static int audio_close(FAR struct file *filep)
{
FAR struct inode *inode = filep->f_inode;
FAR struct audio_upperhalf_s *upper = inode->i_private;
int ret;
audvdbg("crefs: %d\n", upper->crefs);
/* Get exclusive access to the device structures */
ret = sem_wait(&upper->exclsem);
if (ret < 0)
{
ret = -errno;
goto errout;
}
/* Decrement the references to the driver. If the reference count will
* decrement to 0, then uninitialize the driver.
*/
if (upper->crefs > 1)
{
upper->crefs--;
}
else
{
FAR struct audio_lowerhalf_s *lower = upper->dev;
/* There are no more references to the port */
upper->crefs = 0;
/* Disable the Audio device */
DEBUGASSERT(lower->ops->shutdown != NULL);
audvdbg("calling shutdown: %d\n");
lower->ops->shutdown(lower);
}
ret = OK;
//errout_with_sem:
sem_post(&upper->exclsem);
errout:
return ret;
}
alc_i2c_t *alc5658_i2c_initialize(void)
{
alc_i2c_t *i2c;
int i;
int ret;
i2c_dev = up_i2cinitialize(CONFIG_ALC5658_I2C_PORT);
if (i2c_dev == NULL) {
i2cerr("ALC5658 up_i2cinitialize(port: %d) failed\n", CONFIG_ALC5658_I2C_PORT);
return NULL;
}
configs.frequency = CONFIG_ALC5658_I2C_FREQ;
configs.address = ALC5658_ADDR;
configs.addrlen = CONFIG_ALC5658_I2C_ADDRLEN;
i2c = &alc5658_i2c;
for (i = 0; i < sizeof(codec_init_script) / sizeof(t_codec_init_script_entry); i++) {
ret = i2c->modify(codec_init_script[i].addr, codec_init_script[i].val, 0xFFFF);
audvdbg("ALC %x <- %x\n", codec_init_script[i].addr, ret);
delay(codec_init_script[i].delay);
}
return i2c;
}
void apb_free(FAR struct ap_buffer_s *apb)
{
int refcount;
/* Perform a reference count decrement and possibly release the memory */
apb_semtake(apb);
refcount = apb->crefs--;
apb_semgive(apb);
if (refcount <= 1)
{
audvdbg("Freeing %p\n", apb);
lib_ufree(apb);
}
}
static int audio_open(FAR struct file *filep)
{
FAR struct inode *inode = filep->f_inode;
FAR struct audio_upperhalf_s *upper = inode->i_private;
uint8_t tmp;
int ret;
audvdbg("crefs: %d\n", upper->crefs);
/* Get exclusive access to the device structures */
ret = sem_wait(&upper->exclsem);
if (ret < 0)
{
ret = -errno;
goto errout;
}
/* Increment the count of references to the device. If this the first
* time that the driver has been opened for this device, then initialize
* the device.
*/
tmp = upper->crefs + 1;
if (tmp == 0)
{
/* More than 255 opens; uint8_t overflows to zero */
ret = -EMFILE;
goto errout_with_sem;
}
/* Save the new open count on success */
upper->crefs = tmp;
upper->usermq = NULL;
ret = OK;
errout_with_sem:
sem_post(&upper->exclsem);
errout:
return ret;
}
int audio_register(FAR const char *name, FAR struct audio_lowerhalf_s *dev)
{
FAR struct audio_upperhalf_s *upper;
char path[AUDIO_MAX_DEVICE_PATH];
static bool dev_audio_created = false;
#ifndef CONFIG_AUDIO_CUSTOM_DEV_PATH
const char* devname = "/dev/audio";
#elif !defined(CONFIG_AUDIO_DEV_ROOT)
const char* devname = CONFIG_AUDIO_DEV_PATH;
const char* ptr;
char* pathptr;
#endif
/* Allocate the upper-half data structure */
upper = (FAR struct audio_upperhalf_s *)kzalloc(sizeof(struct audio_upperhalf_s));
if (!upper)
{
auddbg("Allocation failed\n");
return -ENOMEM;
}
/* Initialize the Audio device structure (it was already zeroed by kzalloc()) */
sem_init(&upper->exclsem, 0, 1);
upper->dev = dev;
#ifdef CONFIG_AUDIO_CUSTOM_DEV_PATH
#ifdef CONFIG_AUDIO_DEV_ROOT
/* This is the simple case ... No need to make a directory */
strcpy(path, "/dev/");
strcat(path, name);
#else
/* Ensure the path begins with "/dev" as we don't support placing device
* anywhere but in the /dev directory
*/
DEBUGASSERT(strncmp(devname, "/dev", 4) == 0);
/* Create a /dev/audio directory. */
if (!dev_audio_created)
{
/* Get path name after "/dev" */
ptr = &devname[4];
if (*ptr == '/')
{
ptr++;
}
strcpy(path, "/dev/");
pathptr = &path[5];
/* Do mkdir for each segment of the path */
while (*ptr != '\0')
{
/* Build next path segment into path variable */
while (*ptr != '/' && *ptr != '\0')
{
*pathptr++ = *ptr++;
}
*pathptr = '\0';
/* Make this level of directory */
mkdir(path, 0644);
/* Check for another level */
*pathptr++ = '/';
if (*ptr == '/')
{
ptr++;
}
}
/* Indicate we have created the audio dev path */
dev_audio_created = true;
}
/* Now build the path for registration */
strcpy(path, devname);
if (devname[sizeof(devname)-1] != '/')
{
strcat(path, "/");
}
strcat(path, name);
#endif /* CONFIG_AUDIO_DEV_PATH=="/dev" */
#else /* CONFIG_AUDIO_CUSTOM_DEV_PATH */
/* Create a /dev/audio directory. */
if (!dev_audio_created)
{
/* We don't check for error here because even if it fails, then
* the register_driver call below will return an error condition
* for us.
*/
mkdir(devname, 0644);
dev_audio_created = true;
}
/* Register the Audio device */
memset(path, 0, AUDIO_MAX_DEVICE_PATH);
strcpy(path, devname);
strcat(path, "/");
strncat(path, name, AUDIO_MAX_DEVICE_PATH - 11);
#endif
audvdbg("Registering %s\n", path);
return register_driver(path, &g_audioops, 0666, upper);
}
static int audio_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
{
FAR struct inode *inode = filep->f_inode;
FAR struct audio_upperhalf_s *upper = inode->i_private;
FAR struct audio_lowerhalf_s *lower = upper->dev;
int ret;
audvdbg("cmd: %d arg: %ld\n", cmd, arg);
/* Get exclusive access to the device structures */
ret = sem_wait(&upper->exclsem);
if (ret < 0)
{
return ret;
}
/* Handle built-in ioctl commands */
switch (cmd)
{
/* AUDIOIOC_GETCAPS - Get the audio device capabilities.
*
* ioctl argument: A pointer to the audio_caps_s structure.
*/
case AUDIOIOC_GETCAPS:
{
FAR struct audio_caps_s *caps = (FAR struct audio_caps_s*)((uintptr_t)arg);
DEBUGASSERT(lower->ops->getcaps != NULL);
audvdbg("AUDIOIOC_GETCAPS: Device=%d", caps->ac_type);
/* Call the lower-half driver capabilities handler */
ret = lower->ops->getcaps(lower, caps->ac_type, caps);
}
break;
case AUDIOIOC_CONFIGURE:
{
FAR const struct audio_caps_s *caps = (FAR const struct audio_caps_s*)((uintptr_t)arg);
DEBUGASSERT(lower->ops->configure != NULL);
audvdbg("AUDIOIOC_INITIALIZE: Device=%d", caps->ac_type);
/* Call the lower-half driver configure handler */
ret = lower->ops->configure(lower, caps, &audio_callback, upper);
}
break;
case AUDIOIOC_SHUTDOWN:
{
DEBUGASSERT(lower->ops->shutdown != NULL);
audvdbg("AUDIOIOC_SHUTDOWN\n");
/* Call the lower-half driver initialize handler */
ret = lower->ops->shutdown(lower);
}
break;
/* AUDIOIOC_START - Start the pulsed output. The AUDIOIOC_SETCHARACTERISTICS
* command must have previously been sent.
*
* ioctl argument: None
*/
case AUDIOIOC_START:
{
audvdbg("AUDIOIOC_START\n");
DEBUGASSERT(lower->ops->start != NULL);
/* Start the pulse train */
ret = audio_start(upper, filep->f_oflags);
}
break;
/* AUDIOIOC_STOP - Stop the pulsed output.
*
* ioctl argument: None
*/
case AUDIOIOC_STOP:
{
audvdbg("AUDIOIOC_STOP\n");
DEBUGASSERT(lower->ops->stop != NULL);
if (upper->started)
{
ret = lower->ops->stop(lower);
upper->started = false;
}
}
break;
/* Any unrecognized IOCTL commands might be platform-specific ioctl commands */
default:
{
audvdbg("Forwarding unrecognized cmd: %d arg: %ld\n", cmd, arg);
DEBUGASSERT(lower->ops->ioctl != NULL);
ret = lower->ops->ioctl(lower, cmd, arg);
}
break;
}
sem_post(&upper->exclsem);
return ret;
}
static int audio_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
{
FAR struct inode *inode = filep->f_inode;
FAR struct audio_upperhalf_s *upper = inode->i_private;
FAR struct audio_lowerhalf_s *lower = upper->dev;
FAR struct audio_buf_desc_s *bufdesc;
#ifdef CONFIG_AUDIO_MULTI_SESSION
FAR void *session;
#endif
int ret;
audvdbg("cmd: %d arg: %ld\n", cmd, arg);
/* Get exclusive access to the device structures */
ret = sem_wait(&upper->exclsem);
if (ret < 0)
{
return ret;
}
/* Handle built-in ioctl commands */
switch (cmd)
{
/* AUDIOIOC_GETCAPS - Get the audio device capabilities.
*
* ioctl argument: A pointer to the audio_caps_s structure.
*/
case AUDIOIOC_GETCAPS:
{
FAR struct audio_caps_s *caps = (FAR struct audio_caps_s*)((uintptr_t)arg);
DEBUGASSERT(lower->ops->getcaps != NULL);
audvdbg("AUDIOIOC_GETCAPS: Device=%d\n", caps->ac_type);
/* Call the lower-half driver capabilities handler */
ret = lower->ops->getcaps(lower, caps->ac_type, caps);
}
break;
case AUDIOIOC_CONFIGURE:
{
FAR const struct audio_caps_desc_s *caps =
(FAR const struct audio_caps_desc_s*)((uintptr_t)arg);
DEBUGASSERT(lower->ops->configure != NULL);
audvdbg("AUDIOIOC_INITIALIZE: Device=%d\n", caps->caps.ac_type);
/* Call the lower-half driver configure handler */
#ifdef CONFIG_AUDIO_MULTI_SESSION
ret = lower->ops->configure(lower, caps->session, &caps->caps);
#else
ret = lower->ops->configure(lower, &caps->caps);
#endif
}
break;
case AUDIOIOC_SHUTDOWN:
{
DEBUGASSERT(lower->ops->shutdown != NULL);
audvdbg("AUDIOIOC_SHUTDOWN\n");
/* Call the lower-half driver initialize handler */
ret = lower->ops->shutdown(lower);
}
break;
/* AUDIOIOC_START - Start the audio stream. The AUDIOIOC_SETCHARACTERISTICS
* command must have previously been sent.
*
* ioctl argument: Audio session
*/
case AUDIOIOC_START:
{
audvdbg("AUDIOIOC_START\n");
DEBUGASSERT(lower->ops->start != NULL);
/* Start the audio stream */
#ifdef CONFIG_AUDIO_MULTI_SESSION
session = (FAR void *) arg;
ret = audio_start(upper, session);
#else
ret = audio_start(upper);
#endif
}
break;
/* AUDIOIOC_STOP - Stop the audio stream.
*
* ioctl argument: Audio session
*/
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
case AUDIOIOC_STOP:
{
audvdbg("AUDIOIOC_STOP\n");
DEBUGASSERT(lower->ops->stop != NULL);
if (upper->started)
{
#ifdef CONFIG_AUDIO_MULTI_SESSION
session = (FAR void *) arg;
ret = lower->ops->stop(lower, session);
#else
ret = lower->ops->stop(lower);
#endif
upper->started = false;
}
}
break;
#endif /* CONFIG_AUDIO_EXCLUDE_STOP */
/* AUDIOIOC_PAUSE - Pause the audio stream.
*
* ioctl argument: Audio session
*/
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
case AUDIOIOC_PAUSE:
{
audvdbg("AUDIOIOC_PAUSE\n");
DEBUGASSERT(lower->ops->pause != NULL);
if (upper->started)
{
#ifdef CONFIG_AUDIO_MULTI_SESSION
session = (FAR void *) arg;
ret = lower->ops->pause(lower, session);
#else
ret = lower->ops->pause(lower);
#endif
}
}
break;
/* AUDIOIOC_RESUME - Resume the audio stream.
*
* ioctl argument: Audio session
*/
case AUDIOIOC_RESUME:
{
audvdbg("AUDIOIOC_RESUME\n");
DEBUGASSERT(lower->ops->resume != NULL);
if (upper->started)
{
#ifdef CONFIG_AUDIO_MULTI_SESSION
session = (FAR void *) arg;
ret = lower->ops->resume(lower, session);
#else
ret = lower->ops->resume(lower);
#endif
}
}
break;
#endif /* CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME */
/* AUDIOIOC_ALLOCBUFFER - Allocate an audio buffer
*
* ioctl argument: pointer to an audio_buf_desc_s structure
*/
case AUDIOIOC_ALLOCBUFFER:
{
audvdbg("AUDIOIOC_ALLOCBUFFER\n");
bufdesc = (FAR struct audio_buf_desc_s *) arg;
if (lower->ops->allocbuffer)
{
ret = lower->ops->allocbuffer(lower, bufdesc);
}
else
{
/* Perform a simple kumalloc operation assuming 1 session */
ret = apb_alloc(bufdesc);
}
}
break;
/* AUDIOIOC_FREEBUFFER - Free an audio buffer
*
* ioctl argument: pointer to an audio_buf_desc_s structure
*/
case AUDIOIOC_FREEBUFFER:
{
audvdbg("AUDIOIOC_FREEBUFFER\n");
bufdesc = (FAR struct audio_buf_desc_s *) arg;
if (lower->ops->freebuffer)
{
ret = lower->ops->freebuffer(lower, bufdesc);
}
else
{
/* Perform a simple kufree operation */
DEBUGASSERT(bufdesc->u.pBuffer != NULL);
apb_free(bufdesc->u.pBuffer);
ret = sizeof(struct audio_buf_desc_s);
}
}
break;
/* AUDIOIOC_ENQUEUEBUFFER - Enqueue an audio buffer
*
* ioctl argument: pointer to an audio_buf_desc_s structure
*/
case AUDIOIOC_ENQUEUEBUFFER:
{
audvdbg("AUDIOIOC_ENQUEUEBUFFER\n");
DEBUGASSERT(lower->ops->enqueuebuffer != NULL);
bufdesc = (FAR struct audio_buf_desc_s *) arg;
ret = lower->ops->enqueuebuffer(lower, bufdesc->u.pBuffer);
}
break;
/* AUDIOIOC_REGISTERMQ - Register a client Message Queue
*
* TODO: This needs to have multi session support.
*/
case AUDIOIOC_REGISTERMQ:
{
audvdbg("AUDIOIOC_REGISTERMQ\n");
upper->usermq = (mqd_t) arg;
ret = OK;
}
break;
/* AUDIOIOC_UNREGISTERMQ - Register a client Message Queue
*
* TODO: This needs to have multi session support.
*/
case AUDIOIOC_UNREGISTERMQ:
{
audvdbg("AUDIOIOC_UNREGISTERMQ\n");
upper->usermq = NULL;
ret = OK;
}
break;
/* AUDIOIOC_RESERVE - Reserve a session with the driver
*
* ioctl argument - pointer to receive the session context
*/
case AUDIOIOC_RESERVE:
{
audvdbg("AUDIOIOC_RESERVE\n");
DEBUGASSERT(lower->ops->reserve != NULL);
/* Call lower-half to perform the reservation */
#ifdef CONFIG_AUDIO_MULTI_SESSION
ret = lower->ops->reserve(lower, (FAR void **) arg);
#else
ret = lower->ops->reserve(lower);
#endif
}
break;
/* AUDIOIOC_RESERVE - Reserve a session with the driver
*
* ioctl argument - pointer to receive the session context
*/
case AUDIOIOC_RELEASE:
{
audvdbg("AUDIOIOC_RELEASE\n");
DEBUGASSERT(lower->ops->release != NULL);
/* Call lower-half to perform the release */
#ifdef CONFIG_AUDIO_MULTI_SESSION
ret = lower->ops->release(lower, (FAR void *) arg);
#else
ret = lower->ops->release(lower);
#endif
}
break;
/* Any unrecognized IOCTL commands might be platform-specific ioctl commands */
default:
{
audvdbg("Forwarding unrecognized cmd: %d arg: %ld\n", cmd, arg);
DEBUGASSERT(lower->ops->ioctl != NULL);
ret = lower->ops->ioctl(lower, cmd, arg);
}
break;
}
sem_post(&upper->exclsem);
return ret;
}