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ALSA: fireworks: Add MIDI interface

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This commit adds a functionality to capture/playback MIDI messages.

When no AMDTP streams are running, this driver starts AMDTP stream for MIDI
stream at current sampling rate.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2014-04-25 22:45:09 +09:00 committed by Takashi Iwai
parent 6a22683e89
commit a63d3ff105
5 changed files with 159 additions and 1 deletions
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1
sound/firewire/Kconfig
View File

@ -64,6 +64,7 @@ config SND_SCS1X
config SND_FIREWORKS
tristate "Echo Fireworks board module support"
select SND_FIREWIRE_LIB
select SND_RAWMIDI
help
Say Y here to include support for FireWire devices based
on Echo Digital Audio Fireworks board:

3
sound/firewire/fireworks/Makefile
View File

@ -1,3 +1,4 @@
snd-fireworks-objs := fireworks_transaction.o fireworks_command.o \
fireworks_stream.o fireworks_proc.o fireworks.o
fireworks_stream.o fireworks_proc.o fireworks_midi.o \
fireworks.o
obj-m += snd-fireworks.o

6
sound/firewire/fireworks/fireworks.c
View File

@ -226,6 +226,12 @@ efw_probe(struct fw_unit *unit,
snd_efw_proc_init(efw);
if (efw->midi_out_ports || efw->midi_in_ports) {
err = snd_efw_create_midi_devices(efw);
if (err < 0)
goto error;
}
err = snd_efw_stream_init_duplex(efw);
if (err < 0)
goto error;

3
sound/firewire/fireworks/fireworks.h
View File

@ -22,6 +22,7 @@
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/info.h>
#include <sound/rawmidi.h>
#include "../packets-buffer.h"
#include "../iso-resources.h"
@ -198,6 +199,8 @@ void snd_efw_stream_destroy_duplex(struct snd_efw *efw);
void snd_efw_proc_init(struct snd_efw *efw);
int snd_efw_create_midi_devices(struct snd_efw *efw);
#define SND_EFW_DEV_ENTRY(vendor, model) \
{ \
.match_flags = IEEE1394_MATCH_VENDOR_ID | \

147
sound/firewire/fireworks/fireworks_midi.c Normal file
View File

@ -0,0 +1,147 @@
/*
* fireworks_midi.c - a part of driver for Fireworks based devices
*
* Copyright (c) 2009-2010 Clemens Ladisch
* Copyright (c) 2013-2014 Takashi Sakamoto
*
* Licensed under the terms of the GNU General Public License, version 2.
*/
#include "fireworks.h"
static int midi_capture_open(struct snd_rawmidi_substream *substream)
{
struct snd_efw *efw = substream->rmidi->private_data;
atomic_inc(&efw->capture_substreams);
return snd_efw_stream_start_duplex(efw, 0);
}
static int midi_playback_open(struct snd_rawmidi_substream *substream)
{
struct snd_efw *efw = substream->rmidi->private_data;
atomic_inc(&efw->playback_substreams);
return snd_efw_stream_start_duplex(efw, 0);
}
static int midi_capture_close(struct snd_rawmidi_substream *substream)
{
struct snd_efw *efw = substream->rmidi->private_data;
atomic_dec(&efw->capture_substreams);
snd_efw_stream_stop_duplex(efw);
return 0;
}
static int midi_playback_close(struct snd_rawmidi_substream *substream)
{
struct snd_efw *efw = substream->rmidi->private_data;
atomic_dec(&efw->playback_substreams);
snd_efw_stream_stop_duplex(efw);
return 0;
}
static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
{
struct snd_efw *efw = substrm->rmidi->private_data;
unsigned long flags;
spin_lock_irqsave(&efw->lock, flags);
if (up)
amdtp_stream_midi_trigger(&efw->tx_stream,
substrm->number, substrm);
else
amdtp_stream_midi_trigger(&efw->tx_stream,
substrm->number, NULL);
spin_unlock_irqrestore(&efw->lock, flags);
}
static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
{
struct snd_efw *efw = substrm->rmidi->private_data;
unsigned long flags;
spin_lock_irqsave(&efw->lock, flags);
if (up)
amdtp_stream_midi_trigger(&efw->rx_stream,
substrm->number, substrm);
else
amdtp_stream_midi_trigger(&efw->rx_stream,
substrm->number, NULL);
spin_unlock_irqrestore(&efw->lock, flags);
}
static struct snd_rawmidi_ops midi_capture_ops = {
.open = midi_capture_open,
.close = midi_capture_close,
.trigger = midi_capture_trigger,
};
static struct snd_rawmidi_ops midi_playback_ops = {
.open = midi_playback_open,
.close = midi_playback_close,
.trigger = midi_playback_trigger,
};
static void set_midi_substream_names(struct snd_efw *efw,
struct snd_rawmidi_str *str)
{
struct snd_rawmidi_substream *subs;
list_for_each_entry(subs, &str->substreams, list) {
snprintf(subs->name, sizeof(subs->name),
"%s MIDI %d", efw->card->shortname, subs->number + 1);
}
}
int snd_efw_create_midi_devices(struct snd_efw *efw)
{
struct snd_rawmidi *rmidi;
struct snd_rawmidi_str *str;
int err;
/* create midi ports */
err = snd_rawmidi_new(efw->card, efw->card->driver, 0,
efw->midi_out_ports, efw->midi_in_ports,
&rmidi);
if (err < 0)
return err;
snprintf(rmidi->name, sizeof(rmidi->name),
"%s MIDI", efw->card->shortname);
rmidi->private_data = efw;
if (efw->midi_in_ports > 0) {
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
&midi_capture_ops);
str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
set_midi_substream_names(efw, str);
}
if (efw->midi_out_ports > 0) {
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
&midi_playback_ops);
str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
set_midi_substream_names(efw, str);
}
if ((efw->midi_out_ports > 0) && (efw->midi_in_ports > 0))
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
return 0;
}