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nuttx/drivers/audio/es8388.c
jinxiuxu b874d95beb drivers/audio: fix samp rate conversion issue 
Signed-off-by: jinxiuxu <jinxiuxu@xiaomi.com>
2024-08-22 09:13:51 -03:00

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/****************************************************************************
* drivers/audio/es8388.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 <sys/types.h>
#include <sys/ioctl.h>
#include <inttypes.h>
#include <stdint.h>
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <math.h>
#include <fixedmath.h>
#include <debug.h>
#include <pthread.h>
#include <sys/param.h>
#include <nuttx/kmalloc.h>
#include <nuttx/mqueue.h>
#include <nuttx/queue.h>
#include <nuttx/clock.h>
#include <nuttx/wqueue.h>
#include <nuttx/i2c/i2c_master.h>
#include <nuttx/fs/fs.h>
#include <nuttx/fs/ioctl.h>
#include <nuttx/audio/i2s.h>
#include <nuttx/audio/audio.h>
#include <nuttx/audio/es8388.h>
#include "es8388.h"
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
#if !defined(CONFIG_ES8388_REGDUMP)
static
#endif
uint8_t es8388_readreg(FAR struct es8388_dev_s *priv, uint8_t regaddr);
static void es8388_writereg(FAR struct es8388_dev_s *priv,
uint8_t regaddr,
uint16_t regval);
#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
static void es8388_setvolume(FAR struct es8388_dev_s *priv,
es_module_e module,
uint16_t volume);
#endif
static void es8388_setmclkfrequency(FAR struct es8388_dev_s *priv);
#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
static void es8388_setmute(FAR struct es8388_dev_s *priv,
es_module_e module,
bool enable);
#endif
static void es8388_setmicgain(FAR struct es8388_dev_s *priv, uint32_t gain);
static void es8388_setbitspersample(FAR struct es8388_dev_s *priv);
static void es8388_setsamplerate(FAR struct es8388_dev_s *priv);
static int es8388_getcaps(FAR struct audio_lowerhalf_s *dev,
int type,
FAR struct audio_caps_s *caps);
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8388_configure(FAR struct audio_lowerhalf_s *dev,
FAR void *session,
FAR const struct audio_caps_s *caps);
#else
static int es8388_configure(FAR struct audio_lowerhalf_s *dev,
FAR const struct audio_caps_s *caps);
#endif
static int es8388_shutdown(FAR struct audio_lowerhalf_s *dev);
static void es8388_processdone(FAR struct i2s_dev_s *i2s,
FAR struct ap_buffer_s *apb,
FAR void *arg,
int result);
static void es8388_returnbuffers(FAR struct es8388_dev_s *priv);
static int es8388_processbegin(FAR struct es8388_dev_s *priv);
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8388_start(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
#else
static int es8388_start(FAR struct audio_lowerhalf_s *dev);
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8388_stop(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
#else
static int es8388_stop(FAR struct audio_lowerhalf_s *dev);
#endif
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8388_pause(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
static int es8388_resume(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
#else
static int es8388_pause(FAR struct audio_lowerhalf_s *dev);
static int es8388_resume(FAR struct audio_lowerhalf_s *dev);
#endif
#endif
static int es8388_enqueuebuffer(FAR struct audio_lowerhalf_s *dev,
FAR struct ap_buffer_s *apb);
static int es8388_cancelbuffer(FAR struct audio_lowerhalf_s *dev,
FAR struct ap_buffer_s *apb);
static int es8388_ioctl(FAR struct audio_lowerhalf_s *dev,
int cmd,
unsigned long arg);
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8388_reserve(FAR struct audio_lowerhalf_s *dev,
FAR void **session);
#else
static int es8388_reserve(FAR struct audio_lowerhalf_s *dev);
#endif
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8388_release(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
#else
static int es8388_release(FAR struct audio_lowerhalf_s *dev);
#endif
static void *es8388_workerthread(pthread_addr_t pvarg);
static void es8388_audio_output(FAR struct es8388_dev_s *priv);
static void es8388_audio_input(FAR struct es8388_dev_s *priv);
static void es8388_reset(FAR struct es8388_dev_s *priv);
/****************************************************************************
* Private Data
****************************************************************************/
static const struct audio_ops_s g_audioops =
{
es8388_getcaps, /* getcaps */
es8388_configure, /* configure */
es8388_shutdown, /* shutdown */
es8388_start, /* start */
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
es8388_stop, /* stop */
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
es8388_pause, /* pause */
es8388_resume, /* resume */
#endif
NULL, /* allocbuffer */
NULL, /* freebuffer */
es8388_enqueuebuffer, /* enqueue_buffer */
es8388_cancelbuffer, /* cancel_buffer */
es8388_ioctl, /* ioctl */
NULL, /* read */
NULL, /* write */
es8388_reserve, /* reserve */
es8388_release /* release */
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: es8388_readreg
*
* Description:
* Read the specified 8-bit register from the ES8388 device through I2C.
*
* priv - A reference to the driver state structure.
* regaddr - Address of the register to be read.
*
* Returned Value:
* On success, the byte stored in the register.
* On failure, 0.
*
****************************************************************************/
#if !defined(CONFIG_ES8388_REGDUMP)
static
#endif
uint8_t es8388_readreg(FAR struct es8388_dev_s *priv, uint8_t regaddr)
{
int retries;
/* Try up to three times to read the register */
for (retries = 0; retries < 3; retries++)
{
struct i2c_msg_s msg[2];
uint8_t data;
int ret;
/* Set up to write the address */
msg[0].frequency = priv->lower->frequency;
msg[0].addr = priv->lower->address;
msg[0].flags = 0;
msg[0].buffer = &regaddr;
msg[0].length = 1;
/* Followed by the read data */
msg[1].frequency = priv->lower->frequency;
msg[1].addr = priv->lower->address;
msg[1].flags = I2C_M_READ;
msg[1].buffer = &data;
msg[1].length = 12;
/* Read the register data. The returned value is the number messages
* completed.
*/
ret = I2C_TRANSFER(priv->i2c, msg, 2);
if (ret < 0)
{
#ifdef CONFIG_I2C_RESET
/* Perhaps the I2C bus is locked up? Try to shake the bus free */
audwarn("WARNING: I2C_TRANSFER failed: %d ... Resetting\n", ret);
ret = I2C_RESET(priv->i2c);
if (ret < 0)
{
auderr("I2C_RESET failed: %d\n", ret);
break;
}
#else
auderr("I2C_TRANSFER failed: %d\n", ret);
#endif
}
else
{
/* The I2C transfer was successful... break out of the loop and
* return the value read.
*/
audinfo("Read: %02x -> %02x\n", regaddr, data);
return data;
}
audinfo("retries=%d regaddr=%02x\n", retries, regaddr);
}
/* No error indication is returned on a failure... just return zero */
return 0;
}
/****************************************************************************
* Name: es8388_writereg
*
* Description:
* Write the specified 8-bit register to the ES8388 device through I2C.
*
* Input Parameters:
* priv - A reference to the driver state structure.
* regaddr - Address of the register to be written.
* regval - Value to be written.
*
* Returned Value:
* None.
*
****************************************************************************/
static void es8388_writereg(FAR struct es8388_dev_s *priv,
uint8_t regaddr,
uint16_t regval)
{
struct i2c_config_s config;
int retries;
/* Setup up the I2C configuration */
config.frequency = priv->lower->frequency;
config.address = priv->lower->address;
config.addrlen = 7;
/* Try up to three times to write the register */
for (retries = 0; retries < 3; retries++)
{
uint8_t data[2];
int ret;
/* Set up the data to write */
data[0] = regaddr;
data[1] = regval;
/* Read the register data. The returned value is the number messages
* completed.
*/
ret = i2c_write(priv->i2c, &config, data, 2);
if (ret < 0)
{
#ifdef CONFIG_I2C_RESET
/* Perhaps the I2C bus is locked up? Try to shake the bus free */
audwarn("WARNING: i2c_write failed: %d ... Resetting\n", ret);
ret = I2C_RESET(priv->i2c);
if (ret < 0)
{
auderr("I2C_RESET failed: %d\n", ret);
break;
}
#else
auderr("I2C_TRANSFER failed: %d\n", ret);
#endif
}
else
{
/* The I2C transfer was successful... break out of the loop and
* return.
*/
audinfo("Write: %02x <- %02x\n", regaddr, regval);
return;
}
audinfo("retries=%d regaddr=%02x\n", retries, regaddr);
}
}
/****************************************************************************
* Name: es8388_setmicgain
*
* Description:
* Set the microphone gain.
*
* Input Parameters:
* priv - A reference to the driver state structure.
* gain - The microphone gain to be set in the codec (0..24).
*
* Returned Value:
* None.
*
****************************************************************************/
static void es8388_setmicgain(FAR struct es8388_dev_s *priv, uint32_t gain)
{
static const es_mic_gain_e gain_map[] =
{
ES_MIC_GAIN_0DB,
ES_MIC_GAIN_3DB,
ES_MIC_GAIN_6DB,
ES_MIC_GAIN_9DB,
ES_MIC_GAIN_12DB,
ES_MIC_GAIN_15DB,
ES_MIC_GAIN_18DB,
ES_MIC_GAIN_21DB,
ES_MIC_GAIN_24DB,
};
priv->mic_gain = gain_map[MIN(gain, 24) / 3];
es8388_writereg(priv, ES8388_ADCCONTROL1,
ES8388_MICAMPR(priv->mic_gain) |
ES8388_MICAMPL(priv->mic_gain));
}
/****************************************************************************
* Name: es8388_setvolume
*
* Description:
* Set the right and left volume values in the ES8388 device based on the
* desired volume and balance settings.
*
* Input Parameters:
* priv - A reference to the driver state structure;
* module - The module to change the volume for;
* volume - The volume to be set in the codec (0..1000).
*
* Returned Value:
* None.
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
static void es8388_setvolume(FAR struct es8388_dev_s *priv,
es_module_e module,
uint16_t volume)
{
uint16_t leftlvl;
int16_t dbleftlvl;
uint16_t rightlvl;
int16_t dbrightlvl;
if (volume > AUDIO_VOLUME_MAX)
{
audwarn("Warning: Volume > AUDIO_VOLUME_MAX!\n");
volume = AUDIO_VOLUME_MAX;
}
audinfo("Volume = %u\n", volume);
#ifndef CONFIG_AUDIO_EXCLUDE_BALANCE
/* Calculate the left channel volume level {0..1000} */
if (priv->balance <= AUDIO_BALANCE_CENTER)
{
leftlvl = volume;
}
else if (priv->balance == AUDIO_BALANCE_RIGHT)
{
leftlvl = AUDIO_VOLUME_MIN;
}
else
{
leftlvl = ((((AUDIO_BALANCE_RIGHT - priv->balance) * 100) /
AUDIO_BALANCE_CENTER) * volume) / 100;
}
/* Calculate the right channel volume level {0..1000} */
if (priv->balance >= AUDIO_BALANCE_CENTER)
{
rightlvl = volume;
}
else if (priv->balance == AUDIO_BALANCE_LEFT)
{
rightlvl = AUDIO_VOLUME_MIN;
}
else
{
rightlvl = (((priv->balance * 100) / AUDIO_BALANCE_CENTER) * volume) /
100;
}
# else
leftlvl = volume;
rightlvl = volume;
# endif
/* Convert from (0..1000) to (-96..0) */
dbleftlvl = (int16_t)
(leftlvl ? (20 * log10f((float)rightlvl / AUDIO_VOLUME_MAX)) : -96);
dbrightlvl = (int16_t)
(rightlvl ? (20 * log10f((float)rightlvl / AUDIO_VOLUME_MAX)) : -96);
audinfo("Volume: dbleftlvl = %d, dbrightlvl = %d\n",
dbleftlvl, dbrightlvl);
/* Convert and truncate to 1 byte */
dbleftlvl = ((-dbleftlvl) << 1) & 0xff;
dbrightlvl = ((-dbrightlvl) << 1) & 0xff;
/* Set the volume */
if (module == ES_MODULE_DAC || module == ES_MODULE_ADC_DAC)
{
es8388_writereg(priv, ES8388_DACCONTROL4, ES8388_LDACVOL(dbleftlvl));
es8388_writereg(priv, ES8388_DACCONTROL5, ES8388_RDACVOL(dbrightlvl));
priv->volume_out = volume;
}
if (module == ES_MODULE_ADC || module == ES_MODULE_ADC_DAC)
{
es8388_writereg(priv, ES8388_ADCCONTROL8, ES8388_LADCVOL(dbleftlvl));
es8388_writereg(priv, ES8388_ADCCONTROL9, ES8388_RADCVOL(dbrightlvl));
priv->volume_in = volume;
}
}
#endif /* CONFIG_AUDIO_EXCLUDE_VOLUME */
/****************************************************************************
* Name: es8388_setmclkfrequency
*
* Description:
* Set the frequency of the I2S' Master Clock (MCLK).
*
* Input Parameters:
* priv - A reference to the driver state structure.
*
* Returned Value:
* Returns OK or a negated errno value on failure.
*
****************************************************************************/
static void es8388_setmclkfrequency(FAR struct es8388_dev_s *priv)
{
int i;
priv->mclk = 0;
for (i = 0; i < nitems(es8388_mclk_rate); i++)
{
if (es8388_mclk_rate[i].sample_rate == priv->samprate)
{
/* Normally master clock should be multiple of the sample rate
* and bclk at the same time. The field mclk_rate_s::multiple
* means the multiple of mclk to the sample rate. If data width
* is 24 bits, in order to keep mclk a multiple to the bclk,
* mclk_rate_s::multiple should be a divisible by 3, otherwise
* the ws signal will be inaccurate.
*/
priv->mclk = es8388_mclk_rate[i].mclk;
if (es8388_mclk_rate[i].multiple % (priv->bpsamp / 8) == 0)
{
break;
}
}
}
if (priv->mclk)
{
audinfo("MCLK Freq: %u\n", priv->mclk);
int ret = I2S_SETMCLKFREQUENCY(priv->i2s, priv->mclk);
if (ret < 0)
{
if (ret != -ENOTTY)
{
auderr("Failed to set the MCLK on lower half\n");
}
else
{
priv->mclk = 0;
auderr("MCLK cannot be set on lower half\n");
}
}
}
else
{
auderr("Unsupported combination of sample rate and"
" data width\n");
}
}
/****************************************************************************
* Name: es8388_setmute
*
* Description:
* Mute/unmute the ADC or DAC of the codec based on the current settings.
*
* Input Parameters:
* priv - A reference to the driver state structure.
* enable - Boolean to enable or disable the mute function.
*
* Returned Value:
* None.
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
static void es8388_setmute(FAR struct es8388_dev_s *priv,
es_module_e module,
bool enable)
{
uint8_t reg = 0;
audinfo("module=%d, mute=%d\n", module, (int)enable);
priv->mute = enable;
if (module == ES_MODULE_DAC || module == ES_MODULE_ADC_DAC)
{
reg = es8388_readreg(priv, ES8388_DACCONTROL3) &
(~ES8388_DACMUTE_BITMASK);
es8388_writereg(priv, ES8388_DACCONTROL3,
reg | ES8388_DACMUTE(enable));
}
if (module == ES_MODULE_ADC || module == ES_MODULE_ADC_DAC)
{
reg = es8388_readreg(priv, ES8388_ADCCONTROL7) &
(~ES8388_ADCMUTE_BITMASK);
es8388_writereg(priv, ES8388_ADCCONTROL7,
reg | ES8388_ADCMUTE(enable));
}
}
#endif
/****************************************************************************
* Name: es8388_setbitspersample
*
* Description:
* Set the number of bits per sample used by the I2S driver and the codec.
*
* Input Parameters:
* priv - A reference to the driver state structure.
*
* Returned Value:
* None.
*
****************************************************************************/
static void es8388_setbitspersample(FAR struct es8388_dev_s *priv)
{
uint8_t reg;
uint8_t bit_config;
DEBUGASSERT(priv && priv->lower);
switch (priv->bpsamp)
{
case 16:
bit_config = ES_WORD_LENGTH_16BITS;
break;
case 18:
bit_config = ES_WORD_LENGTH_18BITS;
break;
case 20:
bit_config = ES_WORD_LENGTH_20BITS;
break;
case 24:
bit_config = ES_WORD_LENGTH_24BITS;
break;
case 32:
bit_config = ES_WORD_LENGTH_32BITS;
break;
default:
audwarn("Data length not supported.\n");
return;
}
I2S_TXDATAWIDTH(priv->i2s, priv->bpsamp);
I2S_RXDATAWIDTH(priv->i2s, priv->bpsamp);
if (priv->audio_mode == ES_MODULE_ADC ||
priv->audio_mode == ES_MODULE_ADC_DAC)
{
reg = es8388_readreg(priv, ES8388_ADCCONTROL4) &
(~ES8388_ADCWL_BITMASK);
es8388_writereg(priv, ES8388_ADCCONTROL4,
reg | ES8388_ADCWL(bit_config));
}
if (priv->audio_mode == ES_MODULE_DAC ||
priv->audio_mode == ES_MODULE_ADC_DAC)
{
reg = es8388_readreg(priv, ES8388_DACCONTROL1) &
(~ES8388_DACWL_BITMASK);
es8388_writereg(priv, ES8388_DACCONTROL1,
reg | ES8388_DACWL(bit_config));
}
audinfo("Datawidth set to %u\n", priv->bpsamp);
}
/****************************************************************************
* Name: es8388_setsamplerate
*
* Description:
* Sets the sample frequency for the codec ADC/DAC and the I2S driver.
*
* Input Parameters:
* priv - A reference to the driver state structure.
*
* Returned Value:
* None.
*
****************************************************************************/
static void es8388_setsamplerate(FAR struct es8388_dev_s *priv)
{
DEBUGASSERT(priv && priv->lower);
uint16_t regval;
switch (priv->samprate)
{
case 8000:
regval = ES_LCLK_DIV_1536;
break;
case 11025:
case 12000:
regval = ES_LCLK_DIV_1024;
break;
case 16000:
regval = ES_LCLK_DIV_768;
break;
case 22050:
case 24000:
regval = ES_LCLK_DIV_512;
break;
case 32000:
regval = ES_LCLK_DIV_384;
break;
case 44100:
case 48000:
regval = ES_LCLK_DIV_256;
break;
case 88200:
case 96000:
regval = ES_LCLK_DIV_128;
break;
default:
audwarn("Sample rate not supported.\n");
return;
}
/* es8388_setmclkfrequency needs to be called before I2S_**SAMPLERATE */
es8388_setmclkfrequency(priv);
I2S_TXSAMPLERATE(priv->i2s, priv->samprate);
I2S_RXSAMPLERATE(priv->i2s, priv->samprate);
if (priv->audio_mode == ES_MODULE_ADC ||
priv->audio_mode == ES_MODULE_ADC_DAC)
{
es8388_writereg(priv, ES8388_ADCCONTROL5, ES8388_ADCFSRATIO(regval));
}
if (priv->audio_mode == ES_MODULE_DAC ||
priv->audio_mode == ES_MODULE_ADC_DAC)
{
es8388_writereg(priv, ES8388_DACCONTROL2, ES8388_DACFSRATIO(regval));
}
audinfo("Sample rate set to %d\n", priv->samprate);
}
/****************************************************************************
* Name: es8388_getcaps
*
* Description:
* Get the audio device capabilities.
*
* Input Parameters:
* dev - A reference to the lower half state structure.
* type - The type of query.
* caps - A reference to an audio caps structure.
*
* Returned Value:
* Length of the caps structure.
*
****************************************************************************/
static int es8388_getcaps(FAR struct audio_lowerhalf_s *dev, int type,
FAR struct audio_caps_s *caps)
{
/* Validate the structure */
DEBUGASSERT(caps && caps->ac_len >= sizeof(struct audio_caps_s));
audinfo("getcaps: type=%d ac_type=%d\n", type, caps->ac_type);
uint16_t *ptr;
/* Fill in the caller's structure based on requested info */
caps->ac_format.hw = 0;
caps->ac_controls.w = 0;
switch (caps->ac_type)
{
/* Caller is querying for the types of units we support */
case AUDIO_TYPE_QUERY:
/* Provide our overall capabilities. The interfacing software
* must then call us back for specific info for each capability.
*/
caps->ac_channels = 2; /* Stereo output */
switch (caps->ac_subtype)
{
case AUDIO_TYPE_QUERY:
/* The input formats we can decode / accept */
#ifdef CONFIG_AUDIO_FORMAT_PCM
caps->ac_format.hw |= (1 << (AUDIO_FMT_PCM - 1));
#endif
/* The types of audio units we implement */
caps->ac_controls.b[0] = AUDIO_TYPE_INPUT |
AUDIO_TYPE_OUTPUT |
AUDIO_TYPE_FEATURE;
break;
default:
caps->ac_controls.b[0] = AUDIO_SUBFMT_END;
break;
}
break;
/* Provide capabilities of our OUTPUT unit */
case AUDIO_TYPE_OUTPUT:
caps->ac_channels = 2;
switch (caps->ac_subtype)
{
case AUDIO_TYPE_QUERY:
/* Report the Sample rates we support */
/* 8kHz is hardware dependent */
ptr = (uint16_t *)caps->ac_controls.b;
*ptr =
AUDIO_SAMP_RATE_11K | AUDIO_SAMP_RATE_16K |
AUDIO_SAMP_RATE_22K | AUDIO_SAMP_RATE_32K |
AUDIO_SAMP_RATE_44K | AUDIO_SAMP_RATE_48K;
break;
default:
break;
}
break;
case AUDIO_TYPE_INPUT:
caps->ac_channels = 2;
switch (caps->ac_subtype)
{
case AUDIO_TYPE_QUERY:
/* Report supported input sample rates */
ptr = (uint16_t *)caps->ac_controls.b;
*ptr =
AUDIO_SAMP_RATE_11K | AUDIO_SAMP_RATE_16K |
AUDIO_SAMP_RATE_22K | AUDIO_SAMP_RATE_32K |
AUDIO_SAMP_RATE_44K | AUDIO_SAMP_RATE_48K;
break;
default:
break;
}
break;
/* Provide capabilities of our FEATURE units */
case AUDIO_TYPE_FEATURE:
/* If the sub-type is UNDEF, then report the Feature Units we
* support.
*/
if (caps->ac_subtype == AUDIO_FU_UNDEF)
{
/* Fill in the ac_controls section with the Feature Units we
* have.
*/
caps->ac_controls.b[0] = AUDIO_FU_VOLUME | AUDIO_FU_MUTE;
caps->ac_controls.b[1] = (AUDIO_FU_BALANCE |
AUDIO_FU_INP_GAIN) >> 8;
}
break;
/* All others we don't support */
default:
/* Zero out the fields to indicate no support */
caps->ac_subtype = 0;
caps->ac_channels = 0;
break;
}
/* Return the length of the audio_caps_s struct for validation of
* proper Audio device type.
*/
return caps->ac_len;
}
/****************************************************************************
* Name: es8388_configure
*
* Description:
* Configure the audio device for the specified mode of operation.
*
* Input Parameters:
* dev - A reference to the lower half state structure.
* session - The current audio session.
* caps - A reference to an audio caps structure.
*
* Returned Value:
* Returns OK or a negated errno value on failure.
*
****************************************************************************/
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8388_configure(FAR struct audio_lowerhalf_s *dev,
FAR void *session,
FAR const struct audio_caps_s *caps)
#else
static int es8388_configure(FAR struct audio_lowerhalf_s *dev,
FAR const struct audio_caps_s *caps)
#endif
{
FAR struct es8388_dev_s *priv = (FAR struct es8388_dev_s *)dev;
int ret = OK;
DEBUGASSERT(priv != NULL && caps != NULL);
audinfo("configure: ac_type: %d\n", caps->ac_type);
/* Process the configure operation */
switch (caps->ac_type)
{
case AUDIO_TYPE_FEATURE:
audinfo(" AUDIO_TYPE_FEATURE\n");
/* Process based on Feature Unit */
switch (caps->ac_format.hw)
{
#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
case AUDIO_FU_VOLUME:
{
/* Set the volume */
uint16_t volume = caps->ac_controls.hw[0];
audinfo(" Volume: %d\n", volume);
if (volume >= 0 && volume <= 1000)
{
es8388_setvolume(priv, priv->audio_mode, volume);
}
else
{
ret = -EDOM;
}
}
break;
#endif /* CONFIG_AUDIO_EXCLUDE_VOLUME */
#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
case AUDIO_FU_MUTE:
{
/* Mute/Unmute */
bool mute = (bool)caps->ac_controls.hw[0];
audinfo(" Mute: %d\n", mute);
es8388_setmute(priv, ES_MODULE_DAC, mute);
}
break;
#endif /* CONFIG_AUDIO_EXCLUDE_MUTE */
#ifndef CONFIG_AUDIO_EXCLUDE_BALANCE
case AUDIO_FU_BALANCE:
{
/* Set the Balance */
uint16_t balance = caps->ac_controls.hw[0];
audinfo(" Balance: %d\n", balance);
if (balance >= 0 && balance <= 1000)
{
priv->balance = balance;
es8388_setvolume(priv, priv->audio_mode, priv->volume_out);
}
else
{
ret = -EDOM;
}
}
break;
#endif /* CONFIG_AUDIO_EXCLUDE_BALANCE */
case AUDIO_FU_INP_GAIN:
{
/* Set the mic gain */
uint32_t mic_gain = caps->ac_controls.hw[0];
audinfo(" Mic gain: %" PRIu32 "\n", mic_gain);
es8388_setmicgain(priv, mic_gain);
}
break;
default:
auderr(" Unrecognized feature unit\n");
ret = -ENOTTY;
break;
}
break;
case AUDIO_TYPE_OUTPUT:
{
audinfo(" AUDIO_TYPE_OUTPUT:\n");
audinfo(" Number of channels: %u\n", caps->ac_channels);
audinfo(" Sample rate: %u\n", caps->ac_controls.hw[0]);
audinfo(" Sample width: %u\n", caps->ac_controls.b[2]);
/* Verify that all of the requested values are supported */
ret = -ERANGE;
if (caps->ac_channels != 1 && caps->ac_channels != 2)
{
auderr("Unsupported number of channels: %d\n",
caps->ac_channels);
break;
}
if (caps->ac_controls.b[2] != 16 &&
caps->ac_controls.b[2] != 18 &&
caps->ac_controls.b[2] != 20 &&
caps->ac_controls.b[2] != 24 &&
caps->ac_controls.b[2] != 32)
{
auderr("Unsupported bits per sample: %d\n",
caps->ac_controls.b[2]);
break;
}
/* Save the current stream configuration */
priv->samprate = caps->ac_controls.hw[0];
priv->nchannels = caps->ac_channels;
priv->bpsamp = caps->ac_controls.b[2];
es8388_audio_output(priv);
es8388_reset(priv);
es8388_setsamplerate(priv);
es8388_setbitspersample(priv);
ret = OK;
}
break;
case AUDIO_TYPE_INPUT:
{
audinfo(" AUDIO_TYPE_INPUT:\n");
audinfo(" Number of channels: %u\n", caps->ac_channels);
audinfo(" Sample rate: %u\n", caps->ac_controls.hw[0]);
audinfo(" Sample width: %u\n", caps->ac_controls.b[2]);
/* Verify that all of the requested values are supported */
ret = -ERANGE;
if (caps->ac_channels != 1 && caps->ac_channels != 2)
{
auderr("Unsupported number of channels: %d\n",
caps->ac_channels);
break;
}
if (caps->ac_controls.b[2] != 16 &&
caps->ac_controls.b[2] != 18 &&
caps->ac_controls.b[2] != 20 &&
caps->ac_controls.b[2] != 24 &&
caps->ac_controls.b[2] != 32)
{
auderr("Unsupported bits per sample: %d\n",
caps->ac_controls.b[2]);
break;
}
/* Save the current stream configuration */
priv->samprate = caps->ac_controls.hw[0];
priv->nchannels = caps->ac_channels;
priv->bpsamp = caps->ac_controls.b[2];
es8388_audio_input(priv);
es8388_reset(priv);
es8388_setsamplerate(priv);
es8388_setbitspersample(priv);
ret = OK;
}
break;
case AUDIO_TYPE_PROCESSING:
break;
}
return ret;
}
/****************************************************************************
* Name: es8388_shutdown
*
* Description:
* Shutdown the ES8388 chip and reset it.
*
* Input Parameters:
* dev - A reference to the lower half state structure.
*
* Returned Value:
* Returns OK.
*
****************************************************************************/
static int es8388_shutdown(FAR struct audio_lowerhalf_s *dev)
{
FAR struct es8388_dev_s *priv = (FAR struct es8388_dev_s *)dev;
DEBUGASSERT(priv);
audinfo("Shutdown triggered\n");
/* Now issue a software reset. This puts all ES8388 registers back in
* their default state.
*/
es8388_reset(priv);
return OK;
}
/****************************************************************************
* Name: es8388_processdone
*
* Description:
* This is the I2S callback function that is invoked when the transfer
* completes.
*
* Input Parameters:
* i2s - A reference to the I2S interface.
* apb - A reference to the audio pipeline buffer.
* arg - A void reference to the driver state structure.
* result - The result of the last transfer.
*
* Returned Value:
* None.
*
****************************************************************************/
static void es8388_processdone(FAR struct i2s_dev_s *i2s,
FAR struct ap_buffer_s *apb,
FAR void *arg,
int result)
{
FAR struct es8388_dev_s *priv = (FAR struct es8388_dev_s *)arg;
struct audio_msg_s msg;
irqstate_t flags;
int ret;
DEBUGASSERT(i2s && priv && priv->running && apb);
audinfo("Transfer done: apb=%p inflight=%d result=%d\n",
apb, priv->inflight, result);
/* We do not place any restriction on the context in which this function
* is called. It may be called from an interrupt handler. Therefore, the
* doneq and in-flight values might be accessed from the interrupt level.
* Not the best design. But we will use interrupt controls to protect
* against that possibility.
*/
flags = enter_critical_section();
/* Add the completed buffer to the end of our doneq. We do not yet
* decrement the reference count.
*/
dq_addlast((FAR dq_entry_t *)apb, &priv->doneq);
/* And decrement the number of buffers in-flight */
DEBUGASSERT(priv->inflight > 0);
priv->inflight--;
/* Save the result of the transfer */
priv->result = result;
leave_critical_section(flags);
/* Now send a message to the worker thread, informing it that there are
* buffers in the done queue that need to be cleaned up.
*/
msg.msg_id = AUDIO_MSG_COMPLETE;
ret = file_mq_send(&priv->mq, (FAR const char *)&msg, sizeof(msg),
CONFIG_ES8388_MSG_PRIO);
if (ret < 0)
{
auderr("file_mq_send failed: %d\n", ret);
}
}
/****************************************************************************
* Name: es8388_returnbuffers
*
* Description:
* This function is called after the completion of one or more data
* transfers. This function will empty the done queue and release our
* reference to each buffer.
*
* Input Parameters:
* priv - A reference to the driver state structure.
*
* Returned Value:
* None.
*
****************************************************************************/
static void es8388_returnbuffers(FAR struct es8388_dev_s *priv)
{
FAR struct ap_buffer_s *apb;
irqstate_t flags;
/* The doneq and in-flight values might be accessed from the interrupt
* level in some implementations. Not the best design. But we will
* use interrupt controls to protect against that possibility.
*/
flags = enter_critical_section();
while (dq_peek(&priv->doneq) != NULL)
{
/* Take the next buffer from the queue of completed transfers */
apb = (FAR struct ap_buffer_s *)dq_remfirst(&priv->doneq);
leave_critical_section(flags);
audinfo("Returning: apb=%p curbyte=%d nbytes=%d flags=%04x\n",
apb, apb->curbyte, apb->nbytes, apb->flags);
/* Are we returning the final buffer in the stream? */
if ((apb->flags & AUDIO_APB_FINAL) != 0)
{
/* Both the pending and the done queues should be empty and there
* should be no buffers in-flight.
*/
DEBUGASSERT(dq_empty(&priv->doneq) && dq_empty(&priv->pendq) &&
priv->inflight == 0);
/* Set the terminating flag. This will, eventually, cause the
* worker thread to exit (if it is not already terminating).
*/
audinfo("Terminating\n");
priv->terminating = true;
}
/* Release our reference to the audio buffer */
apb_free(apb);
/* Send the buffer back up to the previous level. */
#ifdef CONFIG_AUDIO_MULTI_SESSION
priv->dev.upper(priv->dev.priv, AUDIO_CALLBACK_DEQUEUE, apb, OK, NULL);
#else
priv->dev.upper(priv->dev.priv, AUDIO_CALLBACK_DEQUEUE, apb, OK);
#endif
flags = enter_critical_section();
}
leave_critical_section(flags);
}
/****************************************************************************
* Name: es8388_processbegin
*
* Description:
* Start the transfer an audio buffer to the ES8388 via I2S. This
* will not wait for the transfer to complete but will return immediately.
* the es8388_processdone called will be invoked when the transfer
* completes, stimulating the worker thread to call this function again.
*
* Input Parameters:
* priv - A reference to the driver state structure.
*
* Returned Value:
* Returns OK or a negated errno value on failure.
*
****************************************************************************/
static int es8388_processbegin(FAR struct es8388_dev_s *priv)
{
FAR struct ap_buffer_s *apb;
irqstate_t flags;
uint32_t timeout;
int shift;
int ret;
/* Loop while there are audio buffers to be sent and we have few than
* CONFIG_ES8388_INFLIGHT then "in-flight"
*
* The 'inflight' value might be modified from the interrupt level in some
* implementations. We will use interrupt controls to protect against
* that possibility.
*
* The 'pendq', on the other hand, is protected via a mutex. Let's
* hold the mutex while we are busy here and disable the interrupts
* only while accessing 'inflight'.
*/
ret = nxmutex_lock(&priv->pendlock);
if (ret < 0)
{
return ret;
}
while (priv->inflight < CONFIG_ES8388_INFLIGHT &&
dq_peek(&priv->pendq) != NULL && !priv->paused)
{
/* Take next buffer from the queue of pending transfers */
apb = (FAR struct ap_buffer_s *)dq_remfirst(&priv->pendq);
audinfo("Transferring apb=%p, size=%d inflight=%d\n",
apb, apb->nbytes, priv->inflight);
/* Increment the number of buffers in-flight before sending in order
* to avoid a possible race condition.
*/
flags = enter_critical_section();
priv->inflight++;
leave_critical_section(flags);
/* Send the entire audio buffer via I2S. What is a reasonable timeout
* to use? This would depend on the bit rate and size of the buffer.
*
* Samples in the buffer (samples):
* = buffer_size * 8 / bpsamp
* Sample rate (samples/second):
* = samplerate * nchannels
* Expected transfer time (seconds):
* = (buffer_size * 8) / bpsamp / samplerate / nchannels
*
* We will set the timeout about twice that.
*
* NOTES:
* - The multiplier of 8 becomes 16000 for 2x and units of
* milliseconds.
* - 16000 is a approximately 16384 (1 << 14).
* nchannels is either (1 << 0) or (1 << 1).
* So this can be simplifies to (milliseconds):
*
* = (buffer_size << shift) / bpsamp / samplerate
*/
shift = 14;
shift -= (priv->nchannels > 1) ? 1 : 0;
timeout = MSEC2TICK(((uint32_t)(apb->nbytes - apb->curbyte) << shift) /
(uint32_t)priv->samprate / (uint32_t)priv->bpsamp);
if (priv->audio_mode == ES_MODULE_DAC)
{
ret = I2S_SEND(priv->i2s, apb, es8388_processdone,
priv, timeout);
}
else
{
ret = I2S_RECEIVE(priv->i2s, apb, es8388_processdone,
priv, timeout);
}
if (ret < 0)
{
auderr("I2S transfer failed: %d\n", ret);
break;
}
}
nxmutex_unlock(&priv->pendlock);
return ret;
}
/****************************************************************************
* Name: es8388_start
*
* Description:
* Start the configured operation (audio streaming, volume enabled, etc.).
*
* Input Parameters:
* dev - A reference to the lower half state structure.
* session - The current audio session.
*
* Returned Value:
* Returns OK or a negated errno value on failure.
*
****************************************************************************/
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8388_start(FAR struct audio_lowerhalf_s *dev, FAR void *session)
#else
static int es8388_start(FAR struct audio_lowerhalf_s *dev)
#endif
{
FAR struct es8388_dev_s *priv = (FAR struct es8388_dev_s *)dev;
struct sched_param sparam;
struct mq_attr attr;
pthread_attr_t tattr;
FAR void *value;
int ret;
uint8_t prev_regval = 0;
uint8_t regval = 0;
audinfo("ES8388 Start\n");
prev_regval = es8388_readreg(priv, ES8388_DACCONTROL21);
if (priv->audio_mode == ES_MODULE_LINE)
{
es8388_writereg(priv, ES8388_DACCONTROL16,
ES8388_RMIXSEL_RIN2 |
ES8388_LMIXSEL_LIN2);
es8388_writereg(priv, ES8388_DACCONTROL17,
ES8388_LI2LOVOL(ES8388_MIXER_GAIN_0DB) |
ES8388_LI2LO_ENABLE |
ES8388_LD2LO_DISABLE);
es8388_writereg(priv, ES8388_DACCONTROL20,
ES8388_RI2ROVOL(ES8388_MIXER_GAIN_0DB) |
ES8388_RI2RO_ENABLE |
ES8388_RD2RO_DISABLE);
es8388_writereg(priv, ES8388_DACCONTROL21,
ES8388_DAC_DLL_PWD_NORMAL |
ES8388_ADC_DLL_PWD_NORMAL |
ES8388_MCLK_DIS_NORMAL |
ES8388_OFFSET_DIS_DISABLE |
ES8388_LRCK_SEL_ADC |
ES8388_SLRCK_SAME);
}
else
{
es8388_writereg(priv, ES8388_DACCONTROL21,
ES8388_DAC_DLL_PWD_NORMAL |
ES8388_ADC_DLL_PWD_NORMAL |
ES8388_MCLK_DIS_NORMAL |
ES8388_OFFSET_DIS_DISABLE |
ES8388_LRCK_SEL_DAC |
ES8388_SLRCK_SAME);
}
regval = es8388_readreg(priv, ES8388_DACCONTROL21);
if (regval != prev_regval)
{
es8388_writereg(priv, ES8388_CHIPPOWER,
ES8388_DACVREF_PDN_PWRUP |
ES8388_ADCVREF_PDN_PWRUP |
ES8388_DACDLL_PDN_NORMAL |
ES8388_ADCDLL_PDN_NORMAL |
ES8388_DAC_STM_RST_RESET |
ES8388_ADC_STM_RST_RESET |
ES8388_DAC_DIGPDN_RESET |
ES8388_ADC_DIGPDN_RESET);
es8388_writereg(priv, ES8388_CHIPPOWER,
ES8388_DACVREF_PDN_PWRUP |
ES8388_ADCVREF_PDN_PWRUP |
ES8388_DACDLL_PDN_NORMAL |
ES8388_ADCDLL_PDN_NORMAL |
ES8388_DAC_STM_RST_NORMAL |
ES8388_ADC_STM_RST_NORMAL |
ES8388_DAC_DIGPDN_NORMAL |
ES8388_ADC_DIGPDN_NORMAL);
}
if (priv->audio_mode == ES_MODULE_LINE ||
priv->audio_mode == ES_MODULE_ADC_DAC ||
priv->audio_mode == ES_MODULE_ADC)
{
es8388_writereg(priv, ES8388_ADCPOWER,
ES8388_INT1LP_NORMAL |
ES8388_FLASHLP_NORMAL |
ES8388_PDNADCBIASGEN_NORMAL |
ES8388_PDNMICB_PWRON |
ES8388_PDNADCR_PWRUP |
ES8388_PDNADCL_PWRUP |
ES8388_PDNAINR_NORMAL |
ES8388_PDNAINL_NORMAL);
}
if (priv->audio_mode == ES_MODULE_LINE ||
priv->audio_mode == ES_MODULE_ADC_DAC ||
priv->audio_mode == ES_MODULE_DAC)
{
es8388_writereg(priv, ES8388_DACPOWER,
ES8388_ROUT2_ENABLE |
ES8388_LOUT2_ENABLE |
ES8388_ROUT1_ENABLE |
ES8388_LOUT1_ENABLE |
ES8388_PDNDACR_PWRUP |
ES8388_PDNDACL_PWRUP);
}
#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
es8388_setmute(priv, priv->audio_mode, false);
#endif
/* Create a message queue for the worker thread */
snprintf(priv->mqname, sizeof(priv->mqname), "/regconfig/%" PRIXPTR,
(uintptr_t)priv);
attr.mq_maxmsg = 16;
attr.mq_msgsize = sizeof(struct audio_msg_s);
attr.mq_curmsgs = 0;
attr.mq_flags = 0;
ret = file_mq_open(&priv->mq, priv->mqname,
O_RDWR | O_CREAT, 0644, &attr);
if (ret < 0)
{
/* Error creating message queue! */
auderr("Couldn't allocate message queue\n");
return ret;
}
/* Join any old worker thread we had created to prevent a memory leak */
if (priv->threadid != 0)
{
audinfo("Joining old thread\n");
pthread_join(priv->threadid, &value);
}
/* Start our thread for processing device data */
pthread_attr_init(&tattr);
sparam.sched_priority = sched_get_priority_max(SCHED_FIFO) - 3;
pthread_attr_setschedparam(&tattr, &sparam);
pthread_attr_setstacksize(&tattr, CONFIG_ES8388_WORKER_STACKSIZE);
audinfo("Starting worker thread\n");
ret = pthread_create(&priv->threadid, &tattr, es8388_workerthread,
(pthread_addr_t)priv);
if (ret != OK)
{
auderr("pthread_create failed: %d\n", ret);
}
else
{
pthread_setname_np(priv->threadid, "es8388");
audinfo("Created worker thread\n");
}
return ret;
}
/****************************************************************************
* Name: es8388_stop
*
* Description: Stop the configured operation (audio streaming, volume
* disabled, etc.).
*
* Input Parameters:
* dev - A reference to the lower half state structure.
* session - The current audio session.
*
* Returned Value:
* Returns OK.
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8388_stop(FAR struct audio_lowerhalf_s *dev, FAR void *session)
#else
static int es8388_stop(FAR struct audio_lowerhalf_s *dev)
#endif
{
FAR struct es8388_dev_s *priv = (FAR struct es8388_dev_s *)dev;
struct audio_msg_s term_msg;
FAR void *value;
audinfo("ES8388 Stop\n");
if (priv->audio_mode == ES_MODULE_LINE)
{
es8388_writereg(priv, ES8388_DACCONTROL21,
ES8388_DAC_DLL_PWD_NORMAL |
ES8388_ADC_DLL_PWD_NORMAL |
ES8388_MCLK_DIS_NORMAL |
ES8388_OFFSET_DIS_DISABLE |
ES8388_LRCK_SEL_DAC |
ES8388_SLRCK_SAME);
es8388_writereg(priv, ES8388_DACCONTROL16,
ES8388_RMIXSEL_RIN1 |
ES8388_LMIXSEL_LIN1);
es8388_writereg(priv, ES8388_DACCONTROL17,
ES8388_LI2LOVOL(ES8388_MIXER_GAIN_0DB) |
ES8388_LI2LO_DISABLE |
ES8388_LD2LO_ENABLE);
es8388_writereg(priv, ES8388_DACCONTROL20,
ES8388_RI2ROVOL(ES8388_MIXER_GAIN_0DB) |
ES8388_RI2RO_DISABLE |
ES8388_RD2RO_ENABLE);
goto stop_msg;
}
if (priv->audio_mode == ES_MODULE_DAC ||
priv->audio_mode == ES_MODULE_ADC_DAC)
{
es8388_writereg(priv, ES8388_DACPOWER,
ES8388_ROUT2_DISABLE |
ES8388_LOUT2_DISABLE |
ES8388_ROUT1_DISABLE |
ES8388_LOUT1_DISABLE |
ES8388_PDNDACR_PWRUP |
ES8388_PDNDACL_PWRUP);
}
if (priv->audio_mode == ES_MODULE_ADC ||
priv->audio_mode == ES_MODULE_ADC_DAC)
{
es8388_writereg(priv, ES8388_ADCPOWER,
ES8388_INT1LP_LP |
ES8388_FLASHLP_LP |
ES8388_PDNADCBIASGEN_LP |
ES8388_PDNMICB_PWRDN |
ES8388_PDNADCR_PWRDN |
ES8388_PDNADCL_PWRDN |
ES8388_PDNAINR_PWRDN |
ES8388_PDNAINL_PWRDN);
}
if (priv->audio_mode == ES_MODULE_ADC_DAC)
{
es8388_writereg(priv, ES8388_DACCONTROL21,
ES8388_DAC_DLL_PWD_PWRDN |
ES8388_ADC_DLL_PWD_PWRDN |
ES8388_MCLK_DIS_DISABLE |
ES8388_OFFSET_DIS_DISABLE |
ES8388_LRCK_SEL_DAC |
ES8388_SLRCK_SAME);
}
stop_msg:
#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
es8388_setmute(priv, priv->audio_mode, true);
#endif
/* Send a message to stop all audio streaming */
term_msg.msg_id = AUDIO_MSG_STOP;
term_msg.u.data = 0;
file_mq_send(&priv->mq, (FAR const char *)&term_msg, sizeof(term_msg),
CONFIG_ES8388_MSG_PRIO);
/* Join the worker thread */
pthread_join(priv->threadid, &value);
priv->threadid = 0;
es8388_dump_registers(&priv->dev, "After stop");
return OK;
}
#endif
/****************************************************************************
* Name: es8388_pause
*
* Description: Pauses the playback.
*
* Input Parameters:
* dev - A reference to the lower half state structure.
* session - The current audio session.
*
* Returned Value:
* Returns OK.
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8388_pause(FAR struct audio_lowerhalf_s *dev, FAR void *session)
#else
static int es8388_pause(FAR struct audio_lowerhalf_s *dev)
#endif
{
FAR struct es8388_dev_s *priv = (FAR struct es8388_dev_s *)dev;
audinfo("ES8388 Pause\n");
if (priv->running && !priv->paused)
{
priv->paused = true;
#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
es8388_setmute(priv, priv->audio_mode, true);
#endif
}
return OK;
}
#endif /* CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME */
/****************************************************************************
* Name: es8388_resume
*
* Description: Resumes the playback.
*
* Input Parameters:
* dev - A reference to the lower half state structure.
* session - The current audio session.
*
* Returned Value:
* Returns OK.
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8388_resume(FAR struct audio_lowerhalf_s *dev,
FAR void *session)
#else
static int es8388_resume(FAR struct audio_lowerhalf_s *dev)
#endif
{
FAR struct es8388_dev_s *priv = (FAR struct es8388_dev_s *)dev;
audinfo("ES8388 Resume\n");
if (priv->running && priv->paused)
{
priv->paused = false;
#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
es8388_setmute(priv, priv->audio_mode, false);
#endif
es8388_processbegin(priv);
}
return OK;
}
#endif /* CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME */
/****************************************************************************
* Name: es8388_enqueuebuffer
*
* Description:
* Enqueue an Audio Pipeline Buffer for processing.
*
* Input Parameters:
* dev - A reference to the lower half state structure.
* apb - A reference to the audio pipeline buffer.
*
* Returned Value:
* Returns OK or a negated errno value on failure.
*
****************************************************************************/
static int es8388_enqueuebuffer(FAR struct audio_lowerhalf_s *dev,
FAR struct ap_buffer_s *apb)
{
FAR struct es8388_dev_s *priv = (FAR struct es8388_dev_s *)dev;
struct audio_msg_s term_msg;
int ret;
audinfo("Enqueueing: apb=%p curbyte=%d nbytes=%d flags=%04x\n",
apb, apb->curbyte, apb->nbytes, apb->flags);
ret = nxmutex_lock(&priv->pendlock);
if (ret < 0)
{
return ret;
}
/* Take a reference on the new audio buffer */
apb_reference(apb);
/* Add the new buffer to the tail of pending audio buffers */
dq_addlast(&apb->dq_entry, &priv->pendq);
nxmutex_unlock(&priv->pendlock);
/* Send a message to the worker thread indicating that a new buffer has
* been enqueued. If mq is NULL, then the playing has not yet started.
* In that case we are just "priming the pump" and we don't need to send
* any message.
*/
ret = OK;
if (priv->mq.f_inode != NULL)
{
term_msg.msg_id = AUDIO_MSG_ENQUEUE;
term_msg.u.data = 0;
ret = file_mq_send(&priv->mq, (FAR const char *)&term_msg,
sizeof(term_msg), CONFIG_ES8388_MSG_PRIO);
if (ret < 0)
{
auderr("file_mq_send failed: %d\n", ret);
}
}
return ret;
}
/****************************************************************************
* Name: es8388_cancelbuffer
*
* Description: Called when an enqueued buffer is being cancelled.
*
* Input Parameters:
* dev - A reference to the lower half state structure.
* apb - A reference to the audio pipeline buffer.
*
* Returned Value:
* Returns OK.
*
****************************************************************************/
static int es8388_cancelbuffer(FAR struct audio_lowerhalf_s *dev,
FAR struct ap_buffer_s *apb)
{
audinfo("Cancelled apb=%p\n", apb);
return OK;
}
/****************************************************************************
* Name: es8388_ioctl
*
* Description: Perform a device IOCTL.
*
* Input Parameters:
* dev - A reference to the lower half state structure.
* cmd - The IOCTL command.
* arg - The argument of the IOCTL command.
*
* Returned Value:
* Returns OK or a negated errno value on failure.
*
****************************************************************************/
static int es8388_ioctl(FAR struct audio_lowerhalf_s *dev, int cmd,
unsigned long arg)
{
int ret = OK;
#ifdef CONFIG_AUDIO_DRIVER_SPECIFIC_BUFFERS
FAR struct ap_buffer_info_s *bufinfo;
#endif
/* Deal with ioctls passed from the upper-half driver */
switch (cmd)
{
/* Report our preferred buffer size and quantity */
#ifdef CONFIG_AUDIO_DRIVER_SPECIFIC_BUFFERS
case AUDIOIOC_GETBUFFERINFO:
{
audinfo("AUDIOIOC_GETBUFFERINFO:\n");
bufinfo = (FAR struct ap_buffer_info_s *) arg;
bufinfo->buffer_size = CONFIG_ES8388_BUFFER_SIZE;
bufinfo->nbuffers = CONFIG_ES8388_NUM_BUFFERS;
}
break;
#endif
default:
ret = -ENOTTY;
audinfo("Unhandled ioctl: %d\n", cmd);
break;
}
return ret;
}
/****************************************************************************
* Name: es8388_reserve
*
* Description: Reserves a session (the only one we have).
*
* Input Parameters:
* dev - A reference to the lower half state structure.
* session - The current audio session.
*
* Returned Value:
* Returns OK or a negated errno value on failure.
*
****************************************************************************/
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8388_reserve(FAR struct audio_lowerhalf_s *dev,
FAR void **session)
#else
static int es8388_reserve(FAR struct audio_lowerhalf_s *dev)
#endif
{
FAR struct es8388_dev_s *priv = (FAR struct es8388_dev_s *) dev;
int ret = OK;
audinfo("ES8388 Reserve\n");
/* Borrow the APBQ semaphore for thread sync */
ret = nxmutex_lock(&priv->pendlock);
if (ret < 0)
{
return ret;
}
if (priv->reserved)
{
ret = -EBUSY;
}
else
{
/* Initialize the session context */
#ifdef CONFIG_AUDIO_MULTI_SESSION
*session = NULL;
#endif
priv->inflight = 0;
priv->running = false;
priv->paused = false;
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
priv->terminating = false;
#endif
priv->reserved = true;
}
nxmutex_unlock(&priv->pendlock);
return ret;
}
/****************************************************************************
* Name: es8388_release
*
* Description: Releases the session (the only one we have).
*
* Input Parameters:
* dev - A reference to the lower half state structure.
* session - The current audio session.
*
* Returned Value:
* Returns OK or a negated errno value on failure.
*
****************************************************************************/
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8388_release(FAR struct audio_lowerhalf_s *dev,
FAR void *session)
#else
static int es8388_release(FAR struct audio_lowerhalf_s *dev)
#endif
{
FAR struct es8388_dev_s *priv = (FAR struct es8388_dev_s *)dev;
FAR void *value;
int ret;
audinfo("ES8388 Release\n");
/* Join any old worker thread we had created to prevent a memory leak */
if (priv->threadid != 0)
{
pthread_join(priv->threadid, &value);
priv->threadid = 0;
}
/* Borrow the APBQ semaphore for thread sync */
ret = nxmutex_lock(&priv->pendlock);
/* Really we should free any queued buffers here */
priv->reserved = false;
nxmutex_unlock(&priv->pendlock);
return ret;
}
/****************************************************************************
* Name: es8388_audio_output
*
* Description:
* Initialize and configure the ES8388 device as an audio output device.
* This will be mostly used when adding input support.
*
* Input Parameters:
* priv - A reference to the driver state structure.
*
* Returned Value:
* None. No failures are detected.
*
****************************************************************************/
static void es8388_audio_output(FAR struct es8388_dev_s *priv)
{
audinfo("ES8388 set to output mode\n");
priv->audio_mode = ES_MODULE_DAC;
}
/****************************************************************************
* Name: es8388_audio_input
*
* Description:
* Initialize and configure the ES8388 device as an audio input device.
* This will be mostly used when adding input support.
*
* Input Parameters:
* priv - A reference to the driver state structure.
*
* Returned Value:
* None. No failures are detected.
*
****************************************************************************/
static void es8388_audio_input(FAR struct es8388_dev_s *priv)
{
audinfo("ES8388 set to input mode\n");
priv->audio_mode = ES_MODULE_ADC;
}
/****************************************************************************
* Name: es8388_workerthread
*
* This is the thread that feeds data to the chip and keeps the audio
* stream going.
*
* Input Parameters:
* pvarg - The thread arguments.
*
* Returned Value:
* Returns NULL.
*
****************************************************************************/
static void *es8388_workerthread(pthread_addr_t pvarg)
{
FAR struct es8388_dev_s *priv = (struct es8388_dev_s *) pvarg;
struct audio_msg_s msg;
FAR struct ap_buffer_s *apb;
int msglen;
unsigned int prio;
audinfo("ES8388 worker thread starting\n");
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
priv->terminating = false;
#endif
priv->running = true;
/* Loop as long as we are supposed to be running and as long as we have
* buffers in-flight.
*/
while (priv->running || priv->inflight > 0)
{
/* Check if we have been asked to terminate. We have to check if we
* still have buffers in-flight. If we do, then we can't stop until
* birds come back to roost.
*/
if (priv->terminating && priv->inflight <= 0)
{
/* We are IDLE. Break out of the loop and exit. */
break;
}
else
{
/* Check if we can process more audio buffers */
es8388_processbegin(priv);
}
/* Wait for messages from our message queue */
msglen = file_mq_receive(&priv->mq, (FAR char *)&msg,
sizeof(msg), &prio);
/* Handle the case when we return with no message */
if (msglen < sizeof(struct audio_msg_s))
{
auderr("Message too small: %d\n", msglen);
continue;
}
/* Process the message */
switch (msg.msg_id)
{
/* The ISR has requested more data. We will catch this case at
* the top of the loop.
*/
case AUDIO_MSG_DATA_REQUEST:
audinfo("AUDIO_MSG_DATA_REQUEST\n");
break;
/* Stop the playback */
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
case AUDIO_MSG_STOP:
/* Indicate that we are terminating */
audinfo("AUDIO_MSG_STOP: Terminating\n");
priv->terminating = true;
break;
#endif
/* We have a new buffer to process. We will catch this case at
* the top of the loop.
*/
case AUDIO_MSG_ENQUEUE:
audinfo("AUDIO_MSG_ENQUEUE\n");
break;
/* We will wake up from the I2S callback with this message */
case AUDIO_MSG_COMPLETE:
audinfo("AUDIO_MSG_COMPLETE\n");
es8388_returnbuffers(priv);
break;
default:
auderr("Ignoring message ID %d\n", msg.msg_id);
break;
}
}
/* Reset the ES8388 hardware */
es8388_reset(priv);
/* Return any pending buffers in our pending queue */
nxmutex_lock(&priv->pendlock);
while ((apb = (FAR struct ap_buffer_s *)dq_remfirst(&priv->pendq)) != NULL)
{
/* Release our reference to the buffer */
apb_free(apb);
/* Send the buffer back up to the previous level. */
#ifdef CONFIG_AUDIO_MULTI_SESSION
priv->dev.upper(priv->dev.priv, AUDIO_CALLBACK_DEQUEUE, apb, OK, NULL);
#else
priv->dev.upper(priv->dev.priv, AUDIO_CALLBACK_DEQUEUE, apb, OK);
#endif
}
nxmutex_unlock(&priv->pendlock);
/* Return any pending buffers in our done queue */
es8388_returnbuffers(priv);
/* Close the message queue */
file_mq_close(&priv->mq);
file_mq_unlink(priv->mqname);
/* Send an AUDIO_MSG_COMPLETE message to the client */
#ifdef CONFIG_AUDIO_MULTI_SESSION
priv->dev.upper(priv->dev.priv, AUDIO_CALLBACK_COMPLETE, NULL, OK, NULL);
#else
priv->dev.upper(priv->dev.priv, AUDIO_CALLBACK_COMPLETE, NULL, OK);
#endif
audinfo("ES8388 worker thread finishing\n");
return NULL;
}
/****************************************************************************
* Name: es8388_reset
*
* Description:
* Reset and re-initialize the ES8388.
*
* Input Parameters:
* priv - A reference to the driver state structure.
*
* Returned Value:
* None.
*
****************************************************************************/
static void es8388_reset(FAR struct es8388_dev_s *priv)
{
/* Put audio back to its initial configuration */
audinfo("ES8388 reset triggered.\n");
priv->dac_output = CONFIG_ES8388_OUTPUT_CHANNEL;
priv->adc_input = CONFIG_ES8388_INPUT_CHANNEL;
priv->samprate = ES8388_DEFAULT_SAMPRATE;
priv->nchannels = ES8388_DEFAULT_NCHANNELS;
priv->bpsamp = ES8388_DEFAULT_BPSAMP;
#if !defined(CONFIG_AUDIO_EXCLUDE_VOLUME) && !defined(CONFIG_AUDIO_EXCLUDE_BALANCE)
priv->balance = 500; /* Center balance */
#endif
/* Software reset. This puts all ES8388 registers back in their
* default state.
*/
uint8_t regconfig;
es8388_writereg(priv, ES8388_DACCONTROL3,
ES8388_DACMUTE_MUTED |
ES8388_DACLER_NORMAL |
ES8388_DACSOFTRAMP_DISABLE |
ES8388_DACRAMPRATE_4LRCK);
es8388_writereg(priv, ES8388_CONTROL2,
ES8388_PDNVREFBUF_NORMAL |
ES8388_VREFLO_NORMAL |
ES8388_PDNIBIASGEN_NORMAL |
ES8388_PDNANA_NORMAL |
ES8388_LPVREFBUF_LP |
ES8388_LPVCMMOD_NORMAL |
(1 << 6)); /* Default value of undocumented bit */
es8388_writereg(priv, ES8388_CHIPPOWER,
ES8388_DACVREF_PDN_PWRUP |
ES8388_ADCVREF_PDN_PWRUP |
ES8388_DACDLL_PDN_NORMAL |
ES8388_ADCDLL_PDN_NORMAL |
ES8388_DAC_STM_RST_NORMAL |
ES8388_ADC_STM_RST_NORMAL |
ES8388_DAC_DIGPDN_NORMAL |
ES8388_ADC_DIGPDN_NORMAL);
/* Disable the internal DLL to improve 8K sample rate */
es8388_writereg(priv, 0x35, 0xa0);
es8388_writereg(priv, 0x37, 0xd0);
es8388_writereg(priv, 0x39, 0xd0);
es8388_writereg(priv, ES8388_MASTERMODE,
ES8388_BCLKDIV(ES_MCLK_DIV_AUTO) |
ES8388_BCLK_INV_NORMAL |
ES8388_MCLKDIV2_NODIV |
ES8388_MSC_SLAVE);
es8388_writereg(priv, ES8388_DACPOWER,
ES8388_ROUT2_DISABLE |
ES8388_LOUT2_DISABLE |
ES8388_ROUT1_DISABLE |
ES8388_LOUT1_DISABLE |
ES8388_PDNDACR_PWRDN |
ES8388_PDNDACL_PWRDN);
es8388_writereg(priv, ES8388_CONTROL1,
ES8388_VMIDSEL_500K |
ES8388_ENREF_DISABLE |
ES8388_SEQEN_DISABLE |
ES8388_SAMEFS_SAME |
ES8388_DACMCLK_ADCMCLK |
ES8388_LRCM_ISOLATED |
ES8388_SCPRESET_NORMAL);
es8388_writereg(priv, ES8388_DACCONTROL1,
ES8388_DACFORMAT(ES_I2S_NORMAL) |
ES8388_DACWL(ES_WORD_LENGTH_16BITS) |
ES8388_DACLRP_NORM_2ND |
ES8388_DACLRSWAP_NORMAL);
es8388_writereg(priv, ES8388_DACCONTROL2,
ES8388_DACFSRATIO(ES_LCLK_DIV_256) |
ES8388_DACFSMODE_SINGLE);
es8388_writereg(priv, ES8388_DACCONTROL16,
ES8388_RMIXSEL_RIN1 | ES8388_LMIXSEL_LIN1);
es8388_writereg(priv, ES8388_DACCONTROL17,
ES8388_LI2LOVOL(ES8388_MIXER_GAIN_0DB) |
ES8388_LI2LO_DISABLE |
ES8388_LD2LO_ENABLE);
es8388_writereg(priv, ES8388_DACCONTROL20,
ES8388_RI2ROVOL(ES8388_MIXER_GAIN_0DB) |
ES8388_RI2RO_DISABLE |
ES8388_RD2RO_ENABLE);
es8388_writereg(priv, ES8388_DACCONTROL21,
ES8388_DAC_DLL_PWD_NORMAL |
ES8388_ADC_DLL_PWD_NORMAL |
ES8388_MCLK_DIS_NORMAL |
ES8388_OFFSET_DIS_DISABLE |
ES8388_LRCK_SEL_DAC |
ES8388_SLRCK_SAME);
es8388_writereg(priv, ES8388_DACCONTROL23, ES8388_VROI_1_5K);
es8388_writereg(priv, ES8388_DACCONTROL24,
ES8388_LOUT1VOL(ES8388_DAC_CHVOL_DB(0)));
es8388_writereg(priv, ES8388_DACCONTROL25,
ES8388_ROUT1VOL(ES8388_DAC_CHVOL_DB(0)));
es8388_writereg(priv, ES8388_DACCONTROL26,
ES8388_LOUT2VOL(ES8388_DAC_CHVOL_DB(0)));
es8388_writereg(priv, ES8388_DACCONTROL27,
ES8388_ROUT2VOL(ES8388_DAC_CHVOL_DB(0)));
#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
es8388_setmute(priv, ES_MODULE_DAC, true);
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
es8388_setvolume(priv, ES_MODULE_DAC, CONFIG_ES8388_OUTPUT_INITVOLUME);
#endif
if (priv->dac_output == ES8388_DAC_OUTPUT_LINE2)
{
regconfig = ES_DAC_CHANNEL_LOUT1 | ES_DAC_CHANNEL_ROUT1;
}
else if (priv->dac_output == ES8388_DAC_OUTPUT_LINE1)
{
regconfig = ES_DAC_CHANNEL_LOUT2 | ES_DAC_CHANNEL_ROUT2;
}
else
{
regconfig = ES_DAC_CHANNEL_LOUT1 | ES_DAC_CHANNEL_ROUT1 |
ES_DAC_CHANNEL_LOUT2 | ES_DAC_CHANNEL_ROUT2;
}
es8388_writereg(priv, ES8388_DACPOWER, regconfig);
es8388_writereg(priv, ES8388_ADCPOWER,
ES8388_INT1LP_LP |
ES8388_FLASHLP_LP |
ES8388_PDNADCBIASGEN_LP |
ES8388_PDNMICB_PWRDN |
ES8388_PDNADCR_PWRDN |
ES8388_PDNADCL_PWRDN |
ES8388_PDNAINR_PWRDN |
ES8388_PDNAINL_PWRDN);
es8388_setmicgain(priv, 24); /* +24 dB */
if (priv->adc_input == ES8388_ADC_INPUT_LINE1)
{
regconfig = ES_ADC_CHANNEL_LINPUT1_RINPUT1;
}
else if (priv->adc_input == ES8388_ADC_INPUT_LINE2)
{
regconfig = ES_ADC_CHANNEL_LINPUT2_RINPUT2;
}
else
{
regconfig = ES_ADC_CHANNEL_DIFFERENCE;
}
es8388_writereg(priv, ES8388_ADCCONTROL2, regconfig);
es8388_writereg(priv, ES8388_ADCCONTROL3,
(1 << 1) | /* Default value of undocumented bit */
ES8388_TRI_NORMAL |
ES8388_MONOMIX_STEREO |
ES8388_DS_LINPUT1_RINPUT1);
es8388_writereg(priv, ES8388_ADCCONTROL4,
ES8388_ADCFORMAT(ES_I2S_NORMAL) |
ES8388_ADCWL(ES_WORD_LENGTH_16BITS) |
ES8388_ADCLRP_NORM_2ND |
ES8388_DATSEL_LL);
es8388_writereg(priv, ES8388_ADCCONTROL5,
ES8388_ADCFSRATIO(ES_LCLK_DIV_256) |
ES8388_ADCFSMODE_SINGLE);
#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
es8388_setvolume(priv, ES_MODULE_ADC, CONFIG_ES8388_INPUT_INITVOLUME);
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
es8388_setmute(priv, ES_MODULE_ADC, true);
#endif
es8388_writereg(priv, ES8388_ADCPOWER,
ES8388_INT1LP_LP |
ES8388_FLASHLP_NORMAL |
ES8388_PDNADCBIASGEN_NORMAL |
ES8388_PDNMICB_PWRDN |
ES8388_PDNADCR_PWRUP |
ES8388_PDNADCL_PWRUP |
ES8388_PDNAINR_NORMAL |
ES8388_PDNAINL_NORMAL);
/* Stop sequence to avoid noise at boot */
if (priv->audio_mode == ES_MODULE_LINE)
{
es8388_writereg(priv, ES8388_DACCONTROL21,
ES8388_DAC_DLL_PWD_NORMAL |
ES8388_ADC_DLL_PWD_NORMAL |
ES8388_MCLK_DIS_NORMAL |
ES8388_OFFSET_DIS_DISABLE |
ES8388_SLRCK_SAME |
ES8388_LRCK_SEL_DAC);
es8388_writereg(priv, ES8388_DACCONTROL16,
ES8388_RMIXSEL_RIN1 | ES8388_LMIXSEL_LIN1);
es8388_writereg(priv, ES8388_DACCONTROL17,
ES8388_LD2LO_ENABLE |
ES8388_LI2LO_DISABLE |
ES8388_LI2LOVOL(ES8388_MIXER_GAIN_0DB));
es8388_writereg(priv, ES8388_DACCONTROL20,
ES8388_RD2RO_ENABLE |
ES8388_RI2RO_DISABLE |
ES8388_RI2ROVOL(ES8388_MIXER_GAIN_0DB));
goto reset_finish;
}
if (priv->audio_mode == ES_MODULE_DAC ||
priv->audio_mode == ES_MODULE_ADC_DAC)
{
es8388_writereg(priv, ES8388_DACPOWER,
ES8388_ROUT2_DISABLE |
ES8388_LOUT2_DISABLE |
ES8388_ROUT1_DISABLE |
ES8388_LOUT1_DISABLE |
ES8388_PDNDACR_PWRUP |
ES8388_PDNDACL_PWRUP);
}
if (priv->audio_mode == ES_MODULE_ADC ||
priv->audio_mode == ES_MODULE_ADC_DAC)
{
es8388_writereg(priv, ES8388_ADCPOWER,
ES8388_INT1LP_LP |
ES8388_FLASHLP_LP |
ES8388_PDNADCBIASGEN_LP |
ES8388_PDNMICB_PWRDN |
ES8388_PDNADCR_PWRDN |
ES8388_PDNADCL_PWRDN |
ES8388_PDNAINR_PWRDN |
ES8388_PDNAINL_PWRDN);
}
if (priv->audio_mode == ES_MODULE_ADC_DAC)
{
es8388_writereg(priv, ES8388_DACCONTROL21,
ES8388_DAC_DLL_PWD_PWRDN |
ES8388_ADC_DLL_PWD_PWRDN |
ES8388_MCLK_DIS_DISABLE |
ES8388_OFFSET_DIS_DISABLE |
ES8388_LRCK_SEL_DAC |
ES8388_SLRCK_SAME);
}
reset_finish:
#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
es8388_setvolume(priv, ES_MODULE_DAC, CONFIG_ES8388_OUTPUT_INITVOLUME);
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
es8388_setmute(priv, ES_MODULE_DAC, true);
#endif
es8388_dump_registers(&priv->dev, "After reset");
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: es8388_initialize
*
* Description:
* Initialize the ES8388 device.
*
* Input Parameters:
* i2c - An I2C driver instance.
* i2s - An I2S driver instance.
* lower - Persistent board configuration data.
*
* Returned Value:
* A new lower half audio interface for the ES8388 device is returned on
* success; NULL is returned on failure.
*
****************************************************************************/
FAR struct audio_lowerhalf_s *
es8388_initialize(FAR struct i2c_master_s *i2c,
FAR struct i2s_dev_s *i2s,
FAR const struct es8388_lower_s *lower)
{
FAR struct es8388_dev_s *priv;
audinfo("Initializing ES8388\n");
/* Sanity check */
DEBUGASSERT(i2c && i2s && lower);
/* Allocate a ES8388 device structure */
priv = kmm_zalloc(sizeof(struct es8388_dev_s));
if (priv)
{
priv->dev.ops = &g_audioops;
priv->lower = lower;
priv->i2c = i2c;
priv->i2s = i2s;
nxmutex_init(&priv->pendlock);
dq_init(&priv->pendq);
dq_init(&priv->doneq);
audinfo("ES8388: address=%02x frequency=%" PRId32 "\n",
lower->address, lower->frequency);
/* Reset and reconfigure the ES8388 hardware */
es8388_dump_registers(&priv->dev, "Before reset");
es8388_audio_output(priv);
es8388_reset(priv);
return &priv->dev;
}
return NULL;
}
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