tree 3117859503e3c7497f7b180d55bad666abaa5825
parent 719d7d8df41d2f20be599c38c3ab3e7a904c92c6
author Chunfeng Yun <chunfeng.yun@mediatek.com> 1599584396 +0200
committer Marek Vasut <marex@denx.de> 1601574185 +0200

usb: xhci: create one unified function to calculate TRB TD remainder

xhci versions 1.0 and later report the untransferred data remaining in a
TD a bit differently than older hosts.

We used to have separate functions for these, and needed to check host
version before calling the right function.

Now Mediatek host has an additional quirk on how it uses the TD Size
field for remaining data. To prevent yet another function for calculating
remainder we instead want to make one quirk friendly unified function.

Porting from the Linux:
c840d6ce772d("xhci: create one unified function to calculate TRB TD remainder.")
124c39371114("xhci: use boolean to indicate last trb in td remainder calculation")

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>