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Best Open Source License For Hardware?
An anonymous reader writes "MIT recently open-sourced some really cool hardware designs, including an H.264 video decoder and an OFDM transceiver, under MIT's open source license (a.k.a. the X11 license). Now, the OpenCores FAQ recommends that people use either the GPL, LGPL, or modified BSD license; they do not mention the MIT license at all. And, according to the Free Software Foundation the GPL license can be used for hardware, but they do not list the LPGL, modified BSD, or MIT licenses as suitable for non-software. Would you or your company use hardware source-released under the MIT license? What's the best license to use for releasing hardware?"
This is the reason that TAPR created the Open Hardware License. It is available in two versions - the Open Hardware License, and the Non-Commercial Open Hardware License. The former is like GPL for hardware, and the latter provides a license that can be used to allow a company to open a design without giving their competitors the chance to use the design commercially.
It is designed to provide many protections including of the circuit designs and layouts, and patent protection.
Darryl
P.S. I am on the board of TAPR
"The Free Software Foundation has a transparent agenda: GPL at all costs."
Don't spread FUD about the FSF. Their agenda is not the GPL at all costs, it is to promote free software, and those are two different things.
Counterexamples to your claim of "GPL at all costs":
- The FSF plainly says that free software does not require using the GPL [0]
- The FSF plainly says that releasing software under the modified BSD license (or another non-copyleft license) is not wrong [1]
- The FSF does not use the GPL for all of its software, because it hopes that by doing so it will promote free software [2]
[0] http://www.gnu.org/licenses/gpl-faq.html#DoesFreeSoftwareMeanUsingTheGPL
[1] http://www.gnu.org/philosophy/why-copyleft.html
[2] http://www.gnu.org/licenses/why-not-lgpl.html
I wrote the section of the OpenCores FAQ that the story refers to so I can give a little background history.
...) it was decided that licenses such as the GPL could be applied. It is still not clear by what legal mechanism a hardware manufacturer can be forced to disclose the "open" portions of a system.
The FAQ answer was the result of an extended discussion on the OpenCores mailing lists about the best license to use. We didn't come up with a definitive answer and the GPL, LGPL, modified BSD recommendation was aimed at reducing license proliferation while giving people a choice between copyleft and non-copyleft. The MIT license was judged to be close enough to the modified BSD license (also noted by OSI) that we could just choose one of them. Reducing proliferation was an issue since people were experimenting with different homebrewed licenses with potential to fragment the community.
Open and Free licensing is still a murky issue for hardware as much of hardware falls outside of copyright. In so far as copyright applies (schematics, bitstreams, source code,
For example say someone builds an integrated circuit using GPLd VHDL from the OpenCores website. The chip might be covered by circuit layout rights but it is questionable whether copyright is applicable. It seems unclear that the GPL can be applied to a chip. A system such as a circuit board is even murkier since it is not covered by circuit layout rights and being a functional system might fall outside copyright (despite manufacturers plastering their boards with the copyright symbol). Any copyright could also be circumvented by rerunning an autorouter with a different seed to generate a different pattern of PCB tracks.
It will be very interesting to see what conclusion Eben Moglen, Mary Lou Jepsen and so on come to now that the OLPC and Pixel Qi have prompted the Free Software community to seriously examine the underpinnings of Free Hardware. A number of years ago Richard Stallman was of the view that Free Hardware was outside the mission of the FSF and freedom for hardware was not relevant since the difficulty of manufacturing was a greater barrier to freedom than the law.