On 07/23/2012 08:44 PM, Sarah Sharp wrote:
> Did you try disabling the wake on bits in the port status registers? I
> would prefer that solution if it works.
No, I didn't. Why we need to disable wake on capabilities?
>
> Otherwise this patchset looks fine. I'll work with the hardware folks
> and see if this is exposed on other boards. Also, this is not a BIOS
> bug, but a hardware issue that can be worked around in BIOS. So I might
> edit your description on the first patch a bit when I submit it to Greg.
Of course, please edit it if required.
>
> Sarah Sharp
>
> On Mon, Jul 23, 2012 at 02:46:32PM +0300, Denis Turischev wrote:
>> Intense-PC is Compulab's mini-desktop with Intel Panther Point
>> chipset.
>>
>> Unconditional switchover to xHCI provided by function
>> usb_enable_xhci_ports() leads to surprising results, after shutdown
>> system powered-on again after a few seconds. On Windows power
>> related problems were not observed. Switching back to EHCI solves
>> the problem.
>>
>> The patch switches usb ports back to EHCI during xhci shutdown
>> for Intense-PC.
>>
>> Signed-off-by: Denis Turischev <denis@xxxxxxxxxxxxxx>
>> ---
>> drivers/usb/host/xhci.c | 14 ++++++++++++++
>> 1 file changed, 14 insertions(+)
>>
>> diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
>> index a979cd0..541efaa 100644
>> --- a/drivers/usb/host/xhci.c
>> +++ b/drivers/usb/host/xhci.c
>> @@ -26,6 +26,8 @@
>> #include <linux/module.h>
>> #include <linux/moduleparam.h>
>> #include <linux/slab.h>
>> +#include <linux/dmi.h>
>> +#include "pci-quirks.h"
>>
>> #include "xhci.h"
>>
>> @@ -656,8 +658,20 @@ void xhci_stop(struct usb_hcd *hcd)
>> */
>> void xhci_shutdown(struct usb_hcd *hcd)
>> {
>> + struct pci_dev *pdev;
>> + const char *brd_name;
>> struct xhci_hcd *xhci = hcd_to_xhci(hcd);
>>
>> + pdev = to_pci_dev(hcd->self.controller);
>> +
>> + if (usb_is_intel_switchable_xhci(pdev)) {
>> + brd_name = dmi_get_system_info(DMI_BOARD_NAME);
>> +
>> + /* quirk for Compulab's Intense-PC board */
>> + if (brd_name && strstr(brd_name, "Intense-PC"))
>> + usb_disable_xhci_ports(pdev);
>> + }
>> +
>> spin_lock_irq(&xhci->lock);
>> xhci_halt(xhci);
>> spin_unlock_irq(&xhci->lock);
>> --
>> 1.7.9.5
>>
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
