Date: Tue, 13 Apr 2004 12:44:35 +0300 From: Teemu.Parkkinen@patria.fi To: freebsd-arch@freebsd.org Subject: Digital-tv card drivers and API discussion Message-ID: <OF2E836F34.E888AECD-ONC2256E75.0033299E@patria.fi>
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Hi all, I am about to write a digital tv-driver for my dvb-c -card. Because FreeBSD does not yet have any dvb-devices and I don't have any prior driver development experience, I have a couple of questions for you. 1) Should we use Linux-DVB API as a reference, or should we consider some changes to it? The API seems to be constantly changing and improving. Version 3 is available here: http://www.linuxtv.org/download/dvb/linux-dvb-api-1.0.0.pdf but they are currently working on version 4. In my opinion, the API should be minimal, but complete, so there is no need to constantly add new features to it. 2) As linux kernel is GPL-licensed, I cannot just port the linux driver to FreeBSD, right? In other words, we have to write the driver from scratch. In this case we don't have to stick with the Linux DVB-API and therefore I suggest that we give think the api through before deciding how we implement it (do we follow linux api or not). 3) Do you have any pointers to good books or other documentation on how to write device drivers for UNIX (BSD)? I already have read those from FreeBSD documentation, but a decent book would be handy. - Teemu Parkkinen
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