[PATCH] quirk for Pioneer DJ DJM-250MK2 usb sound card

[František Kučera]

Hello,

I have created a quirk that adds support for the Pioneer DJ DJM-250MK2 mixer (acts like a USB sound card, but Vendor Specific Class).

Output (from computer to card) is working: 8 channels, 48 000 Hz, S24_3LE.

Input is not working. I tried, but I was unable to make it working even under an officially supported OS with Pioneer drivers - Audacity or Mixxx see the channels, but there is no signal. It probably works only with Pioneer proprietary application. But I hope that even mere output support will be useful for someone. (it is usable for playback, just not for DVS)

Franta

Signed-off-by: František Kučera <franta-linux at frantovo.cz>
---
 sound/usb/quirks-table.h | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h
index d187aa6d50db..dcaf9eed9a41 100644
--- a/sound/usb/quirks-table.h
+++ b/sound/usb/quirks-table.h
@@ -3592,5 +3592,47 @@ AU0828_DEVICE(0x2040, 0x7270, "Hauppauge", "HVR-950Q"),
                }
        }
 },
+{
+       /*
+        * Pioneer DJ DJM-250MK2
+        * PCM is 8 channels out @ 48 fixed (endpoints 0x01).
+        * The output from computer to the mixer is usable.
+        *
+        * The input (phono or line to computer) is not working.
+        * It should be at endpoint 0x82 and probably also 8 channels,
+        * but it seems that it works only with Pioneer proprietary software.
+        * Even on officially supported OS, the Audacity was unable to record
+        * and Mixxx to recognize the control vinyls.
+        */
+       USB_DEVICE_VENDOR_SPEC(0x2b73, 0x0017),
+       .driver_info = (unsigned long) &(const struct snd_usb_audio_quirk) {
+               .ifnum = QUIRK_ANY_INTERFACE,
+               .type = QUIRK_COMPOSITE,
+               .data = (const struct snd_usb_audio_quirk[]) {
+                       {
+                               .ifnum = 0,
+                               .type = QUIRK_AUDIO_FIXED_ENDPOINT,
+                               .data = &(const struct audioformat) {
+                                       .formats = SNDRV_PCM_FMTBIT_S24_3LE,
+                                       .channels = 8, // outputs
+                                       .iface = 0,
+                                       .altsetting = 1,
+                                       .altset_idx = 1,
+                                       .endpoint = 0x01,
+                                       .ep_attr = USB_ENDPOINT_XFER_ISOC|
+                                               USB_ENDPOINT_SYNC_ASYNC,
+                                       .rates = SNDRV_PCM_RATE_48000,
+                                       .rate_min = 48000,
+                                       .rate_max = 48000,
+                                       .nr_rates = 1,
+                                       .rate_table = (unsigned int[]) { 48000 }
+                               }
+                       },
+                       {
+                               .ifnum = -1
+                       }
+               }
+       }
+},
 
 #undef USB_DEVICE_VENDOR_SPEC