147 lines
3.5 KiB
C
147 lines
3.5 KiB
C
// 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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