Greetings,
I've been working on getting suspend (U3) support for USB 3.0 hubs in
the USB core, and I would appreciate it if you all could look over my
patches.
I've been testing with the TI TUSB8040 USB 3.0 hub evaluation board that
I got around November 2010. I'm pretty sure it hasn't gotten a firmware
update since then, which might explain the hard time I had getting it to
send remote wakeups for port change events (see patch four). Once that
patch was applied the hub seems to handle suspend and resume well, aside
from a couple instances where the hub would not report a device
disconnect when the device was suspended, but the hub was not. I
couldn't reproduce it consistently, so I assume it's probably a hardware
or firmware issue with the hub.
If someone from TI could point me to upgraded firmware for my hub, I
would be happy to test it further under Linux.
Sarah Sharp
The following changes since commit 435c724232457f32e66d6460d036c5f64f67b0a7:
Merge branch 'for-usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sarah/xhci into usb-next (2012-01-04 17:59:25 -0800)
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/sarah/xhci.git usb3-hub-suspend
Sarah Sharp (7):
xhci: Fix USB 3.0 device restart on resume.
USB: Remove duplicate USB 3.0 hub feature #defines.
USB/xhci: Enable remote wakeup for USB3 devices.
USB: Suspend functions before putting dev into U3.
USB/xHCI: USB 3.0 link PM change bit means port resume.
USB/xHCI: Enable USB 3.0 hub remote wakeup.
USB: Turn on auto-suspend for USB 3.0 hubs.
drivers/usb/core/hub.c | 72 ++++++++++++++++++++++++++++--------------
drivers/usb/host/xhci-hub.c | 41 ++++++++++++++++++++++++
drivers/usb/host/xhci-mem.c | 10 +++++-
drivers/usb/host/xhci-ring.c | 27 +++++++++++++--
include/linux/usb/ch11.h | 15 ++++-----
5 files changed, 128 insertions(+), 37 deletions(-)
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