tree 1c88cdc0bf55fb5c4fd9ca8d3ac6aac104167ba1
parent c65e692f2518ba55252b15e2c4b49556fdda2143
author Stephen Warren <swarren@nvidia.com> 1391792030 -0700
committer Marek Vasut <marex@denx.de> 1394474016 +0100

ush: ehci: initialize altnext pointers in QH

Section 4.10.2 "Advance Queue" of ehci-specification-for-usb.pdf
specifies how an EHCI controller loads a new QTD for processing if the
QH is not already marked as active. It states:

=====
If the field Bytes to Transfer is not zero and the T-bit in the Alternate
Next qTD Pointer is set to zero, then the host controller uses the
Alternate Next qTD Pointer. Otherwise, the host controller uses the Next
qTD Pointer. If Next qTD Pointer’s T-bit is set to a one, then the host
controller exits this state and uses the horizontal pointer to the next
schedule data structure.
=====

Hence, we must ensure that the alternate next QTD pointer's T-bit
(TERMINATE) is set, so the EHCI controller knows to use the next QTD
pointer.

Signed-off-by: Stephen Warren <swarren@nvidia.com>