127 lines
4.1 KiB
C
127 lines
4.1 KiB
C
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2006 by Michael Sevakis
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "system.h"
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#include "cpu.h"
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#include "audio.h"
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#include "tlv320.h"
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/**
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* Note that microphone is mono, only left value is used
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* See tlv320_set_recvol() for exact ranges.
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*
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* @param type 0=line-in (radio), 1=mic
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*
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*/
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void audio_set_recording_gain(int left, int right, int type)
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{
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//logf("rcmrec: t=%d l=%d r=%d", type, left, right);
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tlv320_set_recvol(left, right, type);
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} /* audio_set_recording_gain */
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void audio_set_output_source(int source)
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{
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unsigned long txsrc;
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if ((unsigned)source >= AUDIO_NUM_SOURCES)
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txsrc = (3 << 8); /* playback, PDOR3 */
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else
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txsrc = (4 << 8); /* recording, iis1RcvData */
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IIS1CONFIG = (IIS1CONFIG & ~(7 << 8)) | txsrc;
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} /* audio_set_output_source */
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void audio_set_source(int source, unsigned flags)
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{
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/* Prevent pops from unneeded switching */
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static int last_source = AUDIO_SRC_PLAYBACK;
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static bool last_recording = false;
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bool recording = flags & SRCF_RECORDING;
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switch (source)
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{
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default: /* playback - no recording */
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source = AUDIO_SRC_PLAYBACK;
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case AUDIO_SRC_PLAYBACK:
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if (source != last_source)
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{
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tlv320_disable_recording();
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tlv320_set_monitor(false);
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/* Reset PDIR2 data flow */
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DATAINCONTROL = (1 << 9);
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}
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break;
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case AUDIO_SRC_MIC: /* recording only */
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if (source != last_source)
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{
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tlv320_enable_recording(true); /* source mic */
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/* Int. when 6 samples in FIFO, PDIR2 src = iis1RcvData */
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DATAINCONTROL = (3 << 14) | (4 << 3);
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}
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break;
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case AUDIO_SRC_LINEIN: /* recording only */
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if (source != last_source)
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{
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tlv320_enable_recording(false); /* source line */
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/* Int. when 6 samples in FIFO, PDIR2 src = iis1RcvData */
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DATAINCONTROL = (3 << 14) | (4 << 3);
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}
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break;
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case AUDIO_SRC_FMRADIO: /* recording and playback */
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if (!recording)
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tlv320_set_recvol(23, 23, AUDIO_GAIN_LINEIN);
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/* I2S recording and analog playback */
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if (source == last_source && recording == last_recording)
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break;
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last_recording = recording;
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if (recording)
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{
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/* Int. when 6 samples in FIFO, PDIR2 src = iis1RcvData */
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DATAINCONTROL = (3 << 14) | (4 << 3);
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tlv320_enable_recording(false); /* source line */
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}
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else
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{
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tlv320_disable_recording();
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tlv320_set_monitor(true); /* analog bypass */
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/* Reset PDIR2 data flow */
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DATAINCONTROL = (1 << 9);
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}
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break;
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} /* end switch */
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/* set line multiplexer */
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if (source == AUDIO_SRC_FMRADIO)
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and_l(~(1 << 29), &GPIO_OUT); /* FM radio */
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else
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or_l((1 << 29), &GPIO_OUT); /* Line In */
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or_l((1 << 29), &GPIO_ENABLE);
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or_l((1 << 29), &GPIO_FUNCTION);
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last_source = source;
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} /* audio_set_source */
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