Date: Wed, 29 Aug 2012 09:38:24 -0700 From: Adrian Chadd <adrian@freebsd.org> To: "Wright, Brett" <Brett.Wright@cooperindustries.com> Cc: freebsd-wireless@freebsd.org, Kim Culhan <w8hdkim@gmail.com> Subject: Re: Atheros DFS radar detection Message-ID: <CAJ-Vmomx7z8Sy4p%2B9f_KC=ewas2N7CB-dWq1g8rSOWw_QsQvtQ@mail.gmail.com> In-Reply-To: <475A4E02EFF4724A9E58F55A56AC1316066D8665@APEVS1.ap.ci.root> References: <CAKZxVQU-%2BW9AP4a9W0PGyLmBOa1GVOrGcLC8bp5zW_=K%2Bv3tHA@mail.gmail.com> <475A4E02EFF4724A9E58F55A56AC13160641D618@APEVS1.ap.ci.root> <CAKZxVQWeOnw_kZWzuXfHSS-ssQfGVG=ybYK%2B%2B8EaqnFVe-rLpg@mail.gmail.com> <CAJ-Vmon=NfyZW9vJRSNxTLZvJhobeCP-S1O3TxopNzArWunCCQ@mail.gmail.com> <475A4E02EFF4724A9E58F55A56AC13160661E6AC@APEVS1.ap.ci.root> <CAJ-VmomJZD_NBM8=N1oD1a0XCFLoXoezStXHKLKCSGLBFrKT2Q@mail.gmail.com> <475A4E02EFF4724A9E58F55A56AC13160661F137@APEVS1.ap.ci.root> <CAJ-Vmo=6HLXxYLG3u-oAndR66wtnSySYm5Rp7Jp5T6eyiPq7UQ@mail.gmail.com> <475A4E02EFF4724A9E58F55A56AC131606667F85@APEVS1.ap.ci.root> <CAJ-Vmo=cC3SbtgRuVyjjseLg0E9SA1UBRh5fh_j1ROxo-p6PCw@mail.gmail.com> <475A4E02EFF4724A9E58F55A56AC131606692EA4@APEVS1.ap.ci.root> <CAJ-Vmo=2Uh0q7zrWdHswEaoGyAPT7pvTaKctcwajw0Y0Qg2Nxw@mail.gmail.com> <475A4E02EFF4724A9E58F55A56AC1316066D8665@APEVS1.ap.ci.root>
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On 28 August 2012 21:32, Wright, Brett <Brett.Wright@cooperindustries.com> wrote: >> Of course, it'd be really great if someone signed up for working on a >> BSD licenced radar pattern detector.. :) > > So what would be needed to get something based on the GPL licensed (i.e. > madwifi) pattern detector across to BSD license. The rules and > legalities of this make my head spin! Any suggestions? I'd honestly suggest just starting again, based on both the madwifi and the Linux ath9k DFS pattern matching module. The basic pattern matching technique isn't that hard. Dealing with false positives is the tricky bit. If someone does this, I'll even push to get the FFT data available (AR9130 and later, sorry!) so you can do accurate chirp detection. I'll even go through the carrier codebases and find all of the HAL DFS work arounds and commit them to the tree. Thanks, Adrian
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