1 files changed, 45 insertions, 11 deletions

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index e314cdb85003..355759bad581 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -425,6 +425,34 @@ static int snd_usb_accessmusic_boot_quirk(struct usb_device *dev)
 }
 
 /*
+ * Some sound cards from Native Instruments are in fact compliant to the USB
+ * audio standard of version 2 and other approved USB standards, even though
+ * they come up as vendor-specific device when first connected.
+ *
+ * However, they can be told to come up with a new set of descriptors
+ * upon their next enumeration, and the interfaces announced by the new
+ * descriptors will then be handled by the kernel's class drivers. As the
+ * product ID will also change, no further checks are required.
+ */
+
+static int snd_usb_nativeinstruments_boot_quirk(struct usb_device *dev)
+{
+        int ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+                                  0xaf, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+                                  cpu_to_le16(1), 0, NULL, 0, 1000);
+
+        if (ret < 0)
+                return ret;
+
+        usb_reset_device(dev);
+
+        /* return -EAGAIN, so the creation of an audio interface for this
+         * temporary device is aborted. The device will reconnect with a
+         * new product ID */
+        return -EAGAIN;
+}
+
+/*
  * Setup quirks
  */
 #define AUDIOPHILE_SET                  0x01 /* if set, parse device_setup */
@@ -489,27 +517,33 @@ int snd_usb_apply_boot_quirk(struct usb_device *dev,
         u32 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
                         le16_to_cpu(dev->descriptor.idProduct));
 
-        /* SB Extigy needs special boot-up sequence */
-        /* if more models come, this will go to the quirk list. */
-        if (id == USB_ID(0x041e, 0x3000))
+        switch (id) {
+        case USB_ID(0x041e, 0x3000):
+                /* SB Extigy needs special boot-up sequence */
+                /* if more models come, this will go to the quirk list. */
                 return snd_usb_extigy_boot_quirk(dev, intf);
 
-        /* SB Audigy 2 NX needs its own boot-up magic, too */
-        if (id == USB_ID(0x041e, 0x3020))
+        case USB_ID(0x041e, 0x3020):
+                /* SB Audigy 2 NX needs its own boot-up magic, too */
                 return snd_usb_audigy2nx_boot_quirk(dev);
 
-        /* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
-        if (id == USB_ID(0x10f5, 0x0200))
+        case USB_ID(0x10f5, 0x0200):
+                /* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
                 return snd_usb_cm106_boot_quirk(dev);
 
-        /* C-Media CM6206 / CM106-Like Sound Device */
-        if (id == USB_ID(0x0d8c, 0x0102))
+        case USB_ID(0x0d8c, 0x0102):
+                /* C-Media CM6206 / CM106-Like Sound Device */
                 return snd_usb_cm6206_boot_quirk(dev);
 
-        /* Access Music VirusTI Desktop */
-        if (id == USB_ID(0x133e, 0x0815))
+        case USB_ID(0x133e, 0x0815):
+                /* Access Music VirusTI Desktop */
                 return snd_usb_accessmusic_boot_quirk(dev);
 
+        case USB_ID(0x17cc, 0x1010): /* Traktor Audio 6 */
+        case USB_ID(0x17cc, 0x1020): /* Traktor Audio 10 */
+                return snd_usb_nativeinstruments_boot_quirk(dev);
+        }
+
         return 0;
 }