81 lines
2.3 KiB
C
81 lines
2.3 KiB
C
/***************************************************************************
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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) 2021 Aidan MacDonald
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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 "audiohw.h"
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#include "system.h"
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#include "pcm_sampr.h"
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#include "logf.h"
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#include "aic-x1000.h"
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#include "i2c-x1000.h"
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#include "gpio-x1000.h"
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#include "x1000/aic.h"
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#include "x1000/cpm.h"
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void audiohw_init(void)
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{
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/* Configure AIC for I2S operation */
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jz_writef(CPM_CLKGR, AIC(0));
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gpio_config(GPIO_B, 0x1f, GPIO_DEVICE(1));
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jz_writef(AIC_I2SCR, STPBK(1));
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/* Operate as I2S master, use external codec */
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jz_writef(AIC_CFG, AUSEL(1), ICDC(0), BCKD(1), SYNCD(1), LSMP(1));
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jz_writef(AIC_I2SCR, ESCLK(1), AMSL(0));
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/* Stereo audio, packed 16 bit samples */
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jz_writef(AIC_CCR, PACK16(1), CHANNEL(1), OSS(1));
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/* Initialize DAC */
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i2c_x1000_set_freq(AK4376_BUS, I2C_FREQ_400K);
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ak4376_init();
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}
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void audiohw_postinit(void)
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{
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}
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void audiohw_close(void)
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{
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ak4376_close();
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}
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void ak4376_set_pdn_pin(int level)
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{
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gpio_config(GPIO_A, 1 << 16, GPIO_OUTPUT(level ? 1 : 0));
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}
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int ak4376_set_mclk_freq(int hw_freq, bool enabled)
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{
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/* Get the multiplier */
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int freq = hw_freq_sampr[hw_freq];
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int mult = freq >= SAMPR_176 ? 128 : 256;
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if(enabled) {
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/* Set the new frequency; clock is enabled afterward */
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if(aic_i2s_set_mclk(X1000_CLK_SCLK_A, freq, mult))
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logf("WARNING: unachievable audio rate %d x %d!?", freq, mult);
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} else {
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/* Shut off the clock */
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jz_writef(AIC_I2SCR, STPBK(1));
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}
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return mult;
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}
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