Date: Sat, 02 Sep 2017 08:10:49 +0000 From: "Thomas Mueller" <mueller6722@twc.com> To: freebsd-wireless@freebsd.org Subject: Re: Adding wifi source code Message-ID: <F1.BE.31699.F876AA95@dnvrco-omsmta03> References: <CAFg2nZZRgenQOua4uhx_mPr1qUd9f3dt_2=ztfyjOBks7A3Ycg@mail.gmail.com> <68.D0.25924.050D9A95@dnvrco-omsmta02> <CALM2mEniO%2Bma1Fh_mW-xfk07QJKA2cF7jO9SvttMXWsXf4NgEA@mail.gmail.com> <CAFd4kYCXGzF8AzyBhPbMnEqK9QxdfTMf3PqXzG7wJwvb00txNA@mail.gmail.com>
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> Here's a pdf giving a decent overview: > https://www.bsdcan.org/2006/papers/freebsd.device.driver.slides.pdf > But, the FreeBSD handbook also goes over the process as well. > https://www.freebsd.org/doc/en_US.ISO8859-1/books/arch-handbook/driverbasics.html > For the guy that took Linux drivers, you might want to look into the Linux > Emulator, that would be the easiest path especially if those Linux drivers > includes a lot of Linux specific headers. > The NetBSD drivers should be a bit easier to port. > Best, > Owen I downloaded it but haven't read yet. Actually, it's the arch-handbook, not in the regular FreeBSD handbook. Thanks for the leads! > I was planning on also porting over the Atheros AR9271 driver from NetBSD > (athn(4) /usr/src/sys/dev/usb/if_athn_usb.c), but not until I finish the > current device I am working on. It might not be for a while though. There > is likely a lot of shared code with ath(4) on FreeBSD > (/usr/src/sys/dev/athn). NetBSD seems to separate all code between USB and > PCI, whereas FreeBSD combines drivers. Let me know if I can help out, as I > already own this device and would be willing to test out code or > troubleshoot with you. > I am currently working on another driver from Linux to FreeBSD. The core > concepts are the same, but a lot of code is in different order. FreeBSD > drivers have an attach function that assign function pointers to the softc > struct. The Linux equivalent is in DRIVERNAME_ops. In my case, this: > http://src.illumos.org/source/xref/linux-master/drivers/net/wireless/realtek/rtlwifi/rtl8188ee/sw.c#224 > Hope this helps. But yes, would love to work on AR9271! What is the rtl8188ee? Maybe I'd recognize the brand and model. I have Hiro H50191, which uses rsu driver. That last URL looks like something related to Illumos and OpenIndiana. My Atheros AR9271 is (quasi-)USB, an inseparable part of the motherboard in contrast to the Hiro H50191 which is a USB-stick wireless adapter. It has sometimes worked on NetBSD, but more often would fail to load firmware. On latest NetBSD-current, it stops the kernel from booting unless I disable it or comment out in kernel config. GENERIC kernel reboots immediately without showing any messages. OpenBSD also has AR9271 driver and Realtek re. I have NetBSD installations but no OpenBSD. I would like, at first, if possible, when I have a driver to build, to build the module rather than the whole kernel every time. I am familiar with C and C++ but think I need to brush up. Any online leads/references? Tom
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