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/*
* motu-midi.h - a part of driver for MOTU FireWire series
*
* Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
*
* Licensed under the terms of the GNU General Public License, version 2.
*/
#include "motu.h"
static int midi_open(struct snd_rawmidi_substream *substream)
{
struct snd_motu *motu = substream->rmidi->private_data;
int err;
err = snd_motu_stream_lock_try(motu);
if (err < 0)
return err;
mutex_lock(&motu->mutex);
err = snd_motu_stream_reserve_duplex(motu, 0);
if (err >= 0) {
++motu->substreams_counter;
err = snd_motu_stream_start_duplex(motu);
if (err < 0)
--motu->substreams_counter;
}
mutex_unlock(&motu->mutex);
if (err < 0)
snd_motu_stream_lock_release(motu);
return err;
}
static int midi_close(struct snd_rawmidi_substream *substream)
{
struct snd_motu *motu = substream->rmidi->private_data;
mutex_lock(&motu->mutex);
--motu->substreams_counter;
snd_motu_stream_stop_duplex(motu);
mutex_unlock(&motu->mutex);
snd_motu_stream_lock_release(motu);
return 0;
}
static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
{
struct snd_motu *motu = substrm->rmidi->private_data;
unsigned long flags;
spin_lock_irqsave(&motu->lock, flags);
if (up)
amdtp_motu_midi_trigger(&motu->tx_stream, substrm->number,
substrm);
else
amdtp_motu_midi_trigger(&motu->tx_stream, substrm->number,
NULL);
spin_unlock_irqrestore(&motu->lock, flags);
}
static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
{
struct snd_motu *motu = substrm->rmidi->private_data;
unsigned long flags;
spin_lock_irqsave(&motu->lock, flags);
if (up)
amdtp_motu_midi_trigger(&motu->rx_stream, substrm->number,
substrm);
else
amdtp_motu_midi_trigger(&motu->rx_stream, substrm->number,
NULL);
spin_unlock_irqrestore(&motu->lock, flags);
}
static void set_midi_substream_names(struct snd_motu *motu,
struct snd_rawmidi_str *str)
{
struct snd_rawmidi_substream *subs;
list_for_each_entry(subs, &str->substreams, list) {
snprintf(subs->name, sizeof(subs->name),
"%s MIDI %d", motu->card->shortname, subs->number + 1);
}
}
int snd_motu_create_midi_devices(struct snd_motu *motu)
{
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(motu->card, motu->card->driver, 0, 1, 1, &rmidi);
if (err < 0)
return err;
snprintf(rmidi->name, sizeof(rmidi->name),
"%s MIDI", motu->card->shortname);
rmidi->private_data = motu;
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT |
SNDRV_RAWMIDI_INFO_OUTPUT |
SNDRV_RAWMIDI_INFO_DUPLEX;
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
&capture_ops);
str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
set_midi_substream_names(motu, str);
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
&playback_ops);
str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
set_midi_substream_names(motu, str);
return 0;
}
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