nuttx/boards/arm/cxd56xx/drivers/audio/cxd56_audio_mic.c

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/****************************************************************************
* boards/arm/cxd56xx/drivers/audio/cxd56_audio_mic.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <arch/chip/audio.h>
#include "cxd56_audio_config.h"
#include "cxd56_audio_mic.h"
#include "cxd56_audio_ac_reg.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define CIC_NUM 4
#define CIC_MIC_CH_NUM 2
#define MIC_CH_BITNUM 4
#define MIC_CH_BITMAP 0xf
/****************************************************************************
* Public Functions
****************************************************************************/
CXD56_AUDIO_ECODE cxd56_audio_mic_enable(cxd56_audio_mic_gain_t *gain)
{
CXD56_AUDIO_ECODE ret = CXD56_AUDIO_ECODE_OK;
uint8_t mic_num;
uint8_t cic_num;
uint8_t mic_sel;
uint8_t mic_mode;
uint32_t mic_map;
cxd56_audio_mic_gain_t cic_gain;
cxd56_audio_clkmode_t clk_mode;
uint8_t i;
/* Get mic number. */
mic_num = cxd56_audio_config_get_micnum();
/* Get CIC filter number. */
cic_num = (mic_num + 1) / CIC_MIC_CH_NUM;
/* Get mic mode. */
mic_mode = cxd56_audio_config_get_micmode();
/* Set cic gain. */
mic_map = cxd56_audio_config_get_micmap();
for (i = 0; i < CXD56_AUDIO_MIC_CH_MAX; i++)
{
mic_sel = (mic_map >> (i * MIC_CH_BITNUM)) &
MIC_CH_BITMAP;
if ((mic_sel >= 1) && (mic_sel <= 4))
{
cic_gain.gain[i] = 0;
}
else
{
cic_gain.gain[i] = gain->gain[i];
}
}
ret = cxd56_audio_ac_reg_poweron_cic(CXD56_AUDIO_CFG_CIC_IN,
mic_mode,
cic_num,
&cic_gain);
if (CXD56_AUDIO_ECODE_OK != ret)
{
return ret;
}
clk_mode = cxd56_audio_config_get_clkmode();
ret = cxd56_audio_ac_reg_poweron_decim(mic_mode, clk_mode);
if (CXD56_AUDIO_ECODE_OK != ret)
{
return ret;
}
return ret;
}
CXD56_AUDIO_ECODE cxd56_audio_mic_disable(void)
{
/* Disable DECIM. */
cxd56_audio_ac_reg_poweroff_decim();
/* Power off CIC. */
cxd56_audio_ac_reg_poweroff_cic();
return CXD56_AUDIO_ECODE_OK;
}
CXD56_AUDIO_ECODE cxd56_audio_mic_set_gain(cxd56_audio_mic_gain_t *gain)
{
CXD56_AUDIO_ECODE ret = CXD56_AUDIO_ECODE_OK;
uint8_t mic_num;
uint8_t cic_num;
uint8_t mic_sel;
uint32_t mic_map;
cxd56_audio_mic_gain_t cic_gain;
uint8_t i;
/* Get mic number. */
mic_num = cxd56_audio_config_get_micnum();
/* Get CIC filter number. */
cic_num = (mic_num + 1) / CIC_MIC_CH_NUM;
/* Set cic gain. */
mic_map = cxd56_audio_config_get_micmap();
for (i = 0; i < CXD56_AUDIO_MIC_CH_MAX; i++)
{
mic_sel = (mic_map >> (i * MIC_CH_BITNUM)) &
MIC_CH_BITMAP;
if ((mic_sel >= 1) && (mic_sel <= 4))
{
cic_gain.gain[i] = 0;
}
else
{
cic_gain.gain[i] = gain->gain[i];
}
}
cxd56_audio_ac_reg_set_cicgain(cic_num, &cic_gain);
return ret;
}
CXD56_AUDIO_ECODE cxd56_audio_mic_set_seloutch(uint8_t dma_mic_num,
cxd56_audio_samp_fmt_t format)
{
uint8_t i;
cxd56_audio_ac_reg_seloutch_t seloutch;
if ((format == CXD56_AUDIO_SAMP_FMT_16) &&
(CXD56_AUDIO_CFG_DMA_FORMAT == CXD56_AUDIO_CFG_DMA_FORMAT_RL))
{
for (i = 0; i < CXD56_AUDIO_MIC_CH_MAX; i++)
{
seloutch.ch[i] = (i & 1) ? i - 1 : i + 1;
}
}
else
{
for (i = 0; i < CXD56_AUDIO_MIC_CH_MAX; i++)
{
seloutch.ch[i] = i;
}
}
if ((format == CXD56_AUDIO_SAMP_FMT_16) && ((dma_mic_num & 1) == 1))
{
if (CXD56_AUDIO_CFG_DMA_FORMAT == CXD56_AUDIO_CFG_DMA_FORMAT_LR)
{
seloutch.ch[dma_mic_num] = seloutch.ch[dma_mic_num - 1];
}
else
{
seloutch.ch[dma_mic_num - 1] = seloutch.ch[dma_mic_num];
}
}
cxd56_audio_ac_reg_set_seloutch(&seloutch);
return CXD56_AUDIO_ECODE_OK;
}