Re: INT203 and DAC1 (Re: [PATCH] ALSA: dice: add stream format parameters for Weiss devices)

[Takashi Sakamoto <o-takashi@sakamocchi.jp>]

Hi Michele,

On Sat, Sep 16, 2023 at 11:18:39AM +0200, Michele Perrone wrote:
> Hi Takashi,
> 
> sorry for our late reply.
> 
> 1. INT203
> 
> Yes, we can confirm that the latest INT203 firmware has the model ID 0x6,
> same like the INT202. Older INT203 firmware has the model ID 0xa.
> 
> At the snd-dice module level, there is obviously no difference, because
> the hardcoded capabilities (modes/rates) are the same.
> 
> The only drawback is that when connecting the INT202, users see two
> channels of input. But maybe this could be easily solved with an alsa
> card profile.
> 
> 2. DAC1
> 
> The DAC1 with model ID 0x5 that you found in the libffado configuration
> file is not same the DAC1 that you found on our website.
> That was an experimental device which included an embedded computing
> board, connected via FireWire to an internal DICE-based soundcard.
> This device was never released to the market, so I suggest discarding
> this entry.
> 
> On the other hand, the DAC1 from our website was indeed sold with a
> FireWire option. However, this is just and INT203 embedded inside the
> DAC1, with no special ROM. This means that when connecting the DAC1 via
> FireWire, it will present itself like an INT203.
> 
> I hope this answers all your question, otherwise let us know!
> 
> Kind regards,
> Michele Perrone

Thanks for your clarification! Now I figured out and post merge request
to systemd project.

* https://github.com/systemd/systemd/pull/29197


Thanks

Takashi Sakamoto

> On 06/09/23 01:54, Takashi Sakamoto wrote:
> > Hi Rolf and Michele,
> > 
> > I'm working to fulfill hardware database of systemd project[1] for Weiss models with received
> > collection of configuration ROM, then have some issues. I would ask you to provide information
> > to solve them.
> > 
> > This is the table of the value of model ID field and model name.
> > 
> >                  snd-dice    am-config-roms  systemd hwdb
> > DAC202          0x000007    0x000007        0x000007
> > DAC202(Maya)    0x000008    not yet         not yet
> > MAN301          0x00000b    0x00000b        not yet
> > INT202          0x000006    0x000006        0x000006
> > INT203          0x00000a    0x000006 (?)    not yet
> > ADC2            0x000001    0x000001        0x000001
> > DAC2/Minerva    0x000003    0x000003        0x000003
> > Vesta           0x000002    0x000002        0x000002
> > AFI1            0x000004    0x000004        0x000004
> > DAC1            not yet (?) not yet (?)     0x000005
> > 
> > I have two issues.
> > 
> > 1. INT203
> > 
> > The modalias table in ALSA dice driver[2] includes 0x00000a for the model, while the configuration
> > ROM includes 0x000006. Michele wrote commit comment for it[3]:
> > 
> > ```
> > Note: the INT203 presents itself as INT202, because the firmware
> >        running on the two devices is the same.
> >        The difference between the two lies in a jumper setting
> >        inside the device.
> > ```
> > 
> > In my opinion, there are multiple hardawre revisions for the model.
> > 
> > 2. DAC1
> > 
> > When committing to hardware database of systemd project[4], I referred to libffado2 configuration
> > file[5]. It includes `DAC1` with model ID 0x000005, while it is neither found in ALSA dice driver
> > nor the collection of configuration ROM. As long as searching DAC1 in website of Weiss Engineering,
> > I can see DAC1-mk3 has option card for IEEE 1394 connection[6]. Would I request you to provide
> > information about the model?
> > 
> > [1] `hwdb.d/80-ieee1394-unit-function.hwdb` in systemd project
> > [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/sound/firewire/dice/dice.c?id=4fb0dacb78c6a041bbd38ddd998df806af5c2c69#n395
> > [3] https://github.com/takaswie/am-config-roms/commit/e6717b3cbb4a
> > [4] https://github.com/systemd/systemd/commit/ff1cb7b9393ac
> > [5] http://subversion.ffado.org/browser/trunk/libffado/configuration
> > [6] https://weiss.ch/products/pro-audio/dac1-mk3/
> > 
> > 
> > Regards
> > 
> > Takashi Sakamoto