static void
snd_bebob_update(struct fw_unit *unit)
{
struct snd_bebob *bebob = dev_get_drvdata(&unit->device);
/* this is for firmware bootloader */
if (bebob == NULL)
goto end;
fcp_bus_reset(bebob->unit);
/* bus reset for isochronous transmit stream */
if (cmp_connection_update(&bebob->in_conn) < 0) {
amdtp_stream_pcm_abort(&bebob->tx_stream);
mutex_lock(&bebob->mutex);
snd_bebob_stream_stop(bebob, &bebob->tx_stream);
mutex_unlock(&bebob->mutex);
}
amdtp_stream_update(&bebob->tx_stream);
/* bus reset for isochronous receive stream */
if (cmp_connection_update(&bebob->out_conn) < 0) {
amdtp_stream_pcm_abort(&bebob->rx_stream);
mutex_lock(&bebob->mutex);
snd_bebob_stream_stop(bebob, &bebob->rx_stream);
mutex_unlock(&bebob->mutex);
}
amdtp_stream_update(&bebob->rx_stream);
end:
return;
}
/*
* This driver doesn't update streams in bus reset handler.
*
* DM1000/ DM1100/DM1500 chipsets with BeBoB firmware transfer packets with
* discontinued counter at bus reset. This discontinuity is immediately
* detected in packet streaming layer, then it sets XRUN to PCM substream.
*
* ALSA PCM applications can know the XRUN by getting -EPIPE from PCM operation.
* Then, they can recover the PCM substream by executing ioctl(2) with
* SNDRV_PCM_IOCTL_PREPARE. 'struct snd_pcm_ops.prepare' is called and drivers
* restart packet streaming.
*
* The above processing may be executed before this bus-reset handler is
* executed. When this handler updates streams with current isochronous
* channels, the streams already have the current ones.
*/
static void
bebob_update(struct fw_unit *unit)
{
struct snd_bebob *bebob = dev_get_drvdata(&unit->device);
if (bebob == NULL)
return;
/* Postpone a workqueue for deferred registration. */
if (!bebob->registered)
snd_fw_schedule_registration(unit, &bebob->dwork);
else
fcp_bus_reset(bebob->unit);
}
static void oxfw_bus_reset(struct fw_unit *unit)
{
struct snd_oxfw *oxfw = dev_get_drvdata(&unit->device);
fcp_bus_reset(oxfw->unit);
mutex_lock(&oxfw->mutex);
snd_oxfw_stream_update_simplex(oxfw, &oxfw->rx_stream);
if (oxfw->has_output)
snd_oxfw_stream_update_simplex(oxfw, &oxfw->tx_stream);
mutex_unlock(&oxfw->mutex);
}
/*
* This driver doesn't update streams in bus reset handler.
*
* DM1000/ DM1100/DM1500 chipsets with BeBoB firmware transfer packets with
* discontinued counter at bus reset. This discontinuity is immediately
* detected in packet streaming layer, then it sets XRUN to PCM substream.
*
* ALSA PCM applications can know the XRUN by getting -EPIPE from PCM operation.
* Then, they can recover the PCM substream by executing ioctl(2) with
* SNDRV_PCM_IOCTL_PREPARE. 'struct snd_pcm_ops.prepare' is called and drivers
* restart packet streaming.
*
* The above processing may be executed before this bus-reset handler is
* executed. When this handler updates streams with current isochronous
* channels, the streams already have the current ones.
*/
static void
bebob_update(struct fw_unit *unit)
{
struct snd_bebob *bebob = dev_get_drvdata(&unit->device);
if (bebob == NULL)
return;
fcp_bus_reset(bebob->unit);
if (bebob->deferred_registration) {
if (snd_card_register(bebob->card) < 0) {
snd_bebob_stream_destroy_duplex(bebob);
snd_card_free(bebob->card);
}
bebob->deferred_registration = false;
}
}
static void oxfw_bus_reset(struct fw_unit *unit)
{
struct snd_oxfw *oxfw = dev_get_drvdata(&unit->device);
if (!oxfw->registered)
snd_fw_schedule_registration(unit, &oxfw->dwork);
fcp_bus_reset(oxfw->unit);
if (oxfw->registered) {
mutex_lock(&oxfw->mutex);
snd_oxfw_stream_update_simplex(oxfw, &oxfw->rx_stream);
if (oxfw->has_output)
snd_oxfw_stream_update_simplex(oxfw, &oxfw->tx_stream);
mutex_unlock(&oxfw->mutex);
if (oxfw->entry->vendor_id == OUI_STANTON)
snd_oxfw_scs1x_update(oxfw);
}
}
