[ALSA] usb-audio - enable high speed (not) on Audigy 2 NX

USB generic driver
The SB Audigy 2 NX needs a special boot-up command before it works in
high speed mode.

However, we don't actually enable it yet because high speed
synchronization doesn't seem to work with this device.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

1 files changed, 24 insertions, 0 deletions

diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index da1fe0f0bca..34d5f58985b 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -2925,6 +2925,25 @@ static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interfac
         return 0;
 }
 
+static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
+{
+#if 0
+        /* TODO: enable this when high speed synchronization actually works */
+        u8 buf = 1;
+
+        snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
+                        USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
+                        0, 0, &buf, 1, 1000);
+        if (buf == 0) {
+                snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
+                                USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
+                                1, 2000, NULL, 0, 1000);
+                return -ENODEV;
+        }
+#endif
+        return 0;
+}
+
 
 /*
  * audio-interface quirks
@@ -3154,6 +3173,11 @@ static void *snd_usb_audio_probe(struct usb_device *dev,
                         goto __err_val;
                 config = dev->actconfig;
         }
+        /* SB Audigy 2 NX needs its own boot-up magic, too */
+        if (id == USB_ID(0x041e, 0x3020)) {
+                if (snd_usb_audigy2nx_boot_quirk(dev) < 0)
+                        goto __err_val;
+        }
 
         /*
          * found a config.  now register to ALSA