linux/drivers/usb/core
Stanislaw Ledwon 8bea2bd37d usb: Add support for root hub port status CAS
The host controller port status register supports CAS (Cold Attach
Status) bit. This bit could be set when USB3.0 device is connected
when system is in Sx state. When the system wakes to S0 this port
status with CAS bit is reported and this port can't be used by any
device.

When CAS bit is set the port should be reset by warm reset. This
was not supported by xhci driver.

The issue was found when pendrive was connected to suspended
platform. The link state of "Compliance Mode" was reported together
with CAS bit. This link state was also not supported by xhci and
core/hub.c.

The CAS bit is defined only for xhci root hub port and it is
not supported on regular hubs. The link status is used to force
warm reset on port. Make the USB core issue a warm reset when port
is in ether the 'inactive' or 'compliance mode'. Change the xHCI driver
to report 'compliance mode' when the CAS is set. This force warm reset
on the root hub port.

This patch should be backported to stable kernels as old as 3.2, that
contain the commit 10d674a82e "USB: When
hot reset for USB3 fails, try warm reset."

Signed-off-by: Stanislaw Ledwon <staszek.ledwon@linux.intel.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Acked-by: Andiry Xu <andiry.xu@amd.com>
Cc: stable@vger.kernel.org
2012-07-02 12:51:24 -07:00
..
Kconfig usb: Kconfig: remove unneeded default value 2012-05-14 08:49:50 -07:00
Makefile usb: Bind devices to ACPI devices when possible 2012-05-11 17:06:13 -07:00
buffer.c USB: Core: Fix minor coding style issues 2011-01-22 19:35:39 -08:00
config.c usbcore: get BOS descriptor set 2011-09-26 15:51:08 -07:00
devices.c Revert "usb: move struct usb_device->children to struct usb_hub_port->child" 2012-05-14 09:20:37 -07:00
devio.c USB: Remove races in devio.c 2012-05-18 16:37:55 -07:00
driver.c USB: Disable USB 3.0 LPM in critical sections. 2012-05-18 15:41:59 -07:00
endpoint.c USB: use usb_endpoint_maxp() instead of le16_to_cpu() 2011-08-23 09:47:40 -07:00
file.c USB: file.c: remove dbg() usage 2012-05-01 21:33:35 -07:00
generic.c USB: accept RNDIS configs if there's no alternative 2010-08-10 14:35:43 -07:00
hcd-pci.c USB: add NO_D3_DURING_SLEEP flag and revert 151b612847 2012-06-13 13:11:39 -07:00
hcd.c USB: Make sure to fetch the BOS desc for roothubs. 2012-05-18 15:41:53 -07:00
hub.c usb: Add support for root hub port status CAS 2012-07-02 12:51:24 -07:00
message.c USB: fix gathering of interface associations 2012-06-14 17:13:34 -07:00
notify.c usb: Add export.h for EXPORT_SYMBOL/THIS_MODULE where needed 2011-10-31 19:31:25 -04:00
otg_whitelist.h USB: fix codingstyle issues in drivers/usb/core/*.h 2008-02-01 14:35:07 -08:00
quirks.c usb: add USB_QUIRK_RESET_RESUME for M-Audio 88es 2012-04-30 10:26:42 -04:00
sysfs.c sysfs: get rid of some lockdep false positives 2012-05-14 12:19:56 -07:00
urb.c usbhid: prevent deadlock during timeout 2012-05-01 13:22:13 -04:00
usb-acpi.c usb: Set device removable state based on ACPI USB data 2012-05-11 17:07:02 -07:00
usb.c usb: fix breakage on systems without ACPI 2012-05-16 05:29:19 -07:00
usb.h usb: Bind devices to ACPI devices when possible 2012-05-11 17:06:13 -07:00