1 files changed, 80 insertions, 0 deletions
diff --git a/sound/firewire/oxfw/oxfw-stream.c b/sound/firewire/oxfw/oxfw-stream.c
new file mode 100644
index 0000000..ebd156f
--- /dev/null
+++ b/sound/firewire/oxfw/oxfw-stream.c
@@ -0,0 +1,80 @@
+/*
+ * oxfw_stream.c - a part of driver for OXFW970/971 based devices
+ *
+ * Copyright (c) 2014 Takashi Sakamoto
+ *
+ * Licensed under the terms of the GNU General Public License, version 2.
+ */
+
+#include "oxfw.h"
+
+int snd_oxfw_stream_init_simplex(struct snd_oxfw *oxfw)
+{
+	int err;
+
+	err = cmp_connection_init(&oxfw->in_conn, oxfw->unit,
+				  CMP_INPUT, 0);
+	if (err < 0)
+		goto end;
+
+	err = amdtp_stream_init(&oxfw->rx_stream, oxfw->unit,
+				AMDTP_OUT_STREAM, CIP_NONBLOCKING);
+	if (err < 0) {
+		amdtp_stream_destroy(&oxfw->rx_stream);
+		cmp_connection_destroy(&oxfw->in_conn);
+	}
+end:
+	return err;
+}
+
+static void stop_stream(struct snd_oxfw *oxfw)
+{
+	amdtp_stream_pcm_abort(&oxfw->rx_stream);
+	amdtp_stream_stop(&oxfw->rx_stream);
+	cmp_connection_break(&oxfw->in_conn);
+}
+
+int snd_oxfw_stream_start_simplex(struct snd_oxfw *oxfw)
+{
+	int err = 0;
+
+	if (amdtp_streaming_error(&oxfw->rx_stream))
+		stop_stream(oxfw);
+
+	if (amdtp_stream_running(&oxfw->rx_stream))
+		goto end;
+
+	err = cmp_connection_establish(&oxfw->in_conn,
+			amdtp_stream_get_max_payload(&oxfw->rx_stream));
+	if (err < 0)
+		goto end;
+
+	err = amdtp_stream_start(&oxfw->rx_stream,
+				 oxfw->in_conn.resources.channel,
+				 oxfw->in_conn.speed);
+	if (err < 0)
+		stop_stream(oxfw);
+end:
+	return err;
+}
+
+void snd_oxfw_stream_stop_simplex(struct snd_oxfw *oxfw)
+{
+	stop_stream(oxfw);
+}
+
+void snd_oxfw_stream_destroy_simplex(struct snd_oxfw *oxfw)
+{
+	stop_stream(oxfw);
+
+	amdtp_stream_destroy(&oxfw->rx_stream);
+	cmp_connection_destroy(&oxfw->in_conn);
+}
+
+void snd_oxfw_stream_update_simplex(struct snd_oxfw *oxfw)
+{
+	if (cmp_connection_update(&oxfw->in_conn) < 0)
+		stop_stream(oxfw);
+	else
+		amdtp_stream_update(&oxfw->rx_stream);
+}