1 files changed, 32 insertions, 0 deletions

diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index 627de9525a32..d32d83d970cc 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -3096,6 +3096,32 @@ static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
 }
 
 /*
+ * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
+ * documented in the device's data sheet.
+ */
+static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value)
+{
+        u8 buf[4];
+        buf[0] = 0x20;
+        buf[1] = value & 0xff;
+        buf[2] = (value >> 8) & 0xff;
+        buf[3] = reg;
+        return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION,
+                               USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
+                               0, 0, &buf, 4, 1000);
+}
+
+static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
+{
+        /*
+         * Enable line-out driver mode, set headphone source to front
+         * channels, enable stereo mic.
+         */
+        return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
+}
+
+
+/*
  * Setup quirks
  */
 #define AUDIOPHILE_SET                  0x01 /* if set, parse device_setup */
@@ -3365,6 +3391,12 @@ static void *snd_usb_audio_probe(struct usb_device *dev,
                         goto __err_val;
         }
 
+        /* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
+        if (id == USB_ID(0x10f5, 0x0200)) {
+                if (snd_usb_cm106_boot_quirk(dev) < 0)
+                        goto __err_val;
+        }
+
         /*
          * found a config.  now register to ALSA
          */