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nuttx/drivers/audio/es8311.c
Lucas Saavedra Vaz 8b9dc54a0a drivers/audio: Add support for the ES8311 codec 
Adds support for the ES8311 audio codec by Everest Semiconductor on NuttX. Both output and input are supported.
2023-05-04 18:41:54 -03:00

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/****************************************************************************
* drivers/audio/es8311.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/ioctl.h>
#include <sys/param.h>
#include <sys/types.h>
#include <assert.h>
#include <debug.h>
#include <errno.h>
#include <fcntl.h>
#include <fixedmath.h>
#include <inttypes.h>
#include <math.h>
#include <pthread.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <nuttx/audio/audio.h>
#include <nuttx/audio/es8311.h>
#include <nuttx/audio/i2s.h>
#include <nuttx/clock.h>
#include <nuttx/fs/fs.h>
#include <nuttx/fs/ioctl.h>
#include <nuttx/i2c/i2c_master.h>
#include <nuttx/kmalloc.h>
#include <nuttx/mqueue.h>
#include <nuttx/queue.h>
#include <nuttx/wqueue.h>
#include "es8311.h"
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
#if !defined(CONFIG_ES8311_REGDUMP)
static
#endif /* !CONFIG_ES8311_REGDUMP */
uint8_t es8311_readreg(FAR struct es8311_dev_s *priv, uint8_t regaddr);
static int es8311_writereg(FAR struct es8311_dev_s *priv,
uint8_t regaddr,
uint16_t regval);
#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
static int es8311_setvolume(FAR struct es8311_dev_s *priv,
es_module_e module,
uint16_t volume);
#endif /* CONFIG_AUDIO_EXCLUDE_VOLUME */
static int es8311_getcoeff(FAR struct es8311_dev_s *priv,
uint32_t samplerate);
#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
static int es8311_setmute(FAR struct es8311_dev_s *priv,
es_module_e module,
bool enable);
#endif /* CONFIG_AUDIO_EXCLUDE_MUTE */
static int es8311_setmicgain(FAR struct es8311_dev_s *priv, uint32_t gain);
static int es8311_setbitspersample(FAR struct es8311_dev_s *priv);
static int es8311_setsamplerate(FAR struct es8311_dev_s *priv);
static int es8311_getcaps(FAR struct audio_lowerhalf_s *dev,
int type,
FAR struct audio_caps_s *caps);
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8311_configure(FAR struct audio_lowerhalf_s *dev,
FAR void *session,
FAR const struct audio_caps_s *caps);
#else /* !CONFIG_AUDIO_MULTI_SESSION */
static int es8311_configure(FAR struct audio_lowerhalf_s *dev,
FAR const struct audio_caps_s *caps);
#endif /* !CONFIG_AUDIO_MULTI_SESSION */
static int es8311_shutdown(FAR struct audio_lowerhalf_s *dev);
static void es8311_processdone(FAR struct i2s_dev_s *i2s,
FAR struct ap_buffer_s *apb,
FAR void *arg,
int result);
static void es8311_returnbuffers(FAR struct es8311_dev_s *priv);
static int es8311_processbegin(FAR struct es8311_dev_s *priv);
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8311_start(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
#else /* !CONFIG_AUDIO_MULTI_SESSION */
static int es8311_start(FAR struct audio_lowerhalf_s *dev);
#endif /* !CONFIG_AUDIO_MULTI_SESSION */
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8311_stop(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
#else /* !CONFIG_AUDIO_MULTI_SESSION */
static int es8311_stop(FAR struct audio_lowerhalf_s *dev);
#endif /* !CONFIG_AUDIO_MULTI_SESSION */
#endif /* CONFIG_AUDIO_EXCLUDE_STOP */
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8311_pause(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
static int es8311_resume(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
#else /* !CONFIG_AUDIO_MULTI_SESSION */
static int es8311_pause(FAR struct audio_lowerhalf_s *dev);
static int es8311_resume(FAR struct audio_lowerhalf_s *dev);
#endif /* !CONFIG_AUDIO_MULTI_SESSION */
#endif /* CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME */
static int es8311_enqueuebuffer(FAR struct audio_lowerhalf_s *dev,
FAR struct ap_buffer_s *apb);
static int es8311_cancelbuffer(FAR struct audio_lowerhalf_s *dev,
FAR struct ap_buffer_s *apb);
static int es8311_ioctl(FAR struct audio_lowerhalf_s *dev,
int cmd,
unsigned long arg);
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8311_reserve(FAR struct audio_lowerhalf_s *dev,
FAR void **session);
#else /* !CONFIG_AUDIO_MULTI_SESSION */
static int es8311_reserve(FAR struct audio_lowerhalf_s *dev);
#endif /* !CONFIG_AUDIO_MULTI_SESSION */
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8311_release(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
#else /* !CONFIG_AUDIO_MULTI_SESSION */
static int es8311_release(FAR struct audio_lowerhalf_s *dev);
#endif /* !CONFIG_AUDIO_MULTI_SESSION */
static void *es8311_workerthread(pthread_addr_t pvarg);
static void es8311_audio_output(FAR struct es8311_dev_s *priv);
static void es8311_audio_input(FAR struct es8311_dev_s *priv);
static int es8311_reset(FAR struct es8311_dev_s *priv);
static int es8311_get_mclk_src(void);
/****************************************************************************
* Private Data
****************************************************************************/
static const struct audio_ops_s g_audioops =
{
es8311_getcaps, /* getcaps */
es8311_configure, /* configure */
es8311_shutdown, /* shutdown */
es8311_start, /* start */
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
es8311_stop, /* stop */
#endif /* CONFIG_AUDIO_EXCLUDE_STOP */
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
es8311_pause, /* pause */
es8311_resume, /* resume */
#endif /* CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME */
NULL, /* allocbuffer */
NULL, /* freebuffer */
es8311_enqueuebuffer, /* enqueue_buffer */
es8311_cancelbuffer, /* cancel_buffer */
es8311_ioctl, /* ioctl */
NULL, /* read */
NULL, /* write */
es8311_reserve, /* reserve */
es8311_release /* release */
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: es8311_get_mclk_src
*
* Description:
* Get the MCLK source.
*
* Returned Value:
* ES8311_MCLK_FROM_MCLK_PIN or ES8311_MCLK_FROM_SCLK_PIN.
*
****************************************************************************/
static int es8311_get_mclk_src(void)
{
#ifdef CONFIG_ES8311_SRC_MCLK
return ES8311_MCLK_FROM_MCLK_PIN;
#else
return ES8311_MCLK_FROM_SCLK_PIN;
#endif
}
/****************************************************************************
* Name: es8311_readreg
*
* Description:
* Read the specified 8-bit register from the ES8311 device through I2C.
*
* Input Parameters:
* 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_ES8311_REGDUMP)
static
#endif /* !CONFIG_ES8311_REGDUMP */
uint8_t es8311_readreg(FAR struct es8311_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 /* !CONFIG_I2C_RESET */
auderr("I2C_TRANSFER failed: %d\n", ret);
#endif /* !CONFIG_I2C_RESET */
}
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: es8311_writereg
*
* Description:
* Write the specified 8-bit register to the ES8311 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:
* Returns OK or a negated errno value on failure.
*
****************************************************************************/
static int es8311_writereg(FAR struct es8311_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 /* !CONFIG_I2C_RESET */
auderr("I2C_TRANSFER failed: %d\n", ret);
#endif /* !CONFIG_I2C_RESET */
}
else
{
/* The I2C transfer was successful... break out of the loop and
* return.
*/
audinfo("Write: %02x <- %02x\n", regaddr, regval);
return OK;
}
audinfo("retries=%d regaddr=%02x\n", retries, regaddr);
}
return -EIO;
}
/****************************************************************************
* Name: es8311_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..42).
*
* Returned Value:
* Returns OK or a negated errno value on failure.
*
****************************************************************************/
static int es8311_setmicgain(FAR struct es8311_dev_s *priv, uint32_t gain)
{
int ret;
static const es8311_mic_gain_e gain_map[] =
{
ES8311_MIC_GAIN_0DB,
ES8311_MIC_GAIN_6DB,
ES8311_MIC_GAIN_12DB,
ES8311_MIC_GAIN_18DB,
ES8311_MIC_GAIN_24DB,
ES8311_MIC_GAIN_30DB,
ES8311_MIC_GAIN_36DB,
ES8311_MIC_GAIN_42DB
};
/* Our range is from 0 to 42 dB with steps of 6 dB. We map this to the
* ES8311 gain values.
*/
priv->mic_gain = gain_map[MIN(gain, 42) / 6];
ret = es8311_writereg(priv, ES8311_ADC_REG16, priv->mic_gain);
if (ret < 0)
{
auderr("Failed to set mic gain: %d\n", ret);
}
else
{
audinfo("Set mic gain: %d\n", priv->mic_gain);
}
return ret;
}
/****************************************************************************
* Name: es8311_setvolume
*
* Description:
* Set the right and left volume values in the ES8311 device based on the
* desired volume 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:
* Returns OK or a negated errno value on failure.
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
static int es8311_setvolume(FAR struct es8311_dev_s *priv,
es_module_e module,
uint16_t volume)
{
/* Convert from (0..1000) to (0..200) ln curve to avoid distortion */
uint16_t dblvl = (int16_t) (volume ? (29 * logf(volume)) : 0);
int ret = 0;
/* Set the volume */
if (module == ES_MODULE_DAC || module == ES_MODULE_ADC_DAC)
{
ret |= es8311_writereg(priv, ES8311_DAC_REG32, dblvl);
priv->volume_out = volume;
}
if (module == ES_MODULE_ADC || module == ES_MODULE_ADC_DAC)
{
ret |= es8311_writereg(priv, ES8311_ADC_REG17, dblvl);
priv->volume_in = volume;
}
if (ret < 0)
{
auderr("Failed to set volume.\n");
return -EIO;
}
else
{
audinfo("Volume set to %d\n", volume);
return OK;
}
}
#endif /* CONFIG_AUDIO_EXCLUDE_VOLUME */
/****************************************************************************
* Name: es8311_getcoeff
*
* Description:
* Get the coefficient values for the current MCLK and given sample rate.
*
* Input Parameters:
* priv - A reference to the driver state structure.
* samplerate - The sample rate to be set in the codec.
*
* Returned Value:
* The index of the divider in the es8311_coeff_div array or -EINVAL if
* the combination of MCLK and sample rate is not supported.
*
****************************************************************************/
static int es8311_getcoeff(FAR struct es8311_dev_s *priv,
uint32_t samplerate)
{
int i;
for (i = 0; i < nitems(es8311_coeff_div); i++)
{
if (priv->mclk == es8311_coeff_div[i].mclk &&
samplerate == es8311_coeff_div[i].rate)
{
audinfo("MCLK: %d, samplerate: %d\n", priv->mclk, samplerate);
return i;
}
}
auderr("MCLK = %d and samplerate = %d not supported.\n",
priv->mclk, samplerate);
return -EINVAL;
}
/****************************************************************************
* Name: es8311_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:
* Returns OK or a negated errno value on failure.
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
static int es8311_setmute(FAR struct es8311_dev_s *priv,
es_module_e module,
bool enable)
{
uint8_t reg = 0;
int ret = 0;
audinfo("module=%d, mute=%d\n", module, (int)enable);
priv->mute = enable;
if (module == ES_MODULE_DAC || module == ES_MODULE_ADC_DAC)
{
reg = es8311_readreg(priv, ES8311_DAC_REG31) & 0x9f;
if (enable)
{
ret |= es8311_writereg(priv, ES8311_SYSTEM_REG12, 0x02);
ret |= es8311_writereg(priv, ES8311_DAC_REG31, reg | 0x60);
ret |= es8311_writereg(priv, ES8311_DAC_REG32, 0x00);
ret |= es8311_writereg(priv, ES8311_DAC_REG37, 0x08);
}
else
{
ret |= es8311_writereg(priv, ES8311_DAC_REG31, reg);
ret |= es8311_writereg(priv, ES8311_SYSTEM_REG12, 0x00);
}
}
if (module == ES_MODULE_ADC || module == ES_MODULE_ADC_DAC)
{
reg = es8311_readreg(priv, ES8311_SDPOUT_REG0A) & 0xbf;
ret |= es8311_writereg(priv, ES8311_SDPOUT_REG0A,
reg | ((int) enable << 6));
}
if (ret < 0)
{
auderr("Failed to set mute.\n");
return -EIO;
}
else
{
audinfo("Set mute to: %d\n", (int)enable);
return OK;
}
}
#endif
/****************************************************************************
* Name: es8311_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:
* Returns OK or a negated errno value on failure.
*
****************************************************************************/
static int es8311_setbitspersample(FAR struct es8311_dev_s *priv)
{
uint8_t reg;
uint8_t bit_config;
int ret;
DEBUGASSERT(priv && priv->lower);
switch (priv->bpsamp)
{
case 16:
bit_config = ES_WORD_LENGTH_16BITS;
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 -EINVAL;
}
ret = I2S_RXDATAWIDTH(priv->i2s, priv->bpsamp);
if (ret < 0)
{
auderr("I2S_RXDATAWIDTH failed.\n");
return ret;
}
ret = I2S_TXDATAWIDTH(priv->i2s, priv->bpsamp);
if (ret < 0)
{
auderr("I2S_TXDATAWIDTH failed.\n");
return ret;
}
ret = 0;
if (priv->audio_mode == ES_MODULE_ADC ||
priv->audio_mode == ES_MODULE_ADC_DAC)
{
reg = es8311_readreg(priv, ES8311_SDPOUT_REG0A) & 0xe3;
ret |= es8311_writereg(priv, ES8311_SDPOUT_REG0A,
reg | (bit_config << 2));
}
if (priv->audio_mode == ES_MODULE_DAC ||
priv->audio_mode == ES_MODULE_ADC_DAC)
{
reg = es8311_readreg(priv, ES8311_SDPIN_REG09) & 0xe3;
ret |= es8311_writereg(priv, ES8311_SDPIN_REG09,
reg | (bit_config << 2));
}
if (ret < 0)
{
auderr("Failed to set bits per sample\n");
return -EIO;
}
else
{
audinfo("Bits per sample set to: %d\n", priv->bpsamp);
return OK;
}
}
/****************************************************************************
* Name: es8311_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:
* Returns OK or a negated errno value on failure.
*
****************************************************************************/
static int es8311_setsamplerate(FAR struct es8311_dev_s *priv)
{
DEBUGASSERT(priv && priv->lower);
uint8_t regconfig;
uint8_t datmp;
int coeff_index;
int ret;
priv->mclk = I2S_GETMCLKFREQUENCY(priv->i2s);
coeff_index = es8311_getcoeff(priv, priv->samprate);
if (coeff_index < 0)
{
auderr("Failed to set sample rate: %d\n", -EINVAL);
return -EINVAL;
}
ret = I2S_RXSAMPLERATE(priv->i2s, priv->samprate);
if (ret < 0)
{
auderr("I2S_RXSAMPLERATE failed.\n");
return ret;
}
ret = I2S_TXSAMPLERATE(priv->i2s, priv->samprate);
if (ret < 0)
{
auderr("I2S_TXSAMPLERATE failed.\n");
return ret;
}
ret = 0;
regconfig = es8311_readreg(priv, ES8311_CLK_MANAGER_REG02) & 0x07;
regconfig |= (es8311_coeff_div[coeff_index].pre_div - 1) << 5;
datmp = 0;
switch (es8311_coeff_div[coeff_index].pre_multi)
{
case 1:
datmp = 0;
break;
case 2:
datmp = 1;
break;
case 4:
datmp = 2;
break;
case 8:
datmp = 3;
break;
default:
break;
}
if (es8311_get_mclk_src() == ES8311_MCLK_FROM_SCLK_PIN)
{
datmp = 3; /* DIG_MCLK = LRCK * 256 = BCLK * 8 */
}
regconfig |= (datmp) << 3;
ret |= es8311_writereg(priv, ES8311_CLK_MANAGER_REG02, regconfig);
regconfig = es8311_readreg(priv, ES8311_CLK_MANAGER_REG05) & 0x00;
regconfig |= (es8311_coeff_div[coeff_index].adc_div - 1) << 4;
regconfig |= (es8311_coeff_div[coeff_index].dac_div - 1) << 0;
ret |= es8311_writereg(priv, ES8311_CLK_MANAGER_REG05, regconfig);
regconfig = es8311_readreg(priv, ES8311_CLK_MANAGER_REG03) & 0x80;
regconfig |= es8311_coeff_div[coeff_index].fs_mode << 6;
regconfig |= es8311_coeff_div[coeff_index].adc_osr << 0;
ret |= es8311_writereg(priv, ES8311_CLK_MANAGER_REG03, regconfig);
regconfig = es8311_readreg(priv, ES8311_CLK_MANAGER_REG04) & 0x80;
regconfig |= es8311_coeff_div[coeff_index].dac_osr << 0;
ret |= es8311_writereg(priv, ES8311_CLK_MANAGER_REG04, regconfig);
regconfig = es8311_readreg(priv, ES8311_CLK_MANAGER_REG07) & 0xc0;
regconfig |= es8311_coeff_div[coeff_index].lrck_h << 0;
ret |= es8311_writereg(priv, ES8311_CLK_MANAGER_REG07, regconfig);
regconfig = es8311_readreg(priv, ES8311_CLK_MANAGER_REG08) & 0x00;
regconfig |= es8311_coeff_div[coeff_index].lrck_l << 0;
ret |= es8311_writereg(priv, ES8311_CLK_MANAGER_REG08, regconfig);
regconfig = es8311_readreg(priv, ES8311_CLK_MANAGER_REG06) & 0xe0;
if (es8311_coeff_div[coeff_index].bclk_div < 19)
{
regconfig |= (es8311_coeff_div[coeff_index].bclk_div - 1) << 0;
}
else
{
regconfig |= (es8311_coeff_div[coeff_index].bclk_div) << 0;
}
ret |= es8311_writereg(priv, ES8311_CLK_MANAGER_REG06, regconfig);
if (ret < 0)
{
auderr("Failed to set sample rate.\n");
return -EIO;
}
else
{
audinfo("Sample rate set to: %d.\n", priv->samprate);
return OK;
}
}
/****************************************************************************
* Name: es8311_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 es8311_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);
/* 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 = 1; /* Mono output */
switch (caps->ac_subtype)
{
case AUDIO_TYPE_QUERY:
/* 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 = 1;
switch (caps->ac_subtype)
{
case AUDIO_TYPE_QUERY:
/* Report the Sample rates we support */
/* 8kHz is hardware dependent */
caps->ac_controls.b[0] =
AUDIO_SAMP_RATE_11K | AUDIO_SAMP_RATE_16K |
AUDIO_SAMP_RATE_22K | AUDIO_SAMP_RATE_32K |
AUDIO_SAMP_RATE_44K | AUDIO_SAMP_RATE_48K;
caps->ac_controls.b[1] = 0;
break;
default:
break;
}
break;
case AUDIO_TYPE_INPUT:
caps->ac_channels = 1;
switch (caps->ac_subtype)
{
case AUDIO_TYPE_QUERY:
/* Report supported input sample rates */
caps->ac_controls.b[0] =
AUDIO_SAMP_RATE_11K | AUDIO_SAMP_RATE_16K |
AUDIO_SAMP_RATE_22K | AUDIO_SAMP_RATE_32K |
AUDIO_SAMP_RATE_44K | AUDIO_SAMP_RATE_48K;
caps->ac_controls.b[1] = 0;
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_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: es8311_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 es8311_configure(FAR struct audio_lowerhalf_s *dev,
FAR void *session,
FAR const struct audio_caps_s *caps)
#else /* !CONFIG_AUDIO_MULTI_SESSION */
static int es8311_configure(FAR struct audio_lowerhalf_s *dev,
FAR const struct audio_caps_s *caps)
#endif /* !CONFIG_AUDIO_MULTI_SESSION */
{
FAR struct es8311_dev_s *priv = (FAR struct es8311_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)
{
es8311_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);
es8311_setmute(priv, ES_MODULE_DAC, mute);
}
break;
#endif /* CONFIG_AUDIO_EXCLUDE_MUTE */
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);
es8311_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;
/* The codec can take stereo audio and play only one channel */
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] != 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->bpsamp = caps->ac_controls.b[2];
es8311_audio_output(priv);
ret |= es8311_reset(priv);
es8311_setsamplerate(priv);
es8311_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;
/* The codec can take stereo audio and play only one channel */
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] != 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->bpsamp = caps->ac_controls.b[2];
es8311_audio_input(priv);
es8311_reset(priv);
es8311_setsamplerate(priv);
es8311_setbitspersample(priv);
ret = OK;
}
break;
case AUDIO_TYPE_PROCESSING:
break;
}
return ret;
}
/****************************************************************************
* Name: es8311_shutdown
*
* Description:
* Shutdown the ES8311 chip and reset it.
*
* Input Parameters:
* dev - A reference to the lower half state structure.
*
* Returned Value:
* Returns OK.
*
****************************************************************************/
static int es8311_shutdown(FAR struct audio_lowerhalf_s *dev)
{
FAR struct es8311_dev_s *priv = (FAR struct es8311_dev_s *)dev;
DEBUGASSERT(priv);
audinfo("Shutdown triggered\n");
/* Now issue a software reset. This puts all ES8311 registers back in
* their default state.
*/
es8311_reset(priv);
return OK;
}
/****************************************************************************
* Name: es8311_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 es8311_processdone(FAR struct i2s_dev_s *i2s,
FAR struct ap_buffer_s *apb,
FAR void *arg,
int result)
{
FAR struct es8311_dev_s *priv = (FAR struct es8311_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_ES8311_MSG_PRIO);
if (ret < 0)
{
auderr("file_mq_send failed: %d\n", ret);
}
}
/****************************************************************************
* Name: es8311_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 es8311_returnbuffers(FAR struct es8311_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 /* !CONFIG_AUDIO_MULTI_SESSION */
priv->dev.upper(priv->dev.priv, AUDIO_CALLBACK_DEQUEUE, apb, OK);
#endif /* !CONFIG_AUDIO_MULTI_SESSION */
flags = enter_critical_section();
}
leave_critical_section(flags);
}
/****************************************************************************
* Name: es8311_processbegin
*
* Description:
* Start the transfer an audio buffer to the ES8311 via I2S. This
* will not wait for the transfer to complete but will return immediately.
* the es8311_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 es8311_processbegin(FAR struct es8311_dev_s *priv)
{
FAR struct ap_buffer_s *apb;
irqstate_t flags;
uint32_t timeout;
int ret;
/* Loop while there are audio buffers to be sent and we have few than
* CONFIG_ES8311_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_ES8311_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
*
* 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).
* So this can be simplifies to (milliseconds):
*
* = (buffer_size << 14) / bpsamp / samplerate
*/
timeout = MSEC2TICK(((uint32_t)(apb->nbytes - apb->curbyte) << 14) /
(uint32_t)priv->samprate / (uint32_t)priv->bpsamp);
if (priv->audio_mode == ES_MODULE_DAC)
{
ret = I2S_SEND(priv->i2s, apb, es8311_processdone,
priv, timeout);
}
else
{
ret = I2S_RECEIVE(priv->i2s, apb, es8311_processdone,
priv, timeout);
}
if (ret < 0)
{
auderr("I2S transfer failed: %d\n", ret);
break;
}
}
nxmutex_unlock(&priv->pendlock);
return ret;
}
/****************************************************************************
* Name: es8311_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 es8311_start(FAR struct audio_lowerhalf_s *dev, FAR void *session)
#else /* !CONFIG_AUDIO_MULTI_SESSION */
static int es8311_start(FAR struct audio_lowerhalf_s *dev)
#endif /* !CONFIG_AUDIO_MULTI_SESSION */
{
FAR struct es8311_dev_s *priv = (FAR struct es8311_dev_s *)dev;
struct sched_param sparam;
struct mq_attr attr;
pthread_attr_t tattr;
FAR void *value;
int ret = OK;
uint8_t dac_iface;
uint8_t adc_iface;
audinfo("ES8311 Start\n");
if (priv->audio_mode == ES_MODULE_LINE)
{
auderr("The codec ES8311 doesn't support ES_MODULE_LINE mode");
return -EINVAL;
}
if (priv->audio_mode == ES_MODULE_ADC ||
priv->audio_mode == ES_MODULE_ADC_DAC)
{
adc_iface = es8311_readreg(priv, ES8311_SDPOUT_REG0A) & 0xbf;
ret |= es8311_writereg(priv, ES8311_SDPOUT_REG0A, adc_iface);
}
if (priv->audio_mode == ES_MODULE_DAC ||
priv->audio_mode == ES_MODULE_ADC_DAC)
{
dac_iface = es8311_readreg(priv, ES8311_SDPIN_REG09) & 0xbf;
ret |= es8311_writereg(priv, ES8311_SDPIN_REG09, dac_iface);
}
ret |= es8311_writereg(priv, ES8311_ADC_REG17, 0xbf);
ret |= es8311_writereg(priv, ES8311_SYSTEM_REG0E, 0x02);
ret |= es8311_writereg(priv, ES8311_SYSTEM_REG12, 0x00);
ret |= es8311_writereg(priv, ES8311_SYSTEM_REG14, 0x1a);
ret |= es8311_writereg(priv, ES8311_SYSTEM_REG0D, 0x01);
ret |= es8311_writereg(priv, ES8311_ADC_REG15, 0x40);
ret |= es8311_writereg(priv, ES8311_DAC_REG37, 0x48);
ret |= es8311_writereg(priv, ES8311_GP_REG45, 0x00);
/* Set internal reference signal (ADCL + DACR) */
ret |= es8311_writereg(priv, ES8311_GPIO_REG44, 0x50);
if (ret < 0)
{
auderr("Failed to start operation.\n");
return -EIO;
}
else
{
audinfo("Operation has been started.\n");
}
/* 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_ES8311_WORKER_STACKSIZE);
audinfo("Starting worker thread\n");
ret = pthread_create(&priv->threadid, &tattr, es8311_workerthread,
(pthread_addr_t)priv);
if (ret != OK)
{
auderr("pthread_create failed: %d\n", ret);
}
else
{
pthread_setname_np(priv->threadid, "es8311");
audinfo("Created worker thread\n");
}
return ret;
}
/****************************************************************************
* Name: es8311_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 or a negated errno value on failure.
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8311_stop(FAR struct audio_lowerhalf_s *dev, FAR void *session)
#else /* !CONFIG_AUDIO_MULTI_SESSION */
static int es8311_stop(FAR struct audio_lowerhalf_s *dev)
#endif /* !CONFIG_AUDIO_MULTI_SESSION */
{
FAR struct es8311_dev_s *priv = (FAR struct es8311_dev_s *)dev;
struct audio_msg_s term_msg;
FAR void *value;
int ret = 0;
uint8_t dac_iface;
uint8_t adc_iface;
audinfo("ES8311 Stop\n");
if (priv->audio_mode == ES_MODULE_ADC ||
priv->audio_mode == ES_MODULE_ADC_DAC)
{
adc_iface = es8311_readreg(priv, ES8311_SDPOUT_REG0A) | 0x40;
ret |= es8311_writereg(priv, ES8311_SDPOUT_REG0A, adc_iface);
}
if (priv->audio_mode == ES_MODULE_DAC ||
priv->audio_mode == ES_MODULE_ADC_DAC)
{
dac_iface = es8311_readreg(priv, ES8311_SDPIN_REG09) | 0x40;
ret |= es8311_writereg(priv, ES8311_SDPIN_REG09, dac_iface);
}
ret |= es8311_writereg(priv, ES8311_DAC_REG32, 0x00);
ret |= es8311_writereg(priv, ES8311_ADC_REG17, 0x00);
ret |= es8311_writereg(priv, ES8311_SYSTEM_REG0E, 0xff);
ret |= es8311_writereg(priv, ES8311_SYSTEM_REG12, 0x02);
ret |= es8311_writereg(priv, ES8311_SYSTEM_REG14, 0x00);
ret |= es8311_writereg(priv, ES8311_SYSTEM_REG0D, 0xfa);
ret |= es8311_writereg(priv, ES8311_ADC_REG15, 0x00);
ret |= es8311_writereg(priv, ES8311_DAC_REG37, 0x08);
ret |= es8311_writereg(priv, ES8311_GP_REG45, 0x01);
/* 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_ES8311_MSG_PRIO);
/* Join the worker thread */
pthread_join(priv->threadid, &value);
priv->threadid = 0;
es8311_dump_registers(&priv->dev, "After stop");
if (ret < 0)
{
auderr("Failed to stop operation.\n");
}
else
{
audinfo("Operation has been stopped.\n");
}
return ret;
}
#endif /* CONFIG_AUDIO_EXCLUDE_STOP */
/****************************************************************************
* Name: es8311_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 or a negated errno value on failure.
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8311_pause(FAR struct audio_lowerhalf_s *dev, FAR void *session)
#else /* !CONFIG_AUDIO_MULTI_SESSION */
static int es8311_pause(FAR struct audio_lowerhalf_s *dev)
#endif /* !CONFIG_AUDIO_MULTI_SESSION */
{
FAR struct es8311_dev_s *priv = (FAR struct es8311_dev_s *)dev;
int ret = OK;
audinfo("ES8311 Pause\n");
if (priv->running && !priv->paused)
{
priv->paused = true;
#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
ret = es8311_setmute(priv, priv->audio_mode, true);
#endif
}
if (ret < 0)
{
auderr("Failed to pause operation.\n");
}
else
{
audinfo("Operation has been paused.\n");
}
return ret;
}
#endif /* CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME */
/****************************************************************************
* Name: es8311_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 or a negated errno value on failure.
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8311_resume(FAR struct audio_lowerhalf_s *dev,
FAR void *session)
#else /* !CONFIG_AUDIO_MULTI_SESSION */
static int es8311_resume(FAR struct audio_lowerhalf_s *dev)
#endif /* !CONFIG_AUDIO_MULTI_SESSION */
{
FAR struct es8311_dev_s *priv = (FAR struct es8311_dev_s *)dev;
int ret = OK;
audinfo("ES8311 Resume\n");
if (priv->running && priv->paused)
{
priv->paused = false;
#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
ret = es8311_setmute(priv, priv->audio_mode, false);
#endif /* CONFIG_AUDIO_EXCLUDE_MUTE */
es8311_processbegin(priv);
}
if (ret < 0)
{
auderr("Failed to resume operation.\n");
}
else
{
audinfo("Operation has been resumed.\n");
}
return ret;
}
#endif /* CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME */
/****************************************************************************
* Name: es8311_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 es8311_enqueuebuffer(FAR struct audio_lowerhalf_s *dev,
FAR struct ap_buffer_s *apb)
{
FAR struct es8311_dev_s *priv = (FAR struct es8311_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_ES8311_MSG_PRIO);
if (ret < 0)
{
auderr("file_mq_send failed: %d\n", ret);
}
}
return ret;
}
/****************************************************************************
* Name: es8311_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 es8311_cancelbuffer(FAR struct audio_lowerhalf_s *dev,
FAR struct ap_buffer_s *apb)
{
audinfo("Cancelled apb=%p\n", apb);
return OK;
}
/****************************************************************************
* Name: es8311_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 es8311_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 /* CONFIG_AUDIO_DRIVER_SPECIFIC_BUFFERS */
/* 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_ES8311_BUFFER_SIZE;
bufinfo->nbuffers = CONFIG_ES8311_NUM_BUFFERS;
}
break;
#endif /* CONFIG_AUDIO_DRIVER_SPECIFIC_BUFFERS */
default:
ret = -ENOTTY;
audinfo("Unhandled ioctl: %d\n", cmd);
break;
}
return ret;
}
/****************************************************************************
* Name: es8311_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 es8311_reserve(FAR struct audio_lowerhalf_s *dev,
FAR void **session)
#else /* !CONFIG_AUDIO_MULTI_SESSION */
static int es8311_reserve(FAR struct audio_lowerhalf_s *dev)
#endif /* !CONFIG_AUDIO_MULTI_SESSION */
{
FAR struct es8311_dev_s *priv = (FAR struct es8311_dev_s *) dev;
int ret = OK;
audinfo("ES8311 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 /* CONFIG_AUDIO_MULTI_SESSION */
priv->inflight = 0;
priv->running = false;
priv->paused = false;
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
priv->terminating = false;
#endif /* CONFIG_AUDIO_EXCLUDE_STOP */
priv->reserved = true;
}
nxmutex_unlock(&priv->pendlock);
return ret;
}
/****************************************************************************
* Name: es8311_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 es8311_release(FAR struct audio_lowerhalf_s *dev,
FAR void *session)
#else /* !CONFIG_AUDIO_MULTI_SESSION */
static int es8311_release(FAR struct audio_lowerhalf_s *dev)
#endif /* !CONFIG_AUDIO_MULTI_SESSION */
{
FAR struct es8311_dev_s *priv = (FAR struct es8311_dev_s *)dev;
FAR void *value;
int ret;
audinfo("ES8311 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: es8311_audio_output
*
* Description:
* Initialize and configure the ES8311 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 es8311_audio_output(FAR struct es8311_dev_s *priv)
{
audinfo("ES8311 set to output mode\n");
priv->audio_mode = ES_MODULE_DAC;
}
/****************************************************************************
* Name: es8311_audio_input
*
* Description:
* Initialize and configure the ES8311 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 es8311_audio_input(FAR struct es8311_dev_s *priv)
{
audinfo("ES8311 set to input mode\n");
priv->audio_mode = ES_MODULE_ADC;
}
/****************************************************************************
* Name: es8311_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 *es8311_workerthread(pthread_addr_t pvarg)
{
FAR struct es8311_dev_s *priv = (struct es8311_dev_s *) pvarg;
struct audio_msg_s msg;
FAR struct ap_buffer_s *apb;
int msglen;
unsigned int prio;
audinfo("ES8311 worker thread starting\n");
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
priv->terminating = false;
#endif /* CONFIG_AUDIO_EXCLUDE_STOP */
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 */
es8311_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 /* CONFIG_AUDIO_EXCLUDE_STOP */
/* 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");
es8311_returnbuffers(priv);
break;
default:
auderr("Ignoring message ID %d\n", msg.msg_id);
break;
}
}
/* Reset the ES8311 hardware */
es8311_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 /* !CONFIG_AUDIO_MULTI_SESSION */
priv->dev.upper(priv->dev.priv, AUDIO_CALLBACK_DEQUEUE, apb, OK);
#endif /* !CONFIG_AUDIO_MULTI_SESSION */
}
nxmutex_unlock(&priv->pendlock);
/* Return any pending buffers in our done queue */
es8311_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 /* !CONFIG_AUDIO_MULTI_SESSION */
priv->dev.upper(priv->dev.priv, AUDIO_CALLBACK_COMPLETE, NULL, OK);
#endif /* !CONFIG_AUDIO_MULTI_SESSION */
audinfo("ES8311 worker thread finishing\n");
return NULL;
}
/****************************************************************************
* Name: es8311_reset
*
* Description:
* Reset and re-initialize the ES8311.
*
* Input Parameters:
* priv - A reference to the driver state structure.
*
* Returned Value:
* OK on success; a negated errno value on failure.
*
****************************************************************************/
static int es8311_reset(FAR struct es8311_dev_s *priv)
{
/* Put audio back to its initial configuration */
audinfo("ES8311 reset triggered.\n");
priv->samprate = ES8311_DEFAULT_SAMPRATE;
priv->bpsamp = ES8311_DEFAULT_BPSAMP;
/* Software reset. This puts all ES8311 registers back in their
* default state.
*/
uint8_t regconfig;
int ret = 0;
ret |= es8311_writereg(priv, ES8311_CLK_MANAGER_REG01, 0x30);
ret |= es8311_writereg(priv, ES8311_CLK_MANAGER_REG02, 0x00);
ret |= es8311_writereg(priv, ES8311_CLK_MANAGER_REG03, 0x10);
ret |= es8311_writereg(priv, ES8311_ADC_REG16, 0x24);
ret |= es8311_writereg(priv, ES8311_CLK_MANAGER_REG04, 0x10);
ret |= es8311_writereg(priv, ES8311_CLK_MANAGER_REG05, 0x00);
ret |= es8311_writereg(priv, ES8311_SYSTEM_REG0B, 0x00);
ret |= es8311_writereg(priv, ES8311_SYSTEM_REG0C, 0x00);
ret |= es8311_writereg(priv, ES8311_SYSTEM_REG10, 0x1f);
ret |= es8311_writereg(priv, ES8311_SYSTEM_REG11, 0x7f);
ret |= es8311_writereg(priv, ES8311_RESET_REG00, 0x80);
regconfig = es8311_readreg(priv, ES8311_RESET_REG00);
regconfig &= 0xbf;
ret |= es8311_writereg(priv, ES8311_RESET_REG00, regconfig);
ret |= es8311_writereg(priv, ES8311_CLK_MANAGER_REG01, 0x3f);
if (es8311_get_mclk_src() == ES8311_MCLK_FROM_MCLK_PIN)
{
regconfig = es8311_readreg(priv, ES8311_CLK_MANAGER_REG01);
regconfig &= 0x7f;
ret |= es8311_writereg(priv, ES8311_CLK_MANAGER_REG01, regconfig);
}
else
{
regconfig = es8311_readreg(priv, ES8311_CLK_MANAGER_REG01);
regconfig |= 0x80;
ret |= es8311_writereg(priv, ES8311_CLK_MANAGER_REG01, regconfig);
}
ret |= es8311_setsamplerate(priv);
ret |= es8311_setbitspersample(priv);
regconfig = es8311_readreg(priv, ES8311_CLK_MANAGER_REG01);
regconfig &= ~(0x40);
ret |= es8311_writereg(priv, ES8311_CLK_MANAGER_REG01, regconfig);
regconfig = es8311_readreg(priv, ES8311_CLK_MANAGER_REG06);
regconfig &= ~(0x20);
ret |= es8311_writereg(priv, ES8311_CLK_MANAGER_REG06, regconfig);
ret |= es8311_writereg(priv, ES8311_SYSTEM_REG13, 0x10);
ret |= es8311_writereg(priv, ES8311_ADC_REG1B, 0x0a);
ret |= es8311_writereg(priv, ES8311_ADC_REG1C, 0x6a);
ret |= es8311_setvolume(priv, ES_MODULE_ADC,
CONFIG_ES8311_INPUT_INITVOLUME);
ret |= es8311_setvolume(priv, ES_MODULE_DAC,
CONFIG_ES8311_OUTPUT_INITVOLUME);
es8311_dump_registers(&priv->dev, "After reset");
if (ret < 0)
{
auderr("Failed to reset the ES8311.\n");
return -EIO;
}
else
{
audinfo("ES8311 reset complete.\n");
return OK;
}
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: es8311_initialize
*
* Description:
* Initialize the ES8311 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 ES8311 device is returned on
* success; NULL is returned on failure.
*
****************************************************************************/
FAR struct audio_lowerhalf_s *
es8311_initialize(FAR struct i2c_master_s *i2c,
FAR struct i2s_dev_s *i2s,
FAR const struct es8311_lower_s *lower)
{
FAR struct es8311_dev_s *priv;
audinfo("Initializing ES8311\n");
/* Sanity check */
DEBUGASSERT(i2c && i2s && lower);
/* Allocate a ES8311 device structure */
priv = (FAR struct es8311_dev_s *)kmm_zalloc(sizeof(struct es8311_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("ES8311: address=%02x frequency=%" PRId32 "\n",
lower->address, lower->frequency);
/* Reset and reconfigure the ES8311 hardware */
es8311_dump_registers(&priv->dev, "Before reset");
es8311_audio_output(priv);
es8311_reset(priv);
audinfo("ES8311 initialized.\n");
return &priv->dev;
}
return NULL;
}
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