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/*
* Copyright 2020 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "audio_codec.h"
#include "ec_commands.h"
#include "wov_chip.h"
#define CPRINTS(format, args...) cprints(CC_AUDIO_CODEC, format, ## args)
int audio_codec_i2s_rx_enable(void)
{
/*
* The mic source and sample rate don't need to be set each time
* an i2s stream is started, but the audio codec does not
* contain a method to select these as they must be the values
* set below for proper i2s operation. Since the default values
* set in wov.c are different than what's required, they are set
* each time an i2s stream is started.
*/
wov_set_mic_source(WOV_SRC_STEREO);
/* Mode must be WOV_MODE_OFF to change sample rate */
wov_set_mode(WOV_MODE_OFF);
wov_set_sample_rate(48000);
return wov_set_mode(WOV_MODE_I2S);
}
int audio_codec_i2s_rx_disable(void)
{
return wov_set_mode(WOV_MODE_OFF);
}
int audio_codec_i2s_rx_set_sample_depth(uint8_t depth)
{
int bits_num;
if (depth == EC_CODEC_I2S_RX_SAMPLE_DEPTH_24)
bits_num = 24;
else
bits_num = 16;
/* Sample depth can only be changed when mode is WOV_MODE_OFF */
wov_set_mode(WOV_MODE_OFF);
return wov_set_sample_depth(bits_num);
}
int audio_codec_i2s_rx_set_daifmt(uint8_t daifmt)
{
enum wov_dai_format fmt = WOV_DAI_FMT_I2S;
switch (daifmt) {
case EC_CODEC_I2S_RX_DAIFMT_I2S:
fmt = WOV_DAI_FMT_I2S;
break;
case EC_CODEC_I2S_RX_DAIFMT_RIGHT_J:
fmt = WOV_DAI_FMT_RIGHT_J;
break;
case EC_CODEC_I2S_RX_DAIFMT_LEFT_J:
fmt = WOV_DAI_FMT_LEFT_J;
break;
}
/* To change mode setting it must be set to WOV_MODE_OFF */
wov_set_mode(WOV_MODE_OFF);
wov_set_i2s_fmt(fmt);
return EC_SUCCESS;
}
int audio_codec_i2s_rx_set_bclk(uint32_t bclk)
{
/* To change bclk setting it must be set to WOV_MODE_OFF */
wov_set_mode(WOV_MODE_OFF);
wov_set_i2s_bclk(bclk);
return EC_SUCCESS;
}
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