Android Fastboot support

From: Rob Herring <[email protected]>

This is the 3nd version since I revived the fastboot patches Sebastian submitted.

I'm reviving the Android Fastboot support after 2+ years since the last posting[1]. The previous postings had some questions about licensing and source of some code. I believe I've traced the history sufficiently that the copyrights and source information are complete and correct.

The Android code used or referenced is BSD 2-clause license. This was originally raised by Wolfgang that it was not compatible with GPLv2+. I believe that has since been demonstrated and agreed that the BSD 2-clause license is compatible with u-boot.

As far as the history of the code, I have traced that back. The u-boot code started in 2008/2009 by Tom Rix @ Windriver. This initial support was then adopted and extended by TI (eMMC support primarily, not included here) in their OMAP u-boot tree[2]. In 2011, the TI code was used as a basis for upstream patches by Sebastian Siewior @ Linutronix. The code has been rearranged quite a bit since the original, but the content is pretty much the same. Some of the re-arranging left stale or missing copyrights in the v2 version which I have corrected.

This version is rebased on u-boot usb tree with the recent USB downloader gadget registration changes. The primary change is documentation added to README for new config options.

I've tested this series on a BeagleBoard.