2 * dice_midi.c - a part of driver for Dice based devices
4 * Copyright (c) 2014 Takashi Sakamoto
6 * Licensed under the terms of the GNU General Public License, version 2.
10 static int midi_open(struct snd_rawmidi_substream *substream)
12 struct snd_dice *dice = substream->rmidi->private_data;
15 err = snd_dice_stream_lock_try(dice);
19 mutex_lock(&dice->mutex);
21 dice->substreams_counter++;
22 err = snd_dice_stream_start_duplex(dice, 0);
24 mutex_unlock(&dice->mutex);
27 snd_dice_stream_lock_release(dice);
32 static int midi_close(struct snd_rawmidi_substream *substream)
34 struct snd_dice *dice = substream->rmidi->private_data;
36 mutex_lock(&dice->mutex);
38 dice->substreams_counter--;
39 snd_dice_stream_stop_duplex(dice);
41 mutex_unlock(&dice->mutex);
43 snd_dice_stream_lock_release(dice);
47 static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
49 struct snd_dice *dice = substrm->rmidi->private_data;
52 spin_lock_irqsave(&dice->lock, flags);
55 amdtp_am824_midi_trigger(&dice->tx_stream[0],
56 substrm->number, substrm);
58 amdtp_am824_midi_trigger(&dice->tx_stream[0],
59 substrm->number, NULL);
61 spin_unlock_irqrestore(&dice->lock, flags);
64 static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
66 struct snd_dice *dice = substrm->rmidi->private_data;
69 spin_lock_irqsave(&dice->lock, flags);
72 amdtp_am824_midi_trigger(&dice->rx_stream[0],
73 substrm->number, substrm);
75 amdtp_am824_midi_trigger(&dice->rx_stream[0],
76 substrm->number, NULL);
78 spin_unlock_irqrestore(&dice->lock, flags);
81 static void set_midi_substream_names(struct snd_dice *dice,
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),
88 "%s MIDI %d", dice->card->shortname, subs->number + 1);
92 int snd_dice_create_midi(struct snd_dice *dice)
94 static const struct snd_rawmidi_ops capture_ops = {
97 .trigger = midi_capture_trigger,
99 static const struct snd_rawmidi_ops playback_ops = {
102 .trigger = midi_playback_trigger,
105 struct snd_rawmidi *rmidi;
106 struct snd_rawmidi_str *str;
107 unsigned int midi_in_ports, midi_out_ports;
111 * Use the number of MIDI conformant data channel at current sampling
112 * transfer frequency.
114 err = snd_dice_transaction_read_tx(dice, TX_NUMBER_MIDI,
118 midi_in_ports = be32_to_cpu(reg);
120 err = snd_dice_transaction_read_rx(dice, RX_NUMBER_MIDI,
124 midi_out_ports = be32_to_cpu(reg);
126 if (midi_in_ports + midi_out_ports == 0)
129 /* create midi ports */
130 err = snd_rawmidi_new(dice->card, dice->card->driver, 0,
131 midi_out_ports, midi_in_ports,
136 snprintf(rmidi->name, sizeof(rmidi->name),
137 "%s MIDI", dice->card->shortname);
138 rmidi->private_data = dice;
140 if (midi_in_ports > 0) {
141 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
143 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
146 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
148 set_midi_substream_names(dice, str);
151 if (midi_out_ports > 0) {
152 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
154 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
157 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
159 set_midi_substream_names(dice, str);
162 if ((midi_out_ports > 0) && (midi_in_ports > 0))
163 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;