1 // SPDX-License-Identifier: GPL-2.0-only
3 * dice_midi.c - a part of driver for Dice based devices
5 * Copyright (c) 2014 Takashi Sakamoto
9 static int midi_open(struct snd_rawmidi_substream *substream)
11 struct snd_dice *dice = substream->rmidi->private_data;
14 err = snd_dice_stream_lock_try(dice);
18 mutex_lock(&dice->mutex);
20 err = snd_dice_stream_reserve_duplex(dice, 0, 0, 0);
22 ++dice->substreams_counter;
23 err = snd_dice_stream_start_duplex(dice);
25 --dice->substreams_counter;
28 mutex_unlock(&dice->mutex);
31 snd_dice_stream_lock_release(dice);
36 static int midi_close(struct snd_rawmidi_substream *substream)
38 struct snd_dice *dice = substream->rmidi->private_data;
40 mutex_lock(&dice->mutex);
42 --dice->substreams_counter;
43 snd_dice_stream_stop_duplex(dice);
45 mutex_unlock(&dice->mutex);
47 snd_dice_stream_lock_release(dice);
51 static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
53 struct snd_dice *dice = substrm->rmidi->private_data;
56 spin_lock_irqsave(&dice->lock, flags);
59 amdtp_am824_midi_trigger(&dice->tx_stream[0],
60 substrm->number, substrm);
62 amdtp_am824_midi_trigger(&dice->tx_stream[0],
63 substrm->number, NULL);
65 spin_unlock_irqrestore(&dice->lock, flags);
68 static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
70 struct snd_dice *dice = substrm->rmidi->private_data;
73 spin_lock_irqsave(&dice->lock, flags);
76 amdtp_am824_midi_trigger(&dice->rx_stream[0],
77 substrm->number, substrm);
79 amdtp_am824_midi_trigger(&dice->rx_stream[0],
80 substrm->number, NULL);
82 spin_unlock_irqrestore(&dice->lock, flags);
85 static void set_midi_substream_names(struct snd_dice *dice,
86 struct snd_rawmidi_str *str)
88 struct snd_rawmidi_substream *subs;
90 list_for_each_entry(subs, &str->substreams, list) {
91 scnprintf(subs->name, sizeof(subs->name),
92 "%s MIDI %d", dice->card->shortname, subs->number + 1);
96 int snd_dice_create_midi(struct snd_dice *dice)
98 static const struct snd_rawmidi_ops capture_ops = {
101 .trigger = midi_capture_trigger,
103 static const struct snd_rawmidi_ops playback_ops = {
106 .trigger = midi_playback_trigger,
108 struct snd_rawmidi *rmidi;
109 struct snd_rawmidi_str *str;
110 unsigned int midi_in_ports, midi_out_ports;
116 for (i = 0; i < MAX_STREAMS; ++i) {
117 midi_in_ports = max(midi_in_ports, dice->tx_midi_ports[i]);
118 midi_out_ports = max(midi_out_ports, dice->rx_midi_ports[i]);
121 if (midi_in_ports + midi_out_ports == 0)
124 /* create midi ports */
125 err = snd_rawmidi_new(dice->card, dice->card->driver, 0,
126 midi_out_ports, midi_in_ports,
131 snprintf(rmidi->name, sizeof(rmidi->name),
132 "%s MIDI", dice->card->shortname);
133 rmidi->private_data = dice;
135 if (midi_in_ports > 0) {
136 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
138 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
141 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
143 set_midi_substream_names(dice, str);
146 if (midi_out_ports > 0) {
147 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
149 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
152 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
154 set_midi_substream_names(dice, str);
157 if ((midi_out_ports > 0) && (midi_in_ports > 0))
158 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;