1 files changed, 146 insertions, 0 deletions
diff --git a/sound/firewire/bebob/bebob_midi.c b/sound/firewire/bebob/bebob_midi.c
new file mode 100644
index 0000000000..b1425bf98c
--- /dev/null
+++ b/sound/firewire/bebob/bebob_midi.c
@@ -0,0 +1,146 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * bebob_midi.c - a part of driver for BeBoB based devices
+ *
+ * Copyright (c) 2013-2014 Takashi Sakamoto
+ */
+
+#include "bebob.h"
+
+static int midi_open(struct snd_rawmidi_substream *substream)
+{
+	struct snd_bebob *bebob = substream->rmidi->private_data;
+	int err;
+
+	err = snd_bebob_stream_lock_try(bebob);
+	if (err < 0)
+		return err;
+
+	mutex_lock(&bebob->mutex);
+	err = snd_bebob_stream_reserve_duplex(bebob, 0, 0, 0);
+	if (err >= 0) {
+		++bebob->substreams_counter;
+		err = snd_bebob_stream_start_duplex(bebob);
+		if (err < 0)
+			--bebob->substreams_counter;
+	}
+	mutex_unlock(&bebob->mutex);
+	if (err < 0)
+		snd_bebob_stream_lock_release(bebob);
+
+	return err;
+}
+
+static int midi_close(struct snd_rawmidi_substream *substream)
+{
+	struct snd_bebob *bebob = substream->rmidi->private_data;
+
+	mutex_lock(&bebob->mutex);
+	bebob->substreams_counter--;
+	snd_bebob_stream_stop_duplex(bebob);
+	mutex_unlock(&bebob->mutex);
+
+	snd_bebob_stream_lock_release(bebob);
+	return 0;
+}
+
+static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
+{
+	struct snd_bebob *bebob = substrm->rmidi->private_data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&bebob->lock, flags);
+
+	if (up)
+		amdtp_am824_midi_trigger(&bebob->tx_stream,
+					 substrm->number, substrm);
+	else
+		amdtp_am824_midi_trigger(&bebob->tx_stream,
+					 substrm->number, NULL);
+
+	spin_unlock_irqrestore(&bebob->lock, flags);
+}
+
+static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
+{
+	struct snd_bebob *bebob = substrm->rmidi->private_data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&bebob->lock, flags);
+
+	if (up)
+		amdtp_am824_midi_trigger(&bebob->rx_stream,
+					 substrm->number, substrm);
+	else
+		amdtp_am824_midi_trigger(&bebob->rx_stream,
+					 substrm->number, NULL);
+
+	spin_unlock_irqrestore(&bebob->lock, flags);
+}
+
+static void set_midi_substream_names(struct snd_bebob *bebob,
+				     struct snd_rawmidi_str *str)
+{
+	struct snd_rawmidi_substream *subs;
+
+	list_for_each_entry(subs, &str->substreams, list) {
+		scnprintf(subs->name, sizeof(subs->name),
+			  "%s MIDI %d",
+			  bebob->card->shortname, subs->number + 1);
+	}
+}
+
+int snd_bebob_create_midi_devices(struct snd_bebob *bebob)
+{
+	static const struct snd_rawmidi_ops capture_ops = {
+		.open		= midi_open,
+		.close		= midi_close,
+		.trigger	= midi_capture_trigger,
+	};
+	static const struct snd_rawmidi_ops playback_ops = {
+		.open		= midi_open,
+		.close		= midi_close,
+		.trigger	= midi_playback_trigger,
+	};
+	struct snd_rawmidi *rmidi;
+	struct snd_rawmidi_str *str;
+	int err;
+
+	/* create midi ports */
+	err = snd_rawmidi_new(bebob->card, bebob->card->driver, 0,
+			      bebob->midi_output_ports, bebob->midi_input_ports,
+			      &rmidi);
+	if (err < 0)
+		return err;
+
+	snprintf(rmidi->name, sizeof(rmidi->name),
+		 "%s MIDI", bebob->card->shortname);
+	rmidi->private_data = bebob;
+
+	if (bebob->midi_input_ports > 0) {
+		rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
+
+		snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
+				    &capture_ops);
+
+		str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
+
+		set_midi_substream_names(bebob, str);
+	}
+
+	if (bebob->midi_output_ports > 0) {
+		rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
+
+		snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
+				    &playback_ops);
+
+		str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
+
+		set_midi_substream_names(bebob, str);
+	}
+
+	if ((bebob->midi_output_ports > 0) && (bebob->midi_input_ports > 0))
+		rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
+
+	return 0;
+}