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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Michael Sevakis
*
* 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.
*
****************************************************************************/
#include "system.h"
#include "cpu.h"
#include "audio.h"
#include "tlv320.h"
/**
* Note that microphone is mono, only left value is used
* See tlv320_set_recvol() for exact ranges.
*
* @param type AUDIO_GAIN_MIC, AUDIO_GAIN_LINEIN
*
*/
void audio_set_recording_gain(int left, int right, int type)
{
//logf("rcmrec: t=%d l=%d r=%d", type, left, right);
tlv320_set_recvol(left, right, type);
} /* audio_set_recording_gain */
void audio_set_output_source(int source)
{
unsigned long txsrc;
if ((unsigned)source >= AUDIO_NUM_SOURCES)
txsrc = (3 << 8); /* playback, PDOR3 */
else
txsrc = (4 << 8); /* recording, iis1RcvData */
IIS1CONFIG = (IIS1CONFIG & ~(7 << 8)) | txsrc;
} /* audio_set_output_source */
void audio_set_source(int source, unsigned flags)
{
/* Prevent pops from unneeded switching */
static int last_source = AUDIO_SRC_PLAYBACK;
static bool last_recording = false;
bool recording = flags & SRCF_RECORDING;
switch (source)
{
default: /* playback - no recording */
source = AUDIO_SRC_PLAYBACK;
case AUDIO_SRC_PLAYBACK:
if (source != last_source)
{
tlv320_disable_recording();
tlv320_set_monitor(false);
/* Reset PDIR2 data flow */
DATAINCONTROL = (1 << 9);
}
break;
case AUDIO_SRC_MIC: /* recording only */
if (source != last_source)
{
tlv320_enable_recording(true); /* source mic */
/* Int. when 6 samples in FIFO, PDIR2 src = iis1RcvData */
DATAINCONTROL = (3 << 14) | (4 << 3);
}
break;
case AUDIO_SRC_LINEIN: /* recording only */
if (source != last_source)
{
tlv320_enable_recording(false); /* source line */
/* Int. when 6 samples in FIFO, PDIR2 src = iis1RcvData */
DATAINCONTROL = (3 << 14) | (4 << 3);
}
break;
case AUDIO_SRC_FMRADIO: /* recording and playback */
if (!recording)
tlv320_set_recvol(23, 23, AUDIO_GAIN_LINEIN);
/* I2S recording and analog playback */
if (source == last_source && recording == last_recording)
break;
last_recording = recording;
if (recording)
{
/* Int. when 6 samples in FIFO, PDIR2 src = iis1RcvData */
DATAINCONTROL = (3 << 14) | (4 << 3);
tlv320_enable_recording(false); /* source line */
}
else
{
tlv320_disable_recording();
tlv320_set_monitor(true); /* analog bypass */
/* Reset PDIR2 data flow */
DATAINCONTROL = (1 << 9);
}
break;
} /* end switch */
/* set line multiplexer */
if (source == AUDIO_SRC_FMRADIO)
and_l(~(1 << 29), &GPIO_OUT); /* FM radio */
else
or_l((1 << 29), &GPIO_OUT); /* Line In */
or_l((1 << 29), &GPIO_ENABLE);
or_l((1 << 29), &GPIO_FUNCTION);
last_source = source;
} /* audio_set_source */
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