Date: Wed, 20 Aug 2003 09:31:40 +0900 From: Katsushi Kobayashi <ikob@koganei.wide.ad.jp> To: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp> Cc: freebsd-firewire@freebsd.org Subject: Re: OHCI 1.2 Message-ID: <AAC14CD0-D2A5-11D7-941C-0030657D3460@koganei.wide.ad.jp> In-Reply-To: <ybs1xvhjin1.wl@ett.sat.t.u-tokyo.ac.jp>
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Hi, I don't have any information for OHCI1.2. In my previous experience, some OHCI chip set does not work when not zeroing undefined register field. I thought this kind of issue is "sometimes" led by the difference of implementation, not by the specification. I have quick reviewed TSB82AA2 technical document published by TI. The document re-iterates the OHCI information, not only describes TI specific issues. On Wednesday, August 20, 2003, at 09:08 AM, Hidetoshi Shimokawa wrote: > At Wed, 20 Aug 2003 01:56:26 +0900, > Katsushi Kobayashi wrote: >> >> What chipset is your target ? >> >> I am not sure whether OHCI2.0 is ready or not. >> >> For example, TI's 1394b link layer controller (TSB82AA2) has some >> special >> registers the extension of OHCI1.1. TI called it as OHCI1.1+. >> >> Thanks, > > Yes, the target is TSB82AA2. The OHCI1.2 is listed as reference in its > datasheet(1.3 Related Documents). It seems that there are some > extenstions(*1) in stream packet format in OHCI1.1+/1.2 rather than > registers. As you know, OHCI packet format is somewhat different from > 1394 packet format. > > Do you have any information about difference between 1.1 and 1.1+ or > 1.2? > > (*) I observed some strange behavior if we don't fill reserved field > with zero. > >> >> On 2003.Aug.20, at 12:37 AM, Hidetoshi Shimokawa wrote: >> >>> Does anyone know where I can get the 1394 OHCI 1.2 specification? >>> >>> 1394b chips seems to use some fields reserved in OHCI1.1. >>> > > /\ Hidetoshi Shimokawa > \/ simokawa@sat.t.u-tokyo.ac.jp > PGP public key: http://www.sat.t.u-tokyo.ac.jp/~simokawa/pgp.html
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