From 0db18e7eec40a4331214185b37b0440856856775 Mon Sep 17 00:00:00 2001 From: Takashi Sakamoto Date: Mon, 12 Oct 2015 19:10:23 +0900 Subject: [PATCH 48/50] ALSA: firewire-tascam: add support for MIDI functionality In former commits, this driver got functionalities to transfer/receive MIDI messages to/from TASCAM FireWire series. This commit adds some ALSA MIDI ports to enable userspace applications to use the functionalities. I note that this commit doesn't support virtual MIDI ports which console models support. A physical controls can be assigned to a certain MIDI ports including physical and virtual. But the way is not clear. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- sound/firewire/tascam/Makefile | 2 +- sound/firewire/tascam/tascam-midi.c | 135 ++++++++++++++++++++++++++++++++++++ sound/firewire/tascam/tascam.c | 4 ++ sound/firewire/tascam/tascam.h | 2 + 4 files changed, 142 insertions(+), 1 deletion(-) create mode 100644 sound/firewire/tascam/tascam-midi.c diff --git a/sound/firewire/tascam/Makefile b/sound/firewire/tascam/Makefile index a1f9fe793c81..0fc955d5bd15 100644 --- a/sound/firewire/tascam/Makefile +++ b/sound/firewire/tascam/Makefile @@ -1,4 +1,4 @@ snd-firewire-tascam-objs := tascam-proc.o amdtp-tascam.o tascam-stream.o \ tascam-pcm.o tascam-hwdep.o tascam-transaction.o \ - tascam.o + tascam-midi.o tascam.o obj-$(CONFIG_SND_FIREWIRE_TASCAM) += snd-firewire-tascam.o diff --git a/sound/firewire/tascam/tascam-midi.c b/sound/firewire/tascam/tascam-midi.c new file mode 100644 index 000000000000..41f842079d9d --- /dev/null +++ b/sound/firewire/tascam/tascam-midi.c @@ -0,0 +1,135 @@ +/* + * tascam-midi.c - a part of driver for TASCAM FireWire series + * + * Copyright (c) 2015 Takashi Sakamoto + * + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#include "tascam.h" + +static int midi_capture_open(struct snd_rawmidi_substream *substream) +{ + /* Do nothing. */ + return 0; +} + +static int midi_playback_open(struct snd_rawmidi_substream *substream) +{ + struct snd_tscm *tscm = substream->rmidi->private_data; + + /* Initialize internal status. */ + tscm->running_status[substream->number] = 0; + tscm->on_sysex[substream->number] = 0; + return 0; +} + +static int midi_capture_close(struct snd_rawmidi_substream *substream) +{ + /* Do nothing. */ + return 0; +} + +static int midi_playback_close(struct snd_rawmidi_substream *substream) +{ + struct snd_tscm *tscm = substream->rmidi->private_data; + + snd_fw_async_midi_port_finish(&tscm->out_ports[substream->number]); + + return 0; +} + +static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up) +{ + struct snd_tscm *tscm = substrm->rmidi->private_data; + unsigned long flags; + + spin_lock_irqsave(&tscm->lock, flags); + + if (up) + tscm->tx_midi_substreams[substrm->number] = substrm; + else + tscm->tx_midi_substreams[substrm->number] = NULL; + + spin_unlock_irqrestore(&tscm->lock, flags); +} + +static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up) +{ + struct snd_tscm *tscm = substrm->rmidi->private_data; + unsigned long flags; + + spin_lock_irqsave(&tscm->lock, flags); + + if (up) + snd_fw_async_midi_port_run(&tscm->out_ports[substrm->number], + substrm); + + spin_unlock_irqrestore(&tscm->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, +}; + +int snd_tscm_create_midi_devices(struct snd_tscm *tscm) +{ + struct snd_rawmidi *rmidi; + struct snd_rawmidi_str *stream; + struct snd_rawmidi_substream *subs; + int err; + + err = snd_rawmidi_new(tscm->card, tscm->card->driver, 0, + tscm->spec->midi_playback_ports, + tscm->spec->midi_capture_ports, + &rmidi); + if (err < 0) + return err; + + snprintf(rmidi->name, sizeof(rmidi->name), + "%s MIDI", tscm->card->shortname); + rmidi->private_data = tscm; + + rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; + snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, + &midi_capture_ops); + stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]; + + /* Set port names for MIDI input. */ + list_for_each_entry(subs, &stream->substreams, list) { + /* TODO: support virtual MIDI ports. */ + if (subs->number < tscm->spec->midi_capture_ports) { + /* Hardware MIDI ports. */ + snprintf(subs->name, sizeof(subs->name), + "%s MIDI %d", + tscm->card->shortname, subs->number + 1); + } + } + + rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; + snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, + &midi_playback_ops); + stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]; + + /* Set port names for MIDI ourput. */ + list_for_each_entry(subs, &stream->substreams, list) { + if (subs->number < tscm->spec->midi_playback_ports) { + /* Hardware MIDI ports only. */ + snprintf(subs->name, sizeof(subs->name), + "%s MIDI %d", + tscm->card->shortname, subs->number + 1); + } + } + + rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; + + return 0; +} diff --git a/sound/firewire/tascam/tascam.c b/sound/firewire/tascam/tascam.c index de9e8df25569..dc07e3edbf5a 100644 --- a/sound/firewire/tascam/tascam.c +++ b/sound/firewire/tascam/tascam.c @@ -132,6 +132,10 @@ static int snd_tscm_probe(struct fw_unit *unit, if (err < 0) goto error; + err = snd_tscm_create_midi_devices(tscm); + if (err < 0) + goto error; + err = snd_tscm_create_hwdep_device(tscm); if (err < 0) goto error; diff --git a/sound/firewire/tascam/tascam.h b/sound/firewire/tascam/tascam.h index c2f0c74ab558..b86bb7f4f01d 100644 --- a/sound/firewire/tascam/tascam.h +++ b/sound/firewire/tascam/tascam.h @@ -138,6 +138,8 @@ void snd_tscm_proc_init(struct snd_tscm *tscm); int snd_tscm_create_pcm_devices(struct snd_tscm *tscm); +int snd_tscm_create_midi_devices(struct snd_tscm *tscm); + int snd_tscm_create_hwdep_device(struct snd_tscm *tscm); #endif -- 2.4.10