[LAD] Support for Steinberg UR22 (Yamaha USB chipset 0499:1509)?

Clemens Koller clemens.koller at embeon.de
Fri Apr 4 21:48:06 UTC 2014

Hi, Christian!

I also own this device. Linux / kernel 3.13.8 is still lacking proper
support (the patch + x) for it. No audio device comes up.

I did some reverse engineering just to find out that it's an
proprietary Yamaha SSP2 DSP inside which has YC706A0 SSP2 on his
number plate. This is very likely a NEC (now Renesas) based design.
I even found the Pinout of a Chip like this (which is also referenced as
uPD800500F1-11-KN), but there is no hardware/software reference
manual available - shame on Steinberg! This thing could also be
fed with firmware which might be extracted from the Windows drivers

Let me know when you want me to test something for you.


On 04/04/2014 09:56 PM, covux wrote:
> Hello,
> first thanks for the quirks-table.h patch.
> I got it working with some restrictions under 3.13/3.14 vanilla kernel.
> The card works fine, after disabling USB 3.0 (Lenovo T440s).
> I can set samplerates up to 192khz with 512 Frames
> using jack.
> With USB 3.0 i can only set samplerates up to 48khz 
> and get multiple errormessages like:
> [   18.950994] 6:2:1: cannot get freq at ep 0x86
> [  142.670841] retire_capture_urb: 911 callbacks suppressed
> After a while the card stops working and jack crashes.
> I would really like to help, making full linux support for this device
> happen.
> I can provide more info if needed.
> Cheers,
> Christian
> --
> View this message in context: http://linux-audio.4202.n7.nabble.com/Support-for-Steinberg-UR22-Yamaha-USB-chipset-0499-1509-tp82888p90340.html
> Sent from the linux-audio-dev mailing list archive at Nabble.com.
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