tree b512c3e8c7940d2a38a178151382fec645d69f42
parent 3db02616a7ccd66867bf43b1a143ee8652834c7a
author Bin Meng <bmeng.cn@gmail.com> 1500472275 +0800
committer Santan Kumar <santank@codeaurora.org> 1528193400 +0530

usb: xhci: Program 'route string' in the input slot context

xHCI spec says: the values of the 'route string' field shall be
initialized by the first 'Address Device' command issued to a
device slot, and shall not be modified by any other command.

So far U-Boot does not program this field, and it does not prevent
SS device directly attached to root port, or HS device behind an HS
hub, from working, due to the fact that 'route string' is used by
the xHC to target SS packets. But in order to enumerate devices
behind an SS hub, this field must be programmed.

With this commit and along with previous commits, now SS & HS devices
attached to a USB 3.0 hub can be enumerated by U-Boot.

As usual, this new feature is only available when DM is on.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
(cherry picked from commit 493b8dd070f2412b49190b71b44baddbb2b24e37)
Signed-off-by: Santan Kumar <santank@codeaurora.org>

Change-Id: I367a0f1fa5e310c1c6af2d4675a86a3293337d64