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apache / nuttx / a4aad284eb1ea78f3700d49cf7caedf291e81b04 / . / drivers / audio / cs43l22.c
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/****************************************************************************
* drivers/audio/cs43l22.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 <fixedmath.h>
#include <debug.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/cs43l22.h>
#include "cs43l22.h"
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
#if !defined(CONFIG_CS43L22_REGDUMP) && !defined(CONFIG_CS43L22_CLKDEBUG)
static
#endif
uint8_t cs43l22_readreg(FAR struct cs43l22_dev_s *priv, uint8_t regaddr);
static void cs43l22_writereg(FAR struct cs43l22_dev_s *priv, uint8_t regaddr,
uint8_t regval);
#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
static void cs43l22_setvolume(FAR struct cs43l22_dev_s *priv,
uint16_t volume, bool mute);
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_TONE
static void cs43l22_setbass(FAR struct cs43l22_dev_s *priv,
uint8_t bass);
static void cs43l22_settreble(FAR struct cs43l22_dev_s *priv,
uint8_t treble);
#endif
static void cs43l22_setdatawidth(FAR struct cs43l22_dev_s *priv);
static void cs43l22_setbitrate(FAR struct cs43l22_dev_s *priv);
/* Audio lower half methods (and close friends) */
static int cs43l22_getcaps(FAR struct audio_lowerhalf_s *dev, int type,
FAR struct audio_caps_s *caps);
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int cs43l22_configure(FAR struct audio_lowerhalf_s *dev,
FAR void *session,
FAR const struct audio_caps_s *caps);
#else
static int cs43l22_configure(FAR struct audio_lowerhalf_s *dev,
FAR const struct audio_caps_s *caps);
#endif
static int cs43l22_shutdown(FAR struct audio_lowerhalf_s *dev);
static void cs43l22_senddone(FAR struct i2s_dev_s *i2s,
FAR struct ap_buffer_s *apb, FAR void *arg,
int result);
static void cs43l22_returnbuffers(FAR struct cs43l22_dev_s *priv);
static int cs43l22_sendbuffer(FAR struct cs43l22_dev_s *priv);
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int cs43l22_start(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
#else
static int cs43l22_start(FAR struct audio_lowerhalf_s *dev);
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int cs43l22_stop(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
#else
static int cs43l22_stop(FAR struct audio_lowerhalf_s *dev);
#endif
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int cs43l22_pause(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
static int cs43l22_resume(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
#else
static int cs43l22_pause(FAR struct audio_lowerhalf_s *dev);
static int cs43l22_resume(FAR struct audio_lowerhalf_s *dev);
#endif
#endif
static int cs43l22_enqueuebuffer(FAR struct audio_lowerhalf_s *dev,
FAR struct ap_buffer_s *apb);
static int cs43l22_cancelbuffer(FAR struct audio_lowerhalf_s *dev,
FAR struct ap_buffer_s *apb);
static int cs43l22_ioctl(FAR struct audio_lowerhalf_s *dev, int cmd,
unsigned long arg);
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int cs43l22_reserve(FAR struct audio_lowerhalf_s *dev,
FAR void **session);
#else
static int cs43l22_reserve(FAR struct audio_lowerhalf_s *dev);
#endif
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int cs43l22_release(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
#else
static int cs43l22_release(FAR struct audio_lowerhalf_s *dev);
#endif
/* Interrupt handling an worker thread */
#ifdef CS43L22_USE_FFLOCK_INT
static void cs43l22_interrupt_work(FAR void *arg);
static int cs43l22_interrupt(FAR const struct cs43l22_lower_s *lower,
FAR void *arg);
#endif
static void *cs43l22_workerthread(pthread_addr_t pvarg);
/* Initialization */
static void cs43l22_audio_output(FAR struct cs43l22_dev_s *priv);
#if 0 /* Not used */
static void cs43l22_audio_input(FAR struct cs43l22_dev_s *priv);
#endif
#ifdef CS43L22_USE_FFLOCK_INT
static void cs43l22_configure_ints(FAR struct cs43l22_dev_s *priv);
#else
# define cs43l22_configure_ints(p)
#endif
static void cs43l22_reset(FAR struct cs43l22_dev_s *priv);
/****************************************************************************
* Private Data
****************************************************************************/
static const struct audio_ops_s g_audioops =
{
cs43l22_getcaps, /* getcaps */
cs43l22_configure, /* configure */
cs43l22_shutdown, /* shutdown */
cs43l22_start, /* start */
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
cs43l22_stop, /* stop */
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
cs43l22_pause, /* pause */
cs43l22_resume, /* resume */
#endif
NULL, /* allocbuffer */
NULL, /* freebuffer */
cs43l22_enqueuebuffer, /* enqueue_buffer */
cs43l22_cancelbuffer, /* cancel_buffer */
cs43l22_ioctl, /* ioctl */
NULL, /* read */
NULL, /* write */
cs43l22_reserve, /* reserve */
cs43l22_release /* release */
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: cs43l22_readreg
*
* Description:
* Read the specified 16-bit register from the CS43L22 device.
*
****************************************************************************/
#if !defined(CONFIG_CS43L22_REGDUMP) && !defined(CONFIG_CS43L22_CLKDEBUG)
static
#endif
uint8_t cs43l22_readreg(FAR struct cs43l22_dev_s *priv, uint8_t regaddr)
{
int retries;
/* Try up to three times to read the register */
for (retries = 1; 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("ERROR: I2C_RESET failed: %d\n", ret);
break;
}
#else
auderr("ERROR: 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: cs43l22_writereg
*
* Description:
* Write the specified 16-bit register to the CS43L22 device.
*
****************************************************************************/
static void
cs43l22_writereg(FAR struct cs43l22_dev_s *priv, uint8_t regaddr,
uint8_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 read the register */
for (retries = 1; 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("ERROR: I2C_RESET failed: %d\n", ret);
break;
}
#else
auderr("ERROR: I2C_TRANSFER failed: %d\n", ret);
#endif
}
else
{
/* The I2C transfer was successful... break out of the loop and
* return the value read.
*/
audinfo("Write: %02x <- %02x\n", regaddr, regval);
return;
}
audinfo("retries=%d regaddr=%02x\n", retries, regaddr);
}
}
/****************************************************************************
* Name: cs43l22_setvolume
*
* Description:
* Set the right and left volume values in the CS43L22 device based on the
* current volume and balance settings.
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
static void
cs43l22_setvolume(FAR struct cs43l22_dev_s *priv, uint16_t volume, bool mute)
{
uint32_t leftlevel;
uint32_t rightlevel;
uint8_t regval;
audinfo("volume=%u mute=%u\n", volume, mute);
#ifndef CONFIG_AUDIO_EXCLUDE_BALANCE
/* Calculate the left channel volume level {0..1000} */
if (priv->balance <= 500)
{
leftlevel = volume;
}
else if (priv->balance == 1000)
{
leftlevel = 0;
}
else
{
leftlevel = ((((1000 - priv->balance) * 100) / 500) * volume) / 100;
}
/* Calculate the right channel volume level {0..1000} */
if (priv->balance >= 500)
{
rightlevel = volume;
}
else if (priv->balance == 0)
{
rightlevel = 0;
}
else
{
rightlevel = (((priv->balance * 100) / 500) * volume) / 100;
}
# else
leftlevel = priv->volume;
rightlevel = priv->volume;
# endif
/* Set the volume */
regval = (rightlevel + 0x19) & 0xff;
cs43l22_writereg(priv, CS43L22_MS_VOL_CTRL_A, regval);
regval = ((leftlevel + 0x19) & 0xff);
cs43l22_writereg(priv, CS43L22_MS_VOL_CTRL_B, regval);
#if 0
regval = (rightlevel + 0x01) & 0xff;
cs43l22_writereg(priv, CS43L22_HP_VOL_CTRL_A, regval);
regval = (leftlevel + 0x01) & 0xff;
cs43l22_writereg(priv, CS43L22_HP_VOL_CTRL_B, regval);
#endif
regval = cs43l22_readreg(priv, CS43L22_PLAYBACK_CTRL2);
if (mute)
{
regval |= (CS43L22_HPAMUTE | CS43L22_HPBMUTE);
}
else
{
regval &= ~(CS43L22_HPAMUTE | CS43L22_HPBMUTE);
}
cs43l22_writereg(priv, CS43L22_PLAYBACK_CTRL2, regval);
/* Remember the volume level and mute settings */
priv->volume = volume;
priv->mute = mute;
}
#endif /* CONFIG_AUDIO_EXCLUDE_VOLUME */
/****************************************************************************
* Name: cs43l22_setbass
*
* Description:
* Set the bass level.
*
* The level and range are in whole percentage levels (0-100).
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_TONE
static void cs43l22_setbass(FAR struct cs43l22_dev_s *priv, uint8_t bass)
{
audinfo("bass=%u\n", bass);
#warning Missing logic
}
#endif /* CONFIG_AUDIO_EXCLUDE_TONE */
/****************************************************************************
* Name: cs43l22_settreble
*
* Description:
* Set the treble level .
*
* The level and range are in whole percentage levels (0-100).
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_TONE
static void cs43l22_settreble(FAR struct cs43l22_dev_s *priv, uint8_t treble)
{
audinfo("treble=%u\n", treble);
#warning Missing logic
}
#endif /* CONFIG_AUDIO_EXCLUDE_TONE */
/****************************************************************************
* Name: cs43l22_setdatawidth
*
* Description:
* Set the 8- or 16-bit data modes
*
****************************************************************************/
static void cs43l22_setdatawidth(FAR struct cs43l22_dev_s *priv)
{
if (priv->bpsamp == 16)
{
/* Reset default default setting */
priv->i2s->ops->i2s_txdatawidth(priv->i2s, 16);
}
else
{
/* This should select 8-bit with no companding */
priv->i2s->ops->i2s_txdatawidth(priv->i2s, 8);
}
}
/****************************************************************************
* Name: cs43l22_setbitrate
*
****************************************************************************/
static void cs43l22_setbitrate(FAR struct cs43l22_dev_s *priv)
{
DEBUGASSERT(priv && priv->lower);
priv->i2s->ops->i2s_txsamplerate(priv->i2s, priv->samprate);
audinfo("sample rate=%u nchannels=%u bpsamp=%u\n",
priv->samprate, priv->nchannels, priv->bpsamp);
}
/****************************************************************************
* Name: cs43l22_getcaps
*
* Description:
* Get the audio device capabilities
*
****************************************************************************/
static int cs43l22_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("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 = 2; /* Stereo output */
switch (caps->ac_subtype)
{
case AUDIO_TYPE_QUERY:
/* We don't decode any formats! Only something above us in
* the audio stream can perform decoding on our behalf.
*/
/* The types of audio units we implement */
caps->ac_controls.b[0] =
AUDIO_TYPE_OUTPUT | AUDIO_TYPE_FEATURE |
AUDIO_TYPE_PROCESSING;
break;
case AUDIO_FMT_MIDI:
/* We only support Format 0 */
caps->ac_controls.b[0] = AUDIO_SUBFMT_END;
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 */
caps->ac_controls.b[0] =
AUDIO_SAMP_RATE_8K | 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;
case AUDIO_FMT_MP3:
case AUDIO_FMT_WMA:
case AUDIO_FMT_PCM:
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_BASS |
AUDIO_FU_TREBLE;
caps->ac_controls.b[1] = AUDIO_FU_BALANCE >> 8;
}
else
{
/* TODO: Do we need to provide specific info for the Feature
* Units, such as volume setting ranges, etc.?
*/
}
break;
/* Provide capabilities of our PROCESSING unit */
case AUDIO_TYPE_PROCESSING:
switch (caps->ac_subtype)
{
case AUDIO_PU_UNDEF:
/* Provide the type of Processing Units we support */
caps->ac_controls.b[0] = AUDIO_PU_STEREO_EXTENDER;
break;
case AUDIO_PU_STEREO_EXTENDER:
/* Provide capabilities of our Stereo Extender */
caps->ac_controls.b[0] =
AUDIO_STEXT_ENABLE | AUDIO_STEXT_WIDTH;
break;
default:
/* Other types of processing uint we don't support */
break;
}
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: cs43l22_configure
*
* Description:
* Configure the audio device for the specified mode of operation.
*
****************************************************************************/
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int
cs43l22_configure(FAR struct audio_lowerhalf_s *dev,
FAR void *session, FAR const struct audio_caps_s *caps)
#else
static int
cs43l22_configure(FAR struct audio_lowerhalf_s *dev,
FAR const struct audio_caps_s *caps)
#endif
{
FAR struct cs43l22_dev_s *priv = (FAR struct cs43l22_dev_s *)dev;
int ret = OK;
DEBUGASSERT(priv != NULL && caps != NULL);
audinfo("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)
{
/* Scale the volume setting to the range {76..255} */
cs43l22_setvolume(priv, (179 * volume / 1000) + 76,
priv->mute);
}
else
{
ret = -EDOM;
}
}
break;
#endif /* CONFIG_AUDIO_EXCLUDE_VOLUME */
#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)
{
/* Scale the volume setting to the range {76..255} */
cs43l22_setvolume(priv, (179 * priv->volume / 1000) + 76,
priv->mute);
}
else
{
ret = -EDOM;
}
}
break;
#endif /* CONFIG_AUDIO_EXCLUDE_VOLUME */
#ifndef CONFIG_AUDIO_EXCLUDE_TONE
case AUDIO_FU_BASS:
{
/* Set the bass. The percentage level (0-100) is in the
* ac_controls.b[0] parameter.
*/
uint8_t bass = caps->ac_controls.b[0];
audinfo(" Bass: %d\n", bass);
if (bass <= 100)
{
cs43l22_setbass(priv, bass);
}
else
{
ret = -EDOM;
}
}
break;
case AUDIO_FU_TREBLE:
{
/* Set the treble. The percentage level (0-100) is in the
* ac_controls.b[0] parameter.
*/
uint8_t treble = caps->ac_controls.b[0];
audinfo(" Treble: %d\n", treble);
if (treble <= 100)
{
cs43l22_settreble(priv, treble);
}
else
{
ret = -EDOM;
}
}
break;
#endif /* CONFIG_AUDIO_EXCLUDE_TONE */
default:
auderr(" ERROR: 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("ERROR: Unsupported number of channels: %d\n",
caps->ac_channels);
break;
}
if (caps->ac_controls.b[2] != 8 && caps->ac_controls.b[2] != 16)
{
auderr("ERROR: 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];
/* Reconfigure the FLL to support the resulting number or channels,
* bits per sample, and bitrate.
*/
cs43l22_setdatawidth(priv);
cs43l22_setbitrate(priv);
cs43l22_clock_analysis(&priv->dev, "AUDIO_TYPE_OUTPUT");
ret = OK;
}
break;
case AUDIO_TYPE_PROCESSING:
break;
}
return ret;
}
/****************************************************************************
* Name: cs43l22_shutdown
*
* Description:
* Shutdown the CS43L22 chip and put it in the lowest power state possible.
*
****************************************************************************/
static int cs43l22_shutdown(FAR struct audio_lowerhalf_s *dev)
{
FAR struct cs43l22_dev_s *priv = (FAR struct cs43l22_dev_s *)dev;
DEBUGASSERT(priv);
/* First disable interrupts */
CS43L22_DISABLE(priv->lower);
/* Now issue a software reset. This puts all CS43L22 registers back in
* their default state.
*/
cs43l22_reset(priv);
return OK;
}
/****************************************************************************
* Name: cs43l22_senddone
*
* Description:
* This is the I2S callback function that is invoked when the transfer
* completes.
*
****************************************************************************/
static void
cs43l22_senddone(FAR struct i2s_dev_s *i2s,
FAR struct ap_buffer_s *apb, FAR void *arg, int result)
{
FAR struct cs43l22_dev_s *priv = (FAR struct cs43l22_dev_s *)arg;
struct audio_msg_s msg;
irqstate_t flags;
int ret;
DEBUGASSERT(i2s && priv && priv->running && apb);
audinfo("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 */
/* REVISIT: This can be overwritten */
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_CS43L22_MSG_PRIO);
if (ret < 0)
{
auderr("ERROR: file_mq_send failed: %d\n", ret);
}
}
/****************************************************************************
* Name: cs43l22_returnbuffers
*
* Description:
* This function is called after the complete of one or more data
* transfers. This function will empty the done queue and release our
* reference to each buffer.
*
****************************************************************************/
static void cs43l22_returnbuffers(FAR struct cs43l22_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: cs43l22_sendbuffer
*
* Description:
* Start the transfer an audio buffer to the CS43L22 via I2S. This
* will not wait for the transfer to complete but will return immediately.
* the wmd8904_senddone called will be invoked when the transfer
* completes, stimulating the worker thread to call this function again.
*
****************************************************************************/
static int cs43l22_sendbuffer(FAR struct cs43l22_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_CS43L22_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 semaphore. Let's
* hold the semaphore 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_CS43L22_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("Sending 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 samples
* 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), bpsamp is either
* (1 << 3) or (1 << 4), and nchannels is either (1 << 0) or
* (1 << 1). So this can be simplifies to (milliseconds):
*
* = (buffer_size << shift) / samplerate
*/
shift = (priv->bpsamp == 8) ? 14 - 3 : 14 - 4;
shift -= (priv->nchannels > 1) ? 1 : 0;
timeout = MSEC2TICK(((uint32_t)(apb->nbytes - apb->curbyte) << shift) /
(uint32_t)priv->samprate);
ret = I2S_SEND(priv->i2s, apb, cs43l22_senddone, priv, timeout);
if (ret < 0)
{
auderr("ERROR: I2S_SEND failed: %d\n", ret);
break;
}
}
nxmutex_unlock(&priv->pendlock);
return ret;
}
/****************************************************************************
* Name: cs43l22_start
*
* Description:
* Start the configured operation (audio streaming, volume enabled, etc.).
*
****************************************************************************/
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int cs43l22_start(FAR struct audio_lowerhalf_s *dev,
FAR void *session)
#else
static int cs43l22_start(FAR struct audio_lowerhalf_s *dev)
#endif
{
FAR struct cs43l22_dev_s *priv = (FAR struct cs43l22_dev_s *)dev;
struct sched_param sparam;
struct mq_attr attr;
pthread_attr_t tattr;
FAR void *value;
int ret;
audinfo("Entry\n");
/* Exit reduced power modes of operation */
/* REVISIT */
/* Create a message queue for the worker thread */
snprintf(priv->mqname, sizeof(priv->mqname), "/tmp/%" 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("ERROR: 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 sending data to the device */
pthread_attr_init(&tattr);
sparam.sched_priority = sched_get_priority_max(SCHED_FIFO) - 3;
pthread_attr_setschedparam(&tattr, &sparam);
pthread_attr_setstacksize(&tattr, CONFIG_CS43L22_WORKER_STACKSIZE);
audinfo("Starting worker thread\n");
ret = pthread_create(&priv->threadid, &tattr, cs43l22_workerthread,
(pthread_addr_t)priv);
if (ret != OK)
{
auderr("ERROR: pthread_create failed: %d\n", ret);
}
else
{
pthread_setname_np(priv->threadid, "cs43l22");
audinfo("Created worker thread\n");
}
return ret;
}
/****************************************************************************
* Name: cs43l22_stop
*
* Description:
* Stop the configured operation (audio streaming, volume disabled, etc.).
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
# ifdef CONFIG_AUDIO_MULTI_SESSION
static int cs43l22_stop(FAR struct audio_lowerhalf_s *dev, FAR void *session)
# else
static int cs43l22_stop(FAR struct audio_lowerhalf_s *dev)
# endif
{
FAR struct cs43l22_dev_s *priv = (FAR struct cs43l22_dev_s *)dev;
struct audio_msg_s term_msg;
FAR void *value;
/* 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_CS43L22_MSG_PRIO);
/* Join the worker thread */
pthread_join(priv->threadid, &value);
priv->threadid = 0;
/* Enter into a reduced power usage mode */
/* REVISIT: */
return OK;
}
#endif
/****************************************************************************
* Name: cs43l22_pause
*
* Description:
* Pauses the playback.
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
# ifdef CONFIG_AUDIO_MULTI_SESSION
static int cs43l22_pause(FAR struct audio_lowerhalf_s *dev,
FAR void *session)
# else
static int cs43l22_pause(FAR struct audio_lowerhalf_s *dev)
# endif
{
FAR struct cs43l22_dev_s *priv = (FAR struct cs43l22_dev_s *)dev;
if (priv->running && !priv->paused)
{
/* Disable interrupts to prevent us from suppling any more data */
priv->paused = true;
cs43l22_setvolume(priv, priv->volume, true);
CS43L22_DISABLE(priv->lower);
}
return OK;
}
#endif /* CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME */
/****************************************************************************
* Name: cs43l22_resume
*
* Description:
* Resumes the playback.
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
# ifdef CONFIG_AUDIO_MULTI_SESSION
static int cs43l22_resume(FAR struct audio_lowerhalf_s *dev,
FAR void *session)
# else
static int cs43l22_resume(FAR struct audio_lowerhalf_s *dev)
# endif
{
FAR struct cs43l22_dev_s *priv = (FAR struct cs43l22_dev_s *)dev;
if (priv->running && priv->paused)
{
priv->paused = false;
cs43l22_setvolume(priv, priv->volume, false);
/* Enable interrupts to allow sampling data */
cs43l22_sendbuffer(priv);
#ifdef CS43L22_USE_FFLOCK_INT
CS43L22_ENABLE(priv->lower);
#endif
}
return OK;
}
#endif /* CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME */
/****************************************************************************
* Name: cs43l22_enqueuebuffer
*
* Description:
* Enqueue an Audio Pipeline Buffer for playback/ processing.
*
****************************************************************************/
static int cs43l22_enqueuebuffer(FAR struct audio_lowerhalf_s *dev,
FAR struct ap_buffer_s *apb)
{
FAR struct cs43l22_dev_s *priv = (FAR struct cs43l22_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 */
apb->flags |= AUDIO_APB_OUTPUT_ENQUEUED;
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_CS43L22_MSG_PRIO);
if (ret < 0)
{
auderr("ERROR: file_mq_send failed: %d\n", ret);
}
}
return ret;
}
/****************************************************************************
* Name: cs43l22_cancelbuffer
*
* Description:
* Called when an enqueued buffer is being cancelled.
*
****************************************************************************/
static int cs43l22_cancelbuffer(FAR struct audio_lowerhalf_s *dev,
FAR struct ap_buffer_s *apb)
{
audinfo("apb=%p\n", apb);
return OK;
}
/****************************************************************************
* Name: cs43l22_ioctl
*
* Description:
* Perform a device ioctl
*
****************************************************************************/
static int cs43l22_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)
{
/* Check for AUDIOIOC_HWRESET ioctl. This ioctl is passed straight
* through from the upper-half audio driver.
*/
case AUDIOIOC_HWRESET:
{
/* REVISIT: Should we completely re-initialize the chip? We
* can't just issue a software reset; that would puts all WM8904
* registers back in their default state.
*/
audinfo("AUDIOIOC_HWRESET:\n");
}
break;
/* 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_CS43L22_BUFFER_SIZE;
bufinfo->nbuffers = CONFIG_CS43L22_NUM_BUFFERS;
}
break;
#endif
default:
ret = -ENOTTY;
audinfo("Ignored\n");
break;
}
return ret;
}
/****************************************************************************
* Name: cs43l22_reserve
*
* Description:
* Reserves a session (the only one we have).
*
****************************************************************************/
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int
cs43l22_reserve(FAR struct audio_lowerhalf_s *dev, FAR void **session)
#else
static int cs43l22_reserve(FAR struct audio_lowerhalf_s *dev)
#endif
{
FAR struct cs43l22_dev_s *priv = (FAR struct cs43l22_dev_s *)dev;
int ret = OK;
/* Borrow the APBQ mutex 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: cs43l22_release
*
* Description:
* Releases the session (the only one we have).
*
****************************************************************************/
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int cs43l22_release(FAR struct audio_lowerhalf_s *dev,
FAR void *session)
#else
static int cs43l22_release(FAR struct audio_lowerhalf_s *dev)
#endif
{
FAR struct cs43l22_dev_s *priv = (FAR struct cs43l22_dev_s *)dev;
FAR void *value;
int ret;
/* 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 mutex 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: cs43l22_interrupt_work
*
* Description:
* CS43L22 interrupt actions cannot be performed in the interrupt handler
* because I2C access is not possible in that context. Instead, all I2C
* operations are deferred to the work queue.
*
* Assumptions:
* CS43L22 interrupts were disabled in the interrupt handler.
*
****************************************************************************/
#ifdef CS43L22_USE_FFLOCK_INT
static void cs43l22_interrupt_work(FAR void *arg)
{
/* TODO */
#warning Missing logic
}
#endif
/****************************************************************************
* Name: cs43l22_interrupt
*
* Description:
* This is the ISR that services the GPIO1/IRQ pin from the CS43L22. It
* signals CS43L22 events such FLL lock.
*
****************************************************************************/
#ifdef CS43L22_USE_FFLOCK_INT
static int
cs43l22_interrupt(FAR const struct cs43l22_lower_s *lower, FAR void *arg)
{
/* TODO */
#warning Missing logic
}
#endif
/****************************************************************************
* Name: cs43l22_workerthread
*
* This is the thread that feeds data to the chip and keeps the audio
* stream going.
*
****************************************************************************/
static void *cs43l22_workerthread(pthread_addr_t pvarg)
{
FAR struct cs43l22_dev_s *priv = (struct cs43l22_dev_s *)pvarg;
struct audio_msg_s msg;
FAR struct ap_buffer_s *apb;
int msglen;
unsigned int prio;
audinfo("Entry\n");
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
priv->terminating = false;
#endif
/* Mark ourself as running and make sure that CS43L22 interrupts are
* enabled.
*/
priv->running = true;
#ifdef CS43L22_USE_FFLOCK_INT
CS43L22_ENABLE(priv->lower);
#endif
cs43l22_setvolume(priv, priv->volume, false);
/* 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 send more audio buffers to the CS43L22 */
cs43l22_sendbuffer(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("ERROR: 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 send. 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");
cs43l22_returnbuffers(priv);
break;
default:
auderr("ERROR: Ignoring message ID %d\n", msg.msg_id);
break;
}
}
/* Reset the CS43L22 hardware */
cs43l22_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 */
cs43l22_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("Exit\n");
return NULL;
}
/****************************************************************************
* Name: cs43l22_audio_output
*
* Description:
* Initialize and configure the CS43L22 device as an audio output device.
*
* Input Parameters:
* priv - A reference to the driver state structure
*
* Returned Value:
* None. No failures are detected.
*
****************************************************************************/
static void cs43l22_audio_output(FAR struct cs43l22_dev_s *priv)
{
uint8_t regval;
/* Keep codec powered off */
regval = CS43L22_POWER_DOWN;
cs43l22_writereg(priv, CS43L22_POWER_CTRL1, regval);
/* SPK always off and HP always on */
regval = CS43L22_PDN_HPB_ON | CS43L22_PDN_HPA_ON | CS43L22_PDN_SPKB_OFF |
CS43L22_PDN_SPKA_OFF;
cs43l22_writereg(priv, CS43L22_POWER_CTRL2, regval);
/* Clock configuration: Auto detection */
regval = CS43L22_AUTO_DETECT_ENABLE | CS43L22_CLKDIV2_ENABLE;
cs43l22_writereg(priv, CS43L22_CLOCK_CTRL, regval);
/* Set slave mode and Philips audio standard */
regval = CS43L22_DAC_IF_I2S;
cs43l22_writereg(priv, CS43L22_INTERFACE_CTRL1, regval);
/* Power on the codec */
regval = CS43L22_POWER_UP;
cs43l22_writereg(priv, CS43L22_POWER_CTRL1, regval);
/* Disable the analog soft ramp */
regval = 0x00;
cs43l22_writereg(priv, CS43L22_ANLG_ZC_SR_SEL, regval);
/* Disable the digital soft ramp */
regval = CS43L22_DEEMPHASIS_ENABLE;
cs43l22_writereg(priv, CS43L22_MISCLLNS_CTRL, regval);
/* Disable the limiter attack level */
regval = 0x00;
cs43l22_writereg(priv, CS43L22_LIM_CTRL1, regval);
/* Adjust bass and treble levels */
regval = CS43L22_BASS_GAIN(0x0f);
cs43l22_writereg(priv, CS43L22_TONE_CTRL, regval);
/* Adjust PCM volume level */
regval = 0x0a;
cs43l22_writereg(priv, CS43L22_PCM_VOL_A, regval);
cs43l22_writereg(priv, CS43L22_PCM_VOL_B, regval);
cs43l22_setdatawidth(priv);
cs43l22_setvolume(priv, CONFIG_CS43L22_INITVOLUME, false);
}
/****************************************************************************
* Name: cs43l22_audio_input
*
* Description:
* Initialize and configure the CS43L22 device as an audio output device
* (Right input only). cs43l22_audio_output() must be called first, this
* function then modifies the configuration to support audio input.
*
* Input Parameters:
* priv - A reference to the driver state structure
*
* Returned Value:
* None. No failures are detected.
*
****************************************************************************/
#if 0 /* Not used */
static void cs43l22_audio_input(FAR struct cs43l22_dev_s *priv)
{
/* TODO */
#warning Missing logic
}
#endif
/****************************************************************************
* Name: cs43l22_configure_ints
*
* Description:
* Configure the GPIO/IRQ interrupt
*
* Input Parameters:
* priv - A reference to the driver state structure
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CS43L22_USE_FFLOCK_INT
static void cs43l22_configure_ints(FAR struct cs43l22_dev_s *priv)
{
/* TODO */
#warning Missing logic
}
#endif
/****************************************************************************
* Name: cs43l22_reset
*
* Description:
* Reset and re-initialize the CS43L22
*
* Input Parameters:
* priv - A reference to the driver state structure
*
* Returned Value:
* None
*
****************************************************************************/
static void cs43l22_reset(FAR struct cs43l22_dev_s *priv)
{
/* Put audio output back to its initial configuration */
/* Put audio output back to its initial configuration */
priv->samprate = CS43L22_DEFAULT_SAMPRATE;
priv->nchannels = CS43L22_DEFAULT_NCHANNELS;
priv->bpsamp = CS43L22_DEFAULT_BPSAMP;
#if !defined(CONFIG_AUDIO_EXCLUDE_VOLUME) && !defined(CONFIG_AUDIO_EXCLUDE_BALANCE)
priv->balance = 500; /* b16HALF = Center balance */
#endif
/* Software reset. This puts all CS43L22 registers back in their
* default state.
*/
/* cs43l22_writereg(priv, CS43L22_SWRST, 0); */
/* Configure the CS43L22 hardware as an audio input device */
cs43l22_audio_output(priv);
/* Configure interrupts */
/* cs43l22_configure_ints(priv); */
/* Configure the FLL and the LRCLK */
cs43l22_setbitrate(priv);
/* Dump some information and return the device instance */
cs43l22_dump_registers(&priv->dev, "After configuration");
cs43l22_clock_analysis(&priv->dev, "After configuration");
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: cs43l22_initialize
*
* Description:
* Initialize the CS43L22 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 CS43L22 device is returned on
* success; NULL is returned on failure.
*
****************************************************************************/
FAR struct audio_lowerhalf_s *
cs43l22_initialize(FAR struct i2c_master_s *i2c, FAR struct i2s_dev_s *i2s,
FAR const struct cs43l22_lower_s *lower)
{
FAR struct cs43l22_dev_s *priv;
uint16_t regval;
/* Sanity check */
DEBUGASSERT(i2c && i2s && lower);
/* Allocate a CS43L22 device structure */
priv = (FAR struct cs43l22_dev_s *)
kmm_zalloc(sizeof(struct cs43l22_dev_s));
if (priv)
{
/* Initialize the CS43L22 device structure. Since we used kmm_zalloc,
* only the non-zero elements of the structure need to be initialized.
*/
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);
/* Initialize I2C */
audinfo("address=%02x frequency=%" PRId32 "\n",
lower->address, lower->frequency);
/* Software reset. This puts all CS43L22 registers back in their
* default state.
*/
CS43L22_HW_RESET(priv->lower);
cs43l22_dump_registers(&priv->dev, "After reset");
/* Verify that CS43L22 is present and available on this I2C */
regval = cs43l22_readreg(priv, CS43L22_ID_REV);
if ((regval & 0xff) != CS43L22_DEV_ID_REV)
{
auderr("ERROR: CS43L22 not found: ID=%02x\n", regval);
goto errout_with_dev;
}
/* Reset and reconfigure the CS43L22 hardware */
cs43l22_reset(priv);
return &priv->dev;
}
return NULL;
errout_with_dev:
nxmutex_destroy(&priv->pendlock);
kmm_free(priv);
return NULL;
}