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146 lines
3.5 KiB
146 lines
3.5 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* bebob_midi.c - a part of driver for BeBoB based devices |
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* |
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* Copyright (c) 2013-2014 Takashi Sakamoto |
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*/ |
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#include "bebob.h" |
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static int midi_open(struct snd_rawmidi_substream *substream) |
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{ |
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struct snd_bebob *bebob = substream->rmidi->private_data; |
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int err; |
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err = snd_bebob_stream_lock_try(bebob); |
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if (err < 0) |
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return err; |
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mutex_lock(&bebob->mutex); |
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err = snd_bebob_stream_reserve_duplex(bebob, 0, 0, 0); |
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if (err >= 0) { |
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++bebob->substreams_counter; |
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err = snd_bebob_stream_start_duplex(bebob); |
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if (err < 0) |
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--bebob->substreams_counter; |
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} |
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mutex_unlock(&bebob->mutex); |
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if (err < 0) |
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snd_bebob_stream_lock_release(bebob); |
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return err; |
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} |
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static int midi_close(struct snd_rawmidi_substream *substream) |
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{ |
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struct snd_bebob *bebob = substream->rmidi->private_data; |
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mutex_lock(&bebob->mutex); |
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bebob->substreams_counter--; |
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snd_bebob_stream_stop_duplex(bebob); |
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mutex_unlock(&bebob->mutex); |
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snd_bebob_stream_lock_release(bebob); |
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return 0; |
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} |
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static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up) |
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{ |
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struct snd_bebob *bebob = substrm->rmidi->private_data; |
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unsigned long flags; |
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spin_lock_irqsave(&bebob->lock, flags); |
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if (up) |
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amdtp_am824_midi_trigger(&bebob->tx_stream, |
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substrm->number, substrm); |
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else |
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amdtp_am824_midi_trigger(&bebob->tx_stream, |
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substrm->number, NULL); |
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spin_unlock_irqrestore(&bebob->lock, flags); |
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} |
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static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up) |
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{ |
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struct snd_bebob *bebob = substrm->rmidi->private_data; |
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unsigned long flags; |
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spin_lock_irqsave(&bebob->lock, flags); |
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if (up) |
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amdtp_am824_midi_trigger(&bebob->rx_stream, |
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substrm->number, substrm); |
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else |
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amdtp_am824_midi_trigger(&bebob->rx_stream, |
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substrm->number, NULL); |
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spin_unlock_irqrestore(&bebob->lock, flags); |
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} |
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static void set_midi_substream_names(struct snd_bebob *bebob, |
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struct snd_rawmidi_str *str) |
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{ |
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struct snd_rawmidi_substream *subs; |
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list_for_each_entry(subs, &str->substreams, list) { |
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snprintf(subs->name, sizeof(subs->name), |
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"%s MIDI %d", |
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bebob->card->shortname, subs->number + 1); |
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} |
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} |
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int snd_bebob_create_midi_devices(struct snd_bebob *bebob) |
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{ |
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static const struct snd_rawmidi_ops capture_ops = { |
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.open = midi_open, |
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.close = midi_close, |
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.trigger = midi_capture_trigger, |
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}; |
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static const struct snd_rawmidi_ops playback_ops = { |
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.open = midi_open, |
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.close = midi_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 *str; |
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int err; |
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/* create midi ports */ |
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err = snd_rawmidi_new(bebob->card, bebob->card->driver, 0, |
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bebob->midi_output_ports, bebob->midi_input_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", bebob->card->shortname); |
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rmidi->private_data = bebob; |
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if (bebob->midi_input_ports > 0) { |
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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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&capture_ops); |
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str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]; |
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set_midi_substream_names(bebob, str); |
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} |
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if (bebob->midi_output_ports > 0) { |
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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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&playback_ops); |
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str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]; |
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set_midi_substream_names(bebob, str); |
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} |
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if ((bebob->midi_output_ports > 0) && (bebob->midi_input_ports > 0)) |
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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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