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 static struct snd_rawmidi_ops midi_capture_ops = {
  72         .open           = midi_capture_open,
  73         .close          = midi_capture_close,
  74         .trigger        = midi_capture_trigger,
  75 };
  76
  77 static struct snd_rawmidi_ops midi_playback_ops = {
  78         .open           = midi_playback_open,
  79         .close          = midi_playback_close,
  80         .trigger        = midi_playback_trigger,
  81 };
  82
  83 int snd_tscm_create_midi_devices(struct snd_tscm *tscm)
  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                             &midi_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                         snprintf(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                             &midi_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                         snprintf(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 }