1 files changed, 68 insertions, 0 deletions

diff --git a/firmware/target/hosted/ibasso/dx50/audiohw-dx50.c b/firmware/target/hosted/ibasso/dx50/audiohw-dx50.c
new file mode 100644
index 0000000000..5e61348c8d
--- /dev/null
+++ b/firmware/target/hosted/ibasso/dx50/audiohw-dx50.c
@@ -0,0 +1,68 @@
+/***************************************************************************
+ *             __________               __   ___
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ * Copyright (C) 2014 by Ilia Sergachev: Initial Rockbox port to iBasso DX50
+ * Copyright (C) 2014 by Mario Basister: iBasso DX90 port
+ * Copyright (C) 2014 by Simon Rothen: Initial Rockbox repository submission, additional features
+ * Copyright (C) 2014 by Udo Schläpfer: Code clean up, additional features
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+
+#include "config.h"
+#include "debug.h"
+
+#include "debug-ibasso.h"
+#include "sysfs-ibasso.h"
+
+
+extern void set_software_volume(void);
+
+
+void audiohw_set_volume(int volume)
+{
+    set_software_volume();
+
+    /*
+        See codec-dx50.h.
+        -128db        -> -1 (adjusted to 0, mute)
+        -127dB to 0dB ->  1 to 255 in steps of 2
+        volume is in centibels (tenth-decibels).
+    */
+    int volume_adjusted = (volume / 10) * 2 + 255;
+
+    DEBUGF("DEBUG %s: volume: %d, volume_adjusted: %d.", __func__, volume, volume_adjusted);
+
+    if(volume_adjusted > 255)
+    {
+        DEBUGF("DEBUG %s: Adjusting volume from %d to 255.", __func__, volume);
+        volume_adjusted = 255;
+    }
+    if(volume_adjusted < 0)
+    {
+        DEBUGF("DEBUG %s: Adjusting volume from %d to 0.", __func__, volume);
+        volume_adjusted = 0;
+    }
+
+    /*
+        /dev/codec_volume
+        0 ... 255
+    */
+    if(! sysfs_set_int(SYSFS_DX50_CODEC_VOLUME, volume_adjusted))
+    {
+        DEBUGF("ERROR %s: Can not set volume.", __func__);
+    }
+}