diff options
| author | Manoj Iyer <manoj.iyer@canonical.com> | 2012-08-22 11:53:18 -0500 |
|---|---|---|
| committer | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2012-09-04 15:07:29 -0700 |
| commit | 29d214576f936db627ff62afb9ef438eea18bcd2 (patch) | |
| tree | ca724d479d7dd8350f31a53590b0bc7c1bcdd2e7 /drivers/usb | |
| parent | fea7a08acb13524b47711625eebea40a0ede69a0 (diff) | |
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.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c index c5e9e4a76f1..486e8122f0d 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 |