1 // SPDX-License-Identifier: GPL-2.0-only
3 * bebob_midi.c - a part of driver for BeBoB based devices
5 * Copyright (c) 2013-2014 Takashi Sakamoto
10 static int midi_open(struct snd_rawmidi_substream *substream)
12 struct snd_bebob *bebob = substream->rmidi->private_data;
15 err = snd_bebob_stream_lock_try(bebob);
19 mutex_lock(&bebob->mutex);
20 err = snd_bebob_stream_reserve_duplex(bebob, 0);
22 ++bebob->substreams_counter;
23 err = snd_bebob_stream_start_duplex(bebob);
25 --bebob->substreams_counter;
27 mutex_unlock(&bebob->mutex);
29 snd_bebob_stream_lock_release(bebob);
34 static int midi_close(struct snd_rawmidi_substream *substream)
36 struct snd_bebob *bebob = substream->rmidi->private_data;
38 mutex_lock(&bebob->mutex);
39 bebob->substreams_counter--;
40 snd_bebob_stream_stop_duplex(bebob);
41 mutex_unlock(&bebob->mutex);
43 snd_bebob_stream_lock_release(bebob);
47 static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
49 struct snd_bebob *bebob = substrm->rmidi->private_data;
52 spin_lock_irqsave(&bebob->lock, flags);
55 amdtp_am824_midi_trigger(&bebob->tx_stream,
56 substrm->number, substrm);
58 amdtp_am824_midi_trigger(&bebob->tx_stream,
59 substrm->number, NULL);
61 spin_unlock_irqrestore(&bebob->lock, flags);
64 static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
66 struct snd_bebob *bebob = substrm->rmidi->private_data;
69 spin_lock_irqsave(&bebob->lock, flags);
72 amdtp_am824_midi_trigger(&bebob->rx_stream,
73 substrm->number, substrm);
75 amdtp_am824_midi_trigger(&bebob->rx_stream,
76 substrm->number, NULL);
78 spin_unlock_irqrestore(&bebob->lock, flags);
81 static void set_midi_substream_names(struct snd_bebob *bebob,
82 struct snd_rawmidi_str *str)
84 struct snd_rawmidi_substream *subs;
86 list_for_each_entry(subs, &str->substreams, list) {
87 snprintf(subs->name, sizeof(subs->name),
89 bebob->card->shortname, subs->number + 1);
93 int snd_bebob_create_midi_devices(struct snd_bebob *bebob)
95 static const struct snd_rawmidi_ops capture_ops = {
98 .trigger = midi_capture_trigger,
100 static const struct snd_rawmidi_ops playback_ops = {
103 .trigger = midi_playback_trigger,
105 struct snd_rawmidi *rmidi;
106 struct snd_rawmidi_str *str;
109 /* create midi ports */
110 err = snd_rawmidi_new(bebob->card, bebob->card->driver, 0,
111 bebob->midi_output_ports, bebob->midi_input_ports,
116 snprintf(rmidi->name, sizeof(rmidi->name),
117 "%s MIDI", bebob->card->shortname);
118 rmidi->private_data = bebob;
120 if (bebob->midi_input_ports > 0) {
121 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
123 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
126 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
128 set_midi_substream_names(bebob, str);
131 if (bebob->midi_output_ports > 0) {
132 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
134 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
137 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
139 set_midi_substream_names(bebob, str);
142 if ((bebob->midi_output_ports > 0) && (bebob->midi_input_ports > 0))
143 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;