sound/firewire/fireworks/fireworks_midi.c

   1 /*
   2  * fireworks_midi.c - a part of driver for Fireworks based devices
   3  *
   4  * Copyright (c) 2009-2010 Clemens Ladisch
   5  * Copyright (c) 2013-2014 Takashi Sakamoto
   6  *
   7  * Licensed under the terms of the GNU General Public License, version 2.
   8  */
   9 #include "fireworks.h"
  10
  11 static int midi_capture_open(struct snd_rawmidi_substream *substream)
  12 {
  13         struct snd_efw *efw = substream->rmidi->private_data;
  14         int err;
  15
  16         err = snd_efw_stream_lock_try(efw);
  17         if (err < 0)
  18                 goto end;
  19
  20         mutex_lock(&efw->mutex);
  21         atomic_inc(&efw->capture_substreams);
  22         err = snd_efw_stream_start_duplex(efw, 0);
  23         mutex_unlock(&efw->mutex);
  24         if (err < 0)
  25                 snd_efw_stream_lock_release(efw);
  26
  27 end:
  28         return err;
  29 }
  30
  31 static int midi_playback_open(struct snd_rawmidi_substream *substream)
  32 {
  33         struct snd_efw *efw = substream->rmidi->private_data;
  34         int err;
  35
  36         err = snd_efw_stream_lock_try(efw);
  37         if (err < 0)
  38                 goto end;
  39
  40         mutex_lock(&efw->mutex);
  41         atomic_inc(&efw->playback_substreams);
  42         err = snd_efw_stream_start_duplex(efw, 0);
  43         mutex_unlock(&efw->mutex);
  44         if (err < 0)
  45                 snd_efw_stream_lock_release(efw);
  46 end:
  47         return err;
  48 }
  49
  50 static int midi_capture_close(struct snd_rawmidi_substream *substream)
  51 {
  52         struct snd_efw *efw = substream->rmidi->private_data;
  53
  54         mutex_lock(&efw->mutex);
  55         atomic_dec(&efw->capture_substreams);
  56         snd_efw_stream_stop_duplex(efw);
  57         mutex_unlock(&efw->mutex);
  58
  59         snd_efw_stream_lock_release(efw);
  60         return 0;
  61 }
  62
  63 static int midi_playback_close(struct snd_rawmidi_substream *substream)
  64 {
  65         struct snd_efw *efw = substream->rmidi->private_data;
  66
  67         mutex_lock(&efw->mutex);
  68         atomic_dec(&efw->playback_substreams);
  69         snd_efw_stream_stop_duplex(efw);
  70         mutex_unlock(&efw->mutex);
  71
  72         snd_efw_stream_lock_release(efw);
  73         return 0;
  74 }
  75
  76 static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
  77 {
  78         struct snd_efw *efw = substrm->rmidi->private_data;
  79         unsigned long flags;
  80
  81         spin_lock_irqsave(&efw->lock, flags);
  82
  83         if (up)
  84                 amdtp_am824_midi_trigger(&efw->tx_stream,
  85                                           substrm->number, substrm);
  86         else
  87                 amdtp_am824_midi_trigger(&efw->tx_stream,
  88                                           substrm->number, NULL);
  89
  90         spin_unlock_irqrestore(&efw->lock, flags);
  91 }
  92
  93 static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
  94 {
  95         struct snd_efw *efw = substrm->rmidi->private_data;
  96         unsigned long flags;
  97
  98         spin_lock_irqsave(&efw->lock, flags);
  99
 100         if (up)
 101                 amdtp_am824_midi_trigger(&efw->rx_stream,
 102                                          substrm->number, substrm);
 103         else
 104                 amdtp_am824_midi_trigger(&efw->rx_stream,
 105                                          substrm->number, NULL);
 106
 107         spin_unlock_irqrestore(&efw->lock, flags);
 108 }
 109
 110 static struct snd_rawmidi_ops midi_capture_ops = {
 111         .open           = midi_capture_open,
 112         .close          = midi_capture_close,
 113         .trigger        = midi_capture_trigger,
 114 };
 115
 116 static struct snd_rawmidi_ops midi_playback_ops = {
 117         .open           = midi_playback_open,
 118         .close          = midi_playback_close,
 119         .trigger        = midi_playback_trigger,
 120 };
 121
 122 static void set_midi_substream_names(struct snd_efw *efw,
 123                                      struct snd_rawmidi_str *str)
 124 {
 125         struct snd_rawmidi_substream *subs;
 126
 127         list_for_each_entry(subs, &str->substreams, list) {
 128                 snprintf(subs->name, sizeof(subs->name),
 129                          "%s MIDI %d", efw->card->shortname, subs->number + 1);
 130         }
 131 }
 132
 133 int snd_efw_create_midi_devices(struct snd_efw *efw)
 134 {
 135         struct snd_rawmidi *rmidi;
 136         struct snd_rawmidi_str *str;
 137         int err;
 138
 139         /* create midi ports */
 140         err = snd_rawmidi_new(efw->card, efw->card->driver, 0,
 141                               efw->midi_out_ports, efw->midi_in_ports,
 142                               &rmidi);
 143         if (err < 0)
 144                 return err;
 145
 146         snprintf(rmidi->name, sizeof(rmidi->name),
 147                  "%s MIDI", efw->card->shortname);
 148         rmidi->private_data = efw;
 149
 150         if (efw->midi_in_ports > 0) {
 151                 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
 152
 153                 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
 154                                     &midi_capture_ops);
 155
 156                 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
 157
 158                 set_midi_substream_names(efw, str);
 159         }
 160
 161         if (efw->midi_out_ports > 0) {
 162                 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
 163
 164                 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
 165                                     &midi_playback_ops);
 166
 167                 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
 168
 169                 set_midi_substream_names(efw, str);
 170         }
 171
 172         if ((efw->midi_out_ports > 0) && (efw->midi_in_ports > 0))
 173                 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
 174
 175         return 0;
 176 }