sound/firewire/tascam/tascam-midi.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * tascam-midi.c - a part of driver for TASCAM FireWire series
   4  *
   5  * Copyright (c) 2015 Takashi Sakamoto
   6  */
   7
   8 #include "tascam.h"
   9
  10 static int midi_capture_open(struct snd_rawmidi_substream *substream)
  11 {
  12         /* Do nothing. */
  13         return 0;
  14 }
  15
  16 static int midi_playback_open(struct snd_rawmidi_substream *substream)
  17 {
  18         struct snd_tscm *tscm = substream->rmidi->private_data;
  19
  20         snd_fw_async_midi_port_init(&tscm->out_ports[substream->number]);
  21
  22         return 0;
  23 }
  24
  25 static int midi_capture_close(struct snd_rawmidi_substream *substream)
  26 {
  27         /* Do nothing. */
  28         return 0;
  29 }
  30
  31 static int midi_playback_close(struct snd_rawmidi_substream *substream)
  32 {
  33         return 0;
  34 }
  35
  36 static void midi_playback_drain(struct snd_rawmidi_substream *substream)
  37 {
  38         struct snd_tscm *tscm = substream->rmidi->private_data;
  39
  40         snd_fw_async_midi_port_finish(&tscm->out_ports[substream->number]);
  41 }
  42
  43 static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
  44 {
  45         struct snd_tscm *tscm = substrm->rmidi->private_data;
  46         unsigned long flags;
  47
  48         spin_lock_irqsave(&tscm->lock, flags);
  49
  50         if (up)
  51                 tscm->tx_midi_substreams[substrm->number] = substrm;
  52         else
  53                 tscm->tx_midi_substreams[substrm->number] = NULL;
  54
  55         spin_unlock_irqrestore(&tscm->lock, flags);
  56 }
  57
  58 static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
  59 {
  60         struct snd_tscm *tscm = substrm->rmidi->private_data;
  61         unsigned long flags;
  62
  63         spin_lock_irqsave(&tscm->lock, flags);
  64
  65         if (up)
  66                 snd_fw_async_midi_port_run(&tscm->out_ports[substrm->number],
  67                                            substrm);
  68
  69         spin_unlock_irqrestore(&tscm->lock, flags);
  70 }
  71
  72 int snd_tscm_create_midi_devices(struct snd_tscm *tscm)
  73 {
  74         static const struct snd_rawmidi_ops capture_ops = {
  75                 .open           = midi_capture_open,
  76                 .close          = midi_capture_close,
  77                 .trigger        = midi_capture_trigger,
  78         };
  79         static const struct snd_rawmidi_ops playback_ops = {
  80                 .open           = midi_playback_open,
  81                 .close          = midi_playback_close,
  82                 .drain          = midi_playback_drain,
  83                 .trigger        = midi_playback_trigger,
  84         };
  85         struct snd_rawmidi *rmidi;
  86         struct snd_rawmidi_str *stream;
  87         struct snd_rawmidi_substream *subs;
  88         int err;
  89
  90         err = snd_rawmidi_new(tscm->card, tscm->card->driver, 0,
  91                               tscm->spec->midi_playback_ports,
  92                               tscm->spec->midi_capture_ports,
  93                               &rmidi);
  94         if (err < 0)
  95                 return err;
  96
  97         snprintf(rmidi->name, sizeof(rmidi->name),
  98                  "%s MIDI", tscm->card->shortname);
  99         rmidi->private_data = tscm;
 100
 101         rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
 102         snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
 103                             &capture_ops);
 104         stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
 105
 106         /* Set port names for MIDI input. */
 107         list_for_each_entry(subs, &stream->substreams, list) {
 108                 /* TODO: support virtual MIDI ports. */
 109                 if (subs->number < tscm->spec->midi_capture_ports) {
 110                         /* Hardware MIDI ports. */
 111                         scnprintf(subs->name, sizeof(subs->name),
 112                                   "%s MIDI %d",
 113                                   tscm->card->shortname, subs->number + 1);
 114                 }
 115         }
 116
 117         rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
 118         snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
 119                             &playback_ops);
 120         stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
 121
 122         /* Set port names for MIDI ourput. */
 123         list_for_each_entry(subs, &stream->substreams, list) {
 124                 if (subs->number < tscm->spec->midi_playback_ports) {
 125                         /* Hardware MIDI ports only. */
 126                         scnprintf(subs->name, sizeof(subs->name),
 127                                   "%s MIDI %d",
 128                                   tscm->card->shortname, subs->number + 1);
 129                 }
 130         }
 131
 132         rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
 133
 134         return 0;
 135 }