static void finish_session(struct snd_dg00x *dg00x)
{
- __be32 data = cpu_to_be32(0x00000003);
+ __be32 data;
+
+ amdtp_stream_stop(&dg00x->tx_stream);
+ amdtp_stream_stop(&dg00x->rx_stream);
+ data = cpu_to_be32(0x00000003);
snd_fw_transaction(dg00x->unit, TCODE_WRITE_QUADLET_REQUEST,
DG00X_ADDR_BASE + DG00X_OFFSET_STREAMING_SET,
&data, sizeof(data), 0);
+
+ // Unregister isochronous channels for both direction.
+ data = 0;
+ snd_fw_transaction(dg00x->unit, TCODE_WRITE_QUADLET_REQUEST,
+ DG00X_ADDR_BASE + DG00X_OFFSET_ISOC_CHANNELS,
+ &data, sizeof(data), 0);
+
+ // Just after finishing the session, the device may lost transmitting
+ // functionality for a short time.
+ msleep(50);
}
static int begin_session(struct snd_dg00x *dg00x)
u32 curr;
int err;
+ // Register isochronous channels for both direction.
+ data = cpu_to_be32((dg00x->tx_resources.channel << 16) |
+ dg00x->rx_resources.channel);
+ err = snd_fw_transaction(dg00x->unit, TCODE_WRITE_QUADLET_REQUEST,
+ DG00X_ADDR_BASE + DG00X_OFFSET_ISOC_CHANNELS,
+ &data, sizeof(data), 0);
+ if (err < 0)
+ return err;
+
err = snd_fw_transaction(dg00x->unit, TCODE_READ_QUADLET_REQUEST,
DG00X_ADDR_BASE + DG00X_OFFSET_STREAMING_STATE,
&data, sizeof(data), 0);
if (err < 0)
- goto error;
+ return err;
curr = be32_to_cpu(data);
if (curr == 0)
DG00X_OFFSET_STREAMING_SET,
&data, sizeof(data), 0);
if (err < 0)
- goto error;
+ break;
msleep(20);
curr--;
}
- return 0;
-error:
- finish_session(dg00x);
return err;
}
-static void release_resources(struct snd_dg00x *dg00x)
+static int keep_resources(struct snd_dg00x *dg00x, struct amdtp_stream *stream,
+ unsigned int rate)
{
- __be32 data = 0;
-
- /* Unregister isochronous channels for both direction. */
- snd_fw_transaction(dg00x->unit, TCODE_WRITE_QUADLET_REQUEST,
- DG00X_ADDR_BASE + DG00X_OFFSET_ISOC_CHANNELS,
- &data, sizeof(data), 0);
-
- /* Release isochronous resources. */
- fw_iso_resources_free(&dg00x->tx_resources);
- fw_iso_resources_free(&dg00x->rx_resources);
-}
-
-static int keep_resources(struct snd_dg00x *dg00x, unsigned int rate)
-{
- unsigned int i;
- __be32 data;
+ struct fw_iso_resources *resources;
+ int i;
int err;
- /* Check sampling rate. */
+ // Check sampling rate.
for (i = 0; i < SND_DG00X_RATE_COUNT; i++) {
if (snd_dg00x_stream_rates[i] == rate)
break;
if (i == SND_DG00X_RATE_COUNT)
return -EINVAL;
- /* Keep resources for out-stream. */
- err = amdtp_dot_set_parameters(&dg00x->rx_stream, rate,
- snd_dg00x_stream_pcm_channels[i]);
- if (err < 0)
- return err;
- err = fw_iso_resources_allocate(&dg00x->rx_resources,
- amdtp_stream_get_max_payload(&dg00x->rx_stream),
- fw_parent_device(dg00x->unit)->max_speed);
- if (err < 0)
- return err;
+ if (stream == &dg00x->tx_stream)
+ resources = &dg00x->tx_resources;
+ else
+ resources = &dg00x->rx_resources;
- /* Keep resources for in-stream. */
- err = amdtp_dot_set_parameters(&dg00x->tx_stream, rate,
+ err = amdtp_dot_set_parameters(stream, rate,
snd_dg00x_stream_pcm_channels[i]);
if (err < 0)
return err;
- err = fw_iso_resources_allocate(&dg00x->tx_resources,
- amdtp_stream_get_max_payload(&dg00x->tx_stream),
- fw_parent_device(dg00x->unit)->max_speed);
- if (err < 0)
- goto error;
- /* Register isochronous channels for both direction. */
- data = cpu_to_be32((dg00x->tx_resources.channel << 16) |
- dg00x->rx_resources.channel);
- err = snd_fw_transaction(dg00x->unit, TCODE_WRITE_QUADLET_REQUEST,
- DG00X_ADDR_BASE + DG00X_OFFSET_ISOC_CHANNELS,
- &data, sizeof(data), 0);
- if (err < 0)
- goto error;
-
- return 0;
-error:
- release_resources(dg00x);
- return err;
+ return fw_iso_resources_allocate(resources,
+ amdtp_stream_get_max_payload(stream),
+ fw_parent_device(dg00x->unit)->max_speed);
}
int snd_dg00x_stream_init_duplex(struct snd_dg00x *dg00x)
fw_iso_resources_destroy(&dg00x->tx_resources);
}
-int snd_dg00x_stream_start_duplex(struct snd_dg00x *dg00x, unsigned int rate)
+int snd_dg00x_stream_reserve_duplex(struct snd_dg00x *dg00x, unsigned int rate)
{
unsigned int curr_rate;
- int err = 0;
-
- if (dg00x->substreams_counter == 0)
- goto end;
+ int err;
- /* Check current sampling rate. */
err = snd_dg00x_stream_get_local_rate(dg00x, &curr_rate);
if (err < 0)
- goto error;
+ return err;
if (rate == 0)
rate = curr_rate;
- if (curr_rate != rate ||
- amdtp_streaming_error(&dg00x->tx_stream) ||
- amdtp_streaming_error(&dg00x->rx_stream)) {
+
+ if (dg00x->substreams_counter == 0 || curr_rate != rate) {
finish_session(dg00x);
- amdtp_stream_stop(&dg00x->tx_stream);
- amdtp_stream_stop(&dg00x->rx_stream);
- release_resources(dg00x);
- }
+ fw_iso_resources_free(&dg00x->tx_resources);
+ fw_iso_resources_free(&dg00x->rx_resources);
- /*
- * No packets are transmitted without receiving packets, reagardless of
- * which source of clock is used.
- */
- if (!amdtp_stream_running(&dg00x->rx_stream)) {
err = snd_dg00x_stream_set_local_rate(dg00x, rate);
+ if (err < 0)
+ return err;
+
+ err = keep_resources(dg00x, &dg00x->rx_stream, rate);
+ if (err < 0)
+ return err;
+
+ err = keep_resources(dg00x, &dg00x->tx_stream, rate);
+ if (err < 0) {
+ fw_iso_resources_free(&dg00x->rx_resources);
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+int snd_dg00x_stream_start_duplex(struct snd_dg00x *dg00x)
+{
+ unsigned int generation = dg00x->rx_resources.generation;
+ int err = 0;
+
+ if (dg00x->substreams_counter == 0)
+ return 0;
+
+ if (amdtp_streaming_error(&dg00x->tx_stream) ||
+ amdtp_streaming_error(&dg00x->rx_stream))
+ finish_session(dg00x);
+
+ if (generation != fw_parent_device(dg00x->unit)->card->generation) {
+ err = fw_iso_resources_update(&dg00x->tx_resources);
if (err < 0)
goto error;
- err = keep_resources(dg00x, rate);
+ err = fw_iso_resources_update(&dg00x->rx_resources);
if (err < 0)
goto error;
+ }
+ /*
+ * No packets are transmitted without receiving packets, reagardless of
+ * which source of clock is used.
+ */
+ if (!amdtp_stream_running(&dg00x->rx_stream)) {
err = begin_session(dg00x);
if (err < 0)
goto error;
goto error;
}
}
-end:
- return err;
+
+ return 0;
error:
finish_session(dg00x);
- amdtp_stream_stop(&dg00x->tx_stream);
- amdtp_stream_stop(&dg00x->rx_stream);
- release_resources(dg00x);
-
return err;
}
void snd_dg00x_stream_stop_duplex(struct snd_dg00x *dg00x)
{
- if (dg00x->substreams_counter > 0)
- return;
-
- amdtp_stream_stop(&dg00x->tx_stream);
- amdtp_stream_stop(&dg00x->rx_stream);
- finish_session(dg00x);
- release_resources(dg00x);
+ if (dg00x->substreams_counter == 0) {
+ finish_session(dg00x);
- /*
- * Just after finishing the session, the device may lost transmitting
- * functionality for a short time.
- */
- msleep(50);
+ fw_iso_resources_free(&dg00x->tx_resources);
+ fw_iso_resources_free(&dg00x->rx_resources);
+ }
}
void snd_dg00x_stream_update_duplex(struct snd_dg00x *dg00x)
projects / linux-2.6-block.git / blobdiff