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128 lines
3.2 KiB
128 lines
3.2 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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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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#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->on_sysex[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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