Date: Wed, 30 Jun 2004 22:48:46 +0900 From: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp> To: Buzz Slye <buzz@gaia.arc.nasa.gov> Cc: freebsd-firewire@freebsd.org Subject: Re: userland fix Message-ID: <87wu1p17i9.wl@tora.nunu.org> In-Reply-To: <Pine.GSO.4.58.0406241006550.7558@erast1.arc.nasa.gov> References: <Pine.GSO.4.58.0406241006550.7558@erast1.arc.nasa.gov>
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Sorry for my late response. At Thu, 24 Jun 2004 10:09:09 -0700 (PDT), Buzz Slye wrote: > > The following code may be substituted for the broken code in fwdev.c, line 325 > (in the routine fw_read) to allow downloading of digital camera images. Do you mean not Digital Video but Digital Camera protocol? > #if 1 /* XXX fixed ? */ > /* per packet mode or FWACT_CH bind?*/ > s = splfw(); > ir->queued --; > STAILQ_REMOVE_HEAD(&ir->q, link); > splx(s); > fp = &xfer->recv.hdr; > if (sc->fc->irx_post != NULL) > sc->fc->irx_post(sc->fc, fp->mode.ld); > err = uiomove((caddr_t)fp, sizeof(struct fw_isohdr), uio); > err = uiomove((caddr_t)xfer->recv.payload, xfer->recv.pay_len, uio); > #endif I cannot remember in which case these code are executed. What kind of userland program do you use? I think that bulkxfer is used for DV receive. Are you going to implement Digital Camera specification? > Changing the receive channel, however, results in the message: > > fwohci0: IR DMA no free chunk This indicates that there is no receive buffer available. > Is changing channels not supported? After the above message, the code > returns 0. So maybe this message is not really an error. I think it's not supported and you may need to close/reopen the device. /\ 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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