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         snd_fw_async_midi_port_init(&tscm->out_ports[substream->number]);
  22
  23         return 0;
  24 }
  25
  26 static int midi_capture_close(struct snd_rawmidi_substream *substream)
  27 {
  28         /* Do nothing. */
  29         return 0;
  30 }
  31
  32 static int midi_playback_close(struct snd_rawmidi_substream *substream)
  33 {
  34         return 0;
  35 }
  36
  37 static void midi_playback_drain(struct snd_rawmidi_substream *substream)
  38 {
  39         struct snd_tscm *tscm = substream->rmidi->private_data;
  40
  41         snd_fw_async_midi_port_finish(&tscm->out_ports[substream->number]);
  42 }
  43
  44 static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
  45 {
  46         struct snd_tscm *tscm = substrm->rmidi->private_data;
  47         unsigned long flags;
  48
  49         spin_lock_irqsave(&tscm->lock, flags);
  50
  51         if (up)
  52                 tscm->tx_midi_substreams[substrm->number] = substrm;
  53         else
  54                 tscm->tx_midi_substreams[substrm->number] = NULL;
  55
  56         spin_unlock_irqrestore(&tscm->lock, flags);
  57 }
  58
  59 static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
  60 {
  61         struct snd_tscm *tscm = substrm->rmidi->private_data;
  62         unsigned long flags;
  63
  64         spin_lock_irqsave(&tscm->lock, flags);
  65
  66         if (up)
  67                 snd_fw_async_midi_port_run(&tscm->out_ports[substrm->number],
  68                                            substrm);
  69
  70         spin_unlock_irqrestore(&tscm->lock, flags);
  71 }
  72
  73 int snd_tscm_create_midi_devices(struct snd_tscm *tscm)
  74 {
  75         static const struct snd_rawmidi_ops capture_ops = {
  76                 .open           = midi_capture_open,
  77                 .close          = midi_capture_close,
  78                 .trigger        = midi_capture_trigger,
  79         };
  80         static const struct snd_rawmidi_ops playback_ops = {
  81                 .open           = midi_playback_open,
  82                 .close          = midi_playback_close,
  83                 .drain          = midi_playback_drain,
  84                 .trigger        = midi_playback_trigger,
  85         };
  86         struct snd_rawmidi *rmidi;
  87         struct snd_rawmidi_str *stream;
  88         struct snd_rawmidi_substream *subs;
  89         int err;
  90
  91         err = snd_rawmidi_new(tscm->card, tscm->card->driver, 0,
  92                               tscm->spec->midi_playback_ports,
  93                               tscm->spec->midi_capture_ports,
  94                               &rmidi);
  95         if (err < 0)
  96                 return err;
  97
  98         snprintf(rmidi->name, sizeof(rmidi->name),
  99                  "%s MIDI", tscm->card->shortname);
 100         rmidi->private_data = tscm;
 101
 102         rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
 103         snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
 104                             &capture_ops);
 105         stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
 106
 107         /* Set port names for MIDI input. */
 108         list_for_each_entry(subs, &stream->substreams, list) {
 109                 /* TODO: support virtual MIDI ports. */
 110                 if (subs->number < tscm->spec->midi_capture_ports) {
 111                         /* Hardware MIDI ports. */
 112                         snprintf(subs->name, sizeof(subs->name),
 113                                  "%s MIDI %d",
 114                                  tscm->card->shortname, subs->number + 1);
 115                 }
 116         }
 117
 118         rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
 119         snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
 120                             &playback_ops);
 121         stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
 122
 123         /* Set port names for MIDI ourput. */
 124         list_for_each_entry(subs, &stream->substreams, list) {
 125                 if (subs->number < tscm->spec->midi_playback_ports) {
 126                         /* Hardware MIDI ports only. */
 127                         snprintf(subs->name, sizeof(subs->name),
 128                                  "%s MIDI %d",
 129                                  tscm->card->shortname, subs->number + 1);
 130                 }
 131         }
 132
 133         rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
 134
 135         return 0;
 136 }