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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2021 Aidan MacDonald
*
* 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 "audiohw.h"
#include "system.h"
#include "pcm_sampr.h"
#include "logf.h"
#include "aic-x1000.h"
#include "i2c-x1000.h"
#include "gpio-x1000.h"
void audiohw_init(void)
{
/* Configure AIC */
aic_set_external_codec(true);
aic_set_i2s_mode(AIC_I2S_MASTER_MODE);
aic_enable_i2s_master_clock(true);
/* Initialize DAC */
i2c_x1000_set_freq(AK4376_BUS, I2C_FREQ_400K);
ak4376_init();
}
void audiohw_postinit(void)
{
}
void audiohw_close(void)
{
ak4376_close();
}
void ak4376_set_pdn_pin(int level)
{
gpio_config(GPIO_A, 1 << 16, GPIO_OUTPUT(level ? 1 : 0));
}
int ak4376_set_mclk_freq(int hw_freq, bool enabled)
{
int freq = hw_freq_sampr[hw_freq];
int mult = freq >= SAMPR_176 ? 128 : 256;
if(enabled) {
if(aic_set_i2s_clock(X1000_CLK_SCLK_A, freq, mult)) {
logf("WARNING: unachievable audio rate %d x %d!?", freq, mult);
}
}
aic_enable_i2s_bit_clock(enabled);
return mult;
}
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