130 строки
3.3 KiB
C
130 строки
3.3 KiB
C
/*
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* ff-midi.c - a part of driver for RME Fireface series
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*
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* Copyright (c) 2015-2017 Takashi Sakamoto
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*
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* Licensed under the terms of the GNU General Public License, version 2.
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*/
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#include "ff.h"
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static int midi_capture_open(struct snd_rawmidi_substream *substream)
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{
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/* Do nothing. */
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return 0;
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}
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static int midi_playback_open(struct snd_rawmidi_substream *substream)
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{
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struct snd_ff *ff = substream->rmidi->private_data;
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/* Initialize internal status. */
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ff->running_status[substream->number] = 0;
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ff->rx_midi_error[substream->number] = false;
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WRITE_ONCE(ff->rx_midi_substreams[substream->number], substream);
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return 0;
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}
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static int midi_capture_close(struct snd_rawmidi_substream *substream)
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{
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/* Do nothing. */
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return 0;
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}
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static int midi_playback_close(struct snd_rawmidi_substream *substream)
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{
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struct snd_ff *ff = substream->rmidi->private_data;
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cancel_work_sync(&ff->rx_midi_work[substream->number]);
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WRITE_ONCE(ff->rx_midi_substreams[substream->number], NULL);
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return 0;
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}
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static void midi_capture_trigger(struct snd_rawmidi_substream *substream,
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int up)
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{
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struct snd_ff *ff = substream->rmidi->private_data;
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unsigned long flags;
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spin_lock_irqsave(&ff->lock, flags);
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if (up)
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WRITE_ONCE(ff->tx_midi_substreams[substream->number],
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substream);
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else
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WRITE_ONCE(ff->tx_midi_substreams[substream->number], NULL);
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spin_unlock_irqrestore(&ff->lock, flags);
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}
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static void midi_playback_trigger(struct snd_rawmidi_substream *substream,
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int up)
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{
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struct snd_ff *ff = substream->rmidi->private_data;
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unsigned long flags;
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spin_lock_irqsave(&ff->lock, flags);
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if (up || !ff->rx_midi_error[substream->number])
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schedule_work(&ff->rx_midi_work[substream->number]);
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spin_unlock_irqrestore(&ff->lock, flags);
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}
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static void set_midi_substream_names(struct snd_rawmidi_str *stream,
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const char *const name)
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{
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struct snd_rawmidi_substream *substream;
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list_for_each_entry(substream, &stream->substreams, list) {
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snprintf(substream->name, sizeof(substream->name),
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"%s MIDI %d", name, substream->number + 1);
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}
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}
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int snd_ff_create_midi_devices(struct snd_ff *ff)
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{
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static const struct snd_rawmidi_ops midi_capture_ops = {
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.open = midi_capture_open,
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.close = midi_capture_close,
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.trigger = midi_capture_trigger,
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};
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static const struct snd_rawmidi_ops midi_playback_ops = {
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.open = midi_playback_open,
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.close = midi_playback_close,
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.trigger = midi_playback_trigger,
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};
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struct snd_rawmidi *rmidi;
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struct snd_rawmidi_str *stream;
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int err;
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err = snd_rawmidi_new(ff->card, ff->card->driver, 0,
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ff->spec->midi_out_ports, ff->spec->midi_in_ports,
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&rmidi);
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if (err < 0)
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return err;
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snprintf(rmidi->name, sizeof(rmidi->name),
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"%s MIDI", ff->card->shortname);
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rmidi->private_data = ff;
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rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
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snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
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&midi_capture_ops);
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stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
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set_midi_substream_names(stream, ff->card->shortname);
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rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
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snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
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&midi_playback_ops);
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stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
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set_midi_substream_names(stream, ff->card->shortname);
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rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
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return 0;
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}
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