diff --git a/firmware/export/config-iaudiox5.h b/firmware/export/config-iaudiox5.h
index 1a95a5202c..7cdc861435 100644
--- a/firmware/export/config-iaudiox5.h
+++ b/firmware/export/config-iaudiox5.h
@@ -47,6 +47,8 @@
 
 #define CONFIG_I2C I2C_IAUDIO
 
+#define HAVE_TLV320
+
 /* Define this if the platform can charge batteries */
 #define HAVE_CHARGING 1
 
diff --git a/firmware/export/tlv320.h b/firmware/export/tlv320.h
new file mode 100644
index 0000000000..6287ee3bcc
--- /dev/null
+++ b/firmware/export/tlv320.h
@@ -0,0 +1,117 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2005 by Christian Gmeiner
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#ifndef _TLV320_H_
+#define _TLV320_H_
+
+/*** definitions ***/
+
+extern void tlv320_reset(void);
+extern int tlv320_init(void);
+extern int tlv320_set_headphone_vol(int vol_l, int vol_r);
+extern int tlv320_mute(bool mute);
+
+#define HEADPHONE_MUTE 0x30 /* 0110000 = -73db */
+
+/* ToDo: samplerates */
+
+/* registers */
+/* REG_LLIV: Left line input channel volume control */
+#define REG_LLIV        0x0
+#define LLIV_LRS        (0 << 8)    /* simultaneous volume/mute update */
+#define LIM             (1 << 7)    /* Left line input mute */
+#define LIV             ((x) & 0x1f)/* Left line input volume control */
+
+/* REG_RLIV: Right line input channel volume control */
+#define REG_RLIV        0x1
+#define RLIV_RLS        (0 << 8)    /* simultaneous volume/mute update */
+#define RLIV_RIM        (0 << 7)    /* Right line input mute */
+#define RLIV_LIV        ((x) & 0x1f)/* Right line input volume control */
+
+/* REG_LHV: Left Channel Headphone Volume Control */
+#define REG_LHV         0x2
+#define LHV_LRS         (0 << 8)    /* simultaneous volume/mute update */
+#define LHV_LZC         (0 << 7)	/* Left-channel zero-cross detect */
+#define LHV_LHV         ((x) & 0x1f)/* Left headphone volume control */
+
+/* REG_RHV: Right Channel Headphone Volume Control */
+#define REG_RHV         0x3
+#define RHV_LRS         (0 << 8)    /* simultaneous volume/mute update */
+#define RHV_RZC         (0 << 7)    /* Right-channel zero-cross detect */
+#define RHV_LHV         ((x) & 0x1f)/* Right headphone volume control */
+
+/* REG_AAP: Analog Audio Path Control */
+#define REG_AAP         0x4
+#define AAP_DAC         (1 << 4)    /* DAC select           */
+#define AAP_BYPASS      (1 << 3)    /* bypass               */
+#define AAP_INSEL       (0 << 2)    /* Input select for ADC */
+#define AAP_MICM        (1 << 1)    /* Microphone mute      */
+#define AAP_MICB        (1 << 0)    /* Microphone boost     */
+
+/* REG_DAP: Digital Audio Path Control */
+#define REG_DAP         0x5
+#define DAP_DACM        (1 << 3)    /* DAC soft mute                    */
+#define DAP_DEEMP_DIS   (0 << 1)    /* De-emphasis control: disabled    */
+#define DAP_DEEMP_32    (1 << 1)    /* De-emphasis control: 32 kHz      */
+#define DAP_DEEMP_44    (2 << 1)    /* De-emphasis control: 44.1 kHz    */
+#define DAP_DEEMP_48    (3 << 1)    /* De-emphasis control: 48 kHz      */
+#define DAP_ADCHP       (0 << 0)    /* ADC high-pass filter             */
+
+/* REG_PC: Power Down Control */
+#define REG_PC          0x6
+#define PC_OFF          (0 << 7)    /* Device power     */
+#define PC_CLK          (0 << 6)    /* Clock            */
+#define PC_OSC          (0 << 5)    /* Oscillator       */
+#define PC_OUT          (0 << 4)    /* Outputs          */
+#define PC_DAC          (0 << 3)    /* DAC              */
+#define PC_ADC          (0 << 2)    /* ADC              */
+#define PC_MIC          (0 << 1)    /* Microphone input */
+#define PC_LINE         (0 << 0)    /* Line input       */
+                                
+/* REG_DAIF: Digital Audio Interface Format */
+#define REG_DAIF        0x7
+#define DAIF_MS         (1 << 6)    /* Master/slave mode                        */
+#define DAIF_LRSWAP     (1 << 5)    /* DAC left/right swap                      */
+#define DAIF_LRP        (0 << 4)    /* DAC left/right phase                     */
+#define DAIF_IWL_16     (0 << 2)    /* Input bit length: 16 bit                 */
+#define DAIF_IWL_20     (1 << 2)    /* Input bit length: 20 bit                 */
+#define DAIF_IWL_24     (2 << 2)    /* Input bit length: 24 bit                 */
+#define DAIF_IWL_32     (3 << 2)    /* Input bit length: 32 bit                 */
+#define DAIF_FOR_DSP    (3 << 0)    /* Data format: DSP                         */
+#define DAIF_FOR_I2S    (2 << 0)    /* Data format: I2S                         */
+#define DAIF_FOR_MSBL   (1 << 0)    /* Data format: MSB first, left aligned     */
+#define DAIF_FOR_MSBR   (0 << 0)    /* Data format: MSB first, right aligned    */
+
+/* REG_SRC: Sample Rate Control */
+#define REG_SRC         0x8
+#define SRC_CLKIN       (0 << 6)    /* Clock input divider */ 
+#define SRC_CLKOUT      (0 << 7)    /* Clock output divider */
+/*#define SRC_SR        ()*/
+#define SRC_BOSR        (1 << 1)    /* Base oversampling rate, depends on SRC_USB */
+#define SRC_USB         (1 << 0)    /* Clock mode select */
+
+/* REG_DIA: Digital Interface Activation */
+#define REG_DIA         0x9
+#define DIA_ACT         (1 << 6)    /* Activate interface */
+
+/* REG_RR: Reset Register */
+#define REG_RR          0xf
+#define RR_RESET        0           /* Reset */
+
+#endif /*_TLV320_H_*/