sound/firewire/tascam/tascam-midi.c

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