diff options
Diffstat (limited to '')
-rw-r--r-- | sound/firewire/fireface/ff-midi.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/sound/firewire/fireface/ff-midi.c b/sound/firewire/fireface/ff-midi.c new file mode 100644 index 000000000..25821d186 --- /dev/null +++ b/sound/firewire/fireface/ff-midi.c @@ -0,0 +1,128 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * ff-midi.c - a part of driver for RME Fireface series + * + * Copyright (c) 2015-2017 Takashi Sakamoto + */ + +#include "ff.h" + +static int midi_capture_open(struct snd_rawmidi_substream *substream) +{ + /* Do nothing. */ + return 0; +} + +static int midi_playback_open(struct snd_rawmidi_substream *substream) +{ + struct snd_ff *ff = substream->rmidi->private_data; + + /* Initialize internal status. */ + ff->on_sysex[substream->number] = 0; + ff->rx_midi_error[substream->number] = false; + + WRITE_ONCE(ff->rx_midi_substreams[substream->number], substream); + + return 0; +} + +static int midi_capture_close(struct snd_rawmidi_substream *substream) +{ + /* Do nothing. */ + return 0; +} + +static int midi_playback_close(struct snd_rawmidi_substream *substream) +{ + struct snd_ff *ff = substream->rmidi->private_data; + + cancel_work_sync(&ff->rx_midi_work[substream->number]); + WRITE_ONCE(ff->rx_midi_substreams[substream->number], NULL); + + return 0; +} + +static void midi_capture_trigger(struct snd_rawmidi_substream *substream, + int up) +{ + struct snd_ff *ff = substream->rmidi->private_data; + unsigned long flags; + + spin_lock_irqsave(&ff->lock, flags); + + if (up) + WRITE_ONCE(ff->tx_midi_substreams[substream->number], + substream); + else + WRITE_ONCE(ff->tx_midi_substreams[substream->number], NULL); + + spin_unlock_irqrestore(&ff->lock, flags); +} + +static void midi_playback_trigger(struct snd_rawmidi_substream *substream, + int up) +{ + struct snd_ff *ff = substream->rmidi->private_data; + unsigned long flags; + + spin_lock_irqsave(&ff->lock, flags); + + if (up || !ff->rx_midi_error[substream->number]) + schedule_work(&ff->rx_midi_work[substream->number]); + + spin_unlock_irqrestore(&ff->lock, flags); +} + +static void set_midi_substream_names(struct snd_rawmidi_str *stream, + const char *const name) +{ + struct snd_rawmidi_substream *substream; + + list_for_each_entry(substream, &stream->substreams, list) { + snprintf(substream->name, sizeof(substream->name), + "%s MIDI %d", name, substream->number + 1); + } +} + +int snd_ff_create_midi_devices(struct snd_ff *ff) +{ + static const struct snd_rawmidi_ops midi_capture_ops = { + .open = midi_capture_open, + .close = midi_capture_close, + .trigger = midi_capture_trigger, + }; + static const struct snd_rawmidi_ops midi_playback_ops = { + .open = midi_playback_open, + .close = midi_playback_close, + .trigger = midi_playback_trigger, + }; + struct snd_rawmidi *rmidi; + struct snd_rawmidi_str *stream; + int err; + + err = snd_rawmidi_new(ff->card, ff->card->driver, 0, + ff->spec->midi_out_ports, ff->spec->midi_in_ports, + &rmidi); + if (err < 0) + return err; + + snprintf(rmidi->name, sizeof(rmidi->name), + "%s MIDI", ff->card->shortname); + rmidi->private_data = ff; + + rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; + snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, + &midi_capture_ops); + stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]; + set_midi_substream_names(stream, ff->card->shortname); + + rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; + snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, + &midi_playback_ops); + stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]; + set_midi_substream_names(stream, ff->card->shortname); + + rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; + + return 0; +} |