echoplayer: add echoplayer-specific codec header

Remove the generic TLV320AIC3104 codec header. The codec
is sufficiently complex that a one-size-fits-all driver
isn't really feasible, eg. due to different clocking and
output configurations.

It's easier for targets to have their own audio headers
tailored to their use case than a generic header with
lots of ifdefs.

Change-Id: I63d92d57c28ddd7da7aa3174bd583d8afb1aa56d

firmware/export/audiohw.h

@@ -241,8 +241,8 @@ struct sound_settings_info
 #include "fiiolinux_codec.h"
 #elif defined(HAVE_EROSQ_LINUX_CODEC)
 #include "erosqlinux_codec.h"
-#elif defined(HAVE_TLV320AIC3104)
-#include "tlv320aic3104_codec.h"
+#elif defined(HAVE_ECHOPLAYER_CODEC)
+#include "echoplayer_codec.h"
 #elif defined(HAVE_HIBY_LINUX_CODEC)
 #include "hibylinux_codec.h"
 #endif

firmware/export/config/echor1.h

@@ -54,7 +54,7 @@
 #define INPUT_SRC_CAPS  SRC_CAP_MIC
 #define AUDIOHW_CAPS    MIC_GAIN_CAP
 #define HAVE_RECORDING
-#define HAVE_TLV320AIC3104 // TODO: Sansa connect uses the AIC3106, possible code sharing?
+#define HAVE_ECHOPLAYER_CODEC
 #define HAVE_SW_TONE_CONTROLS
 #define HAVE_SW_VOLUME_CONTROL
 #define DEFAULT_REC_MIC_GAIN  12

firmware/export/echoplayer_codec.h

@@ -18,12 +18,14 @@
  * KIND, either express or implied.
  *
  ****************************************************************************/
+#ifndef __ECHOPLAYER_CODEC_H__
+#define __ECHOPLAYER_CODEC_H__
 
-#ifndef __TLV320AIC3104_CODEC__
-#define __TLV320AIC3104_CODEC__
+/* -79 to 0 dB in 0.5 dB steps; software volume control
+ * is used because the hardware volume controls "click"
+ * when changing the volume */
+AUDIOHW_SETTING(VOLUME, "dB", 1, 5, -790, 0, -200);
 
-// FIXME: range
-AUDIOHW_SETTING(VOLUME, "dB", 0,  2, -74, -2, -40)
-AUDIOHW_SETTING(MIC_GAIN, "dB", 0, 1, 0, 63, 12)
+AUDIOHW_SETTING(MIC_GAIN, "dB", 0, 1, 0, 63, 12);
 
-#endif /* __TLV320AIC3104_CODEC__ */
+#endif /* __ECHOPLAYER_CODEC_H__ */