Date: Wed, 11 Oct 2006 13:31:38 +0200 From: Laurent Courty <lrntct@gmail.com> To: freebsd-multimedia@freebsd.org Subject: Re: Status of VIA Envy24 audio controller Message-ID: <200610111331.39605.lrntct@gmail.com> In-Reply-To: <787520ee0607180732r6bcb1ae4h1591230d2db366a@mail.gmail.com> References: <200606072039.13422.shoesoft@gmx.net> <8103ad500607180035t50633780wbf585805464b8696@mail.gmail.com> <787520ee0607180732r6bcb1ae4h1591230d2db366a@mail.gmail.com>
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Le mardi 18 juillet 2006 16:32, Laurent C. a =C3=A9crit=C2=A0: > 2006/7/18, Konstantin Dimitrov : > > i use Envy24PT (VT1720) datasheet to add Envy24HT-S (VT1721) support, so > i'm > > > expecting Envy24MT(VT1720T) also to be very similar (in term of > > registers) to Envy24PT (VT1720), my only concern is that VT1720T has > > different chip package than VT1720, so maybe different pin assignment, > > maybe the pins are also identical, but without datasheet, nothing can be > > 100% sure, so i can be almost sure that VT1720T is almost identical to > > VT1720. > > I've just sent a datasheet request to VIA. > > > if VT1720T and VT1720 have identical pin assignment the only thing you ne= ed > > > to do is to find the wiring between the VT1720T and WM8716 chip using > > ohmmeter (to be more specific the wiring between 3 control pins of WM87= 16 > > and some of the 16 GPIO pins of Envy24 chip, so no more than 3*16=3D48 > > checks are required). > > > > I don't understand exactly what do you call "reference design", but the > > > > > Chaintech and Onkyo board doesn't look very similar to me. > > > > i'm using "reference design" for all cards that use one of the designs > > listed here: > > > > > > > > http://xkodi.svobodno.com/envy24/envy24_ref_e2proms/envy24_ref_e2proms.= ht > >ml > > > > all boards with reference design use the same VIA reference driver under > > Windows. the driver "speaks" only with Envy24 chip and with audio codec > > chip ( via Envy24 chip ) and doesn't care about other components on the > > board like resistors, capacitators, etc. so they may look very differen= t, > > but all boards, for example, like Chaintech AV710 (number 7 in the list= ), > > that use Envy24 + WM8728, have the same wiring between Envy24 and WM872= 8, > > because VIA reference driver needs to know that wiring to be able to wo= rk > > with them. Same apply for FreeBSD driver, so when we know wiring for > > reference design number 7 (AV710) all cards that use that design, for > > example, like OOAOO SQ710II will run with the same driver code. > > > > Chaintech and Onkyo board are with different reference design - Chainte= ch > > board is number 7 in the list and Onkyo board is number 5 and that is w= hy > > the wiring of SE-90 is unknown, i know only wiring for reference design > > number 7 (AV710) and for some non-reference boards like Terratec Aureon > > Space, but Chaintech and Onkyo board use almost identical Envy24 chips, > > so almost no additional Envy24 related code will be required, only code > > for the new audio codec (WM8716) and the new wiring (between the Envy24 > > chip and WM8716), which should be easy. > > Thanks, I understand better now. > > > For now, I do not have a SE-90. I will not spend 110=E2=82=AC in an audio= card if > > > > there aren't good chance for it to be supported by my OS of choice. > > > On the other hand, if you tell me that this card could to be supported > > > "for > > > almost sure", I could buy it. > > > > to summarize: > > it is almost sure that VT1720T is almost identical to VT1720 and if so, > > the only needed thing is the wiring between VT1720T and WM8716 used on > > SE-90 board, but i say "almost", so there is always chance that VT1720T > > has different pin assignment ... > > > > SE-90 is very expensive, it is your decision ... > > Thanks, let see the VIA's answer. Hi list, I haven't received any answer to my "web page" request. But at the beginnin= g=20 of October, a quote from Theo De Raadt give me some motivation. So I sent a= n=20 email to two VIA people. I've got an answer last Monday : "The datasheet is only available under=20 signing NDA with VIA." =46rom my point of view, signing a NDA is not in the "FLOSS way". And most= =20 important, what can I, as a simple user, do with a datasheet which I can't= =20 give to the developper ? If some one have an idea, I'll be grateful. I should have my SE90 in a few days. Laurent
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