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/*
* bebob_midi.c - a part of driver for BeBoB based devices
*
* Copyright (c) 2013-2014 Takashi Sakamoto
*
* Licensed under the terms of the GNU General Public License, version 2.
*/
#include "bebob.h"
static int midi_open(struct snd_rawmidi_substream *substream)
{
struct snd_bebob *bebob = substream->rmidi->private_data;
int err;
err = snd_bebob_stream_lock_try(bebob);
if (err < 0)
return err;
mutex_lock(&bebob->mutex);
err = snd_bebob_stream_reserve_duplex(bebob, 0);
if (err >= 0) {
++bebob->substreams_counter;
err = snd_bebob_stream_start_duplex(bebob);
if (err < 0)
--bebob->substreams_counter;
}
mutex_unlock(&bebob->mutex);
if (err < 0)
snd_bebob_stream_lock_release(bebob);
return err;
}
static int midi_close(struct snd_rawmidi_substream *substream)
{
struct snd_bebob *bebob = substream->rmidi->private_data;
mutex_lock(&bebob->mutex);
bebob->substreams_counter--;
snd_bebob_stream_stop_duplex(bebob);
mutex_unlock(&bebob->mutex);
snd_bebob_stream_lock_release(bebob);
return 0;
}
static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
{
struct snd_bebob *bebob = substrm->rmidi->private_data;
unsigned long flags;
spin_lock_irqsave(&bebob->lock, flags);
if (up)
amdtp_am824_midi_trigger(&bebob->tx_stream,
substrm->number, substrm);
else
amdtp_am824_midi_trigger(&bebob->tx_stream,
substrm->number, NULL);
spin_unlock_irqrestore(&bebob->lock, flags);
}
static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
{
struct snd_bebob *bebob = substrm->rmidi->private_data;
unsigned long flags;
spin_lock_irqsave(&bebob->lock, flags);
if (up)
amdtp_am824_midi_trigger(&bebob->rx_stream,
substrm->number, substrm);
else
amdtp_am824_midi_trigger(&bebob->rx_stream,
substrm->number, NULL);
spin_unlock_irqrestore(&bebob->lock, flags);
}
static void set_midi_substream_names(struct snd_bebob *bebob,
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",
bebob->card->shortname, subs->number + 1);
}
}
int snd_bebob_create_midi_devices(struct snd_bebob *bebob)
{
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(bebob->card, bebob->card->driver, 0,
bebob->midi_output_ports, bebob->midi_input_ports,
&rmidi);
if (err < 0)
return err;
snprintf(rmidi->name, sizeof(rmidi->name),
"%s MIDI", bebob->card->shortname);
rmidi->private_data = bebob;
if (bebob->midi_input_ports > 0) {
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
&capture_ops);
str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
set_midi_substream_names(bebob, str);
}
if (bebob->midi_output_ports > 0) {
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
&playback_ops);
str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
set_midi_substream_names(bebob, str);
}
if ((bebob->midi_output_ports > 0) && (bebob->midi_input_ports > 0))
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
return 0;
}
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