,10 @@ static void __devinit quirk_usb_handoff_xhci(struct pci_dev *pdev)
/* Disable any BIOS SMIs and clear all SMI events*/
writel(val, base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET);
+hc_init:
if (usb_is_intel_switchable_xhci(pdev))
usb_enable_xhci_ports(pdev);
-hc_init:
+
op_reg_base = base + XHCI_HC_LENGTH(readl(base));
/* Wait for the host controller to be ready before writing any
OpenPOWER on IntegriCloud