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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 by Michael Sevakis
*
* 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 "system.h"
#include "cpu.h"
#include "audio.h"
#include "sound.h"
#include "general.h"
int audio_channels = 2;
int audio_output_source = AUDIO_SRC_PLAYBACK;
void audio_set_output_source(int source)
{
int oldmode = set_fiq_status(FIQ_DISABLED);
if ((unsigned)source >= AUDIO_NUM_SOURCES)
source = AUDIO_SRC_PLAYBACK;
audio_output_source = source;
if (source != AUDIO_SRC_PLAYBACK)
IISCONFIG |= (1 << 29);
set_fiq_status(oldmode);
} /* audio_set_output_source */
void audio_input_mux(int source, unsigned flags)
{
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:
audio_channels = 2;
if (source != last_source)
{
audiohw_set_monitor(false);
audiohw_disable_recording();
}
break;
case AUDIO_SRC_MIC: /* recording only */
audio_channels = 1;
if (source != last_source)
{
audiohw_set_monitor(false);
audiohw_enable_recording(true); /* source mic */
}
break;
case AUDIO_SRC_FMRADIO: /* recording and playback */
audio_channels = 2;
if (source == last_source && recording == last_recording)
break;
last_recording = recording;
if (recording)
{
audiohw_set_monitor(false);
audiohw_enable_recording(false);
}
else
{
audiohw_disable_recording();
audiohw_set_monitor(true); /* line 1 analog audio path */
}
break;
} /* end switch */
last_source = source;
} /* audio_input_mux */
void audiohw_set_sampr_dividers(int fsel)
{
/* Seems to predivide 24MHz by 2 for a source clock of 12MHz. Maybe
* there's a way to set that? */
static const struct
{
unsigned char iisclk;
unsigned char iisdiv;
} regvals[HW_NUM_FREQ] =
{
/* 8kHz - 24kHz work well but there seems to be a minor crackling
* issue for playback at times and all possibilities were checked
* for the divisors without any positive change.
* 32kHz - 48kHz seem fine all around. */
#if 0
[HW_FREQ_8] = /* CLK / 1500 (8000Hz) */
{
.iisclk = 24,
.iisdiv = 59,
},
[HW_FREQ_11] = /* CLK / 1088 (~11029.41Hz) */
{
.iisclk = 33,
.iisdiv = 31,
},
[HW_FREQ_12] = /* CLK / 1000 (120000Hz) */
{
.iisclk = 49,
.iisdiv = 19,
},
[HW_FREQ_16] = /* CLK / 750 (16000Hz) */
{
.iisclk = 24,
.iisdiv = 29,
},
[HW_FREQ_22] = /* CLK / 544 (~22058.82Hz) */
{
.iisclk = 33,
.iisdiv = 15,
},
[HW_FREQ_24] = /* CLK / 500 (24000Hz) */
{
.iisclk = 49,
.iisdiv = 9,
},
#endif
[HW_FREQ_32] = /* CLK / 375 (32000Hz) */
{
.iisclk = 24,
.iisdiv = 14,
},
[HW_FREQ_44] = /* CLK / 272 (~44117.68Hz) */
{
.iisclk = 33,
.iisdiv = 7,
},
[HW_FREQ_48] = /* CLK / 250 (48000Hz) */
{
.iisclk = 49,
.iisdiv = 4,
},
/* going a bit higher would be nice to get 64kHz play, 32kHz rec, but a
* close enough division isn't obtainable unless CLK can be changed */
};
IISCLK = (IISCLK & ~0x17ff) | regvals[fsel].iisclk;
IISDIV = (IISDIV & ~0xc000003f) | regvals[fsel].iisdiv;
}
unsigned int pcm_sampr_type_rec_to_play(unsigned int samplerate)
{
/* Check if the samplerate is in the list of recordable rates.
* Fail to default if not */
int index = round_value_to_list32(samplerate, rec_freq_sampr,
REC_NUM_FREQ, false);
if (samplerate != rec_freq_sampr[index])
return HW_SAMPR_DEFAULT;
return samplerate * 2; /* Recording rates are 1/2 the codec clock */
}
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