@@ -376,24 +376,6 @@ map_data_channels(struct snd_bebob *bebob, struct amdtp_stream *s)
return err;
}
-static int
-init_both_connections(struct snd_bebob *bebob)
-{
- int err;
-
- err = cmp_connection_init(&bebob->in_conn,
- bebob->unit, CMP_INPUT, 0);
- if (err < 0)
- goto end;
-
- err = cmp_connection_init(&bebob->out_conn,
- bebob->unit, CMP_OUTPUT, 0);
- if (err < 0)
- cmp_connection_destroy(&bebob->in_conn);
-end:
- return err;
-}
-
static int
check_connection_used_by_others(struct snd_bebob *bebob, struct amdtp_stream *s)
{
@@ -448,13 +430,6 @@ break_both_connections(struct snd_bebob *bebob)
msleep(200);
}
-static void
-destroy_both_connections(struct snd_bebob *bebob)
-{
- cmp_connection_destroy(&bebob->in_conn);
- cmp_connection_destroy(&bebob->out_conn);
-}
-
static int
start_stream(struct snd_bebob *bebob, struct amdtp_stream *stream)
{
@@ -481,49 +456,77 @@ start_stream(struct snd_bebob *bebob, struct amdtp_stream *stream)
return err;
}
-int snd_bebob_stream_init_duplex(struct snd_bebob *bebob)
+static int init_stream(struct snd_bebob *bebob, struct amdtp_stream *stream)
{
+ enum amdtp_stream_direction dir_stream;
+ struct cmp_connection *conn;
+ enum cmp_direction dir_conn;
int err;
- err = init_both_connections(bebob);
+ if (stream == &bebob->tx_stream) {
+ dir_stream = AMDTP_IN_STREAM;
+ conn = &bebob->out_conn;
+ dir_conn = CMP_OUTPUT;
+ } else {
+ dir_stream = AMDTP_OUT_STREAM;
+ conn = &bebob->in_conn;
+ dir_conn = CMP_INPUT;
+ }
+
+ err = cmp_connection_init(conn, bebob->unit, dir_conn, 0);
if (err < 0)
- goto end;
+ return err;
- err = amdtp_am824_init(&bebob->tx_stream, bebob->unit,
- AMDTP_IN_STREAM, CIP_BLOCKING);
+ err = amdtp_am824_init(stream, bebob->unit, dir_stream, CIP_BLOCKING);
if (err < 0) {
- amdtp_stream_destroy(&bebob->tx_stream);
- destroy_both_connections(bebob);
- goto end;
+ cmp_connection_destroy(conn);
+ return err;
}
- /*
- * BeBoB v3 transfers packets with these qurks:
- * - In the beginning of streaming, the value of dbc is incremented
- * even if no data blocks are transferred.
- * - The value of dbc is reset suddenly.
- */
- if (bebob->version > 2)
- bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC |
- CIP_SKIP_DBC_ZERO_CHECK;
+ if (stream == &bebob->tx_stream) {
+ // BeBoB v3 transfers packets with these qurks:
+ // - In the beginning of streaming, the value of dbc is
+ // incremented even if no data blocks are transferred.
+ // - The value of dbc is reset suddenly.
+ if (bebob->version > 2)
+ bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC |
+ CIP_SKIP_DBC_ZERO_CHECK;
+
+ // At high sampling rate, M-Audio special firmware transmits
+ // empty packet with the value of dbc incremented by 8 but the
+ // others are valid to IEC 61883-1.
+ if (bebob->maudio_special_quirk)
+ bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC;
+ }
- /*
- * At high sampling rate, M-Audio special firmware transmits empty
- * packet with the value of dbc incremented by 8 but the others are
- * valid to IEC 61883-1.
- */
- if (bebob->maudio_special_quirk)
- bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC;
+ return 0;
+}
+
+static void destroy_stream(struct snd_bebob *bebob, struct amdtp_stream *stream)
+{
+ amdtp_stream_destroy(stream);
+
+ if (stream == &bebob->tx_stream)
+ cmp_connection_destroy(&bebob->out_conn);
+ else
+ cmp_connection_destroy(&bebob->in_conn);
+}
- err = amdtp_am824_init(&bebob->rx_stream, bebob->unit,
- AMDTP_OUT_STREAM, CIP_BLOCKING);
+int snd_bebob_stream_init_duplex(struct snd_bebob *bebob)
+{
+ int err;
+
+ err = init_stream(bebob, &bebob->tx_stream);
+ if (err < 0)
+ return err;
+
+ err = init_stream(bebob, &bebob->rx_stream);
if (err < 0) {
- amdtp_stream_destroy(&bebob->tx_stream);
- amdtp_stream_destroy(&bebob->rx_stream);
- destroy_both_connections(bebob);
+ destroy_stream(bebob, &bebob->tx_stream);
+ return err;
}
-end:
- return err;
+
+ return 0;
}
static int keep_resources(struct snd_bebob *bebob, struct amdtp_stream *stream,
@@ -693,10 +696,8 @@ void snd_bebob_stream_stop_duplex(struct snd_bebob *bebob)
*/
void snd_bebob_stream_destroy_duplex(struct snd_bebob *bebob)
{
- amdtp_stream_destroy(&bebob->rx_stream);
- amdtp_stream_destroy(&bebob->tx_stream);
-
- destroy_both_connections(bebob);
+ destroy_stream(bebob, &bebob->tx_stream);
+ destroy_stream(bebob, &bebob->rx_stream);
}
/*
This commit changes helper functions to initialize/destroy stream data so that it has an argument for direction. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> --- sound/firewire/bebob/bebob_stream.c | 121 ++++++++++++++-------------- 1 file changed, 61 insertions(+), 60 deletions(-)