1 /*
2  * tascam-midi.c - a part of driver for TASCAM FireWire series
3  *
4  * Copyright (c) 2015 Takashi Sakamoto
5  *
6  * Licensed under the terms of the GNU General Public License, version 2.
7  */
8 
9 #include "tascam.h"
10 
11 static int midi_capture_open(struct snd_rawmidi_substream *substream)
12 {
13 	/* Do nothing. */
14 	return 0;
15 }
16 
17 static int midi_playback_open(struct snd_rawmidi_substream *substream)
18 {
19 	struct snd_tscm *tscm = substream->rmidi->private_data;
20 
21 	/* Initialize internal status. */
22 	tscm->running_status[substream->number] = 0;
23 	tscm->on_sysex[substream->number] = 0;
24 	return 0;
25 }
26 
27 static int midi_capture_close(struct snd_rawmidi_substream *substream)
28 {
29 	/* Do nothing. */
30 	return 0;
31 }
32 
33 static int midi_playback_close(struct snd_rawmidi_substream *substream)
34 {
35 	struct snd_tscm *tscm = substream->rmidi->private_data;
36 
37 	snd_fw_async_midi_port_finish(&tscm->out_ports[substream->number]);
38 
39 	return 0;
40 }
41 
42 static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
43 {
44 	struct snd_tscm *tscm = substrm->rmidi->private_data;
45 	unsigned long flags;
46 
47 	spin_lock_irqsave(&tscm->lock, flags);
48 
49 	if (up)
50 		tscm->tx_midi_substreams[substrm->number] = substrm;
51 	else
52 		tscm->tx_midi_substreams[substrm->number] = NULL;
53 
54 	spin_unlock_irqrestore(&tscm->lock, flags);
55 }
56 
57 static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
58 {
59 	struct snd_tscm *tscm = substrm->rmidi->private_data;
60 	unsigned long flags;
61 
62 	spin_lock_irqsave(&tscm->lock, flags);
63 
64 	if (up)
65 		snd_fw_async_midi_port_run(&tscm->out_ports[substrm->number],
66 					   substrm);
67 
68 	spin_unlock_irqrestore(&tscm->lock, flags);
69 }
70 
71 static struct snd_rawmidi_ops midi_capture_ops = {
72 	.open		= midi_capture_open,
73 	.close		= midi_capture_close,
74 	.trigger	= midi_capture_trigger,
75 };
76 
77 static struct snd_rawmidi_ops midi_playback_ops = {
78 	.open		= midi_playback_open,
79 	.close		= midi_playback_close,
80 	.trigger	= midi_playback_trigger,
81 };
82 
83 int snd_tscm_create_midi_devices(struct snd_tscm *tscm)
84 {
85 	struct snd_rawmidi *rmidi;
86 	struct snd_rawmidi_str *stream;
87 	struct snd_rawmidi_substream *subs;
88 	int err;
89 
90 	err = snd_rawmidi_new(tscm->card, tscm->card->driver, 0,
91 			      tscm->spec->midi_playback_ports,
92 			      tscm->spec->midi_capture_ports,
93 			      &rmidi);
94 	if (err < 0)
95 		return err;
96 
97 	snprintf(rmidi->name, sizeof(rmidi->name),
98 		 "%s MIDI", tscm->card->shortname);
99 	rmidi->private_data = tscm;
100 
101 	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
102 	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
103 			    &midi_capture_ops);
104 	stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
105 
106 	/* Set port names for MIDI input. */
107 	list_for_each_entry(subs, &stream->substreams, list) {
108 		/* TODO: support virtual MIDI ports. */
109 		if (subs->number < tscm->spec->midi_capture_ports) {
110 			/* Hardware MIDI ports. */
111 			snprintf(subs->name, sizeof(subs->name),
112 				 "%s MIDI %d",
113 				 tscm->card->shortname, subs->number + 1);
114 		}
115 	}
116 
117 	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
118 	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
119 			    &midi_playback_ops);
120 	stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
121 
122 	/* Set port names for MIDI ourput. */
123 	list_for_each_entry(subs, &stream->substreams, list) {
124 		if (subs->number < tscm->spec->midi_playback_ports) {
125 			/* Hardware MIDI ports only. */
126 			snprintf(subs->name, sizeof(subs->name),
127 				 "%s MIDI %d",
128 				 tscm->card->shortname, subs->number + 1);
129 		}
130 	}
131 
132 	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
133 
134 	return 0;
135 }
136