int snd_efw_stream_start_duplex(struct snd_efw *efw, unsigned int rate)
{
struct amdtp_stream *master, *slave;
atomic_t *slave_substreams;
enum cip_flags sync_mode;
unsigned int curr_rate;
int err = 0;
mutex_lock(&efw->mutex);
/* Need no substreams */
if ((atomic_read(&efw->playback_substreams) == 0) &&
(atomic_read(&efw->capture_substreams) == 0))
goto end;
err = get_sync_mode(efw, &sync_mode);
if (err < 0)
goto end;
if (sync_mode == CIP_SYNC_TO_DEVICE) {
master = &efw->tx_stream;
slave = &efw->rx_stream;
slave_substreams = &efw->playback_substreams;
} else {
master = &efw->rx_stream;
slave = &efw->tx_stream;
slave_substreams = &efw->capture_substreams;
}
/*
* Considering JACK/FFADO streaming:
* TODO: This can be removed hwdep functionality becomes popular.
*/
err = check_connection_used_by_others(efw, master);
if (err < 0)
goto end;
/* packet queueing error */
if (amdtp_streaming_error(slave))
stop_stream(efw, slave);
if (amdtp_streaming_error(master))
stop_stream(efw, master);
/* stop streams if rate is different */
err = snd_efw_command_get_sampling_rate(efw, &curr_rate);
if (err < 0)
goto end;
if (rate == 0)
rate = curr_rate;
if (rate != curr_rate) {
stop_stream(efw, slave);
stop_stream(efw, master);
}
/* master should be always running */
if (!amdtp_stream_running(master)) {
amdtp_stream_set_sync(sync_mode, master, slave);
efw->master = master;
err = snd_efw_command_set_sampling_rate(efw, rate);
if (err < 0)
goto end;
err = start_stream(efw, master, rate);
if (err < 0) {
dev_err(&efw->unit->device,
"fail to start AMDTP master stream:%d\n", err);
goto end;
}
}
/* start slave if needed */
if (atomic_read(slave_substreams) > 0 && !amdtp_stream_running(slave)) {
err = start_stream(efw, slave, rate);
if (err < 0) {
dev_err(&efw->unit->device,
"fail to start AMDTP slave stream:%d\n", err);
stop_stream(efw, master);
}
}
end:
mutex_unlock(&efw->mutex);
return err;
}
int snd_oxfw_stream_start_simplex(struct snd_oxfw *oxfw,
struct amdtp_stream *stream,
unsigned int rate, unsigned int pcm_channels)
{
struct amdtp_stream *opposite;
struct snd_oxfw_stream_formation formation;
enum avc_general_plug_dir dir;
unsigned int substreams, opposite_substreams;
int err = 0;
if (stream == &oxfw->tx_stream) {
substreams = oxfw->capture_substreams;
opposite = &oxfw->rx_stream;
opposite_substreams = oxfw->playback_substreams;
dir = AVC_GENERAL_PLUG_DIR_OUT;
} else {
substreams = oxfw->playback_substreams;
opposite_substreams = oxfw->capture_substreams;
if (oxfw->has_output)
opposite = &oxfw->rx_stream;
else
opposite = NULL;
dir = AVC_GENERAL_PLUG_DIR_IN;
}
if (substreams == 0)
goto end;
/*
* Considering JACK/FFADO streaming:
* TODO: This can be removed hwdep functionality becomes popular.
*/
err = check_connection_used_by_others(oxfw, stream);
if (err < 0)
goto end;
/* packet queueing error */
if (amdtp_streaming_error(stream))
stop_stream(oxfw, stream);
err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation);
if (err < 0)
goto end;
if (rate == 0)
rate = formation.rate;
if (pcm_channels == 0)
pcm_channels = formation.pcm;
if ((formation.rate != rate) || (formation.pcm != pcm_channels)) {
if (opposite != NULL) {
err = check_connection_used_by_others(oxfw, opposite);
if (err < 0)
goto end;
stop_stream(oxfw, opposite);
}
stop_stream(oxfw, stream);
err = set_stream_format(oxfw, stream, rate, pcm_channels);
if (err < 0) {
dev_err(&oxfw->unit->device,
"fail to set stream format: %d\n", err);
goto end;
}
/* Start opposite stream if needed. */
if (opposite && !amdtp_stream_running(opposite) &&
(opposite_substreams > 0)) {
err = start_stream(oxfw, opposite, rate, 0);
if (err < 0) {
dev_err(&oxfw->unit->device,
"fail to restart stream: %d\n", err);
goto end;
}
}
}
/* Start requested stream. */
if (!amdtp_stream_running(stream)) {
err = start_stream(oxfw, stream, rate, pcm_channels);
if (err < 0)
dev_err(&oxfw->unit->device,
"fail to start stream: %d\n", err);
}
end:
return err;
}
int snd_bebob_stream_start_duplex(struct snd_bebob *bebob, unsigned int rate)
{
const struct snd_bebob_rate_spec *rate_spec = bebob->spec->rate;
unsigned int curr_rate;
int err = 0;
/* Need no substreams */
if (bebob->substreams_counter == 0)
goto end;
/*
* Considering JACK/FFADO streaming:
* TODO: This can be removed hwdep functionality becomes popular.
*/
err = check_connection_used_by_others(bebob, &bebob->rx_stream);
if (err < 0)
goto end;
/*
* packet queueing error or detecting discontinuity
*
* At bus reset, connections should not be broken here. So streams need
* to be re-started. This is a reason to use SKIP_INIT_DBC_CHECK flag.
*/
if (amdtp_streaming_error(&bebob->rx_stream))
amdtp_stream_stop(&bebob->rx_stream);
if (amdtp_streaming_error(&bebob->tx_stream))
amdtp_stream_stop(&bebob->tx_stream);
if (!amdtp_stream_running(&bebob->rx_stream) &&
!amdtp_stream_running(&bebob->tx_stream))
break_both_connections(bebob);
/* stop streams if rate is different */
err = rate_spec->get(bebob, &curr_rate);
if (err < 0) {
dev_err(&bebob->unit->device,
"fail to get sampling rate: %d\n", err);
goto end;
}
if (rate == 0)
rate = curr_rate;
if (rate != curr_rate) {
amdtp_stream_stop(&bebob->rx_stream);
amdtp_stream_stop(&bebob->tx_stream);
break_both_connections(bebob);
}
/* master should be always running */
if (!amdtp_stream_running(&bebob->rx_stream)) {
/*
* NOTE:
* If establishing connections at first, Yamaha GO46
* (and maybe Terratec X24) don't generate sound.
*
* For firmware customized by M-Audio, refer to next NOTE.
*/
if (bebob->maudio_special_quirk == NULL) {
err = rate_spec->set(bebob, rate);
if (err < 0) {
dev_err(&bebob->unit->device,
"fail to set sampling rate: %d\n",
err);
goto end;
}
}
err = make_both_connections(bebob, rate);
if (err < 0)
goto end;
err = start_stream(bebob, &bebob->rx_stream, rate);
if (err < 0) {
dev_err(&bebob->unit->device,
"fail to run AMDTP master stream:%d\n", err);
break_both_connections(bebob);
goto end;
}
/*
* NOTE:
* The firmware customized by M-Audio uses these commands to
* start transmitting stream. This is not usual way.
*/
if (bebob->maudio_special_quirk != NULL) {
err = rate_spec->set(bebob, rate);
if (err < 0) {
dev_err(&bebob->unit->device,
"fail to ensure sampling rate: %d\n",
err);
amdtp_stream_stop(&bebob->rx_stream);
break_both_connections(bebob);
goto end;
}
}
/* wait first callback */
if (!amdtp_stream_wait_callback(&bebob->rx_stream,
CALLBACK_TIMEOUT)) {
amdtp_stream_stop(&bebob->rx_stream);
break_both_connections(bebob);
err = -ETIMEDOUT;
goto end;
}
}
/* start slave if needed */
if (!amdtp_stream_running(&bebob->tx_stream)) {
err = start_stream(bebob, &bebob->tx_stream, rate);
if (err < 0) {
dev_err(&bebob->unit->device,
"fail to run AMDTP slave stream:%d\n", err);
amdtp_stream_stop(&bebob->rx_stream);
break_both_connections(bebob);
goto end;
}
/* wait first callback */
if (!amdtp_stream_wait_callback(&bebob->tx_stream,
CALLBACK_TIMEOUT)) {
amdtp_stream_stop(&bebob->tx_stream);
amdtp_stream_stop(&bebob->rx_stream);
break_both_connections(bebob);
err = -ETIMEDOUT;
}
}
end:
return err;
}