On Tue, 24 Apr 2018 15:24:32 +0200, Takashi Sakamoto wrote: > > In early stage of firmware SDK, DICE seems to lose its backward > compatibility due to some registers on global address section. I found > this with Alesis Multimix 12 FireWire with ancient firmware (approx. > shipped version). > > According to retrieved log from the unit, global section has 96 byte > space. On the other hand, current version of ALSA dice driver assumes > that all of supported unit has at least 100 byte space. > > $ ./firewire-request /dev/fw1 read 0xffffe0000000 28 > result: 000: 00 00 00 0a 00 00 00 18 00 00 00 22 00 00 00 8a > result: 010: 00 00 00 ac 00 00 01 12 00 00 00 00 00 00 00 00 > result: 020: 00 00 00 00 00 00 00 00 > > This commit adds support for the ancient firmware. Check of global section > is loosened to accept the smaller space. The lack of information is > already compensated by hard-coded parameters. > > I experienced that the latest version of Windows driver for this model > can't handle this unit, too. This means that TCAT releases firmware SDK > without backward compatibility for the ancient firmware. > > Below list is a early history of driver/firmware package released by > Alesis. I investigated on wayback machine on Internet Archive: > * Unknown: PAL v1.0.41.2, firmware v1.0.3 > * Mar 2006: PAL v1.54.0, firmware v1.0.4 > * Dec 2006: PAL v2.0.0.2, firmware v2.0 > * Jun 2007: PAL v3.0.41.5, firmware v2.0 > * Jul 2007: PAL v3.0.56.2. firmware v2.0 > * Jan 2008: PAL v3.0.81.1080, firmware v2.0 > > If I can assume that firmware version is the same as DICE version, DICE > version for the issued firmware may be v1.0.3. According to code base of > userspace driver project (FFADO), I can read DICE v1.0.4 supports global > space larger than 100 byte. I guess the smaller space of global section is > a feature of DICE v1.0.3. > > Signed-off-by: Takashi Sakamoto <o-takashi@xxxxxxxxxxxxx> Applied now, thanks. Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
